Concrete ’s able to be a nonstructure wali. Perlite and fly ash addition in concrete produce more than 70 kg/cm2 gross pressure t es t. That is a concrete with composition 25% Portland cernent, 45% sand, 20% perlit and 10% fly ash has 79,36 kg/cm2 average gross pressure tes t. Another concrete with 20% Portland cernent, 45% sand, 20% perlite, 15% fly ash make 81,32 kg/cm2 on average gross pre…