Assessment of the impact of adding fly ash and coal bottom ash to an advanced cement-based composite matrix

Abstract To reduce environmental impact and hydration heat from high cement consumption in advanced cement-based composites, this study proposes the partial substitution by fly ash (FA) coal bottom (CBA) rates of 15% mass (7.5% FA 7.5% CBA) 30% (15% CBA). Matrixes were assessed for their physical mechanical characteristics though tests compressive strength, capillary water absorption ultrasonic pulse velocity, added to analysis images generated scanning electron microscopy (SEM) energy-dispersive X-ray spectroscopy (EDS). Results indicated better performance due its particle size, shape texture, especially rate 15%. In terms mixture RFA15 yielded highest strength. The results linear with low variations about 1% 5% between 28 56 days.