Serapan dan penetrasi beton normal dengan bahan tambah metakaolin dan serat aluminium

Oleh :
Munika Nurma Yulita - I0106103 - Fak. Teknik

One of factor which really influential to concrete duration is a number of water flowing to inside concrete (permeation). Materially therefore needs to be done that concrete that is utilized quite a waterproof. One of effort which is done in this research is with add admixture on concrete (concrete admixture) which is metakaolin and aluminium fiber. This research uses experiment method in laboratory by makes cylinder object diameter 7,5 cm and high 15 cm. Then absorption and penetration test are done. On absorption test, the object been soaked 10,5 minutes and 1 x 24 hour then the object are made in a SSD condition then the object is weighed and than the difference among SSD'S weight heavily oven-dried so get how big been known concrete water absorption. On penetration test did by gives water pressure 1 kg / cm³ up to 48 hours, 3 kg / cm³ up to 24 hours, and 7 kg / cm³ up to 24 hours, then that object given by pipe already being filled by water and recorded decreasing which happens up to 1 hour. The object afterwards is clefted and recorded water spread diameter and penetration thickness is happened. From examination result is known that water absorption and penetration point increases along aluminium fiber increase. This is because of increasing aluminium fiber on concrete causes arising pore in interface zone (transitional zone) among fiber with cement paste. This pore is arised because there are a number of fiber therefore water can cling / leave on fiber surfaces that don't most compact by vibrator perfectly.