陈红星1,戴惠兰1,贾志强1,张守治2,刘建新2,徐 文3
陈红星,戴惠兰,贾志强,等.粉煤灰、矿粉对水泥浆体变形性能的影响[J].混凝土与水泥制品,2021(3):28-31.
CHEN H X,DAI H L,JIA Z Q,et al.Influence of Fly Ash and Slag on the Deformation Performance of Cement Paste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):28-31.
粉煤灰、矿粉对水泥浆体变形性能的影响
陈红星1,戴惠兰1,贾志强1,张守治2,刘建新2,徐 文3
陈红星,戴惠兰,贾志强,等.粉煤灰、矿粉对水泥浆体变形性能的影响[J].混凝土与水泥制品,2021(3):28-31.
CHEN H X,DAI H L,JIA Z Q,et al.Influence of Fly Ash and Slag on the Deformation Performance of Cement Paste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):28-31.
摘 要:以高性能混凝土用胶凝材料为研究对象,研究了粉煤灰、矿粉在不同养护湿度和温度下对水泥浆体变形性能的影响规律。结果表明:饱水养护时,粉煤灰的掺入降低了水泥浆体的水养膨胀变形;养护温度升高、粉煤灰掺量增加,水泥浆体水养膨胀变形降低幅度增大,但不同水养温度下掺入矿粉对水泥浆体膨胀变形无明显影响;密封养护时,掺入粉煤灰可有效抑制水泥浆体的自收缩,但矿粉掺入会增大水泥浆体自收缩;干燥养护时,掺入粉煤灰对水泥浆体有一定的减缩作用,而矿粉的掺入会增大水泥浆体的干燥收缩。
Abstract: Taking the cement material for high performance concrete as the research object,the deformation of cement based materials containing fly ash and slag under different curing humidity and curing temperature was studied. Experimental results show that fly ash reduces expansion deformation of cement paste under saturated condition. When the curing temperature increases, the expansion deformation of the cement paste containing fly ash decreases. However, slag has no effect on the expansion deformation of cement paste whatever under different temperature. Fly ash can reduce the shrinkage of cement paste whatever under sealed condition or under dried condition, but the slag increases the self-shrinkage and drying shrinkage of the cement paste.
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