How to finish a large span of concrete

How to level concrete (screed) in a larger area than my screed board.

You can solve this problem in several ways. Professionals glue the leveling posts inside the formwork at convenient intervals (less than the width of the screed board). The level posts will be marked with the appropriate level on the post, usually a nail in a wooden post. You can put concrete in the molds and using the leveling pegs as a guide, start the screed. Once you have the proper grade on the concrete, you can pull out the posts of the slope. As you can see, it takes some experience to get it right, but beginners can do it with less precision.
Another method is to get a probe such as a steel stick or pin, mark it with the desired depth for the concrete, and then place the concrete into the molds. Pour in the concrete and drill to ensure proper depth. It’s not as effective as the first method, but with a little more effort it will get the job done. You can set construction joints (1×4’s, metal keyway forms, etc) inside the forms at intervals of 25-30 times the depth of the slab. They can be used as screed guides.

Finally, you can set screed guides inside the forms using 2×4’s and stakes so that the bottom of the 2×4’s are at the top of where you want the concrete to be. Nail the lugs to the end and top of the screed board so that when the board is placed on the rails, the bottom of the board is flush with the bottom of the rail, and then leveled with the top where the concrete will be. After the concrete has been laid and the screed has been laid, these screed guides can be pulled, filled in the dowel holes and realigned by eye.

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How to finish a large span of concrete

Questo articolo "Fai da te passo dopo passo".how to finish a concrete slab. As a result, you need some tools that you can buy or make yourself to give the concrete a nice finish. Overall, there are many possible finishes you can give your concrete slab or foundation, but the easiest way is to use a large spatula made up of 2 × 4 boards. Nevertheless, make sure you finish the concrete slab or foundation as soon as possible, otherwise the concrete might dry out and you won’t be able to use the float to smoothen its surface. Finishing a large concrete arch is more complicated than smaller projects as you need some friends to help you and some techniques to get the job done right.

Made with this plan

In order tofinishing the concrete slab, you need:

Materials

  • Concrete
  • Wooden boards for the construction of forms
  • 2 × 2 lumber for fixing the modules

Tools

  • Protective gloves, protective goggles
  • To measure
  • Bristle brush for finishing the concrete slab
  • A wooden trowel to level a concrete slab
  • Use shoes to avoid staining your clothes and skin with concrete
  • Thoroughly clean your tools after completing your project
  • Several hours up to the day, depending on the surface

How to pour a concrete slab

How to finish a large span of concrete

Pouring concrete with a pipe

In order topour a slab you need to level off the surface and build a basic formwork. Formwork is usually made from wooden planks, but make sure it is stiff as the concrete is under great pressure when poured.

When building the formwork, you need to make sure that it is flush and level. It is imperative to build the formwork at the same level on all sides as in most cases it will be necessary to use a batten (a long, straight piece of wood or metal) to keep the concrete surface flat.

If your yard is large, the concrete mixer can pour concrete directly into the formwork. Tuttavia, ci sono casi in cui il camion non può raggiungere una determinata posizione, quindi è necessario utilizzare una pompa e tubi da 4 “. W takim przypadku upewnij się, że wylewasz beton możliwie równomiernie na całej powierzchni, w przeciwnym razie finishing the concrete slab będzie trudne.

How to finish a large span of concrete

How to pour a concrete slab

Remember that actually pouring concrete in the formwork with a hose, isn’t as easily as it might seem at the first glance. On the contrary, the person in charge of this operation must be used to it, otherwise he could even get injured in the process.

When pouring a concrete slab, the pipe becomes very heavy, so it’s worth asking some friends for help. Make sure you use rubber boots, old clothes and protective gloves, otherwise the concrete could damage your skin.

How to finish a concrete slab

How to finish a large span of concrete

Finishing concrete slabs

As a result, it was possible to build a float using a regular stick and a 2 × 4 wooden board. The board should be approximately 2 feet wide for easy use when finishing a concrete slab. If the weather is very hot, you should hurry yourself, otherwise the concrete might dry out and you woundn’t be able to finishing the concrete slab.

How to finish a large span of concrete

How to finishing the concrete slab

Keep using the trowel all over, making sure the concrete has a nice finish. As you can see in the photo, you still have to use rubber boots to be able to finish the concrete over the entire surface.

