Monday 30 October 2017

Using Deformed Reinforcing Steel Bar

Deformed reinforcing bar is used in a range of residential, commercial and infrastructure applications from concrete slabs to prefabricated beams, columns, cages and precast products. Deformed reinforcing bar complies with all relevant standards. 

Reinforcing steel and bar is also known as reo mesh, rebar, re-bar or reo bar. It is used to strengthen concrete because of its poor tensile strength. The presence of deformed bar is key to help concrete to adhere to a bar’s surface. In most cases around Perth and Western Australia, an engineer is commissioned early on to specify what mesh and bar are required for retaining walls, footings, slabs or suspended slabs. Read on…

Deformed bar is a Class N (normal ductility) reinforcing bar used in a range of applications from reinforced concrete slabs to prefabricated beams, columns, cages and precast products. Also known as rebar, deformed bar complies with AS/NZS 4671 : 2001 Steel reinforcing materials and is available in 500 MPa from 10 mm – 40 mm bar diameters. Always consult with an engineer before choosing the bar suited for your application. Find out more

The deformed Reinforcing Steel Bar is supplied in length of 9m or 12 m as common sizes. The steel bar diameter applied is different and accordingly the weight varies.

A steel reinforcing bar which is manufactured with surface deformations to provide a locking anchorage with surrounding concrete. Reinforced concrete is a material that is very strong in compression, but virtually without strength in tension. To compensate for this imbalance in a concrete slab’s behavior, reinforcement bar (also known as rebar) is cast into it to carry the tensile loads. Deformed Bar was previously called Y-Bar eg: Y12, Y16 but through product improvements the tempcore strength was increased (now 500Mpa) and is now denoted as N-Bar. Refer here.

In reinforced concrete design it is generally assumed that the strain in the steel reinforcement is equal to the strain in the concrete immediately surrounding it. This is substantially true in zones of compression but, in the parts subject to tension, the working stress in the steel is usually high enough for the strain to be more than the surrounding concrete can withstand without cracking. The size of the cracks formed in this way and their spacing along the reinforcement depends primarily on the bond but is also affected by the strain in the steel, the tensile strength of the concrete and its modulus of elasticity. 

Reinforced concrete was designed on the principle that steel and concrete act together in resisting force. Concrete is strong in compression but weak in tension. The tensile strength is generally rated about 10 percent of the compression strength. For this reason, concrete works well for columns and posts that are compression members in a structure. But, when it is used for tension members, such as beams, girders, foundation walls, or floors, concrete must be reinforced to attain the necessary tension strength.

Steel is the best material for reinforcing concrete because the properties of expansion for both steel and concrete are considered to be approximate] y the same; that is, under normal conditions, they will expand and contract at an almost equal rate.

Another reason steel works well as a reinforcement for concrete is because it bonds well with concrete. This bond strength is proportional to the contact surface of the steel to the concrete. In other words, the greater the surface of steel exposed to the adherence of concrete, the stronger the bond. A deformed reinforcing bar adheres better than a plain, round, or square one because it has a greater bearing surface. In fact, when plain bars of the same diameter are used instead of deformed bars, approximately 40 percent more bars must be used.

The rougher the surface of the steel, the better it adheres to concrete. Thus steel with a light, firm layer of rust is superior to clean steel; however, steel with loose or scaly rust is inferior. Loose or scaly rust can be removed from the steel by rubbing the steel with burlap or similar material. This action leaves only the firm layer of rust on the steel to adhere to the concrete.

 

The post Using Deformed Reinforcing Steel Bar appeared first on AAA Concreting.

Sunday 29 October 2017

Building Concrete Precast Homes

Modern technology has indeed taken over the world. Many things have changed into better states. However, homes are still being built in much the same way as they have been before. Homes that are made of concrete are still the normal ones. Concrete homes have stood the test of time against different weather conditions which is why concrete is considered one of the sturdiest building materials in the world. While concrete homes are very popular in Australia, they are finally catching on in the USA. Read more here for concrete contractors in Austin, TX who can assist you with building a concrete home.

