Why Use Reinforced Concrete – a Quick Guide

The bond between concrete and mesh reinforcement Brisbane has worked wonders for the construction industry. The addition of steel to traditional concrete has emerged as a superb solution for making structures that are high in terms of both strength and quality. If you are planning to build a dream house or are someone involved in the construction business, then this blog post is going to help you out to understand the real benefits of using reinforced concrete.

Reinforced Concrete Properties

A good reinforced concrete stands high in terms of sustainability and quality and is structural in nature which has these properties:

  • Resistant to compression
  • Able to better combat any kind of shearing, tensile, and bending forces
  • Durable
  • Strong enough to support the load.
  • Hair cracks should be developed only within desired limits
  • A barrier to heat and sound
  • Resistant against corrosion by laying out a proper cover over the reinforcement
  • Able to be molded into preferred shape and size as per the user when taken in a fresh state
  • Enable control over the cross-sectional area

Benefits of Using Reinforced Cement Concrete

A structure that is built using reinforced concrete is highly durable and stable and is an economical option to consider as it has a minimal cost for maintenance. They also have good tensile and compressive strength and are resistant to buckling and corrosion.

Steel bar Brisbane structures are also capable of withstanding climatic changes and fire and are easily available to fit into the users’ requisite frame. They are a perfect option to consider as they are readily available and do not require any specialist expertise for its usage.

Areas of Use

Reinforced concrete is a widely used material in construction projects. Ranging from roofs to buildings and foundations, this material is used in almost every establishment. Here are a few areas in which it is found:

  • Paving carparks, airports, and other areas that witness high traffic most of the time.
  • Pre-casting electric poles and railway sleepers.
  • Structural elements, namely lintels, footings, beams, stairs, slabs, etc.
  • Weight bearing parts of structures such as bridges, water tanks, harbors, docks, bunkers, etc.

Conclusion

Reinforced concrete is an excellent material that is used for designing different buildings and structures. So now, since you know all the benefits and areas of usage of reinforced concrete, contact concrete delivery Brisbane for your buildings or construction projects.

3 Common Reasons for Concrete Cracks and What to Do About It

Concrete cracks are a very common household problem but are often misunderstood. Whenever a property owner finds a crack on their new concrete, they often assume something is wrong with the concrete or a bad quality product was used. But this is not applicable at all times. Some of the concrete cracks found are inevitable. You can hire the best concrete suppliers Brisbane to do the job of building a house but even with the best plans and designs, concrete cracks cannot be avoided.

Why Concrete Cracks?

Now you must be thinking, why do concrete cracks form? Here are the 3 most common reasons.

1. Rapid Drying of the Concrete

Once the concreting is done, the rapid drying of the wall or slab will notably increase the chance of cracking. The chemical reaction that causes the concrete to settle from the liquid state to a solid needs water. This reaction happens for several days and weeks after you pour the concrete. If it happens too quickly, cracks may appear.

2. Excess Water While Mixing

Usually concrete does not require a lot of water to achieve maximum strength. Often concrete used in residential work has too much water added to the mixture at the construction site. The more water you add the easier it is to install. But as the concrete shrinks and hardens, the water is evaporated causing a crack on the concrete wall. The wetter the concrete is the greater the shrinkage will be.

3. Lack of Control Joints

Control joints help prevent concrete cracks. The joints should be of the slab and no more than 2-3 times the thickness of the concrete.

Types of Concrete Cracks

Listed below are the 4 common types of concrete cracks:

  • Hairline crack
  • Shrinkage cracks
  • Settlement cracks
  • Structural cracks

What to Do About the Concrete Cracks?

Discussed below are some ways you can avoid concrete cracks:

  • Modify the concrete mixture: Contact premix concrete Brisbane experts for a better understanding of the ratio of the water and concrete. Be sure to choose a reputable contractor who knows the proper mixture ratio.
  • Allow more time for curing the concrete: It takes about a month for the entire curing. When waiting for the concrete to dry keep the following time in mind:
  • 24 to 48 hours, 7days (partially cured), and 28 days (fully cured).
  • Good quality concrete: Now concrete is available in different strengths and prices. It is very important to do some research before you finalise the concrete strength type with your contractor. Consult with few contractors and choose the best option suitable for you.
  • What lies below concrete: A foundation of a building is important and in the same way the soil support system beneath the concrete slab is also important. Start with a sound substrate and uniform support before pouring the concrete. You can also contact steel suppliers Brisbane for good quality products.

