基于正交试验下水温对泡沫混凝土性能的影响

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (2): 28-33.

基于正交试验下水温对泡沫混凝土性能的影响

王军^*1, 王鑫琦¹, 郭宏杰¹, 杜杭威²

1.甘肃建投住宅产业新型材料有限公司, 甘肃兰州 730300;
2.兰州理工大学土木工程学院, 甘肃兰州 730050

收稿日期:2021-11-09 出版日期:2022-04-28 发布日期:2022-05-07
通讯作者: 王军(1982-),男,甘肃临洮人,高级工程师.Email:wj890@qq.com
基金资助:
甘肃省住房和城乡建设厅项目(JK2019-40)

Effect of water temperature on the performance of foam concrete based on orthogonal experiment

WANG Jun¹, WANG Xin-qi¹, GUO Hong-jie¹, DU Hang-wei²

1. Gansu Construction Investment Housing Industry New Material Co., Ltd, Lanzhou 730300;
2. School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050

Received:2021-11-09 Online:2022-04-28 Published:2022-05-07

摘要/Abstract

摘要： 为了排除多因素对试验结果产生的误差,研究了不同用水温度对泡沫混凝土性能和内部孔隙的影响,设置正交试验(三因素三水平)得出最佳的水胶比为0.6、粉煤灰最佳掺量为15%,胶粉最佳掺量为2%.在此基础上设置七个不同的水温温度(15、20、25、30、35、40、45 ℃),通过采集泡沫混凝土试件抗压强度、干密度、吸水率试验数据以及内部形貌微观数据,研究了水温对泡沫混凝土主要物理、力学性能和内部孔径的影响.结果表明:泡沫混凝土的抗压强度、干密度、吸水率与水温之间存在数值关系,各物理、力学性能之间存在相关性.当发泡水温为30、35 ℃时,泡沫混凝土发泡效果最好.泡沫混凝土内部连通孔数量较少、孔径大小均匀、孔隙率高、平均孔径约为1.9 mm,同时物理、力学性能满足规范要求.

关键词: 泡沫混凝土, 发泡水温, 孔径, 干密度, 抗压强度, 因素相关性

Abstract: In order to eliminate the error caused by multiple factors on the test results, the effect of different preparation water temperatures on the performance and internal pores of the foamed concrete was studied. The orthogonal test (three factors and three levels) was set, and the optimal water binder ratio is 0.6, the optimal content of fly ash is 15%, and the optimal content of rubber powder is 2%. Seven different water temperatures(15、20、25、30、35、40、45 ℃) were set on above basis, and theeffect of water temperature on the main physical and mechanical properties and internal pore size of foam concrete was studied by collecting the experimental data of compressive strength, dry density, water absorption of foam concrete specimens and micro data of internal morphology. The test results showed that there is a numerical relationship between the compressive strength, dry density, water absorption and water temperature of the foam concrete, and there is a correlation between the physical and mechanical properties. When the foaming water temperature is 30℃ and 35℃, the foamed concrete has the best foaming effect. The number of interconnected pores in the foamed concrete is small, the pore size is uniform, the porosity is high, the average pore size is about 1.9mm, and the physical and mechanical properties meet the requirements of the specification.

Key words: foamed concrete, foaming water temperature, pore size, dry density, compressive strength, factor correlation

中图分类号:

TB321

王军, 王鑫琦, 郭宏杰, 杜杭威. 基于正交试验下水温对泡沫混凝土性能的影响[J]. 兰州理工大学学报, 2022, 48(2): 28-33.

WANG Jun, WANG Xin-qi, GUO Hong-jie, DU Hang-wei. Effect of water temperature on the performance of foam concrete based on orthogonal experiment[J]. Journal of Lanzhou University of Technology, 2022, 48(2): 28-33.

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