The effect of pressure strength of porous concrete on the addition of natural pahae zeolite as a partial replacement of cement

Abstract

Innovations regarding the manufacture of porous concrete continue to develop in Indonesia. One of the innovations in making concrete in this research is adding natural pahae zeolite originating from North Tapanuli as a partial replacement for cement in porous concrete. Porous concrete is made of 15x15x15 cm, which refers to the ACI 522R-10 method with a compressive strength test age of 7 days. Variations in the thigh natural pahae zeolite composition for reducing cement are 0%, 10%, and 20%. The compressive strength test of porous concrete showed increased values after adding thigh natural pahae zeolite. The highest increase in sample value was found with the addition of 10% of natural pahae zeolite, with a percentage increase in test results of 25.76%.