蒸压粉煤灰砖砌体砂浆强度现场检测技术试验研究

发布时间：2018-02-15 06:27

本文关键词： 蒸压粉煤灰砖水泥混合砂浆砂浆强度贯入法点荷法对比试验　出处：《沈阳建筑大学》2013年硕士论文　论文类型：学位论文

【摘要】：蒸压粉煤灰砖是目前我国重点推广的墙体建筑材料之一,在辽宁地区和其他省市对材料力学性能都进行了大量的试验研究,但国内对于蒸压粉煤灰砖等非烧结类砖砌体砂浆抗压强度的现场检测研究并不多,相关国家标准和行业标准中主要是介绍对烧结砖砌筑砂浆强度的现场检测技术。近几年由于此材料的大力推广,在现场检测过程中检测此种砖的砌筑砂浆强度时没有相关标准规范作为检测依据。由于上述原因和现状,进行了水泥混合砂浆砌筑的蒸压粉煤灰砖砌体的砌筑砂浆强度检测试验,在本文中介绍了试验过程和试验结果。本次试验,以同条件养护标准砂浆试块抗压强度代表墙体砂浆现龄期抗压强度,基于规范选取工程检测上常用的贯入法、点荷法检测水泥混合砂浆砌筑的蒸压粉煤灰砖砌体砂浆强度进行验证性试验研究,同时,将试验结果与规范测强曲线进行对比,对于误差较大的检测方法,需要重新回归或者修正原测强曲线。同时砌筑少量烧结砖墙进行对比。本文对试验数据离散较大的数据进行剔除后,进行了统计分析,其中贯入法试验数据的平均相对误差和相对标准差均能符合规范要求,可以认为贯入法测强适用于混合砂浆砌筑的蒸压粉煤灰砖砌体的砂浆强度检测；点荷法数据经比较后发现,蒸压粉煤灰砖的实际结果均要小于规范的推定值,因此对数据进行了分类并与规范测强曲线比较,提出了精度较高的修正公式。
[Abstract]:Autoclaved pulverized coal brick is one of the most important wall building materials in China. A large number of experimental studies have been carried out on the mechanical properties of materials in Liaoning and other provinces and cities. However, there are few researches on the field test of compressive strength of non-sintered brick masonry such as autoclaved pulverized coal brick in China. The related national standards and industry standards mainly introduce the field testing technology for the strength of sintered brick masonry mortar. In recent years, due to the popularization of this material, The masonry mortar strength of this kind of brick is tested in the process of field inspection without relevant standard and specification as the basis of the inspection. Because of the above reasons and present situation, The test of masonry strength of autoclaved pulverized coal brick masonry with cement mixed mortar is carried out. The test process and test results are introduced in this paper. In this experiment, the compressive strength of the standard mortar under the same condition is used to represent the compressive strength of the wall mortar in its current age. Based on the selection of specifications, the commonly used penetration method in engineering inspection is selected. The strength of autoclaved pulverized coal brick masonry masonry masonry with cement mixed mortar is tested by point loading method. At the same time, the test results are compared with the standard strength measurement curve. The original strength curve needs to be regressed or revised. A small number of sintered brick walls are also built for comparison. In this paper, the test data are eliminated and the average relative error and the relative standard deviation of the penetration test data can meet the requirements of the specification. It can be considered that the strength measurement by penetration method is suitable for the mortar strength test of autoclaved pulverized coal brick masonry built with mixed mortar, and the actual results of autoclaved fly ash brick are all smaller than the predicted values of the specification after comparing the data of point loading method. Therefore, the data are classified and compared with the standard strength curve, and a correction formula with high accuracy is proposed.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU522.1;TU578.1

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