引气剂和沙漠砂对混凝土性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (7): 2321-2326.

引气剂和沙漠砂对混凝土性能的影响

吕胜辉¹, 沙吾列提·拜开依^1,2, 阿力马斯·叶尔布拉提¹, 覃森¹

1.新疆大学建筑工程学院,乌鲁木齐 830017;
2.新疆建筑结构与抗震重点实验室,乌鲁木齐 830017

收稿日期:2022-02-23 修回日期:2022-04-09 出版日期:2022-07-15 发布日期:2022-08-01
通讯作者: 沙吾列提·拜开依,教授。E-mail:jgxyswlt@xju.edu.cn
作者简介:吕胜辉(1996—),男,硕士研究生。主要从事沙漠砂混凝土方向的研究。E-mail:1948578841@qq.com
基金资助:
国家自然科学基金(51668059)

Effects of Air-Entraining Agent and Desert Sandon Properties of Concrete

LYU Shenghui¹, Sawulet·BEKEY^1,2, Almas·YERBOLAT¹, QIN Sen¹

1. College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830017, China;
2. Xinjiang Key Lab of Building Structure and Earthquake Resistance, Urumqi 830017, China

Received:2022-02-23 Revised:2022-04-09 Online:2022-07-15 Published:2022-08-01

摘要/Abstract

摘要： 为探究沙漠砂替代率与引气剂掺量两者对C30混凝土的影响,将沙漠砂(6种掺量)与引气剂(5种掺量)定量组合掺入混凝土中,测定其对新拌混凝土含气量、坍落度、经1 h含气量以及28 d抗压强度的影响规律。试验结果得出:沙漠砂对新拌引气混凝土含气量有一定的抑制作用,并且随着沙漠砂替代率增加,抑制作用不断增强,但对经1 h引气混凝土的含气量影响并不明显。随着引气剂掺量和沙漠砂替代率的增加,混凝土的坍落度与28 d抗压强度均呈先增大后减小的趋势,当沙漠砂替代率为40%(质量分数)、引气剂掺量为0.002%(质量分数)时,抗压强度达到最大值。合理地将引气剂与沙漠砂组合后掺入混凝土中,其工作性能与抗压强度都会有显著提升。

关键词: 混凝土, 沙漠砂, 引气剂, 含气量, 经1 h含气量, 坍落度, 抗压强度

Abstract: In order to investigate the effects of desert sand replacement rate and air-entraining agent dosage on C30 concrete, desert sand (six replacement rates) and air-entraining agent (five dosages) were mixed into concrete in quantitative combinations to determine their effects on the air content of fresh concrete, slump, gas content after 1 h and 28 d compressive strength. The test results show that desert sand has a certain inhibitory effect on the gas content of fresh air-entrained concrete, and the inhibition effect increases with the increase of desert sand replacement rate, but it has no obvious effected on the gas content of air-entrained concrete after 1 h. With the increase of air-entraining agent dosage and desert sand replacement rate, the slump and 28 d compressive strength of concrete both increase first and then decrease. The compressive strength reaches the maximum when the replacement rate of desert sand is 40% (mass fraction) and the dosage of air-entraining agent is 0.002% (mass fraction). Reasonable combination of air-entraining agent and desert sand into concrete can significantly improve the working performance and compressive strength of concrete.

Key words: concrete, desert sand, air-entraining agent, gas content, 1 h gas content, slump, compressive strength

中图分类号:

TU528

吕胜辉, 沙吾列提·拜开依, 阿力马斯·叶尔布拉提, 覃森. 引气剂和沙漠砂对混凝土性能的影响[J]. 硅酸盐通报, 2022, 41(7): 2321-2326.

LYU Shenghui, Sawulet·BEKEY, Almas·YERBOLAT, QIN Sen. Effects of Air-Entraining Agent and Desert Sandon Properties of Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2321-2326.

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