基于水胶比和再生粗骨料取代率对混凝土性能的影响分析  

Analysis of the influence of water cement ratio and recycled coarse aggregate replacement rate on the performance of concrete

作　　者：孙家国[1] 谷艳玲[1] 

机构地区：[1]武夷学院土木工程与建筑学院,福建武夷山354300

出　　处：《混凝土》2016年第4期64-67,共4页Concrete

基　　金：福建省自然科学基金项目"基于矿渣和再生骨料耦合配制混凝土力学性能和耐久性研究"(2015J01648);南平市指导性科技计划项目"武夷山再生骨料生态护坡混凝土的配制及应用研究"(N2014D02)

摘　　要：通过水胶比和再生粗骨料取代率的变化,以C30为设计强度,利用均匀设计法制定了15组试验方案,研究其对混凝土流动性和抗压强度的影响规律。试验结果表明:再生混凝土抗压强度随水胶比增大而降低,当取代率在50%以下时具有较好的稳定性;再生粗骨料取代率对混凝土强度影响较大,其强度普遍低于普通混凝土,尤其取代率为30%和50%时表现较为明显。当水胶比0.40、再生粗骨料取代率100%时,混凝土28 d抗压强度可以达到45.2 MPa。Through the change of water cement ratio and regeneration coarse aggregate replacement rate, we draw up 15 groups of plans with strength C30 by using uniform design method and study its influence on concrete fluidity and compressive strength. The result shows compressive strength of recycled concrete decreases with water cement ratio increasing and achieves preferable stability with the replacement under 50%. The replacement rate of recycled coarse aggregate has a great effect on the strength of concrete, and its strength is generally lower than that of ordinary concrete ,especially with the replacement rate 30%and 50%.When the water cement ratio is 0.40, recycled coarse aggregate replacement rate is 100% ,compressive strength of the concrete can reach 45.2 MPa in 28 days.

关 键 词：再生混凝土 水胶比 抗压强度 试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]