Thanks for reading our article onhow to finish a concrete slab and we encourage you to familiarize yourself with our other projects. If you liked our designs, please like and SHARE on Twitter or Facebook.

How to finish a large span of concrete

Concrete joints are used to compensate when concrete expands or shrinks with changes in temperature. Concrete joints are normally used to prevent cracks when the concrete shrinks by creating forming, tooling, sawing, and placing joint formers. Pre-planned cracks will provide a better finish to the concrete product and will form at specific points where these cracks can be monitored. Sometimes, due to the material and the width or span of concrete joints, it is necessary to improve the performance of the material and allow the materials to expand / contract or move without damaging other structures.

Concrete Contraction Jointts

Designed to create a weakened area in the concrete and to adjust the positions of the cracks, usually in a straight line. The shrinkage joints must be positioned so as to obtain panels that are as square as possible and never exceed a length / width ratio of 1 ½ to 1. The joints are generally spaced 24 to 30 times the thickness of the panel.

Joint distances greater than 15 feet require load-bearing devices. Shrinkage joints can be inserted into the concrete surface during installation. Joints can also be cut into the hardened concrete surface. It is important to understand that the longer the cut is delayed, the more likely it is that cracks will form before the cut is complete.

Concrete Expansion Jointts

Concrete expansion joints are used to separate slabs and concrete from other parts of the structure. Expansion joints allow for independent movement between adjacent structural elements, minimizing cracking when such movements are limited. It allows for thermal expansion and contraction without stressing the system.

Why do we need it?

Construction joints are used in situations where two consecutive concrete systems meet. Construction joints are typically placed at the end of the day or when the concrete has stood still longer than the initial setting time of the concrete. Structural connections should be designed and defined by a structural engineer. You can also gain traction and continue reinforcement through the construction gap. If sufficient PCC is available at the end of the day, the construction joint can be placed over the planned transverse contraction joint.

Placement tips

Observe the following recommended tips:

  • The maximum distance between the blanks should be 24 to 36 times the thickness of the board.
  • The joints should be spaced approximately 10 feet apart and a maximum of 15 feet apart.
  • When a heat shrink joint groove is used, the joint should have a minimum depth of ¼ of the panel thickness.
  • The sawn joints must be made within 4-12 hours after pouring the concrete.
  • Wedge connections are not recommended for industrial floors.
  • Dry cut joints must be made within 1-4 hours after finishing the finishing work.
  • Use a pre-formed joint compound to separate the panels from building walls or strip foundations. Put 2 inches of sand over the base to prevent it from sticking to the base.
  • If the panel contains wire mesh, it is recommended to break the mesh through the shrinkage joints.
  • The spacing of the cracks must also be selected so that the cross sections of the concrete are approximately square.
  • It is advisable to make concrete connections along the line of columns, sawn or entrance.
  • Metal dowels should be used in heavy duty plates.
  • Plan the exact location of all links, including cutting times.
  • Use insulating connections between slabs and columns, walls and feet, and where curbs or sidewalks touch other concrete structures.
  • Materials used on concrete joints must be flexible enough to absorb or deform as needed and then being able to restore back to their original state.
  • Always look for materials that are permeable and bond to concrete.

Tools

The following tools are typically used to create concrete joints, although these tools may vary depending on the size and scope of the project. Here are the most used tools:

  • Hand or foot chaser:depending on how big the pot is, you can choose between these two.
  • Wireless articulation tools:ideal for use in small to medium sized projects.
  • Concrete saw: ideal for sawing concrete with a saw, but remember to know how deep the cut should be. Otherwise, you can create other problems.

For cutting joints in dry concrete, instead of a concrete saw, you can use a matrix grinder with a mason’s knife.

How to finish a large span of concrete

Correctly arranged joints. Note: Internal corners where cracks usually occur have well-spaced joints.

It is important to proactively decide on the placement of control connections. Often splicing is not taken seriously enough and a “saw” enters your work and places the cuts where they believe they belong or where it is convenient for them. Most floors have no marked gaps between the joints. So don’t leave this important part of the reinforced concrete structure to chance.

WHAT ARE CONTROL JOINTS?

Control gaps are planned cracks that allow movement due to temperature fluctuations and drying shrinkage. In other words, if the concrete is cracking, you want an active role in deciding where it will crack and whether it will crack in a straight line rather than randomly.

