Yemam Dinberu Molla, Kim Baek-Joong, Moon Ji-Yeon, Yi Chongku
School of Civil, Environmental and Architectural Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 02841, Korea.
Materials (Basel). 2017 Feb 28;10(3):246. doi: 10.3390/ma10030246.
The objective of this study was to investigate the potential use of sand washing waste as filler for epoxy resin mortar. The mechanical properties of four series of mortars containing epoxy binder at 10, 15, 20, and 25 wt. % mixed with sand blended with sand washing waste filler in the range of 0-20 wt. % were examined. The compressive and flexural strength increased with the increase in epoxy and filler content; however, above epoxy 20 wt. %, slight change was seen in strength due to increase in epoxy and filler content. Modulus of elasticity also linearly increased with the increase in filler content, but the use of epoxy content beyond 20 wt. % decreased the modulus of elasticity of the mortar. For epoxy content at 10 wt. %, poor bond strength lower than 0.8 MPa was observed, and adding filler at 20 wt. % adversely affected the bond strength, in contrast to the mortars containing epoxy at 15, 20, 25 wt. %. The results indicate that the sand washing waste can be used as potential filler for epoxy resin mortar to obtain better mechanical properties by adding the optimum level of sand washing waste filler.
本研究的目的是探讨洗砂废料作为环氧树脂砂浆填料的潜在用途。对四组含有环氧树脂粘结剂（含量分别为10%、15%、20%和25%（重量））且与洗砂废料填料混合比例在0 - 20%（重量）范围内的砂混合而成的砂浆的力学性能进行了检测。抗压强度和抗折强度随着环氧树脂和填料含量的增加而提高；然而，当环氧树脂含量超过20%（重量）时，由于环氧树脂和填料含量的增加，强度变化不大。弹性模量也随着填料含量的增加而呈线性增加，但当环氧树脂含量超过20%（重量）时，砂浆的弹性模量会降低。对于环氧树脂含量为10%（重量）的情况，观察到粘结强度较差，低于0.8MPa，与环氧树脂含量为15%、20%、25%（重量）的砂浆相比，添加20%（重量）的填料会对粘结强度产生不利影响。结果表明，通过添加最佳水平的洗砂废料填料，洗砂废料可作为环氧树脂砂浆的潜在填料以获得更好的力学性能。
