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1、學(xué)兔兔www.xuetutu.com釬巍全國中文核心期刊再生混凝土多孔磚用再生骨料基本性能試驗(yàn)研究楊偉軍,李鵬飛,梁建國(長沙理工大學(xué)土木與建筑學(xué)院,湖南長沙410114)摘要:再生混凝土多孔磚與再生混凝土相比有混凝土強(qiáng)度要求低、再生骨料利用率高、生產(chǎn)成本低等優(yōu)點(diǎn),非常適合再生混凝土技術(shù)的推廣應(yīng)用。粒徑O~10mm再生骨料基本性能的試驗(yàn)研究是再生混凝土多孔磚性能研究的基礎(chǔ)和關(guān)鍵。再生骨料中細(xì)骨料比例取85%、90%、95%3個(gè)水平,再生骨料中碎磚含量取O、25%、50%、75%、100%5個(gè)水平,用全組合的方式在試驗(yàn)室中
2、配制出3個(gè)系列共15種再生骨料。按照GB/T14684--2001及GB/T14685--2001對(duì)這l5種再生骨料的級(jí)配、表觀密度、吸水率、壓碎指標(biāo)進(jìn)行實(shí)驗(yàn)。試驗(yàn)結(jié)果表明,粒徑0~10mill再生骨料隨著骨料中碎磚含量的增多,再生骨料的表觀密度、吸水率、壓碎指標(biāo)增大:壓碎指標(biāo)與吸水率、壓碎指標(biāo)與表觀密度呈正比。這個(gè)性質(zhì)與目前再生粗骨料的規(guī)律不同,說明混凝土磚用O~10mm再生骨料的性質(zhì)不同于再生粗骨料。關(guān)鍵詞:再?;炷炼嗫状u;再生骨料;表觀密度;吸水率;壓碎指標(biāo)中圖分類號(hào):TU522.3文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):100
3、1—702X(2011)03—0015—05ExperimentalstudyonbasicpropertiesofrecycledaggregatefortheproductionofconcreteperforatedbrickYANGWe~un,LIPentfei,LIANG~anguo(SchoolofCivilEngineeringandArchitecture,ChangshaUniversityofScience&Technology,Changsha410114,Hunan,China)Abstract:
4、Recycledconcreteperforatedbrick,comparedwiththerecycledconcrete,havesomeadvantagesoflowconcretestrengthrequirements,highutilizationrateofrecycledaggregateandlowproductioncosts.Soitisidealforthepromotionandapplicationofrecycledconcretetechnology.0-10malsizerangeof
5、thebasicpropertiesofrecycledaggregateisthebasicandkey.oftherecycledconcreteperforatedbrick.Theproportionofrecycledaggregateinthefineaggregatetotakethethreelevelsof85%,90%,95%,andtheproportionofrecycledaggregateinthebrokenbrickstotakethefivelevelsof0,25%,50%,75%,1
6、00%.Atotalof15differenttypesofrecycledaggregateinthreeserieswerepreparedinthelaboratory.Grading,apparentdensity,water.a(chǎn)bsorptionandcrushingvalueofthese15typesofrecycledaggregateweretextedinaccordancewiththespecificationsofGB/T14684--2001andGB/T14685--2001.Theresu
7、ltsofexperimentshowthatwiththebrokenbrickscontentinrecycledaggregateofsizerange0-10mmincreased,theapparentdensity,waterabsorptionandcrushingvalueincreased;appositivecorrelationbetweencrushingvalueandwaterabsorption,andbetweencrashingvalueandapparentdensitytoo.The
8、sepropertiesaredifferentfromthecurrentresearchofrecycledcoarseaggregate,whichmeansthatthepropertiesofret’vcledaggregateofsizerange0~10mmfor.concretebrickuseisd