Penambahan Limbah Abu Batu Bara Pada Batako Ditinjau Terhadap Kuat Tekan Dan Serapan Air (original) (raw)

The increase of compression strength of hollow block can be conducted with addition cooal waste with ash fly. This research use mixture composition with comparison of materials compile hollow block which consist of pozolan portland cement, fly ash and sand. The comparison with composition fly ash equal to 0 is% ( normal), 10%, 20%, 30%, 40%, 70% to cement weight. Sampel in the form of hollow block of the size 40 x cm 10 x cm 20 cm. Sampel in the form of batako of the size 40 x cm 10 x cm 20 cm. Experiment of various ratio of cement, sand and fly ash to make hollow block showed that subtitution of cement with fly ash 10 to 30 percent increased hollow block strength to 4,5 to 19,8 percent, while at addition fly ash to exceed 30% strength hollow block down progressively. Addition fly ash at pozolan portland cement make hollow bock become more waterproof because absorption value irrigate batako become lower progressively. Absorption at hollow block with fly ash 0% is equal to 12,55%,...