WHEN TO CUT THE CONTROL JOINTS?

Make sure you cut the seams quickly enough. In hot weather, concrete can crack if the joints are not cut within 6-12 hours after finishing the concrete. Therefore, if you don’t want to use a grooving tool to cut the joints, there are lightweight dry-cutting saws available that can be used almost immediately afterwards. These saws cut 1 to 3 inches deep depending on the model.

CONTROL MODEL

Spacing (in feet) no more than 2-3 times the thickness of the board (in inches). The 4 “board should have connectors 8-12 feet apart.

When laying joints, skilled contractors often use them to create an attractive diamond pattern. If your concrete is going to be printed, ask about the best ways to avoid breaking the model with the control joints. Watch this video for a good solution: Pouring Concrete with Zip Strips.

Concrete Groover Video (Placing Control Jointts in Fresh Concrete)
Time: 03:11

OTHER INSTRUCTIONS FOR CONNECTION

  • Cut the joints deep enough
    Cut the joints to 25% of the depth of the board. A 4-inch thick plate should have 1-inch deep seams.
  • How to cut the joints
    Tools do rowkowania wycinają spoiny w świeżym betonie. The saw cuts the seams as soon as the concrete is hard enough that the edges adjacent to the cut do not flake off the saw blade.
  • Place joints against walls or under carpets
    You can’t see them under the walls. Under the carpets, the connectors will not have the ability to wire through areas of the vinyl.
  • Avoid re-entering shifts
    Planning a connection model can sometimes eliminate concave corners.

CONTROL JOINT VS. JOIN THE EXPANSION

Control joints are designed to control cracking, while expansion joints are designed to allow movement. I giunti di dilatazione o i giunti di isolamento vengono utilizzati tra due diversi calcestruzzi o dove il calcestruzzo incontra un altro materiale o addirittura una struttura. Expansion joints are more common on big commercial projects and often aren’t required when pouring residential slabs. These joints usually require filling, especially if the concrete is going to be polished or finished with a coating (see Sealing Jointts in a Concrete Slab).

Updated on 05/03/2021

More and more commercial, catering, warehouse, fleet management and office facilities are choosing polished concrete floors as an alternative to marble, granite, tiles, VCT, wood, linoleum or coated concrete. Even homeowners see the appeal of these smooth, glossy floors that can be tinted to recreate the look of polished stone.

Considering Polished Concrete Floor or looking for a trustable contractor to provide Concrete Polishing Services? Here is your mandatory COMPLETE GUIDE ON GLOSSY CONCRETE.

How to finish a large span of concrete

GLOSSY CONCRETE: A COMPLETE GUIDE

CHAPTERS

1. Polished Concrete Fundamentals

What is Polished Concrete?

Concrete polerowany to beton, który został poddany szeregowi mechanicznie szlifowanych etapów „polerowania/szlifowania” przy użyciu profesjonalnego sprzętu przeznaczonego do polerowania betonu. This process also involves the use of a concrete thickener / hardener which penetrates the concrete and causes a chemical reaction to help harden and protect the surface from dust. When polishing concrete, the surface is machined in a series of passes (typically at least 6-8 sanding passes are considered smooth concrete) using increasingly finer sanding tools. Tools szlifierskie to progresywne ziarna diamentów przemysłowych w spoiwie, takim jak metal/hybryda/żywica, często określane jako diamentowe pady polerskie.

Concrete is not considered well polished before 800 grit, and it is normally finished to either the 800, 1500, or 3000 grit level. Dyes designed to polish concrete are often used to add color to polished concrete, as well as other options such as drawing, creating radial lines, meshes, bands, edges, and other patterns.

2. Why Polished Concrete

Simply put, a polished concrete flooring system transforms a porous concrete floor into a stretched surface dense enough that water, oil and other contaminants cannot penetrate the surface.

Elegance and Attractiveness

Very strong and durable

Less maintenance

Long extended life

High profitability

Friendly hygienic

Minimum downtime

Better ambient lighting

3. Concrete Polishing Process

How to finish a large span of concrete

Today’s industry breaks down the concrete grinding process into grinding and polishing. Some people simply use the word “polishing” for the whole process. Each phase is then divided into a series of phases made up in turn of finer abrasive grains. Every step is refined to its purest possible form on a microscopic level from one progressively finer abrasive to the next until the desired level of ‘polishing’ is achieved.

