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1、2017年第8期(總第334期)混凝土實(shí)用技術(shù)Number8in2017(TotalNo.334)ConcretePRACTICALTECHNOLOGYdoi:10.3969/j.issn.1002-3550.2017.08.031再生黏土磚骨料含量對(duì)透水混凝土性能的影響張志權(quán),劉云霄(長(zhǎng)安大學(xué)建筑工程學(xué)院,陜西西安710061)摘要:為了探討再生黏土磚骨料在透水混凝土中的應(yīng)用問(wèn)題,按總骨料中再生黏土磚骨料體積百分比不同配制了6組再生骨料,先對(duì)6組再生骨料的基本性能進(jìn)行測(cè)試,再對(duì)6組再生骨料透水混凝土進(jìn)行坍落度、密度、抗壓強(qiáng)度、抗彎強(qiáng)度、彈性模量、孔隙率
2、、滲透系數(shù)、抗凍性試驗(yàn)。分析試驗(yàn)數(shù)據(jù)得出:隨著總骨料中再生黏土磚骨料體積百分比增加,透水混凝土的坍落度和密度逐漸減??;當(dāng)總骨料中再生黏土磚骨料體積百分比超過(guò)40%,透水混凝土的力學(xué)性能出現(xiàn)不同幅度的下降;透水混凝土的滲透系數(shù)和孔隙率與總骨料中再生黏土磚骨料體積百分比基本上沒(méi)有相關(guān)性;透水混凝土的強(qiáng)度損失率和質(zhì)量損失率都隨著總骨料中再生黏土磚骨料體積百分比增加而增大,而且當(dāng)再生黏土磚骨料體積百分比大于40%時(shí)呈現(xiàn)出加速增大的趨勢(shì)。結(jié)果表明:在天然骨料中摻加適量再生黏土磚骨料配制透水混凝土是可行的,其透水性基本保持不變,但是,當(dāng)總骨料中再生黏土磚骨料體積百分
3、比超過(guò)40%時(shí),透水混凝土的力學(xué)性能和耐久性受到很大的影響。關(guān)鍵詞:道路工程;透水混凝土;力學(xué)性能;透水性;耐久性中圖分類號(hào):TU528.7文獻(xiàn)標(biāo)志碼:A文章編號(hào):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