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水泥混凝土制品
摘 要：结合多年从业经验，阐述了现阶段我国预制混凝土桩产品种类、生产企业分布、技术装备和应用情况，分析了我国预制混凝土桩行业目前存在的主要问题，如机械化水平不高、工业化和信息化融合水平较低、产品多样性不足、安全生产及绿色环保理念落后、产品应用领域较窄等，并结合我国政策要求、技术水平、行业发展对预制混凝土桩行业的可持续发展进行了展望，为预制混凝土桩行业的可持续发展提供借鉴。Abstract:Basedonmanyyearsofindustryexperience,thetypes,distributionofproductionenterprises,technicalequipmentofprecastconcreteproductsandtheapplicationinChinaatpresentareintroduced,andthecurrentmainproblemsexistingintheprecastpileindustryinChinaareanalyzed,suchaslowlevelofmechanization,lowlevelofintegrationofindustrializationandinformationtechnology,insufficientproductdiversity,laggingideaofsafetyproductionandgreenenvironmentalprotection,andnarrowapplicationfieldofproducts.Inaddition,inaccordancewiththepolicyrequirements,technicallevelandindustrydevelopmentofChina,thecorrespondingoutlookforthesustainabledevelopmentofprecastconcretepileindustryinChinaisputforwardinordertoprovideadviceandguidanceforthesustainabledevelopmentoftheprecastconcretepileindustry.
蒋元海.对现阶段我国预制混凝土桩行业发展的几点思考[J]混凝土与水泥制品,2020(6):30-33,40.
JIANG Y H.Thoughts on the Development of Precast Concrete Pile Industry in China[J].China Concrete and Cement Products,2020(6):30-33,40.
傅少华1，邵永健1，凌 智1，王国佐2
摘 要：通过5个钢筋ECC柱和1个钢筋混凝土柱在压-弯-剪-扭复合应力状态下的单调受扭试验，研究了构件的破坏形态、延性系数、扭矩-扭率（T-θ）曲线，分析了纤维掺量、纵筋配筋率、箍筋间距对钢筋ECC柱受扭性能的影响。试验结果表明，在复合受扭作用下，6个试件均为受扭破坏，其中5个钢筋ECC柱的裂缝细而密；增加纤维和减少箍筋间距可以提高试件延性，掺入PVA纤维的试件延性明显优于普通钢筋混凝土柱；5个钢筋ECC柱的扭矩-扭率（T-θ）曲线更为饱满，破坏阶段扭矩下降缓慢，受扭承载力高。Abstract:Throughthemonotonoustwistingtestof5reinforcedECCcolumnsand1reinforcedconcretecolumnunderpressure-bend-shear-twistingcompoundstress,thedestructiveform,ductioncoefficient,torqueT-θratioofthecomponentswerestudied,andtheinfluenceoffiberdoping,ribbandingrateandhoopspacingonthetwistingperformanceoftherebarECCcolumnwasanalyzed.Thetestresultsshowthatunderthecompoundtwistingaction,6testpiecesaretwistedanddestroyed,and5ofthemreinforcedECCcolumnshavefineanddensecracks.Increasingfiberandreducingthespacingofthehoopscanimprovetheelongationofthetestpiece,andtheductilityofthePVAfibertestpieceisobviouslybetterthanthatoftheordinaryreinforcedconcretecolumn.ThetorqueT-twistingcurveofthe5rebarECCcolumnsisfullerandhasahighcarryingcapacity,resultinginaslowdropintorqueduringthedestructionphase.
傅少华,邵永健,凌智,等.钢筋ECC柱复合抗扭性能试验研究[J]混凝土与水泥制品,2020(6):34-36.
FU S H,SHAO Y J,LING Z,et al.Experimental Study on Torsional Properties of Reinforced ECC Columns[J].China Concrete and Cement Products,2020(6):34-36.
竹乃杰
摘 要：介绍了白色清水预制混凝土构件（PC构件）的原材料选用、配合比设计、构件制作要点和脱模制度，研究了成品保护及破损修补方法，实现了对白色清水PC构件制作、储运、修补全过程外观质量的有效控制。Abstract:Thekeyproductiontechnologyofthewhiteprefabricatedconcretecomponentsisintroducedastheselectionofrawmaterials,thedeterminationofmixproportion，themethodofmakingcomponentsanddemouldingprocedure,andtheprotectionofthefinishedproductsandthemethodsofrepairingthedamagearestudied.Theapparentqualitycontrolmethodsintheprocessofmaking,storageandtransportationofwhiteprefabricatedconcretecomponentsarerealized.
竹乃杰.白色清水预制混凝土构件制作要点[J]混凝土与水泥制品,2020(6):37-40.
ZHU N J.Key Factors of White Precast Concrete Components Production[J].China Concrete and Cement Products,2020(6):37-40.