石膏对铝酸钙水泥混凝土力学与耐久性能的影响

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发布时间：2020-01-06 00:00:00

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石膏对铝酸钙水泥混凝土力学与耐久性能的影响

Effect of CaSO4 on Mechanical Properties and Durability of Calcium Aluminate Cement Concrete

2020年2期

石膏；铝酸钙水泥混凝土；力学性能；耐久性能

Calcium sulfate; Calcium aluminate cement concrete; Mechanical properties; Durability

2020年2期

10.19761/j.1000-4637.2020.02.024.05

河南省科技攻关项目（192102310510）。

李亚丽1，赵兰英1，张舜泉2

1.商丘工学院土木工程学院，476000；2.东南大学材料科学与工程学院，南京211189

李亚丽1，赵兰英1，张舜泉2

关键词：石膏；铝酸钙水泥混凝土；力学性能；耐久性能

Key words：Calcium sulfate; Calcium aluminate cement concrete; Mechanical properties; Durability

期刊：2020年2期 No.286 P24-27+31

DOI：10.19761/j.1000-4637.2020.02.024.05

基金项目：河南省科技攻关项目（192102310510）

作者：李亚丽1，赵兰英1，张舜泉2

单位：1.商丘工学院土木工程学院，476000；2.东南大学材料科学与工程学院，南京211189

李亚丽,赵兰英,张舜泉.石膏对铝酸钙水泥混凝土力学与耐久性能的影响[J].混凝土与水泥制品,2020(2):24-27,41.

LI Y L,ZHAO L Y,ZHANG S Q.Effect of CaSO4 on Mechanical Properties and Durability of Calcium Aluminate Cement Concrete[J].China Concrete and Cement Products,2020(2):24-27,41.

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1000

摘要：用二水石膏（CaSO4·2H2O）和α型半水石膏（α-CaSO4·0.5H2O）粉末分别部分取代铝酸钙水泥（CAC）制备了CAC混凝土，研究了其在不同掺量下对CAC混凝土力学与耐久性能的影响。试验研究了CAC混凝土试样的抗压强度、劈裂抗拉强度、氯离子渗透性以及抗硫酸盐的侵蚀性能，探究了CaSO4类型和掺量对各项指标的影响。结果表明，掺入CaSO4会降低CAC混凝土的早期强度，但可显著抑制其后期强度衰减，当CaSO4·2H2O和α-CaSO4·0.5H2O掺量分别为6%和4%时，CAC混凝土的后期强度衰减量最低，Cl-扩散系数最小，且在Na2SO4侵蚀溶液中劣化程度最低。因此，CaSO4·2H2O和α-CaSO4·0.5H2O均可有效改善CAC混凝土的力学性能与耐久性能，两者的最优掺量分别为6%和4%。 Abstract: Theeffectof CaSO4 withvariouscontentsonmechanicalpropertiesanddurabilityofcalciumaluminatecement(CAC)concretewasinvestigatedbypartiallysubstitutingCACpowderwithdihydrate(CaSO4·2H2O)andα-hemihydrate(α-CaSO4·0.5H2O).TheperformancesoftheCACconcretesampleswithdifferentmixingproportionsweretested,includingthecompressivestrength,splittingtensilestrength,chlorideionspenetrability,andsulfatecorrosionresistance.Also,theinfluenceofthetypeandamountof CaSO4 onsuchpropertieswasdiscussed.TheresultsshowthattheearlystrengthofCACconcretecanbereducedduetotheincorporationof CaSO4,whereastheattenuationoftheirlaterstrengthmaybeevidentlyinhibited.Whenthecontentsof CaSO4·2H2Oandα-CaSO4·0.5H2O are6%and4%,respectively,thestrengthattenuationofCACconcretereachestheminimum,andtheminimumchlorideionspermeabilitycoefficientisobserved.ThesulfatecorrosionresistanceofCACconcretecanbeobviouslyenhancedbyincorporating CaSO4.Specifically,whentheamountsof CaSO4·2H2O andα-CaSO4·0.5H2O areequalto6%and4%,respectively,thedeteriorationdegreeofCACconcreteexposedtoNa2SO4solutionisthelowest.Therefore,theincorporationof CaSO4·2H2O andα-CaSO4·0.5H2O canimprovegreatlythemechanicalpropertiesanddurabilityofCACconcrete,andtheoptimumcontentsofthetwotypeof CaSO4 are6%and4%,respectively.

