PENGUJIAN MODULUS ELASTISITAS PAVING BLOCK DENGAN VARIASI CAMPURAN PASIR DAN SEMEN MENGGUNAKAN SONIC WAVE ANALYZER (SOWAN)

Abstract

Research on testing elasticity of paving blocks has been done to determine the value of modulus elasticity using a sonic wave analyzer (SOWAN). The sample were shaped using a PVC pipe with 1.5 inch in diameter and 10 cm of length and then dried for 28 days. There were five samples in this research with different sand-cement ratios, after that the wave propagation times for each sample were measured and the speed of sound wave in the samples was calculated. The research results showed that the largest modulus of elasticity was obtained by sand-cement of (1:1) i.e 39.87 N/m2 with primary wave speed of 1.45 x103 m/s, secondary wave speed of 1.20 m/s and value of compressive strength of 22.37 N/m2. The sample with a value of modulus elasticity the lowest was 9.86 N/m2 with primary wave speed of 1.03x103 m/s, secondary wave speed of 0.87 x103 m/s and compressive strength as much as 7.23 x106 N/m2.