In these processes, a thickener / hardener is used which is absorbed into the concrete, causing a chemical reaction that makes the concrete more dense and harder.

Recent advances in polishing equipment and techniques have enabled the smoothing, grinding and polishing of concrete to a high luster with crisp reflections and depth. This process is performed by large planetary head machines, where the main head rotates in one direction and the smaller satellite heads rotate in the opposite direction.

The result is a beautiful, durable and efficient surface that eliminates the need for carpets or tiles that require expensive replacements, maintenance and the use of harsh cleaners.

IMPORTANT ADVICE

The maximum “clarity of reflection” and “durability” of the surface is obtained by strictly following the procedures with which the contractor carries out the sequence of the grains. Even if the desired result is not reflective sharpness or a glass-like finish, each grain must be fully polished for maximum durability and a clean, crisp appearance for the finished surface. Groats must not be skipped in the processing sequence.

The concrete polishing process is very technical and requires true craftsmanship.

4. Options & Choices

There are many options available for different Polished Concrete designs. A different exposure of the aggregates, a different clarity of reflection and a different colored color will significantly change the visual aspects and physical properties of the polished concrete floor. Quindi conosci le tue opzioni e i potenziali risultati prima di fare la tua scelta.

4.1 Aggregate exposure

The floor aggregate exposure represents the amount of aggregate that will be exposed to the surface. Consider the needs and functions of your building when deciding if the overall exposure is appropriate. Grinding concrete to expose aggregate may be considered attractive for a commercial space, but may not be suitable for manufacturing premises where fallen fasteners must be easily spotted on the floor.

Below are the four most common aggregate exposure levels for polished concrete floor finishes.

Light sand / cream finish
Light exposure to sand is a smooth, smooth surface, usually exposing only sand particles in the concrete floor. This finish is considered a “creamy looking” surface and is the most popular choice for Architectural Ground & Polished floors.

Salt & Pepper Finish
The Salt & Pepper exposure is a ground and polished surface, typically exposing a spattering of fine aggregate in the betonowa podłoga. This finish is often chosen to give a distressed look to the surface. Surface cut depth approximately 1/16 inch.

Average aggregate finish
Average aggregate exposure typically exhibits the highest amount of average aggregate in the concrete floor with little or no high aggregate exposure in random locations. Surface cut depth approximately 1/8 inch.

Great aggregate finish
A large exposed aggregate is a more “trimmed” surface, which typically exposes the most of the larger aggregate in the concrete floor. The finish is often chosen when the substrate has been seeded with non-standard aggregate. For some floors, including renovating old concrete, there may be limits to the depth of cut of the floor. 1/4 inch of approximate cutting surface.

How to finish a large span of concreteQuickly installed with less effort, maintenance-free precast concrete crossing bridges ensure a long service life. These eight culvert models show why prefabricated elements are the best choice for a variety of site conditions.

Gary K. Munkelt, PE

The maintenance and replacement of bridges over small waterways is a constant problem of the transport entities responsible for their maintenance. However, in recent years, infrastructure funding has failed to meet maintenance needs and, when bridges are not maintained, structures have fallen into disrepair.

A decision must be made when the bridge needs to be replaced. Should the bridge be replaced in nature or are there better alternatives? The decision will be made on the basis of considerations such as cost, complexity of the project, available materials and the period of closure of the motorway to traffic. Future maintenance should always be part of the decision making process.

How to finish a large span of concreteMaintenance free service and supply of ASTM facilities

There are several systems to consider before replacing the bridge. An alternative bridge system to consider is prefabricated culverts. They offer a variety of sizes and configurations to suit specific site conditions. A properly installed precast concrete bridge can ensure maintenance-free operation for many years. There are concrete structures in operation today that are 100 years old, and many of these structures don’t require an annual maintenance budget. Concrete pozostaje na swoim miejscu rok po roku i spełnia swoje zadanie.

The design of culverts is not difficult and is usually done by a prefab manufacturer. Standards such as ASTM C1577-11a1 provide guidance to ensure that product design is appropriate. By always producing the same product, the prefab industry can offer reliable, high quality products. Prefab manufacturers are located in most areas of the country, making the product readily available. Competition between producers helps promote cost economics.

