Abstract

This paper aims to experimentally study the impact of waste glass powder (GP) as a partial cement replacement (up to 20%) with two different particle size distributions ((55 µm < GP-A < 135 µm) and (55 µm > GP-B)) on the compressive strength and Modulus of Elasticity (MOE) of concrete. The concrete mixes for GP-A considered in this study have water to binder ratio (w/b) of 0.49 and 0.57, whereas only a w/b ratio of 0.57 was considered for GP-B mixes. The experimental data obtained were used to develop different models to predict the elastic modulus of GP-modified concrete.

The test results showed that the compressive strength and the MOE decreased with the increase of GP content. The size effect of GP as compared to w/b and GP content on compressive and MOE was relatively small. A nearly similar failure behaviour and peak strain were observed for all concrete mixes. The stiffness of the concrete decreases comparatively with an increase in the GP replacement level. Finally, the proposed MOE equations provide better predictions than the empirical models and practice codes considered in this study. They can be used in calculating the elastic modulus of GP-modified concrete.

摘要

本文旨在通过实验研究废玻璃粉 (GP) 作为具有两种不同粒径分布 ((55 µm < GP-A < 135 µm) 和 (55 µm > GP) 的部分水泥替代品 (高达 20%) 的影响。 -B)) 对混凝土的抗压强度和弹性模量 (MOE)。本研究中考虑的 GP-A 混凝土混合料的水胶比 (w/b) 为 0.49 和 0.57，而 GP-B 混合料仅考虑了 0.57 的 w/b 比。获得的实验数据用于开发不同的模型来预测 GP 改性混凝土的弹性模量。

试验结果表明，抗压强度和MOE随着GP含量的增加而降低。与 w/b 和 GP 内容相比，GP 的尺寸效应对压缩和 MOE 的影响相对较小。对于所有混凝土混合物，观察到几乎相似的失效行为和峰值应变。随着 GP 更换水平的增加，混凝土的刚度相对降低。最后，提出的 MOE 方程提供了比本研究中考虑的经验模型和实践代码更好的预测。它们可用于计算 GP 改性混凝土的弹性模量。