Characteristic of Polymeric Lightweight Aggregate with Coal Fly Ash and Epoxy Resin for Manufacturing the Lightweight Concrete

Concrete is an essential element and widely used in various industrial construction works. However, concrete weak its specific gravity range of 2200 – 2500 kg/m3. Using lightweight aggregates one way to reduce the weight concrete. In Indonesia, availability coal fly-ash (CFA) easy obtain abundant, while utilization rate still low. To overcome this problem, CFA mixed with epoxy resin (ER) as a binder manufacture polymer (PLA). The manufacturing process uses simple mixing method using three different compositions. ratio composition proposed study are 90:10 (PLA_90:10), 80:20 (PLA_80:20), 70:30 (PLA_70:30). From results testing compressive strength aggregate compositions, it was found that PLA_70:30 had 74.60 MPa 1668 kg/m3 at age 28 days. microstructure shown by scanning electron microscope (SEM) photo each composition. greater on aggregate, better bond between particles. improperly bound becomes more fragile when there less used. Furthermore, which has become crushed inserted into mixture design quality f'c = 17.5 MPa, following requirements for quality. result 18.38 days, varies 1918.87 - 1928.93 According ASTM, tests show meets standards specified structural