How to finish a large span of concreteAdvantages of prefabricated bridges over CIP systems

Replacing a creek bridge using a conventional pour-in-place (CIP) installation can close the road for 10 to 12 months due to the time it takes for the concrete to harden in place. For typical CIP jobs, the foundation must be installed first. After hardening, it is possible to make the formwork of the plinths and then pour the concrete again. After this time, a longer curing time is required to form and lay the concrete pavement. Waiting three to four weeks between dyes significantly increases the time it takes to complete a project.

Less time and labor: A precast concrete box culvert can be installed much faster than CIP construction, because the three – to four-week curing time is spent at the fabricator’s plant. Prefab culverts are often fabricated before a project begins. In many cases, on-site preparation takes less than a week. The assembly of ready-made prefabricated culverts takes only a few days. There are underground canal installations on provincial roads, where the road is only closed for two or three weeks. Quick installation offers the added benefit of cost savings as uptime is minimized.

How to finish a large span of concreteDesign agencies should consult with prefab contractors in the project area to determine their capabilities. Using manufacturer standard product sizes usually allows the manufacturer to provide a more effective quote.
Design Flexibility: The culvert concept has been modified over the years to address many problems on the construction site. The standard rectangular boxes are produced in many combinations of height and width. ASTM C1577 provides the table for dimensions ranging from 3 feet wide by 2 feet high to 12 feet wide by 12 feet high. Other sizes are available and are limited only by the ability of local prefabs to accommodate their molds.

Eight projects meet different construction conditions

Many precast culverts configurations can be used to cover junctions ranging from narrow flows to fairly wide flows. The benefits of each of these structures are typically unique to the workplace, facility contractor or prefab manufacturer. Here are eight prefab culvert models:

1. Single box bushing: A 3-foot to 12-foot wide structure with wing walls is installed (from end to end depending on the width of the road) on narrow waterways. The height of the box depends on the capacity and the conditions of the ground.

How to finish a large span of concrete2. Double box culvert:Two 12-foot-wide culverts are used together under the freeways that contain medium-width streams.

3. Three box bushing: Three 12 ‘wide culverts are lined up side by side for larger flows. The length of the culverts depends on the width of the highway.

4. Bottom plate of the tank: Some designers require a modified baseplate to provide a small vacuum for low flow rates during dry periods. This modification consists of a second concrete casting which can be molded into any desired shape.

5. Design with a flap: An innovative method to reduce the weight of each element is the use of a “clamshell” structure, in which the box is made up of two parts. The contractor has the advantage of halving the weight of the product, requiring lighter and cheaper equipment during installation.

How to finish a large span of concrete6. U-shaped design: Some manufacturers make a box using a U-shaped piece and placing a flat plate on top. Or they use a flat plate on the bottom and place the U-shaped piece upside down.

7. Three-sided arch design: It is an adaptation of the culvert concept without bottom plate. It is popular where there are environmental problems or a desire to avoid creek bed disturbances. This structure can rest on a CIP base on opposite sides of the flow. The three-sided arch spans the stream without adversely affecting the stream’s natural state.

8. Faunal passages:Single-shell, U-shaped, or three-sided arches can be used to provide safe passage for wildlife under roads.

How to finish a large span of concrete1 ASTM C1577-11a, “Standard Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers Designed According to AASHTO LFRD”

Introduction: How to Finish Concrete

How to finish a large span of concrete

How to finish a large span of concrete

How to finish a large span of concrete

Have you ever seen a pavement poured concrete again and watched someone finish the concrete? You probably didn’t pay a lot of attention but you noticed someone down on their hands and knees with a trowel moving around the concrete surface. Like anything someone else experienced, it seemed easy. Guess what? It’s not that easy unless you have done some homework. Sakrete is here to provide you with tips and instructions on how to finish concrete like a pro.

Step 1: Pouring the Concrete

After the concrete has been well blended, pour it into the molds, filling them slightly. Then take a straight board (a 2×4 piece of lumber works great as long as it isn’t bowed) and simply level off the concrete. Używając deski, która jest dłuższa niż szerokość wylewki i wykonując ruchy piłowania, pracuj tam i z powrotem, aż beton będzie równy. You really need someone on the other side to help you with this side. This is called “leveling” if you are trying to learn new words that you can impress your friends with.

