PENGARUH PENAMBAHAN SERAT ALAMI ECENG GONDOK TERHADAP KUAT TEKAN BETON BERKUALITAS RENDAH

Abstract

This research will be conducted in accordance with Indonesian Standard SK SNI and foreign standard ASTM. The test object consists of a cylindrical test with the diameter of 15 cm and a height of 30 cm, and it is developed to 4 mixture variations with the amount of 2%, 4%, 6%, 8%, of total cement. The mechanical properties of concrete is being tested include concrete compressive strength. Itis tested at the age of 7 days, and then converted at 28 days, using test objects mixed with different fiber variations. The results of the test are: compressive strength test with 2% variation is 7,54MPa, compressive strength testwith 4% variation is 6,74 Mpa, compressive strength with 6% variation is 4,58 Mpa, compressive strength with 8% variation is 3.63 MPa. Maximum concrete compressive strength occurs in 2% fiber  mixture, while the minimum concrete compressive strength occurs in 8%. From these results, it can be concluded that the addition of water hyacinth fiber to the mixture for low quality concrete has not been able to increase its compressive strength.Keywords: Fiber, Water Hyacinth, Concrete Compressive Strength.