再生轻骨料取代天然骨料对混凝土抗压强度的影响分析

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1、2016年第12期(总第326期)Number12in2016(TotalNo．326)混凝土Concrete原材料及辅助物料MATERIAI，AND^Dn堰INICLEdoi：10．3969，j．issn．1002—3550．2016．12．017再生轻骨料取代天然骨料对混凝土抗压强度的影响分析张向冈la·b。蔺新艳佑，王鹏2’3，杨健辉la,b，吴帆伯(1．河南理工大学a．生态建筑与环境构建河南省工程实验室；b．土木工程学院，河南焦作454000；2．广西交通科学研究院，广西南宁530007；3．广西道路结构与材料重点实验室，广西南宁530007)摘要：为了研究再生轻骨料取代天然骨

2、料对混凝土抗压强度的影响，以再生轻粗骨料取代率和干表观密度为变化参数，设计并制作了15个标准立方体试块进行抗压强度试验。试验记录了试块的破坏过程和破坏形态，实测了试块的干表观密度和立方体抗压强度，基于最dx__-乘法原理，拟合分析了干表观密度与取代率、立方体抗压强度与取代率之间的关系曲线，探讨了变化参数对立方体抗压强度的影响规律。研究结果表明：再生轻骨料混凝土试块最终出现劈裂破坏；干表观密度与取代率或者立方体抗压强度与取代率线形相关性较高；再生轻骨料混凝土立方体抗压强度随干表观密度的增加或再生轻粗骨料取代率的减小而逐渐增大。关键词：再生轻骨料混凝土；立方体抗压强度；再生轻粗骨料取代率；

3、干表观密度中图分类号：TU528．04文献标志码：A文章编号：1002～3550(2016)12～0064—04AnalysisofinfluencenatureaggregatereplacedbyrecycledlightweightaggregatemakesoncompressivestrengthofconcreteZHANGXianggan918⋯，LINXinyanlbWANGPen92”，YANGJianhui吣，WUFanl6(1a．HenanProvinceEngineeringLaboratoryofEco-architectureandtheBuiltEnvir

4、onment；b．SchoolofCivilEngineering，HenanPolytechnicUniversity，Jiaozuo454000，China；2．GuangxiTransportationResearchInstitute，Nanning530007，China；3．GuangxiKeyLabofRoadStructureandMaterials，Nanning530007，China)Abstract：Inordertostudytheinfluencenatureaggregatereplacedbyrecycledlightweightaggregatemak

5、esoncompressivestrengthofconcrete，withthechangeparametersofreplacementrateofrecycledlightweightcoarseaggregateanddryappearancedensity，15standardcubetestblocksweredesignedandproducedtocarryoutcompressivestrengthtest．Thefailureprocessandfailuremodeoftestblockswererecorde&Dryappearancedensityandcub

6、ecompressivestrengthoftestblocksweremeasured，basedontheprincipleofleastsquaremethod，therelationcurvesbetweendryappearancedensityandreplacementrate，orcubecompressivestrengthandreplacementratewereallanalyzedandfitted，theinfluencechangeparametersmadeoncubecompressivestrengthwasdiscussed．Itisshownth

7、atsplittingfailureOCCurSinthetestblocksofrecycledlightweightaggregateconcreteatlast．Thelinearrelationsbetweendryappearancedensityandreplacementrateorbetweencubecompressivestrengthandreplacementratealeobvious．Cubecompressives