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1、2016年第12期(總第326期)Number12in2016(TotalNo.326)混凝土Concrete原材料及輔助物料MATERIAI,AND^Dn堰INICLEdoi:10.3969,j.issn.1002—3550.2016.12.017再生輕骨料取代天然骨料對混凝土抗壓強(qiáng)度的影響分析張向?qū)鵯a·b。藺新艷佑,王鵬2’3,楊健輝la,b,吳帆伯(1.河南理工大學(xué)a.生態(tài)建筑與環(huán)境構(gòu)建河南省工程實驗室;b.土木工程學(xué)院,河南焦作454000;2.廣西交通科學(xué)研究院,廣西南寧530007;3.廣西道路結(jié)構(gòu)與材料重點(diǎn)實驗室,廣西南寧530007)摘要:為了研究再生輕骨料取代天然骨
2、料對混凝土抗壓強(qiáng)度的影響,以再生輕粗骨料取代率和干表觀密度為變化參數(shù),設(shè)計并制作了15個標(biāo)準(zhǔn)立方體試塊進(jìn)行抗壓強(qiáng)度試驗。試驗記錄了試塊的破壞過程和破壞形態(tài),實測了試塊的干表觀密度和立方體抗壓強(qiáng)度,基于最dx__-乘法原理,擬合分析了干表觀密度與取代率、立方體抗壓強(qiáng)度與取代率之間的關(guān)系曲線,探討了變化參數(shù)對立方體抗壓強(qiáng)度的影響規(guī)律。研究結(jié)果表明:再生輕骨料混凝土試塊最終出現(xiàn)劈裂破壞;干表觀密度與取代率或者立方體抗壓強(qiáng)度與取代率線形相關(guān)性較高;再生輕骨料混凝土立方體抗壓強(qiáng)度隨干表觀密度的增加或再生輕粗骨料取代率的減小而逐漸增大。關(guān)鍵詞:再生輕骨料混凝土;立方體抗壓強(qiáng)度;再生輕粗骨料取代率;
3、干表觀密度中圖分類號:TU528.04文獻(xiàn)標(biāo)志碼:A文章編號:1002~3550(2016)12~0064—04AnalysisofinfluencenatureaggregatereplacedbyrecycledlightweightaggregatemakesoncompressivestrengthofconcreteZHANGXianggan918?,LINXinyanlbWANGPen92”,YANGJianhui吣,WUFanl6(1a.HenanProvinceEngineeringLaboratoryofEco-architectureandtheBuiltEnvir
4、onment;b.SchoolofCivilEngineering,HenanPolytechnicUniversity,Jiaozuo454000,China;2.GuangxiTransportationResearchInstitute,Nanning530007,China;3.GuangxiKeyLabofRoadStructureandMaterials,Nanning530007,China)Abstract:Inordertostudytheinfluencenatureaggregatereplacedbyrecycledlightweightaggregatemak
5、esoncompressivestrengthofconcrete,withthechangeparametersofreplacementrateofrecycledlightweightcoarseaggregateanddryappearancedensity,15standardcubetestblocksweredesignedandproducedtocarryoutcompressivestrengthtest.Thefailureprocessandfailuremodeoftestblockswererecorde&Dryappearancedensityandcub
6、ecompressivestrengthoftestblocksweremeasured,basedontheprincipleofleastsquaremethod,therelationcurvesbetweendryappearancedensityandreplacementrate,orcubecompressivestrengthandreplacementratewereallanalyzedandfitted,theinfluencechangeparametersmadeoncubecompressivestrengthwasdiscussed.Itisshownth
7、atsplittingfailureOCCurSinthetestblocksofrecycledlightweightaggregateconcreteatlast.Thelinearrelationsbetweendryappearancedensityandreplacementrateorbetweencubecompressivestrengthandreplacementratealeobvious.Cubecompressives