单掺废玻璃再生混凝土的最优取代率试验研究

发布时间：2018-02-11 00:54

本文关键词： 废弃玻璃混凝土最优取代率　出处：《工程科学与技术》2017年S2期 　论文类型：期刊论文

【摘要】：目前中国大多数的废弃玻璃在处理时采用填埋的方法,造成了环境的污染和资源的浪费。因此为实现废玻璃的资源化,现研究将其应用于建筑原材料混凝土中。将废弃玻璃破碎后得到的不同粒径颗粒分别取代混凝土中的部分粗骨料、细骨料或凝胶材料制成标准试件,按照标准试验法测试不同玻璃颗粒掺量下玻璃混凝土试件的力学性能和工作性能,讨论废弃玻璃掺量与废弃玻璃混凝土坍落度及抗压强度的关系,并同时测试了龄期变化对玻璃混凝土强度的影响。试验发现:将废玻璃颗粒加入混凝土后会降低混凝土的抗压强度,但在最优取代率下与基准混凝土相似,最后以力学强度和废弃玻璃取代率为考量指标得到的最优废弃玻璃再生混凝土的取代率为废弃玻璃粗骨料25%、废弃玻璃细骨料25%、玻璃粉0;最优取代率掺量下废弃玻璃混凝土工作性能优于基准配比混凝土;另外当用75μm的玻璃粉替代混凝土的水泥会降低玻璃混凝土强度,但当替代量小于10%的时候,对试件的强度影响不大。试验结果表明将废玻璃颗粒按一定比例替代混凝土的天然骨料是可行的,并为玻璃混凝土应用于实际工程提供了参数。
[Abstract]:At present, most of the waste glass in China is treated by landfill, which results in environmental pollution and waste of resources. In this paper, we apply it to the building raw material concrete. The coarse aggregate, fine aggregate or gel material in concrete are replaced by different particle sizes of broken glass to make the standard specimen. According to the standard test method, the mechanical and working properties of glass concrete specimens with different content of glass particles were tested, and the relationship between the content of waste glass and slump and compressive strength of abandoned glass concrete was discussed. At the same time, the influence of age change on the strength of glass concrete is tested. It is found that the compressive strength of concrete can be reduced by adding waste glass particles into concrete, but it is similar to the reference concrete under the optimal substitution rate. Finally, based on the mechanical strength and the replacement ratio of waste glass, the optimal replacement rate of recycled concrete is 25% of coarse aggregate, 25% of fine aggregate and 0% of glass powder; the optimum substitution ratio is 25% of waste glass aggregate, 25% of glass powder, and 0% of glass powder. The working performance of glass concrete is better than that of reference concrete. In addition, when cement is replaced by 75 渭 m glass powder, the strength of concrete decreases, but when the substitution is less than 10%, The test results show that it is feasible to replace the natural aggregate of concrete with waste glass particles in a certain proportion and provide parameters for the application of glass concrete in practical engineering.
【作者单位】：四川大学建筑与环境学院;
【基金】：国家自然科学基金资助项目(51678379) 省学术带头人培养基金资助项目(川人[2015]100-1)
【分类号】：TU528

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