玻璃骨料粒径对玻璃混凝土性能影响的研究

采用各个不同粒径范围的废玻璃骨料代替天然骨料来配制玻璃混凝土,通过测定该混凝土试件的力学强度和变形性能,使用SEM观察、分析试件断面的微观形貌,探讨玻璃骨料粒径对玻璃混凝土性能的影响。结果表明:玻璃骨料粒径为2.36～1.18 mm的混凝土试件早期强度较高,14 d后由于碱-硅膨胀反应(ASR)使强度降低,使用时必须加入碱-硅反应抑制剂;玻璃骨料粒径小于1.18 mm的混凝土试件早期强度虽低,但后期强度较高,性能较好,均可直接用作混凝土骨料。

Study on the influence of particle size of the glass aggregate on the performance of glass concrete

Using each kind of different particle size of the waste glass aggregate to replace the natural aggregate for compounding the glass concrete,the mechanical strength and the deformational property of the glass concrete specimens were tested,the cross section of composite was observed and analysised by SEM,and the influence of the particle size of the glass aggregate on the performance of glass concrete were studied.The experimental results show that,the early strength of the samples with the particle size of glass aggregate between 2.36 mm and 1.18 mm is higher,but after fourteen days,the expansion caused by alkali-silica reaction(ASR) of the glass concrete leads to destruction to the structure,and makes the strength reduce.When the concrete uses this particle size glass aggregate,it should join the alkali-silicon reaction inhibitor.When the particle size of glass aggregate is smaller than 1.18 mm,the early strength of the concrete samples although low,but the later strength higher,and its performance better,so all can be directly used for concrete aggregate.