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ID:46612383
大小:1.05 MB
页数:5页
时间:2019-11-26
《再生黏土砖骨料含量对透水混凝土性能的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-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.1002-3550.2017.08.031再生黏土砖骨料含量对透水混凝土性能的影响张志权,刘云霄(长安大学建筑工程学院,陕西西安710061)摘要:为了探讨再生黏土砖骨料在透水混凝土中的应用问题,按总骨料中再生黏土砖骨料体积百分比不同配制了6组再生骨料,先对6组再生骨料的基本性能进行测试,再对6组再生骨料透水混凝土进行坍落度、密度、抗压强度、抗弯强度、弹性模量、孔隙率
2、、渗透系数、抗冻性试验。分析试验数据得出:随着总骨料中再生黏土砖骨料体积百分比增加,透水混凝土的坍落度和密度逐渐减小;当总骨料中再生黏土砖骨料体积百分比超过40%,透水混凝土的力学性能出现不同幅度的下降;透水混凝土的渗透系数和孔隙率与总骨料中再生黏土砖骨料体积百分比基本上没有相关性;透水混凝土的强度损失率和质量损失率都随着总骨料中再生黏土砖骨料体积百分比增加而增大,而且当再生黏土砖骨料体积百分比大于40%时呈现出加速增大的趋势。结果表明:在天然骨料中掺加适量再生黏土砖骨料配制透水混凝土是可行的,其透水性基本保持不变,但是,当总骨料中再生黏土砖骨料体积百分
3、比超过40%时,透水混凝土的力学性能和耐久性受到很大的影响。关键词:道路工程;透水混凝土;力学性能;透水性;耐久性中图分类号:TU528.7文献标志码:A文章编号:1002-3550(2017)08-0123-05lnfluenceofrecycledclaybrickaggregatecontentonthepropertiesofperviousconcreteZHANGZhiquan,LIUYunxiao(SchoolofCivilEngineering,Chang′anUniversity,Xi′an700061,China)Abstract:I
4、nordertostudytheapplicationofrecycledaggregates(RA)producedbymechanicalshreddingfromdiscardedclaybricksinperviousconcrete.6groupsofrecycledaggregatewerepreparedaccordingtothepercentageofrecycledclaybrickaggregateintotalaggregatesandthebasicperformancesof6groupsofrecycledaggregate
5、weretestedfirstly.Thenexperimentsaboutslump,density,compressivestrength,elasticitymodulus,flexuralstrength,permeabilitycoefficientwereconducted,includingfreezingandthawingcycletests.Thetestdataindicatedthat,withtheincreasingofclaybrickaggregatespercentageintotalaggregates,slumpan
6、ddensityofperviousconcretedecreases.Whenclaybrickaggregatespercentageisgreaterthan40%,themechanicalpropertiesofperviousconcreteappeareddifferentamplitudedecreased.Perviousconcretepermeabilitycoefficientandtotalvoidratiodidn′tchangewiththeincreasingofclaybrickaggregatespercentage.
7、Strengthlossrateandmasslossrateofperviousconcreteincreasewithttheincreasingofclaybrickaggregatespercentage,andwhenthepercentageofclaybrickaggregatesgreaterthan40%showingatrendtoacceleratetheincrease.Theresultsshowedthataddingamountofrecycledclaybrickaggregateinthenaturalaggregate
8、tomakingperviousconcreteisfeasible,itspe
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