既有砖砌体现场砂浆强度试验研究*
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（1 长沙理工大学土木与建筑学院， 长沙 410004； 2 湖南大学土木工程学院， 长沙 410082）
［摘要］各种非烧结砖的广泛应用对砌体的现场检测提出了新的要求。本研究通过吸水动力学原理以及60个不同含水率的普通烧结砖、蒸压粉煤灰砖和蒸压灰砂砖的抽水试验，得到不同砖及不同上墙含水率时砖的吸水性指标。采用回弹法和筒压法对7片砖砌体墙现场砂浆强度进行试验研究，得到了不同砖砌体中砂浆回弹值及筒压比与吸水性指标的关系，建立了各种砖砌体现场砂浆强度与砖的吸水性指标的统一表达式，为相关标准编制提供了理论依据。［关键词］砖; 吸水性指标; 砌体; 砂浆; 现场检测; 抗压强度; 试验方法中图分类号：TU502.6 文献标识码：A 文章编号：1002-848X(2015)17-0063-04
Experimental study on in-situ strength of mortar in existing brick masonryLiang Jianguo1, Shi Liu1, Wang Tao2, Liu Zhefeng1（1 School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410004, China; 2 School of Civil Engineering, Hunan University, Changsha 410082, China）Abstract: The wide application of all kinds of non-fired brick puts forward new requirements for in-situ test of masonry. The water absorption indices of bricks of different types and with different initial moisture contents were derived based on the pumping test results of 60 common fired bricks, autoclaved fly ash bricks and autoclaved lime-sand bricks with different initial moisture content, according to the principle of absorbing water dynamics. The in-situ strength of mortar of 7 walls of brick masonry was studied with rebound method and cylinder pressure method. The relationships of the rebound value and the cylindrical pressure ratio with water absorption index of mortar of different kinds of brick masonry were obtained. A unified formula for in-situ mortar strength of different kinds of brick masonry and water absorption index of brick was set up, providing a theoretical basis for the relevant standard revision.Keywords: brick; water absorption index; masonry; mortar; in-situ test; compressive strength; test method
*建设部建标［2012］5号。作者简介：梁建国，硕士，教授，Email:jgliang1963@163.com。
