Concrete is a mixture of cement, water, sand and broken
stones (jelly) in a definite proportion, which is a workable mass initially and
hardens over a period of time (Puttaswamy, 2012). Concrete mixtures are made up
of sand, cement, and aggregates such as gravel, which are mainly used in
construction industry, especially for housing and other commercial buildings.
One researcher emphasized that the low-strength mixture has strength of 15 Mpa
or about 2000 psi and it is suitable for house foundations that are not
reinforced, and for walls (SANS, 2017). The concrete with plastics as
aggregates is expected to become lighter, yet less expensive and the quality is
marginally like the commercialized concrete. Since the concrete is cheaper, it may
help construction workers on their budget, but still, with effective outcome. With
the use of lightweight concretes, the infrastructures that are being built can
become innovative because of the recycled materials used and at the same time,
helps the environment in reducing wastes.