Bottom Line

In general, cracks can happen for a number of reasons and not always because of bad quality concrete. Cracks that are bigger than a credit card when running through the depth could be a sign of serious problems. You can consult an engineer or reinforcing mesh Brisbane expert to get the best repair solution.

Identifying the Need for Reinforcing Mesh in Concrete

As essential as construction is, it can also be a confusing field for novices. But what we all definitely know is that concrete is an essential component in almost all construction projects. This simple material allows us to create sturdy and strong buildings with ease. However, some projects have requirements that Brisbane concrete  alone cannot fulfil. This is where reinforcing mesh comes into the picture.

But what exactly is it? Who should or shouldn’t use it? Let’s take a better look.

What is reinforcing mesh?

A steel reinforcing mesh is made up of steel wires welded together in the form of a flat grid. There are many types of meshes used in construction (like carbon and fibre), though steel mesh is the most common and cost-effective. A reinforcing mesh comes in varying sizes, depending on the needs of the construction and the concrete slab size. The most common size is 150x150mm with a 4mm thickness.

A reinforcing mesh is set inside the concrete during construction. After the slab is set, the mesh inside it offers additional strength against pressure. Thus, concrete with reinforcing mesh is able to withstand much more pressure than regular concrete slabs. Contrary to popular belief, a wire mesh does not rust inside the concrete. This is because the curing of the concrete seals it completely by cutting off the oxygen that makes rusting possible. A reinforcement mesh is cost-effective on concrete prices Brisbane and prevents premature cracks in the concrete.

Another alternative to reinforcing mesh exists in the form of reinforcing bars (or rebar). Rebar is steel rods that serve the same purpose as a mesh. In most construction projects, both rebar and meshes are used together. Like the mesh, rebar also comes in variable sizes.

Who needs a reinforcing mesh?

A reinforcing mesh, while very useful, is not required in all constructions. It is important to understand where would you do and don’t need it. Most residential projects do not require a reinforcing mesh. This includes garages, pathways, and shed floors. If your driveway doesn’t see much traffic, you likely do not need a mesh either.

Larger projects that are likely to see heavy pressure need reinforcing mesh. This includes buildings, bridges, etc. Sometimes, a large project might not witness uniform pressure. In such cases, the engineers can identify the areas that need reinforcement. Some locations might just need extra reinforcement due to the age of their primary material (like old public buildings).

Even in small-scale projects, there is no one-size-fits-all solution. Sometimes, the ground below might be soft. In this case, using reinforcing mesh would stop the mini concrete from sinking. Sometimes, you just know that your small construction will be under a lot of pressure (like a garage filled with heavy vehicles). In such cases too, using a mesh is a good idea.

Conclusion

Construction is like building your dreams into reality. And we all want our dreams to be strong. Using the right steel reinforcing mesh Brisbane in the right place would help your build something that lasts a long time.

Different Proportions to Consider for Concrete Mix

As your construction project progresses smoothly, it’s quite important to consider the right concrete mix proportion. But, as the slurry gets prepared with the addition of cement, sand, and water, the ratio totally depends on the construction project. However, based on prior experience, the building codes offer standard ratios for onsite construction. If you are worried about quality, then you should opt for premix concrete in Brisbane from Reocrete. But, if you are not sure about the ratio, then you should read ahead to learn more about the proportions.

Materials used for preparing concrete

Among the basic materials, concrete always has cement as one of its constituents. While shale, limestone, and other ingredients are burnt to form clinker, the grinder grinds lump to obtain a fine powder. You may come across blended cement at some sites however, this is ideally used for masonry work, ideally for plastering. Apart from cement, aggregate and sand are also major constituents. The ingredients not only enhance structural integrity but also increase compressive strength.

