TY - JOUR AU - ปิยะพิพัฒน์, สุธี PY - 2016/12/30 Y2 - 2024/03/29 TI - Relationship of Shear Strength with Modulus of Rupture for Soft Clay mixed by Cement and Sand JF - Journal of Engineering, RMUTT JA - j.eng.rmutt VL - 14 IS - 2 SE - Research Articles DO - UR - https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242013 SP - 45-54 AB - <p>The effect of sand mixed with soil cement has been investigated by laboratory tests as the unconfined compression test, the consolidated-undrained test and the third-point loading test. The soil sample is Bangkok clay and the sand used is Kanjanaburi sand, passing through sieve No. 4 but retained on sieve No. 10. The cement used is a portland cement type 1. For the procedures of specimen preparation, firstly the clay sample was mixed by sand of 0, 20 and 40% by dry weight of clay respectively. Then the aggregate as clay-sand mixer was mixed with cement of 10, 15 and 20% by dry weight. The water content of aggregate was adjusted to higher than the liquid limit of aggregate about 5%. Then the aggregate was mixed by cement and put it into 2 kinds of mould as 1) the cylinder mould with a diameter of 3.5 cm and a high of 7 cm for the unconfined compression test and the CU test and 2) the beam mould with the size of 7.5´7.5´35 cm<sup>3</sup>&nbsp;for the third point loading test. The curing day used is 28 days. As results, the higher amount of sand, the higher unconfined compressive strength (q<sub>u</sub>), angle of internal friction and modulus of rupture. The relationships among the results of 3 types of testing with the quantity of sand mixed were demonstrated.</p> ER -