Abstract

This study aims to test the durability (resistance) of fibrous fibrous concrete. The volume of fiber added in the mortar is 0.5% and 1% of the total volume of the concrete mix. The main steps taken in the manufacture of test specimens are as follows: In accordance with the comparison of concrete stacking materials based on calculations using guidelines by Public Works standards. The fiber is sprinkled evenly into the concrete mixer which in it has been mixed with regular concrete first. The sowing of the fibers is done by hand and carefully so that each fiber can enter into the mortar individually. Thus, no unexpected fiber clumping is expected. Slump testing was performed and the results were recorded. The mixture of concrete mixed on the stirrer (molen) was poured on a cylindrical concrete mold measuring 15 cm in diameter and 30 cm in height for a compressive strength test and a beam measuring 15 cm X 15 cm X 51 cm for collapse modulus test. After the concrete hardened 24 hours the mold is then opened and done soaking immersion of concrete in normal water, sea water and water with sulfuric acid levels. After enough concrete age (2 months) then the concrete is ready to be tested. As standard reference used normal concrete on fresh water immersion obtained compressive strength equal to 26,89 MPa and modulus collapsed equal to 4,67 MPa. The results of the research showed that the compressive strength of both freshwater, seawater and sulfuric acid water was highest in 1% fiber concrete and 53.7%, 36.15% and 3.53% respectively of the normal concrete compressive strength in immersion freshwater. While the highest collapse modulus on 1% fiber concrete is good on fresh water immersion, seawater and sulfuric acid water. In fresh water immersion increased by 0.95%, but at sea water and sulfuric acid degradation decreased 1.28% and 12.42% respectively to the normal concrete collapse modulus in freshwater immersion.

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