Different types of proportions

  1. Nominal Mix ratios: Many years ago, the ratio of the constituents for concrete was actually based on the amount of cement and aggregate. Since this was considered a fixed ratio, such types of ratios were known as nominal. Ideally, the nominal ratio is 1:1.5:3 for M20 grade concrete and 1:2:4 for M15 concrete. To learn more about concrete prices in Brisbane contact Reocrete today!
  2. Standard Mix ratios: As the contractor may vary the nominal ratio, the overall constitution may differ to some extent. Even though the ratio may enhance strength, the cement may not be suitable for the onsite construction work. Hence, in order to maintain minimum compressive strength, concrete is based on a standard ratio. While you purchase concrete, you may come across different grades like N20, N50, N32, and N25. But, for grades more than 50, the contractor may require special class concrete for the work. Regardless of the concrete mix, every grade is different with respect to its compressive strength.
  3. Designed Mix Ratio: When dealing with a Designed Mix Ratio, an experienced professional determines the precise proportion of the constituents. Moreover, concrete suppliers in Brisbane may follow a rational approach to figure out the proportion with the unique characteristics of the materials. It’s completely normal to use standard or nominal mixes for short-duration jobs. The ratios, in this case, don’t matter when there isn’t any need to carry out control testing.

Finally, for increasing the strength of hardened concrete, it’s important to maintain the water to cement ratio; fine aggregate can be added only when the person is preparing a sticky mix.

Contact steel suppliers in Brisbane at Reocrete, if you have any questions or need any assistance deciding on the right concrete for your construction project!

How to Determine the Tensile Strength of Concrete

When a contractor plans to execute a construction project, it’s important to firstly determine the overall strength of the concrete. Due to various effects and the applied load, the structures built from concrete are prone to tensile cracking. But, on the other hand, it’s advisable to use steel reinforcing mesh Brisbane when the contractor needs to reinforce concrete slabs. So, let’s get into two different kinds of tests and the procedure of measuring the tensile strength of concrete.

1. Split-Cylinder Test

A split-cylinder test is known as a standard test, which enables the contractor to find out the tensile strength indirectly. As the expert starts off with the test, a concrete specimen dipped in water is placed between the loading surfaces of the testing machine. While the load is applied uniformly along the diameter, the testing machine is set to a range between 0.7 to 1.4 MPa/min.

It’s important to note that a plywood strip has to be placed on the lowermost plate. Moreover, the expert shouldn’t forget to place another strip above the specimen. Later, the pressure needs to be applied relentlessly until the concrete specimen starts cracking along the diameter. At this instance, the expert has to record the reading which is nothing but the breaking load. He then has to use a formula for calculating the tensile strength of the specimen. Typically, the tensile strength may lie between 1/8 and 1/12 of the compressive strength. If you’re using mini concrete Brisbane, then you should be mindful of the time for which the specimen is exposed to water.

2. Flexure Test

The flexure test is yet another test that can help you determine the tensile strength of concrete. Before proceeding with the following steps, first pour fresh concrete into the moulds to create samples. Rather than coming up with just one sample, create three specimens for the test. Keep the hardened concrete in the water at a temperature between 24 and 30 degrees Celsius for two days.

After the specimen undergoes curing, it has to be placed carefully between the loading points. After some time, a load equivalent to 2% to 6% of the ultimate load has to be applied steadily. Mesh reinforcement Brisbane is essential for concrete slabs at the construction site.

Towards the end, as soon as you calculate the loading rate, find out the modulus of rupture. This figure is nothing but the extent at which the concrete cracks when it is subjected to continuous load or pressure. Post test, set the testing machine to a configuration for cylinder testing. Also ensure you discard the specimen and clean the testing machine thoroughly.

Once you have decided on what type of concrete you need, you can find suitable tools online. If you are concerned about completing the construction project, you should contact firms dealing in concrete delivery Brisbane  such as Reocrete Brisbane.

Steps to Consider when Reinforcing Concrete Slabs with Wire Mesh

Whenever there’s a need to make concrete slabs, it’s necessary to use a welded wire mesh. While this wire mesh is an alternative to reinforced steel rods, it prevents cracking of concrete in the future. According to concrete suppliers Brisbane, it’s better to reinforce wire mesh so that it settles at an appropriate height once it has been poured. So, if you are unaware of how to reinforce concrete slabs, then read ahead to learn more about the steps.

