As such, it can be used to successfully build bridges, decks, girders, piers, precast constructions, and high rise buildings with reduced density. LWC is thus ideal for constructing additional flooring on top of older or even newer structures, as it reduces the risk of collapse. This shows how LWC can be used to build formidable structures, especially since the possibility of dead load being transferred from one floor to the next is greatly reduced. One of the most popular structures built with lightweight concrete is the Bank of America Building in Charlotte, N.C. Practical Applications of Lightweight Concrete Hence, LWC remains a cost effective construction material, especially for larger projects. However, projects made with normal concrete require additional material for framing, cladding, and steel reinforcements – ultimately increasing the overall cost. As a result, many believe normal concrete to be cheaper compared to LWC.

The use of porous aggregates increases the time it takes to dry hence, to offset this problem, aggregates are pre-soaked in water before being added into the cement.Īs mentioned earlier, normal concrete can weigh between 140 to 150 Lbs/ft³ due to the presence of denser aggregates in their natural state. In contrast to traditional concrete, lightweight concrete has higher water content. Differences between Normal and Lightweight Concrete

However, this may compromise the density of the mixture as it requires the addition of more pozzolans and water-reducing admixtures to the concrete. Nevertheless, a higher compressive strength of 7000 to 10,000 psi can be attained with lightweight concrete. It is being increasingly used to build sleek foundations, and has emerged as a viable alternative to regular concrete. This makes lightweight concrete ideal for building modern structures that require minimal cross sections in the foundation. Structural lightweight concrete has an in-place density of 90 to 115 lb/ft³, whereas the density of regular weight concrete ranges from 140 to 150 lb/ft³. Lightweight concrete is a mixture made with lightweight coarse aggregates such as shale, clay, or slate, which give it its characteristic low density.

Concrete pea shooter