Step 2: Smooth the Concrete Surface

If you haven’t done this before or only done it a few times you are likely to make two mistakes; too early and too much mashing. Both have the effect of attracting particles and water to the surface. This can cause surface weakening, fine cracks, and a white, dusty surface.

Then, with a wooden trowel or magnesium trowel, sand the surface if you want an ornament. This should only take a few minutes. Don’t try to turn it into a masterpiece, leave it in an art class. This step is simply a relatively smooth surface on the concrete. When you’re done, clean out the mixer and tools and grab something to drink. Keep an eye on the concrete. The first thing you will notice is that some of the spilled water will flow to the surface. This is a good thing. Let all the water disappear before doing anything else. This could take 20 minutes or 4 hours depending on the temperature, humidity and wind strength.

After all the rain water is gone, you can take out the steel finishing trowel and apply the last few cuts. You will notice that the steel spatula is not perfectly flat. This is done so that during the trowel you are more likely to slightly raise the leading edge and avoid digging into the concrete.

Step 3: Use a Broom to Finish the Surface Texture of the Concrete

Even following my exceptional instructions, it is doubtful that your surface will look professional. As I said in the beginning, using a trowel isn’t all that easy. However, most of us are good with a broom. If your mother brought you up right, you’ve had lots of practice. Once you are done with the trowel, simply grab a soft broom and gently drag it across the surface. Always pull the broom (never push) and always go in the same direction. One step is enough. I personally prefer a broom finish as it makes the surface a bit rougher. This is very useful in situations where the flooring is wet. The hard surface, troweled with a trowel, is very slippery. Unless your brother-in-law is a really good lawyer, you don’t want someone take a tumble on your property. Concrete Repair is never fun. Besides this way everyone will think you really knew what you doing and you won’t have to tell them about the broom trick.

Step 4: Cure the Concrete

Don’t stop reading yet or you will miss one very important point. You have to “harden” the concrete. If the concrete isn’t kept moist for a few days it may crack. The problem is that the surface dries while the bottom is still wet, creating stresses that substantially tear the concrete. There are several ways to harden concrete. It is easiest to spray it very lightly with a hose. You can cover it with a wet cloth such as burlap (don’t let the burlap dry out). You can also use chemical hardeners such as Sakrete Cure `N Seal. The question of how long and how often is difficult as it depends on the temperature, humidity and air flow. The warmer, drier and windier it is, the more water will need to be reapplied.

Bob Schmidt
Product manager
North American sacrifice

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How to finish a large span of concrete Jastrych Concrete is one of the first steps in laying and finishing concrete. Screed is the art of smoothing or removing the surface of concrete after it has been roughly raking. When the screed is made correctly, a smooth and flat surface will be obtained, free of bumps, holes and depressions. Usually, some small-scale DIY enthusiasts can do it, like a sidewalk. But I highly recommend that you leave everything to other professionals, especially if you want the job done right. Too often I have seen people trying to achieve something concrete screedjobs that are out of their reach and the final product doesn’t come out.

Jastrych Concrete it’s an art form!

Screeding Concrete – Picking The Right Screed

The right tool forconcrete screed it can be as simple as a 2X4 piece that always seems accessible wherever concrete is poured, or it can be as extreme as a larger laser screed machine. Choosing the right tool for the job will, of course, depend on the work you are doing.

How to finish a large span of concreteManual screeds – Manual screed is physically the hardest way to lay concrete, but in the right hands it’s the most accurate way. Manual screeds can be in 2X4 straight wood. I wouldn’t recommend using one longer than 12 to 14 feet. Or an aluminum spout would be a better solution. This spout shape is probably the best DIY option for pouring a walkway, patio, or other small project.

How to finish a large span of concreteElectric screeds – The mechanical screed greatly facilitates the smoothing process by leveling and / or vibrating the wet concrete mix. They are usually used for larger dyes. If quality matters, I wouldn’t recommend using it unless you’ve been trained. They save time and effort, but are not always the most accurate cards with experienced operators. How to finish a large span of concrete

Roller rails, also known as rotating rails – Though I don’t have much experience with roller screeds I know that they can be very handy and very accurate. Rolls up to 24 feet in length are available with many different fixings to give you excellent gutters, curbs and more. A roller conveyor is essential if permeable concrete is used. The best part is that the roller bar is so easy to use that even a beginner can get decent quality How to finish a large span of concrete

Trellis screeds– Vibrating grid screeds are one of the most accurate methodsconcrete screed that I’ve used. Truss slats can have multiple bolted sections to access large spans. They are built to work on molds or rails that are set up prior to pouring.