Step 1

As soon as you start, you have to carefully place the slab runners for supporting the wire mesh. The slab runners play a better role in elevated concrete pours. With every runner being 4 feet long, you should take care of placing the runners. Ideally, you have to maintain a distance of 3 ½ feet between two consecutive runners.

Step 2

Now, you have to place the first sheet of mesh just above the slab runners. In case it’s a slab on grade, then you can place the mesh on the ground. You should start off from the corner so that you can maintain sufficient clearance. Do keep in mind that the metal should not be in contact with the edge of the poured concrete. This would certainly help because it actually prevents the chances of the exterior getting affected due to rust. If quality is the prime concern, then you can try out premix concrete Brisbane.

Step 3

Now, you need to place the next sheet right above the first sheet of wire mesh. At this instance, you have to place the wire mesh one and a half squares away, letting every sheet to overlap the other 1 ½ squares; it’s essential to apply some pressure on the second sheet and force it down. You should make sure that the second sheet is perfectly resting on the slab runners. In order to be accurate with the overlapping technique, you might have to adjust the second sheet a bit later.

Step 4

Soon after placing the wire mesh, you have to tie the sheets all at once. With the help of Linesman pliers, you have to tie the corners and tie the centre of the overlapping sheets as well. Way ahead, you need to be sure that the ties have brought two sheets closer. As you proceed with placing the wire mesh, continue tying it till the slab has been covered completely. If you wish to save money, then you could get in touch with suppliers and check out concrete prices Brisbane.

Step 5

Subsequently, you have to lift up the entire mesh at a suitable height from the slab. In case you have placed the slab runners on the ground, then you don’t have to follow this step. Moreover, you have to place 2×2 concrete bricks just beneath the wire mesh. As you work towards supporting the mesh, you should place the bricks at least at a distance of 4 feet.

Finally, before reinforcing the concrete slab, you should check whether the mesh is designed for construction projects. You should also check for the dimensions and size depending on the area that needs to be reinforced. If you don’t know what to purchase, then feel free to research online. This would give you a fair idea about the size along with the price. While you procure supreme quality steel reinforcing mesh Brisbane from the market, just be sure that the material is galvanised.

Tips for Pouring Concrete in Different Seasons

Whenever you need to pour concrete at the worksite, you need to be careful. With the site being busy with activity, you need to plan out and ensure that the concrete covers the area properly. But, with the change in the seasons across the year, pouring concrete can tend to be a big challenge. So, with this in mind, let’s go through some tips for pouring concrete during different seasons of the year.

Tips for pouring concrete during winter

  • As the winter season sets in, the outdoor temperature is likely to fall. Before you plan to pour concrete, check the weather because it is best to do it on warmer days. As you observe the weather forecast, you could schedule the task accordingly.
  • In winter, concrete is bound to freeze due to the cold surface. So, to mitigate the risk of quick cooling, you have to use heater blankets or heaters. As you prep the surface, you are then able to gain control over certain reactions.
  • Using quick-set cement is yet another tip to consider when pouring concrete. Even though this cement sets at a slow pace, it will harden quicker than traditional cement. But, on the other hand, if you wish to enhance the set time, you could mix some additives.

Tips for pouring concrete during summer

  • Just like it’s in the winter season, you may face problems in the summer season as well. Owing to the intense heat, concrete tends to set quickly. So for pouring concrete in summer, you should carry out the task early in the morning.
  • In the case that the climatic condition is unbearable, then you might think about adding some cold water to the concrete mix. This helps to maintain the temperature and keep it around 10 degrees Fahrenheit. If you want to know more about steel reinforcing rods or bars, then feel free to contact steel suppliers Brisbane.
  • If it’s necessary to pour concrete across an area under intense sunlight, then you have to cover the region. This helps in creating a better environment for the concrete to set effectively. Alternatively, you could think about spraying cold water over the area before you pour the concrete. As the surface water would be evaporating due to the heat, this tip would help you to maintain the constitution of the concrete.