Materials and equipment for construction have certainly improved over the years. Every property owner has already higher expectations and requirements when it comes to building homes.

Now, however, concrete is being re-discovered as architects and designers are using the material in increasingly varied and surprising ways. It can be textured and its tone played with and altered. It can be shaped and moulded into furniture like a kitchen bench or vanity, customised in situ or poured into a precast framework off-site. It can be used in its familiar monolithic state or small-scale and discreet. Read on.

Concrete precast homes provide a tight thermal building envelope which can reduce a home owner’s heating and cooling bills. The use of steel reinforced concrete panels make for a rock solid durable living environment. You can be at peace knowing that you are in a safe and secure home which far exceeds the performance levels of conventional building systems.

Panel Homes offer increased thermal and acoustical mass, reduces construction waste and the design makes them straight and true. Because Panel Homes are precast in a clean factory environment, the finish is of the highest quality.

Minor variations in finish between design intent or specification and the actual outcome are common. Assessment of samples and prototypes is highly advisable. Established, professional precast companies usually deliver quality assured finishes to the standard specified. Find out some details here.

With insulated concrete walls, a home can be a place of thermal comfort and living for your family. The weight of the concrete can reduce the amount of noise entering the house by a considerable amount. Adding insulated concrete walls will greatly affect you and your family’s lifestyle.

Typically, a standard house can be built within week, as long as modern equipments are used. The construction becomes very precise if the wall panels are factory manufactured. The energy costs to heat and cool the home are significantly lower with the thermal mass properties of concrete. This in turn will provide strength to the walls that can resist external forces like earthquakes, bushfires, and other natural calamities.

Precast Concrete Homes are environmentally friendly homes. They require less energy to heat and cool and they create less waste during the building process when compared to brick veneer. Their superior durability also gives them a much longer useful lifespan allowing the carbon footprint of their construction to be repaid over time.

Precast concrete is available in a variety of shapes, textures, colours, and finishes. It is highly malleable so it can be shaped to suit any form or design. Structural precast concrete panels are durable, strong and versatile building material. They suit perfectly to the country’s harsh weather conditions. They are also low-maintenance and can be designed to meet the needs of domestic construction.

Further information

Concrete is more advantageous that other building materials. It is fire and flood resistant and does not rot or distort. It even gains strength and durability as it ages.

The post Building Concrete Precast Homes appeared first on AAA Concreting.

Friday 27 October 2017

Using Overlays for Concrete Resurfacing

There are many concrete companies today that offer complete and extensive line of systems for decorative concrete driveways and overlays. The selection in concrete driveway finishes has already expanded. It is no longer limited to spray on paving, exposed aggregate and stenciled concrete. Concrete professionals would definitely prefer concrete paving products for driveways and overlays.

There is no need for you to completely deconstruct your old concrete to create a new and fresh design. Modern concrete paths, floors, and driveways can be resurfaced without the need for removing the old one. This saves you a great deal of time and money.

Concrete resurfacing is a great way to revitalise old looking concrete and make it fresh again. It’s also a practical and economical way to increase the livability of your home and improve its value. Refer from the main source.

Concrete driveways are not that costly to construct. In fact, concrete material is a lot cheaper than flagstone, brick, slate, and other natural materials. Concrete can also be customized unlike asphalt or pavers.

Stamped concrete driveways can take the texture and appearance of slate, sandstone, cobblestone, ceramic tile and even wood. These unique and enduring concrete finishes not only add real curb appeal and value to your home, they are also durable and can last the lifetime of the substrate.

Selecting the most appropriate resurfacing system often involves weighing performance attributes against aesthetic value. These will involve a couple of questions to ask.

