再生轻骨料水泥砂浆抗压强度试验研究

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1、2017年第4期（总第330期）混凝土预拌砂浆Number4in2017（TotalNo.330）ConcreteREADYMIXEDMORTARdoi：10.3969/j.issn.1002-3550.2017.04.032再生轻骨料水泥砂浆抗压强度试验研究张向冈a，b，汪昉b，杨健辉a，b，陈真b（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）摘要：为了研究再生轻骨料水泥砂浆的抗压强度，以干表观密度和再生轻骨料取代率作为设计参数，对采用5种不同再生轻骨料取代率（100%、75%、

2、50%、25%、0）的标准立方体水泥砂浆试块进行受压试验。观察了破坏过程和破坏形态，实测了立方体试块的极限抗压强度，得到了立方体抗压强度-干表观密度关系曲线和立方体抗压强度-再生轻骨料取代率关系曲线，分析了设计参数对立方体试块抗压强度的影响规律。结果表明：当再生轻骨料水泥沙浆的再生轻骨料取代率为0时，其抗压强度最高；再生轻骨料取代率为75%时，其抗压强度处于理想状态；再生砂浆试块的破坏形态类似于普通水泥砂浆，均发生在轻骨料和水泥胶凝材料的界面处。关键词：再生水泥砂浆；取代率；立方体抗压强度；再生轻骨料；干表观密度中图分类号：TU

3、528.01文献标志码：A文章编号：1002-3550（2017）04-0129-04ExperimentalstudyoncompressivestrengthofcementmortarwithrecycledlightweightaggregateZHANGXiangganga，b，WANGFangb，YANGJianhuia，b，CHENZhenb（a.HenanProvinceEngineeringLaboratoryofEco-architectureandthebuiltenvironment；b.Schoolof

4、CivilEngineering，HenanPolytechnicUniversity，Jiaozuo454000，China）Abstract:Inordertostudycompressivestrengthofrecycledlightweightaggregatecementmortar，withthedesignparametersofdryapparentdensityandrecycledlightweightaggregatereplacementrate，thestandardcubecementmortaro

5、freplacementrate（100%、75%、50%、25%、0）offivedifferentrecycledlightweightaggregatewasusedintoexperimentalstudyofcompressivestrength.Thefailureprocessandfailuremodeoftestblockswereobserved，theultimatecompressivestrengthofcubeswasrecorded，therelationcurvesofcompressivestr

6、ength-dryapparentdensityandtherelationcurvesofcompressivestrength-recycledlightweightaggregatereplacementratewereobtained，theimpactlawthedesignparametersmadeoncubecompressivestrengthwereanalyzed.Theresultsshowwhenreplacementrateoftherecycledlightweightaggregatecement

7、mortaris0，cubecompressivestrengthisthehighest.Whenreplacementrateofrecycledlightweightaggregateis75%，cubecompressivestrengthisintheidealstate.Failuremodebetweenrecycledlightweightaggregatecementmortarandordinarycementmortarissimilar，itoccursattheinterfacebetweenlight

8、weightaggregateconcreteandcementgelledmaterials.Keywords:recycledcementmortar；replacementrate；cubecompressivestrength；recycledlight