Abstract

The use of glass powder instead of cement as an auxiliary cementitious material can better alleviate environmental problems and energy problems. This experiment studies the influence of the fineness of glass powder and the substitution rate on the performance of mortar, to guide the actual project. The study found that with the increase of the substitution rate, the initial setting time becomes longer, the finer the fineness, the longer the initial setting time, but the difference between P-60 and P-90 decreases with the increase of the substitution rate. With the increase of substitution rate, the compressive strength of 7, 28 and 90 d increased first and then decreased. When the substitution rate was 5%, the compressive strength reached the maximum, but the 7 d compressive strength of P-30 with 5% substitution rate decreased slightly. With the increase of substitution rate, the cumulative hydration heat decreased gradually. The difference between P-60 and P-90 was not significant. Similar to the cumulative hydration heat, the hydration heat flow per gram of cement decreased gradually with the increase of substitution rate. It can be seen from nanoindentation that fineness and substitution rate have little effect on the properties of hydration products. With the increase of substitution rate, the total porosity decreases first and then increases. The porosity of glass powder mixed with P-30 is the largest, followed by P-60 and P-90, but the difference between the total porosity of P-60 and P-90 is not significant. In practical engineering, these two factors need to be considered in combination.

中文翻译：

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玻璃粉细度和替代率对水泥基材料微观性能影响的研究

摘要

使用玻璃粉代替水泥作为辅助胶凝材料可以更好地缓解环境问题和能源问题。本实验研究玻璃粉细度和替代率对砂浆性能的影响，以指导实际工程。研究发现，随着替代率的增加，初凝时间变长，细度越细，初凝时间越长，但P-60与P-90的差异随着替代率的增加而减小。随着取代率的增加，7、28和90 d的抗压强度先增加后下降。当取代率为5%时，抗压强度达到最大值，但5%取代率的P-30的7 d抗压强度略有下降。随着取代率的增加，累积水化热逐渐下降。P-60 和 P-90 之间的差异不显着。与累积水化热类似，每克水泥的水化热流量随着替代率的增加而逐渐降低。从纳米压痕可以看出，细度和取代率对水化产物的性能影响不大。随着取代率的增加，总孔隙率先减小后增大。掺入P-30的玻璃粉孔隙率最大，其次是P-60和P-90，但P-60和P-90的总孔隙率差异并不显着。在实际工程中，需要结合考虑这两个因素。