英文名 : Effect of CaSO4 on Mechanical Properties and Durability of Calcium Aluminate Cement Concrete

刊期 : 2020年2期

关键词 : 石膏；铝酸钙水泥混凝土；力学性能；耐久性能

Key words : Calcium sulfate; Calcium aluminate cement concrete; Mechanical properties; Durability

刊期 : 2020年2期

DOI : 10.19761/j.1000-4637.2020.02.024.05

文章编号 :

基金项目 : 河南省科技攻关项目（192102310510）。

作者 : 李亚丽1，赵兰英1，张舜泉2

单位 : 1.商丘工学院土木工程学院，476000；2.东南大学材料科学与工程学院，南京211189

李亚丽1，赵兰英1，张舜泉2

关键词：石膏；铝酸钙水泥混凝土；力学性能；耐久性能

Key words：Calcium sulfate; Calcium aluminate cement concrete; Mechanical properties; Durability

期刊：2020年2期 No.286 P24-27+31

DOI：10.19761/j.1000-4637.2020.02.024.05

基金项目：河南省科技攻关项目（192102310510）

作者：李亚丽1，赵兰英1，张舜泉2

单位：1.商丘工学院土木工程学院，476000；2.东南大学材料科学与工程学院，南京211189

李亚丽,赵兰英,张舜泉.石膏对铝酸钙水泥混凝土力学与耐久性能的影响[J].混凝土与水泥制品,2020(2):24-27,41.

LI Y L,ZHAO L Y,ZHANG S Q.Effect of CaSO4 on Mechanical Properties and Durability of Calcium Aluminate Cement Concrete[J].China Concrete and Cement Products,2020(2):24-27,41.

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摘要

参数

结论

参考文献

引用本文

摘要：用二水石膏（CaSO₄·2H₂O）和α型半水石膏（α-CaSO₄·0.5H₂O）粉末分别部分取代铝酸钙水泥（CAC）制备了CAC混凝土，研究了其在不同掺量下对CAC混凝土力学与耐久性能的影响。试验研究了CAC混凝土试样的抗压强度、劈裂抗拉强度、氯离子渗透性以及抗硫酸盐的侵蚀性能，探究了CaSO₄类型和掺量对各项指标的影响。结果表明，掺入CaSO₄会降低CAC混凝土的早期强度，但可显著抑制其后期强度衰减，当CaSO₄·2H₂O和α-CaSO₄·0.5H₂O掺量分别为6%和4%时，CAC混凝土的后期强度衰减量最低，Cl^-扩散系数最小，且在Na₂SO₄侵蚀溶液中劣化程度最低。因此，CaSO₄·2H₂O和α-CaSO₄·0.5H₂O均可有效改善CAC混凝土的力学性能与耐久性能，两者的最优掺量分别为6%和4%。

Abstract: The effect of CaSO₄ with various contents on mechanical properties and durability of calcium aluminate cement (CAC) concrete was investigated by partially substituting CAC powder with dihydrate (CaSO₄·2H₂O) and α-hemihydrate (α-CaSO₄·0.5H₂O). The performances of the CAC concrete samples with different mixing proportions were tested, including the compressive strength, splitting tensile strength, chloride ions penetrability, and sulfate corrosion resistance. Also, the influence of the type and amount of CaSO₄ on such properties was discussed. The results show that the early strength of CAC concrete can be reduced due to the incorporation of CaSO₄, whereas the attenuation of their later strength may be evidently inhibited. When the contents of CaSO₄·2H2O and α-CaSO₄·0.5H₂O are 6% and 4%, respectively, the strength attenuation of CAC concrete reaches the minimum, and the minimum chloride ions permeability coefficient is observed. The sulfate corrosion resistance of CAC concrete can be obviously enhanced by incorporating CaSO₄. Specifically, when the amounts of CaSO₄·2H₂O and α-CaSO₄·0.5H₂O are equal to 6% and 4%, respectively, the deterioration degree of CAC concrete exposed to Na2SO4 solution is the lowest. Therefore, the incorporation of CaSO₄·2H₂O and α-CaSO₄·0.5H₂O can improve greatly the mechanical properties and durability of CAC concrete, and the optimum contents of the two type of CaSO₄ are 6% and 4%, respectively.

关键词:

石膏；铝酸钙水泥混凝土；力学性能；耐久性能

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石膏对铝酸钙水泥混凝土力学与耐久性能的影响

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