Finally, whenever it starts raining, it’s advisable to use concrete mixtures made as per the standards. To avoid the concrete from getting wet, you should never forget to cover the area with plastic sheets. Ideally, you should pour concrete when it’s not raining. Try out a reinforcing mesh Brisbane in case you wish to enhance the strength of the concrete slab.

Three Major Benefits of a Reinforced Concrete Slab that you Cannot Overlook

Concrete has got excellent compressive strength. Leading experts at concrete suppliers Brisbane say that concrete slabs must be reinforced with either rebar or re-mesh. It is worth noting that concrete’s tensile strength is not that high compared to its compressive strength. It is extremely tough to crush concrete. However, it is not difficult to pull it apart. Concrete slabs offer stunning thermal comfort and long a life to any structure. Flooring that includes bars and mesh will go a long way in boosting bonding with concrete. The concrete reinforcing mesh can also bring down concrete cracking due to shrinkage.

Here are some of the major benefits of a concrete slab:

1. High compressive strength:

The presence of sand and crushed rock in concrete offers compressive power. The availability of sand and rock in concrete prove useful in supporting a huge amount of weight. It is worth noting that harder the rock and higher the rock in the mix ratio, the more powerful the compressive strength of concrete is. The usual mix ratio is four to one i.e. four portions of crushed rock and two portions of sand and one portion of cement. You may adjust the ratio to provide a higher compressive power. You can obtain high-quality concrete and other components from leading steel suppliers Brisbane.

2. Tensile strength:

Reinforced concrete slabs have become significant because it is not the compressive integrity of a slab that may fail first. It is the tensile resistance that may give way. The slabs tend to break and crack due to the poor tensile resistance of concrete. The availability of rocks and sand in concrete provides strong compressive power. All the tensile power of concrete is generated from cement. The tensile strength can be described as material’s adherence strength. However, just like glue, cement can be pulled apart; bending and torsion play the role of testing the tensile power of concrete. You must carefully obtain top quality reinforcing mesh Brisbane from renowned suppliers.

3. Durability:

A concrete slab offers a high life span with effective reinforcement. It implies that concrete must be compacted so that no gap or porous areas are left within the slab. It can also help in bringing down the risk of concrete rupturing. You can also help in enhancing the concrete slab life with effective foundation preparation and by adding an adequate amount of water. Be careful about the quantity of water as an excess amount may cause cracking and weakening of the entire slab. Take good care of the concrete installation and follow the timelines so that it achieves desired strength before any load is placed.

Conclusion:

Reinforced concrete offers several benefits. You should purchase premix concrete Brisbane from leading suppliers who promise quality. Top-quality concrete can set, harden, and secure its power at regular room temperature. The reason behind this is that cement has emerged as a low temperature bonded inorganic material.

What Concrete Should Be Used for Different Construction Projects

Are you planning to construct your new dream house? Or perhaps you want to renovate your existing home? Be it a small scale project or large-scale, choosing the right concrete material is the key to any successful project. People in the past used mortar and steel from steel suppliers Brisbane, but nowadays concrete has become the primary construction element. It is almost everywhere; roads, buildings, bridges, driveways, pools and much more.

What Concrete is Best for My Project?

This post will help you understand which concrete to select for which type of construction project.

1. Concrete Pools

Three following types of concrete can be used for constructing a pool – Shotcrete, Gunite or Cast-in-place. Shotcrete and Gunite concrete can be moulded into any shape with the use of a specialised spray, while cast-in-place concrete is a little harder to mould into a desired shape.

2. Driveways/Pathways

While using concrete for driveways and patios is obviously very common, the primary factors to consider are regarding thickness, the concrete mix, thickness of the sub-base and slope of the concrete.

3. Domestic Homes

Concrete can be used as more than infrastructure to build modern and sleek homes. Polished floors, bathrooms, concrete benchtops are some of the areas where concrete can be used to create a breathtaking structure.

Types of concrete

There are broadly the following 9 types of concrete:

1) Plain Concrete:

This type of concrete is the simplest and doesn’t require any kind of reinforcement. Usually, this concrete is ideal for use in buildings, footpaths, pavements, and those areas which don’t require high strength. Concrete prices in Brisbane vary according to the application.