How to finish a large span of concrete

Laser tables Laser tips are typically used for larger nozzles where accuracy is important. This is probably the simplest and most accurate form of screed. The laser beam is usually operated by a guy, several rakes, and a laser set to height. This special screed is usually not something everyone can use, it requires special training to be able to handle it. Many times, companies that own lasers rent them from an operator.

Screeding Concrete – The Process Behind It

Screeding Concrete takes place immediately after pouring the concrete, rough raking and manual trimming of the edges. The sooner the better, if you leave the concrete for too long it will be too difficult to work with.

The purpose of the screed is to level the surface without leaving holes, bumps and irregularities. This is achieved by creating guides that must be followed during the screed. The guides can be molds, rails, floating edges by hand or wet screeds drawn to the appropriate height. Each leveling tool follows the guides differently to achieve a flat surface. For the average DIY enthusiast, a spout in an area where molds can ride and that is smaller than the spout is highly recommended.

Segui queste indicazioni durante la posa e tieni sempre da 1/2 pollice a 1 pollice di cemento davanti alla tavola per riempire tutti i fori e i punti inferiori. If you leave a lot of gaps when screed, you probably don’t leave enough mud or are driving too fast. If you’re using a screed and are able to ride on molds, start at one end and work your way through the sawdust motion to seal the surface.

After you’ve finished removing any bumps or bumps, filling in all the larger holes (the smaller holes will be filled with the bull’s float), making sure all the heights and slopes are correct, it’s time to float.

How to finish a large span of concrete

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The corrugated metal roof and the mid-span support ensure a successful casting

How to finish a large span of concrete

I am going to build a porch with a 14 foot. an 18 foot concrete floor. The porch will have a cinder block foundation that supports a corrugated steel sheath covered with 4 inches of concrete. Aą grubość powinien mieć poszycie faliste i czy powinna istnieć podpora pośrednia dla poszycia stalowego?

– Jon Montelin, Locust Grove, GA

John La Torre Jr., general construction contractor in Tuolumne, California, replies: Concrete is becoming a popular material for finished floors, and for good reason. Concrete is an affordable materials and decorative concrete floorscan be marked and colored for unique patterns and colors.

Porch flooring is a viable project, if you understand correctlyhow to use concrete. For example, just knowing how to order a concrete mix in summer vs winter it’s important. If you’re understanding of concrete is limited, start with some general research. Then, when you are ready, you can think about how to pour the porch floor, which as you noted, you’d do with steel decking.

The steel planking (also called pan plating) has deep ribs that guarantee the rigidity of the concrete support during casting. These ribs also strengthen hardened concrete. Steel panels, typically 3 feet wide, need to be spot welded together. I buy terrace boards from Verco Manufacturing (602-272-1347; www. werkodek. com), and their catalog contains extension and load charts.

For a 14 foot arch you can use the 16th. galvanized plating with 3 ” high and 3 ” high concrete ribs above the ribs to give a total slab depth of 6 ”. You will need temporary support during the deposit. If you take into account the fixed center support, the span will be only 7 feet and you can use the 22nd lightest. Rib bridge 2 inches high and 2 inches of concrete over the ribs.

Concrete należy zbroić siatką zgrzewaną minimum 6-6-10. I prefer to use 1/2 inch. reinforcement as it is easier to hang in the center of the concrete above the ribs. The armature can be folded against the bearing block wall to strengthen the connection.

If you want a waterproof porch flooring, you can spray the steel deck with liquid rubber (EPDM Coatings LLC; 866-311-3736;www. liquid roof. com) before pouring the concrete.

Although you can design a concrete deck using the charts in a manufacturer’s catalog, I recommend that you hire an engineer. If you’re not familiar with this kind of construction, a simple mistake (such as an insufficient connection to the house) can lead to disaster.

How to finish a large span of concrete

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