再生混凝土多孔砖砌体受压变形性能及弹性模量的试验研究

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1、2015年第3期(总第305期)混凝土混凝土制品Number3in2015(TotalNo．305)C0NCRE

2、TEPR0DUCTSConcretedoi：10．3969／j．issn．1002—3550．2015．03．038再生混凝土多孔砖砌体受压变形性能及弹性模量的试验研究吴灿炜。郭樟根，孙伟民，沈丹(南京工业大学土木工程学院，江苏南京210009)摘要：采用振动挤压成型的方法制作了再生骨料替代率为75％的再生混凝土多孔砖，新制作的多孔砖抗压强度平均值为8．46MPa；对再生混凝土多孔砖砌体进行了抗压性能试验，研

3、究了不同砂浆强度下再生混凝土多孑L砖砌体的受力全过程及破坏形态，测试得到了再生混凝土多孑L砖砌体的受压应力一应变曲线和弹性模量。研究结果表明：在受压性能和变形性能上，再生混凝土多孔砖砌体和普通混凝土多孑L砖砌体极为类似，砌体被贯通的竖向裂缝分隔成小立柱后被压坏，此时达到砌体的极限状态，再生}昆凝土多孔砖砌体的弹性模量比普通混凝土多孔砖砌体略大。通过对试验数据的回归分析，提出了再生混凝土多孔砖砌体弹性模量计算式以及受压应力一应变关系计算式。关键词：再生}昆凝土多孔砖；受压；弹性模量；应力一应变中图分类号：TU528．7文献

4、标志码：A文章编号：1002—3550(2015)03一O140一O5ExperimentalstudyolpressuredeformaUo1behaviorandelasticmodulusofrecycledaggregatesconcreteperforatedbrickWUCanwei，GUOZhanggen，SUNWeimin，SHENDan(CollegeofCivilEngineering，NanjingUniversityofTechnology，Nanjing210009，China)Abstract

5、：Recycledaggregatesconcreteperforatedbrickwasproducedbyusingthemethodofvibrationandextrusionmolding．There—placementrateofrecycledaggregateis75percent．Theaveragestrengthofrecycledaggregatesconcremperforatedbrickis8．46MPa．Anexperimentalstudyonthecompressionbehavior

6、andelasticmodulusofrecycledaggregatesconcreteperforatedbrickmasonrywaspres—ented．Thefailurecharacteristic，failureprocess，andultimatebearingcapacityofrecycledaggregatesconcreteperforatedbrickmasonrywereanaiyzed，andthestress—straincureandelasticmoduluswerestudiedto

7、o．Thetestresultsshowthatthecompressivepropertiesanddeformationprocessofrecycledaggregatesconcreteperforatedbrickmasonryisprovedtobesimilartotheordinaryconcreteperforatedbrickmasonry．Thelimitstatereachedafterthemainverticalcrackformsandpenetratesthespecimen．Itwasf

8、oundthattheultimatebearingcapacityandelasticmodulusincreasewiththeincreaseofmortarstrength．Basedontheanalyzedandnonlinearregressionofthetestresults，thecalculationformulaofrecycledconcreteperforatedbrickmasonryforelasticmodulusareproposed，andtwocompressivestress—s

9、trainconstitutivemodelswerepresentedtoo．Keywords：recycledaggregatesconcreteperforatedbrick；compression；elasticmodulus；stress—strain弃混凝土的处理问题得到根本解决，节约资源，减轻污染，0引