2) Rapid Strength Concrete:

It acquires strength just after a few hours of its preparation which ensures quick construction of buildings and roads.

3) High-performance Concrete:

As the name suggests, high-performance concrete displays a high level of performance possessing rapid strength gain, easy placement, high permeability, high durability, and life-term mechanical properties.

4) Roller Compacted Concrete:

This type of concrete in Brisbane is placed and then road rollers are used to compact it. It provides higher density and requires less cement.

5) Reinforced Concrete:

Reinforcement basically means mixing steel rods, bars, or mesh into the concrete to improve the overall strength. Reinforced concrete finds application in the construction of columns, bridges, ceilings and any other structures like these which require a high level of strength.

6) Ready-mix Concrete:

It is ready to use obviously, but one should take care of the time required for its transportation. If there is an unexpected delay, then the concrete may harden making it pretty much useless.

7) Stamped Concrete:

Generally, interior floors and patios use stamped concrete in order to give that aesthetic look and feel. This type of concrete is used to create many realistic patterns like natural stones, granites, and tiles.

8) Vacuum Concrete:

This type of concrete contains a high proportion of water and its preparation involves suction of any excess water using a pump. This concrete achieves strength in just ten days.

9) Glass Concrete:

This is a type of modern concrete that uses recycled glass as aggregate. It is used to give an aesthetic feel to any structure for which it is used.

Reocrete is one of the best concrete suppliers in Brisbane who deliver the right grade and consistency of concrete to your worksite. The above points might confuse you slightly, but that’s okay, for any additional information, just chat with the experts at Reocrete!

What is Plastic Shrinkage Cracking?

Plastic shrinkage cracking refers to the cracks formed when concrete has not yet set. It occurs when the concrete is in the form of plastic only. The main cause behind crack formation is the rapid drying process. Cracks can be seen the next day after the finishing operations. Plastic shrinkage cracks can form randomly or can be roughly parallel to each other. Concrete Brisbane gets weak due to these cracks and therefore expand.

What Causes Plastic Shrinkage Cracks?

The basic reason behind the occurrence of cracks is the higher rate of evaporation of moisture from the surface. When the evaporation rate exceeds the moisture supplied to the concrete, cracks are formed. The concrete surface dries out because of the lack of moisture on the surface and hence it cracks.

Water is lost in the following two ways:

  1. Drying from the top: During the placement process, moisture seems to evaporate from the top surface of the concrete, which is also known as bleeding.
  2. Drying from the base: Water can get absorbed in the ground below the concrete slab. This increases the risk of cracking and also the settlement of concrete and mesh reinforcement Brisbane.

There are various environmental factors that affect the rate of evaporation from the surface of concrete, such as wind speed, temperature, and humidity. A combination of all these factors leads to cracking even in cold weather conditions. Also, the concrete mixtures which have a reduced rate of bleeding are prone to plastic shrinkage cracking. Any factor that contributes to a delay in the setting process, leads to cracking.

How to Control Plastic Shrinkage Cracking?

Mentioned below are the tips that will help you in minimising plastic shrinkage cracking in your concrete:

  • Dampen the surface of concrete frequently.
  • During hot weather, mix water with crushed ice or use chilled water.
  • Use windbreaks to reduce the velocity of wind that is coming on the surface of the concrete.
  • Use product substitutes that reduce the rate of evaporation from the surface.
  • Start the curing regime immediately after finishing.
  • Use synthetic or steel fibers to prevent cracking.
  • Accelerate the setting time of concrete.
  • Use fog sprays in dry periods to discharge a fine mist into the air. Fog sprays reduce the rate of evaporation from the surface of mini concrete Brisbane and should be used until curing is applied to the concrete.
  • Cover the concrete with moisture-retaining coverings like polyethylene or building paper sheets.

Reocrete is the leading supplier of concrete and steel reinforcing mesh in Brisbane. We deliver the right grade and consistency of concrete to your worksite at the exact time and day you need. We understand how much of a difference just a 30-minute delay in the compaction of concrete can cause. So, we practice what we preach and deliver exactly what you need!