Kuat tekan, density, absorpsi dan modulus elastisitas mortar campuran semen, abu sekam padi dan precious slag ball dengan perbandingan 30%:25%:45% = Compressive strength, density, absorption and modulus of elasticity mortar mixed cement, rise husk ash adn precious slag ball with comparison 30%:25%:45% - Paksi Aan Syuryadi, author (2011)