再生混凝土砌块抗压强度和配合比试验研究
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(1 西安建筑科技大学土木工程学院,西安 710055;2 西安墙体材料研究设计院,西安 710061;3 河南城建学院土木工程系,平顶山 467000)[摘要]通过正交试验研究再生混凝土砌块配合比中四个主要影响因素(单位体积混凝土用水量、水灰比、再生粗骨料取代率、再生细骨料取代率)对其抗压强度的影响规律。同时在正交试验的基础上,研究砂率对再生混凝土砌块抗压性能的影响。通过试验优化了再生混凝土砌块的配合比,为再生混凝土砌块生产和推广提供依据。试验结果证明,对于单排孔再生混凝土小型空心砌块,若配合比选取合适,强度等级可以达到MU5.0,可作为承重砌块使用。[关键词]正交试验;再生粗骨料;再生细骨料;再生混凝土砌块Experimental study on the compressive strength and mixture ratio of recycled concrete hollow blocksBai Guoliang1, Zhang Fengjian1,3, An Yuyi1, Xiao Hui2, Quan Zonggang2(1 College of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China;2 Xian Research and Design Institute of Wall & Roof Materials, Xian 710061, China;3 Henan University of Urban Construction, Pingdingshan 467000, China)Abstract:The influence rule of the four main factors(water,water-cement ratio,recycled coarse aggregates,recycled fine aggregates of recycled concrete blocks mixture ratio)on compressive strength was studied through the orthogonal test.On the basis of orthogonal test,the effect of sand ratio on compressive performance of recycled concrete blocks was studied.Through tests the mixture ratio of recycled concrete blocks was optimized and the foundation to produce and popularize the recycled concrete blocks was provided.The experiment results prove that if the selection of mixture ratio is proper,the recycled concrete single-row holes blocks can be used to make bearing wall and its compressive strength can reach to MU5.0.Keywords:orthogonal test; recycled coarse aggregate; recycled fine aggregate; recycled concrete block*国家科技支撑计划项目(2008BAK48B05),陕西省自然科学基础研究计划重点项目(2009JZ012)。作者简介:白国良,教授,博士,Email:guoliangbai@126.com。参考文献[1]肖建庄,王幸,黄键,等. 再生混凝土空心砌块受压性能分析[J]. 住宅科技,2005(12):32-35.[2]肖建庄. 再生混凝土[M]. 北京:中国建筑工业出版社,2008.[3]孙跃东,周德源. 我国再生混凝土的研究现状和需要解决的问题[J]. 混凝土,2006(4):25-28.[4]杜婷,李惠强,吴贤国. 再生混凝土的研究现状和存在的问题[J]. 建筑技术,2003,34(2):133-134.[5]安昱峄,张锋剑,李晓文,等. 再生混凝土砌块抗折强度影响因素分析[J]. 砖瓦,2009(5):26-29.[6]西安建筑科技大学,西安墙体材料研究设计院. 地震灾区重建大板组合装配结构体系房屋示范研究报告[R]. 西安建筑科技大学土木工程学院资料室,2009.[7]GB8239—1997 普通混凝土小型空心砌块[S].北京:中国标准出版社,1997.[8]GB/T15229—2002 轻集料混凝土小型空心砌块[S].北京:中国标准出版社,2002.