- 摘 要
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（湖南大學土木工程學院， 長沙 410082）
［摘要］《建筑砂漿基本性能試驗方法標準》（JGJ/T 70—2009）對建筑砂漿立方體抗壓強度試驗中的底模作了重大的修改，為了協(xié)調(diào)和統(tǒng)一各規(guī)范對砂漿試塊底模的規(guī)定及砂漿強度的取值，總結(jié)了現(xiàn)有規(guī)范對砂漿試塊底模的規(guī)定，分析了其中存在的問題以及對實際工程產(chǎn)生的不利影響；根據(jù)底模的自身特性及底模與砂漿試塊間的相互作用，總結(jié)并分析了不同因素對砂漿試塊抗壓強度的影響?；诓煌瑝K材底模與鋼底模砂漿試塊抗壓強度比值的頻數(shù)分布，采用合理的保證率，按正態(tài)分布分析，提出了各類砌體塊材作底模時，砂漿強度的合理取值方法。
［關(guān)鍵詞］建筑砂漿； 抗壓強度； 規(guī)范； 底模； 取值方法
中圖分類號：TU522-3文獻標識碼：A文章編號：1002-848X(2019)08-0108-07
Research on the influences of different bottom dies to the compressive strength of the mortar specimen
Chen Dachuan, Wang Dingwei, Shi Chuxian
（College of Civil Engineering, Hunan University, Changsha 410082, China）
Abstract:Standard for test method of performance on building mortar (JGJ/T 70—2009)has been made major changes on the problem of bottom die in the clauses of the cube compressive strength of construction mortar. In order to coordinate and unify the stipulations about the bottom die of mortar specimen in specification and the mortar strength values, the stipulations about the bottom die of mortar specimen in the existing specifications were summarized and the existing problems and the bad impacts to the real projects were analyzed. According to the characteristics of the bottom die and the interaction between bottom die and the mortar specimen, the influences of different factors on the compressive strength of mortar specimen were summarized and analyzed. In view of the frequency distribution of the compressive strength ratio of the mortar specimen between different bottom dies and steel bottom die, using a reasonable guarantee rate, according to the normal distribution analysis, a reasonable method for determining the strength of the mortar when various types of masonry blocks are used as the bottom die was proposed.
Keywords:construction mortar; compressive strength; specification; bottom die; value method
*國家自然科學基金資助項目（50778067）。
作者簡介：陳大川,博士, 教授,Email: 13707311929@163.com。