Does the concrete have a lot of cracks or gouges? Is the surface out of level? If so, choose a higher-build material, such as a self-levelling overlay that can be applied at a thickness of 1/4 inch or greater. Unless the surface imperfections are expertly patched or filled, they could telegraph through a thinner overlay, such as a micro-topping or skim coat. Too much moisture in the concrete substrate can also be a problem for some overlay systems, especially products that restrict the ability of the concrete to “breathe” or release moisture vapour as needed. There are simple tests that you can perform to check the moisture vapour emission rate of concrete. If it’s too high, be sure to use a permeable overlay system that will permit the moisture vapour to escape.

Be sure the topping or overlay system is tough enough to withstand all the conditions it will confront. Are the slab outdoors subject to weather extremes and freezing and thawing? Is it a floor surface in a high-traffic area or subject to chemical, grease, and oil spills? Although most systems will stand up well to wear, chemical attack, and dirt penetration when properly installed and sealed, some are better suited than others for harsher exposure conditions. Often a higher-build material or a material containing aggregates will perform better in aggressive environments.

Coloured concrete is the type among the decorative concretes used to turn interior and exterior surfaces to impart their exceptional beauty. As a homeowner, every human want to get the best to enhance the beauty of his house. Refer from here.

One of the main reasons to use an overlay system is to improve the appearance of concrete. Create a pattern, colour, and texture as desired for your new surface. By using the appropriate product, you can get your desired outcome, or even better. Consult with the overlay manufacturer and your installer for expert advice. It is advisable to ask for sample finishes and colour selections first so that you could have an idea on what to create.

Larger cracks on the concrete may need to be repaired first before any resurfacing. Minor cracks can be covered during the process so there is no need for actual repair. An epoxy and silica sand mix may actually do the trick in repairing medium to large-sized cracks. Structural damages in in the concrete will need intensive repair. Cracks may still re-occur even with proper resurfacing.

Resurfacing is the most practical method in improving the looks of your concrete. You can do it by yourself but for large projects, it is better carried out by professionals.

The post Using Overlays for Concrete Resurfacing appeared first on AAA Concreting.

Thursday 26 October 2017

How to Maintain Your Concrete Driveway

One of the best materials used for constructing driveways is concrete. It is most probably the toughest material on the market today. However, there are still ways to make sure that it would last for a long period of time. Concrete cleaning and sealer application are just some of the things that you could do to maintain the durability of the concrete.

There is always a need for regular maintenance in a concrete driveway that is usually used. In fact, whether it is concrete or not, driveways of any paving material require maintenance.

Here are a few of the things that you could do in order to keep your concrete driveway clean and sturdy.

Concrete cleaning

Cleaning the concrete is the simplest form of maintenance that you can do regularly. You should treat concrete in the same way as other surfaces. Simply use specialist products that are designed for concrete to obtain the best results.

If you own a huge driveway, cleaning it on your own can become quite tedious. It is highly recommended to hire a concrete scrubber instead. It will save you a lot of time and you are guaranteed to have your driveway looking good as new.

Apply sealer

After cleaning the surface of the driveway, it is now time to apply a layer of sealant. It is advisable to do it every two years in order to keep your concrete looking perfect.

Unlike stencilled or stamped concrete plain grey concrete has no colour to protect. On the other hand stencilled, stamped or coloured concrete needs a barrier between it and your car or foot traffic and a couple of coats of decorative sealer will do the trick. If you don’t maintain your patterned driveway with sealer the chances are that eventually the colour will wear off in patches and will need open heart surgery to make it look good again. Read more here.

The kind of sealer that you use will greatly determine the outcome of the sealing process. Some sealers can protect your concrete from water and salt. You should choose a product that would work well on your concrete. Check this out.

In the event that oil spillages are your main concern, you might want to take a closer look at high-performance epoxy or urethane sealers.

