Exploitation of materials, especially the use of stones as themain component of concrete needs to be reduced. The existence of analternative to coral replacement as a coarse aggregate in a concretemixture needs to be applied. This research was conducted to find theoptimum percentage value of the addition of woven bamboo fiber as asubstitute of coarse aggregate to achieve the minimum compressivestrength according to standard mix design paving block. Thepercentage of absorption (absorption) is also observed, so that laterproduced paving with bamboo fiber which has a compressive strengthand absorption as well. This research use trial and error method,sample to be tested in the form of cube with size 15 x 15 x 15 cm asmany as 20 pieces with paving quality which is planned is K-225 or18,675 MPa. The percentage substitution ratio was derived from thevolume of the crude stone acting as a crude aggregate on the pavingblock mixture. Prior to its creation, several stages such as testing thematerial characteristics are performed. After that the test object ismade and tested at the age of 28 days. The method of makingspecimens is included in semi-mechanical using concrete mixer.Bamboo waste fiber is installed horizontally by layer by layer. Thetest results show the average compressive strength of bamboo fibervariation of 0%, 5%, 15% and 25% respectively by 20.7 MPa, 17.6MPa, 12.3 MPa and 9.9 MPa. From the result, it was found that thepercentage of bamboo woven fiber fiber is optimum in accordancewith the minimum standard limit of 17 MPa paving block by 7%.While the results of the absorption test in the sample showed aproportional increase with the percentage of woven bamboo fibervariation added, with an average absorption rate of 0.1%, 0.1%, 0.2%and 0,3%, while the optimum absorption is equal to 0,103%.Keywords: Absorption, Compressive strength, Paving block, Waste wovenbamboo fiber
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