李富民++罗小雅++华慧娟++杨泰++黄朗

摘要：为了检验新型预制装配式混凝土构件嵌入式对接连接中约束垫层混凝土在拌和物状态下是否可以承受装配施工产生的压力作用，通过试验研究了约束垫层混凝土拌和物的短期受压性能，得到了不同厚度约束垫层混凝土拌和物的应力应变沉降量关系曲线，建立了随厚度变化的应力应变关系经验模型。通过与成熟混凝土对比，分析了约束垫层混凝土拌和物的受压性能；通过对受压过程中水分流失情况的分析，讨论了约束垫层混凝土拌和物后期强度发展。结果表明：约束垫层混凝土拌和物具有良好的、可控的短期受压性能，能够满足装配施工需求。

关键词：预制装配；混凝土构件；约束垫层；混凝土拌和物；受压性能

中图分类号：TU375文献标志码：A

Shortterm Compression Performance of Restrained Cushion Concrete

Mixture Used in Assembling ConstructionLI Fumin1， LUO Xiaoya1， HUA Huijuan2，YANG Tai1， HUANG Lang1

（1. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering， China University of

Mining and Technology， Xuzhou 221116， Jiangsu， China； 2. Management Committee of Binjiang Fine

Chemical Industry Park of Jiangsu Qidong Economic Development Zone，

Nantong 226221， Jiangsu， China）Abstract： In order to test whether the restrained cushion concrete in new type embedded connection of precast assembling concrete members could bear the compression force caused by assembly construction， the shortterm compression performance of restrained cushion concrete mixture was studied through the tests， and the stressstrainsettlement curves of the restrained cushion concrete mixture with different thicknesses were obtained， then the stressstrain empirical model varied with different thicknesses was built. By comparing with the matured concrete， the compression performance of restrained cushion concrete mixture was analyzed.By analyzing the water loss in the process of compression， the development of the compressive strength of restrained cushion concrete mixture was discussed.The result shows that restrained cushion concrete mixture has a nice and controllable shortterm compression performance， and can satisfy the requirement of assembling construction.

Key words： precast assembling； concrete member； restrained cushion； concrete mixture； compression performance

0引言

随着可持续发展和节能环保要求的不断提高，加之建筑业劳动力成本持续增加，以预制装配式混凝土结构体系为代表的建筑工业化得到了越来越多的重视，其应用逐渐升温[13]。

预制构件之间的连接对于预制混凝土结构的装配施工性能和服役力学性能的影响至关重要[47]，因此深入研究预制混凝土结构的连接方式对建筑工业化发展有着重要意义。

各国关于预制构件连接的设计规范/规程不同[815]，导致其连接方式的分类也各不相同，但是基于施工方法不同而分类的干连接和湿连接体系已被广泛使用。考虑到抗震性能上的差异[1618]，现阶段湿连接运用更为广泛。……