节能与环保_2020_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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节能与环保

玻璃钢再生料对RPC工作性及力学性能影响试验研究

腾银见1,2，吕淑珍1，李军2，卢忠远2，牛云辉2，赖振宇2

2020年第5期

摘要

引用本文

摘要：将玻璃钢废料进行切割-粉碎-筛分处理，得到了玻璃钢再生纤维、再生粉末两种原料，并分别代替耐碱玻璃纤维和石英砂制备了活性粉末混凝土（RPC），研究了玻璃钢再生料对RPC力学性能的影响。结果表明，以玻璃钢再生纤维代替耐碱玻璃纤维制备RPC时，新拌RPC的流动性变化不大，力学性能略有降低。以玻璃钢再生粉末代替石英砂制备无纤维RPC时，新拌RPC的流动性随玻璃钢再生粉末掺量的增加而略有降低，但力学性能有明显提升。Abstract:TheGFRPscrapwascut-pulverized-screenedtoobtaintwokindsofrawmaterialsofGFRPrecycledfiberandrecycledpowder,andreactivepowderconcrete(RPC)waspreparedbyreplacingtheglassfiberandquartzsandwiththesetwomaterialsrespectively,andtheinfluenceoftheGFRPrecycledmaterialsontheworkabilityandmechanicalpropertiesofRPCwasstudied.TheresultsshowthatwhenRPCispreparedbyreplacingthealkali-resistantglassfiberwithGFRPrecycledfiber,thefluidityofthefreshRPCchangeslittle,andthemechanicalpropertiesdecreasedslightly.WhenthequartzsandisreplacedbyGFRPrecycledpowdertopreparefiber-freeRPC,thefluidityofthefreshRPCdecreasesslightlywiththeincreaseoftheGFRPrecycledpowder,butthemechanicalpropertiesareobviouslyimproved.

腾银见,吕淑珍,李军,等.玻璃钢再生料对RPC工作性及力学性能影响试验研究[J].混凝土与水泥制品,2020(5):92-95. TENG Y J,LYU S Z,LI J,et al.Experimental Study on the Effect of GFRP Recycled Materials on the Workability and Mechanical Properties of RPC[J].China Concrete and Cement Products,2020(5):92-95.

建筑垃圾再生微粉泡沫混凝土性能研究

张肖明，黄沛增，崔庆怡

2020年第5期

摘要

引用本文

摘要：制备了不同建筑垃圾再生微粉取代率的泡沫混凝土，研究了再生微粉取代率对泡沫混凝土流动度、抗压强度、导热系数、干燥收缩值和吸水率的影响。结果表明，随着再生微粉取代率的增加，泡沫混凝土流动度减小；掺加再生微粉明显降低泡沫混凝土的抗压强度；再生微粉取代率对各密度级泡沫混凝土的导热系数影响不明显；随着再生微粉取代率的增加，各密度级泡沫混凝土的干燥收缩值、吸水率逐渐增大，且其对低密度级泡沫混凝土的吸水率影响更加显著。Abstract:Foamconcretewithdifferentreplacementratesofrecycledmicropowderfromconstructionwastewasprepared,andtheeffectsofthereplacementrateofrecycledmicropowderonthefluidity,compressivestrength,thermalconductivity,dryshrinkageandwaterabsorptionoffoamconcretewerestudied.Theresultsshowthatwiththereplacementrateofrecycledmicropowderincreases,themobilityoffoamconcretedecreases.Theadditionofrecycledmicropowdersignificantlyreducesthecompressivestrengthoffoamconcrete.Thereplacementrateofrecycledmicropowderhaslittleeffectonthethermalconductivityoffoamconcreteofvariousdensitylevels.Withtheincreaseofthereplacementrateofrecycledmicropowder,thedryshrinkagevalueandwaterabsorptionofeachdensityfoamconcretegraduallyincrease,anditsinfluenceonthewaterabsorptionoflowdensityfoamconcreteismoresignificant.

张肖明,黄沛增,崔庆怡.建筑垃圾再生微粉泡沫混凝土性能研究[J].混凝土与水泥制品,2020(5):96-98. ZHANG X M,HUANG P Z,CUI Q Y.Study on Performance of Foam Concrete with Recycled Micro Powder from Construction Waste[J].China Concrete and Cement Products,2020(5):96-98.

表面处理旧混凝土骨料对道路基层收缩的影响

沈镱武1，宋旭艳1，陈登1，周建光2，许志杨3，沈菊男1

2020年第5期

摘要

引用本文

摘要：采用机械搅拌方式对旧混凝土骨料表面进行了处理，研究了经表面处理后的旧骨料对道路基层干燥收缩的影响。结果表明，经过表面处理后，旧混凝土骨料表面变得光滑，吸水率降低。经表面处理的旧混凝土骨料能够增大基层的强度，并明显降低基层的干燥收缩。与未处理的旧混凝土骨料基层相比，采用500转搅拌处理的旧混凝土骨料基层的7 d无侧限抗压强度增长了18.4%，27 d总收缩量和总失水率分别降低了20.7%和13.4%。 Abstract: The surface of recycled concrete aggregate was treated by mechanical agitation method, and the effect of recycled concrete aggregate after surface treatment on the drying shrinkage of road base was studied. The results show that the surface of recycled concrete aggregate becomes smooth and the water absorption rate decreases after surface treatment. The recycled concrete aggregate after surface treatment can increase the strength and significantly reduce the drying shrinkage of the road base. Compared with the untreated recycled concrete aggregate base, the 7 d unconstrained compressive strength of recycled concrete aggregate base treated by 500 revolutions increases by 18.4%, and the total shrinkage and total water loss rate of 27 d decrease by 20.7% and 13.4%.

沈镱武,宋旭艳,陈登,等.表面处理旧混凝土骨料对道路基层收缩的影响[J].混凝土与水泥制品,2020(5):99-102 SHEN Y W,SONG X Y,CHEN D,et al.Effect of Surface Treatment of Recycled Concrete Aggregate on the Shrinkage of Road Base[J].China Concrete and Cement Products,2020(5):99-102.

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