Properties of ConcreteThe desirable properties of concrete are plasticity, workablity, nonsegregated, and uniformity. Plasticity - This refers to the ability of the concrete to be readily molded, yet change its shape slowly if the mold is removed. The degree of the plasticity influences the quality of the finished product. Workability - This refers to the ease or difficulty of placing concrete in the form. A well-porportioned and workable mix will gradually slump to lower elevations and retain its original identity. A poor mix will crumble, segregate and fall apart. Nonsegregated - Concrete should be handled so that there is a minimum to segregation and the mix will remain homogeneous. For example, it is best to not allow concrete to free fall more than 5 feet so that the concrete will remain homogeneous. Uniformity - Every batch of concrete should have the right "ingredients" (gravel, sand, cement and water) in the right proportion. When concrete is uniform, it will stay strong upon curing. Once the concrete is hardened and finished, it should be strong, durable and water-tight. Strength - This is the ability of the concrete to resist weight, compression and flexing. The strength is increased by using less water in the mix. Durability - This is the ability of the concrete to resist the elements such as wind, frost, snow, ice, and chemicals (such as salts to get rid of ice in the winter). As the water-cement ratio is increased in the concrete mix, the durability will decrease. Air-entraining agents (an additive the concrete supplier or you can add to the mix) improve the durability of the concrete. Water-Tightness - It is essential to have concrete that is water-tight. Air-entraining agents also help the concrete to be more water-tight. Return from Properties of Concrete to Calculating Concrete New! CommentsHave your say about what you just read! Leave me a comment in the box below. |
