ABSTRACT

In this paper, the effect of rice husk ash (RHA), as silicate impurities, on the microstructure and mechanical properties of calcium aluminate cement concrete (CACC) is explored. Various mechanical tests, including tests for obtaining the compressive, splitting tensile, flexural strengths and elastic modulus, were performed on different mixture designs containing different volume percentages of RHA (0, 2.5, 5, 7.5, and 10%) at W/Cs of 0.4 and 0.5. Furthermore, the impact of RHA on the microstructure of this concrete was examined through careful analysis of the scanning electron microscope (SEM) images and energy dispersive X-ray spectroscopy (EDS) results. The results demonstrate that, At W/C of 0.5, the microstructure and mechanical properties were improved, with the greatest improvement for the RHA substitution percentage of 5%. However, at W/C of 0.4, the addition of RHA showed no positive effect, which can be attributed to a higher specific surface area of RHA than cement.

摘要

本文研究了稻壳灰（RHA）作为硅酸盐杂质对铝酸钙水泥混凝土（CACC）的微观结构和力学性能的影响。在包含W / Cs时具有不同体积百分比的RHA（0、2.5、5、7.5和10％）的不同混合物设计中，进行了各种机械测试，包括获得压缩，断裂拉伸，弯曲强度和弹性模量的测试。 0.4和0.5。此外，通过仔细分析扫描电子显微镜（SEM）图像和能量色散X射线光谱（EDS）结果，检查了RHA对混凝土微观结构的影响。结果表明，在W / C为0.5时，显微组织和力学性能得到改善，RHA取代百分比为5％时改善最大。然而，