Remove stains immediately

If there are visible stains on your concrete, you should try to remove them immediately. Leaving stains to dry can lead to damaging results. A stain can become permanent if left neglected for several days. You might not be able to remove permanent stains anymore so it is always a must to tackle them as soon as possible.

Everyday cleaning products might not be enough to tackle concrete stains.

You can refresh your old driveway just by cleaning and painting it. You can make the job easier by learning a few techniques to do the job properly. Learn more here.

There are different ways in how you can perform these tasks. You can use an oven cleaner that contains chemicals that can remove grease and grime. After application, leave it for around ten minutes before brushing.

For large areas of discolouration or stains, you may need to use proper concrete cleaning products. Alternative products are only effective for minor stains.

The post How to Maintain Your Concrete Driveway appeared first on AAA Concreting.

Thursday 5 October 2017

Uses of Stamped Concrete

A concrete with patterns or texture that resembles different materials, such as bricks, tiles, stones, and slates, is commonly termed as stamped concrete. It is typically used for sidewalks, patios, driveways, and interior flooring. Many people choose to utilize stamped concrete because it is a lot cheaper than the real tiles and bricks. It offers the same durability as the authentic materials but costs less.

Stamped concrete from AAA Concreting is created different with the standard concrete. Its procedures are more complex compared to the normal concrete mixing. Creating a base colour, adding an accent colour, and stamping a pattern are some of the main procedures of stamped concrete mixing. These three steps will produce a concrete that has a shape and texture that are similar to the authentic building material. Proper mixture would result to significant resemblance in terms of physical appearance. 

There are a lot of design options to choose from if you are planning on utilizing stamped concrete to your property. It can take the form of different shapes, textures, and patterns so you can get a lot of ideas for your home renovation. You can start with a clean slate and then get a wide range of options in creating a more modern finish for your home. Commercial establishments may also utilize stamped concrete instead of the authentic materials to cut down expenses. Stamped concrete is highly customizable so it can be used almost anywhere. There are several manufacturers of stamped concrete nowadays. Visit this post for further readings.

Stamped concrete is very ideal for improving the beauty of pool decks, courtyards, parking lots, and patios. It is the perfect material for outdoor pavements.

Because of the fact that stamped concrete is highly flexible in terms of appearance, many homeowners are starting to utilize stamped concrete in their home. It is becoming a trend in the country. Another advantage of stamped concrete over other construction materials is its price. Modern imprinted concrete typically costs a lot cheaper than the materials it substitutes for.

Stamped concrete also provides a more decorative appeal to your property. Rather than using one-coloured bricks or tiles, you can create an interesting pattern using a group of stamped concrete. Many homeowners highly recommend this building material, especially for first-time homeowners. For more information, check out http://ift.tt/2yYjBr9.

How to use stamped concrete?

  1. Pathways or walkways
  2. Entrance of doors
  3. Pool sides
  4. Patio
  5. Firepit
  6. Countertops
  7. Backyard
  8. Driveways
  9. Porch
  10. Brick designs

Your driveway is usually the most noticed part of your property. Many people would make an impression about you just by seeing the design of your driveway. If you are utilizing a concrete driveway, you might not get too much attraction from your neighbours and passersby. You might need to consider resurfacing your driveway with decorative concrete. It will certainly leave your neighbours in awe as to how you made your driveway more stylish than before.

Stamped concrete is normally used outdoors. However, some homeowners choose to have their interior flooring surfaced with stamped concrete. A concrete that is patterned very similarly with tiles can look like the authentic material. Customizing your home with decorative concrete may also potentially increase the market value of your property. Learn more here.

It is a viable investment to resurface some parts of your property with stamped concrete. You can improve the overall design of your house without the need to spend too much cash. You can try getting some ideas for the concrete design in restaurants, commercial buildings, and your neighbours. You can also browse online for sample designs of stamped concrete. The trendy designs might suit your current home exterior design.

The post Uses of Stamped Concrete appeared first on AAA Concreting.