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时间:2020-03-23
《透水混凝土的基本性能试验研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2017年第8期(总第334期)混凝土实用技术Number8in2017(TotalNo.334)ConcretePRACTICALTECHNOLOGYdoi:10.3969/j.issn.1002-3550.2017.08.034透水混凝土的基本性能试验研究张国强1,焦楚杰1,江涌波2,彭奥1(1.广州大学土木工程学院,广东广州510006;2.广州市第四建筑工程有限公司,广东广州510095)摘要:通过正交试验法研究了砂率、水胶比、设计孔隙率和增强剂掺量4个因素对透水混凝土抗压强度、抗折强度、透
2、水系数、孔隙率等性能的影响以及透水系数与抗压抗折强度的关系,优选出配合比。结果表明:砂率和设计孔隙率对透水混凝土抗压强度、抗折强度、透水系数影响大,增强剂和水胶比影响次之;随着砂率的提高透水混凝土强度逐渐增大,透水系数逐渐下降;随着设计孔隙率的增大,强度逐渐降低,透水系数逐渐增大。当砂率在2%~4%、孔隙率在18%~20%、增强剂掺量在5%时,透水混凝土的强度与透水系数达到较优状态;通过试验数据的回归分析,分别建立了透水系数与抗压强度、抗折强度的关系式。关键词:透水混凝土;强度;透水性系数;孔隙率中
3、图分类号:TU528.2文献标志码:A文章编号:1002-3550(2017)08-0136-04ExperimentalstudyonthebasicpropertiesofthepermeableconcreteZHANGGuoqiang1,JIAOChujie1,JIANGYongbo2,PENGAo1(1.DepartmentofCivilEngineering,GuangzhouUniversity,Guangzhou510006,China;2.GuangzhouFourthConstr
4、uctionEngineeringCo.,Ltd.,Guangzhou510095,China)Abstract:Bythemethodoforthogonalexperiment,itwerestudiedtheinfluencesoffourfactors,suchassandrate,water-binderratio,designedporosityandmicrosilicavolume,oncompressivestrength,bendingstrength,permeablecoef
5、ficient,porosityofpermeablecon-creteandtherelationsbetweenpermeablecoefficientandcompressiveandbendingstrengthwerealsoinvestigatedinthismethod,andtheoptimalmixratiowasobtained.Theresultsshowthatsandrateanddesignedporosityhaveaprioreffectoncompressivean
6、dbendingstrengthandpermeablecoefficientofpermeableconcrete,whilewater-binderratioandmicrosilicavolumehavelessimpactsonthoseper-formances.Withtheincreaseofsandrate,thestrengthofpermeableconcreteincreasesgradually,andthepermeablecoefficientdecreasesgradu
7、ally.Withtheincreaseofdesignedporosity,thestrengthofpermeableconcretedecreasesgradually,andthepermeablecoefficientin-creasesgradually.Whensandrateisbetween2%and4%,porosityis18%~20%,andenhanceramountis5%,thestrengthandpermeablecoefficientofpermeableconc
8、retereachitsoptimalstate.Theformulationsofpermeablecoefficientandcompressivestrength,andbendingstrengtharerespectivelyestablishedaccordingtotheregressionanalysisofexperimentaldata.Keywords:permeableconcrete;strength;permeablecoefficient
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