再生骨料混凝土在护岸工程应用的可行性  

Feasibility of Utilizing Recycled Aggregate Concrete for Revetment Engineering

作　　者：常洪雷 陈繁育 金祖权[3] 王广月[2] 刘健 CHANG Honglei;CHEN Fanyu;JIN Zuquan;WANG Guangyue;LIU Jian(School of Qilu Transportation,Shandong University,Jinan 250002,China;School of Civil Engineering,Shandong University,Jinan 250061,China;School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]山东大学齐鲁交通学院,济南250002 [2]山东大学土建与水利学院,济南250061 [3]青岛理工大学土木学院,青岛266033

出　　处：《材料导报》2020年第S02期206-211,共6页Materials Reports

基　　金：国家自然科学基金青年基金(51908327);山东省自然科学基金青年基金(ZR2019QEE017)。

摘　　要：采用黄河下游护岸工程当地再生骨料设计了多系列混凝土配合比,综合评估再生混凝土的抗压强度、抗折强度、抗冻性及抗碳化性。通过测试不同掺量单掺粗骨料、单掺细骨料及复掺粗细骨料再生混凝土的抗压强度,优选了抗压强度大于40 MPa且再生骨料取代率不低于50%的混凝土配合比:RSF50,RSF70,RSF100。实验结果显示,优选的三种再生混凝土的力学性能、抗冻性及抗碳化性整体上都弱于普通混凝土,但均可满足黄河下游护坡工程的性能要求;三种配合比的混凝土综合性能排序为RSF50>RSF70>RSF100;考虑到再生骨料的取代率,RSF70的综合表现最佳,推荐将其用于制备护坡砌块并在实际护坡工程中应用。Local recycled aggregates in revetment of the lower Yellow River were used to design a series of concrete mix ratios to comprehensively evaluate the compressive strength,flexural strength,frost resistance and carbonization resistance.By testing the compressive strength of recycled concrete with different ratio of single coarse aggregate,single fine aggregate and mixed coarse and fine aggregate,the mixing ratios of compressive strength greater than 40 MPa and the replacement rate of recycled aggregates not less than 50%are preferred:RSF50,RSF70,RSF100.The experimental results show that the mechanical properties,frost resistance and carbonization resistance of the preferred three mix ratio recycled concrete are generally weaker than normal concrete,but all can meet the performance requirements of slope protection projects in the lower Yellow River.The comprehensive performance of the three mix ratios is ranked as follows:RSF50>RSF70>RSF100.Considering the replacement rate of recycled aggregate,RSF70 has the best comprehensive performance,which is recommended for the preparation of slope protection blocks and for application in actual bank protection projects.

关 键 词：混凝土 再生骨料 护岸工程 配合比 力学性能 耐久性能 

分 类 号：TU52[建筑科学—建筑技术科学]