RAC配合比设计及力学性能试验研究
发布时间：2019-04-09 18:09
【摘要】：将收集的三种不同来源的废弃混凝土,制备成再生粗骨料RA-I、RA-II和RA-III。并分别对再生混凝土进行配合比设计,通过(RAC)力学性能试验,研究了不同取代率及不同使用寿命的骨料对再生混凝土抗压强度、劈裂抗拉强度和抗折强度的影响。研究结果表明:在不同取代率的情况下,立方体抗压强度、轴心抗压强度基本均超过普通混凝土的相应强度;对于劈裂抗拉强度,骨料RA-I随着取代率的增加相继增长;骨料RA-II和骨料RA-III随着取代率的增加呈先增加后降低的趋势;对于抗折强度,随着取代率的增加而呈先降低后持续增高的趋势。
[Abstract]:The waste concrete collected from three different sources was prepared into recycled coarse aggregate RA-I,RA-II and RA-III.. The effects of aggregate with different substitution rate and different service life on compressive strength, splitting tensile strength and flexural strength of recycled concrete were studied by (RAC) mechanical properties test. The results show that the cube compressive strength and axial compressive strength are basically higher than the corresponding strength of ordinary concrete under different substitution rates, and for splitting tensile strength, aggregate RA-I increases with the increase of substitution rate. The aggregate RA-II and aggregate RA-III increased first and then decreased with the increase of substitution rate, and the flexural strength decreased first and then increased with the increase of substitution rate.
【作者单位】： 西安理工大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51179154)
【分类号】：TU528
本文编号：2455412
[Abstract]:The waste concrete collected from three different sources was prepared into recycled coarse aggregate RA-I,RA-II and RA-III.. The effects of aggregate with different substitution rate and different service life on compressive strength, splitting tensile strength and flexural strength of recycled concrete were studied by (RAC) mechanical properties test. The results show that the cube compressive strength and axial compressive strength are basically higher than the corresponding strength of ordinary concrete under different substitution rates, and for splitting tensile strength, aggregate RA-I increases with the increase of substitution rate. The aggregate RA-II and aggregate RA-III increased first and then decreased with the increase of substitution rate, and the flexural strength decreased first and then increased with the increase of substitution rate.
【作者单位】： 西安理工大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51179154)
【分类号】：TU528
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