A Review of the Use of Bentonite in the Production of Geopolymer Concrete

Abstract

As a result of the rapid consumption of natural materials, the use of waste and industrial waste has become very important. Geopolymer concrete is a new material that does not need the presence of Portland cement as a binder. The main focus of this research is to study the effect of bentonite clay on concrete if it is used as a binder or aggregate depending on Based on previous studies, it was found that when used as aggregate, it significantly reduces the density and produces a lightweight geopolymer concrete suitable for many construction applications. The reason is that it is a pozzolanic material, which led to its use as a binder that produced concrete with good properties. Experimental tests including workability, succulent density, compressive strength, tensile strength, flexural strength, water absorption, and ultrasonic pulse velocity were studied at 7, 28, and 56 days of age. Oven dry density and thermal conductivity were examined at the age of 28 days. The results showed that it is possible to produce high-strength; lightweight geopolymer concrete successfully used as insulated lightweight structural concrete.