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水 泥 混 凝 土 制 品
吴其群1，余晓文2，滕耀华2，袁红星2，刘为敏 2
摘 要：研究了石膏作为激发剂生产免蒸压PHC管桩的机理，探讨了矿粉和石膏的合适掺量。结果表明，为缩短PHC管桩的养护周期，石膏激发剂混凝土采用85～90℃的蒸汽养护是可行的。同时，DEF膨胀的危害也可以得到控制和避免。 Abstract：ThemechanismofgypsumasanactivatortoproduceNon-autoclavedPHCpipe,andtheproperamountofslagandgypsumwasstudied.Theresultsshowthatgypsumasanactivatorforthepreparationofconcretewith85～90℃steamcuringisafeasiblewaytoshortenthecuringperiod.ThedamageofDEFexpansioniscontrollableandavoidable.
吴其群,余晓文,滕耀华,等.延迟钙矾石膨胀在免蒸压管桩中的应用研究[J].混凝土与水泥制品,2020(3):31-33+38.
WU Q Q,YU X W,TENG Y H,et al.Study on Application of Delayed Ettringite Formation in Non-autoclaved PHC Pipes[J].China Concrete and Cement Products,2020(3):31-33+38.
WU Q Q,YU X W,TENG Y H,et al.Study on Application of Delayed Ettringite Formation in Non-autoclaved PHC Pipes[J].China Concrete and Cement Products,2020(3):31-33+38.
杨博凯1，刘小艳1，胡钰泉2，李保松1，吴春颖3
摘要: 对比研究了单一氯盐和硫酸盐-氯盐耦合侵蚀条件下，环氧煤沥青防腐涂层厚度对PCCP蒸养和标养砂浆的Cl-渗透规律；通过抗压耐蚀系数这一指标，评价了涂层厚度和养护方式对砂浆抗硫酸盐-氯盐耦合侵蚀性能的影响。结果表明，相比蒸养砂浆，标养砂浆有更强的抗侵蚀性能；随着环氧煤沥青漆涂层厚度的增加，砂浆的抗侵蚀能力明显增强；在SO42-与Cl-共同侵蚀下，抗压耐蚀系数呈现出先增加后减小的规律；SO42-在侵蚀早期一定程度上会抑制Cl-的扩散，随着侵蚀时间增长，钙矾石大量生成，砂浆内部孔隙率逐渐增大，Cl-扩散速率逐渐增加。 Abstract: ThechlorideionpermeabilityofsteamcuringandstandardmortarforPCCPcoatedwithdifferentthicknessofepoxycoaltarpitchanticorrosivecoatingwasstudiedundertheenvironmentofsinglechlorideandsulfate-chloridecouplingerosion.Basedontheindexofcompressionandcorrosionresistancecoefficient,theeffectsofcoatingthicknessandcuringmethodonthesulfate-chloridecouplingcorrosionresistanceofmortarwereevaluated.Theresultsshowthatcomparedwithsteamcuringmortar,standardmortarhasstrongercorrosionresistance,andthecorrosionresistanceofmortarisobviouslyenhancedwiththeincreaseofcoatingthicknessofepoxycoaltarpaint.Undertheco-erosionofsulfateionandchlorideion,thepressureandcorrosionresistancecoefficientincreasesatfirstandthendecreases.TheexistenceofSO42-caninhibitthediffusionofCl-toacertainextentintheearlystageoferosion.Withtheincreaseoferosiontime,alargeamountofettringiteisformed,theinternalporosityofmortarincreasesgradually,andthediffusionrateofCl-increasesgradually.
杨博凯,刘小艳,胡钰泉,等.涂层厚度对PCCP砂浆抗硫酸盐-氯盐侵蚀性能的影响研究[J].混凝土与水泥制品,2020(3):34-38.
YANG B K,LIU X Y,HU Y Q,et al.Effect of Coating Thickness on the Sulfate-choride Coupling Corrosion Cesistance of PCCP Mortar[J].China Concrete and Cement Products,2020(3):34-38.
杨尚荣，万俊飞
摘要：为实现不同厚度、高度、宽度预应力钢筋混凝土双T板的低成本生产，介绍了可扩展组合式长线台生产预应力钢筋混凝土双T板的设计方法和生产工艺，包括截面设计、钢筋布置、起拱控制、钢筋放张方式，以期扩大预应力双T板在大跨度工业建筑、公用建筑等中的应用。
Abstract：In order to realize the low-cost production of different thickness, height and width of prefabricated reinforced concrete double T-plate, the design method and production process of the prefabricated prestressed reinforced concrete double T-plate in this production mode are introduced, including its cross section, steel reinforcement, arching control, steel reinforcement, which can expand the application in prestressed double T-plate in larege-span industrial buildings and public buildings.
Abstract：In order to realize the low-cost production of different thickness, height and width of prefabricated reinforced concrete double T-plate, the design method and production process of the prefabricated prestressed reinforced concrete double T-plate in this production mode are introduced, including its cross section, steel reinforcement, arching control, steel reinforcement, which can expand the application in prestressed double T-plate in larege-span industrial buildings and public buildings.
杨尚荣,万俊飞.可扩展组合式长线台生产模式下双T板的设计和生产工艺[J].混凝土与水泥制品,2020(3):39-41.
YANG SR,WAN J F.Design and Production Technology of Double T-plate in Extensible Combined Long-line Production Mode[J].China Concrete and Cement Products,2020(3):39-41.
YANG SR,WAN J F.Design and Production Technology of Double T-plate in Extensible Combined Long-line Production Mode[J].China Concrete and Cement Products,2020(3):39-41.