膨润土浆钢渣泡沫混凝土的配合比设计及孔隙结构分析  

Proportion Design and Pore Structure Analysis of Bentonite Slurry Steel Slag Foam Concrete

作　　者：项国圣[1] 黄哲 邵飞洋 周殷康 XIANG Guo-sheng;HUANG Zhe;SHAO Fei-yang;ZHOU Yin-kang(College of Civil Engineering and Architecture,Anhui University of Technology,Ma’anshan Anhui 243032,China)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032

出　　处：《铜陵学院学报》2025年第1期101-106,共6页Journal of Tongling University

基　　金：安徽省自然科学基金“基于分形理论的碱性溶液作用下膨润土膨胀特性及其计算模型”(2208085MD98)。

摘　　要：以1.18mm粒径钢渣作为细骨料制备泡沫混凝土,在制备过程中掺入膨润土浆,研究配合比对泡沫混凝土力学性能的影响。结果表明,随着钢渣和膨润土浆掺入量的增加,泡沫混凝土抗压强度先增大后减小,适当地掺入钢渣和膨润土浆可以提升泡沫混凝土的抗压强度。通过7d无侧限抗压强度确定出最优配合比为:膨润土浆土水比1:15、钢渣掺量为10%(占水泥和骨料的质量分数)、膨润土浆质量分数(占水泥、水和骨料的质量分数)5%。基于SEM测试结果发现,抗压强度的变化与孔隙结构变化基本一致,表现出平均孔径越小,孔隙结构越均匀,抗压强度越大。因此,适量掺入钢渣和膨润土浆可以优化泡沫混凝土的孔隙结构,增强其强度特性。Foam concrete was synthesized with steel slag having a particle size of 1.18 mm as fine aggregate.Bentonite slurry was incorporated during the preparation process to investigate the influence of mixing ratios on the mechanical properties of foam concrete.The results show that as the proportions of steel slag and bentonite slurry increase,the compressive strength of foam concrete initially rises and then declines;thus,an optimal addition of both materials can enhance its compressive strength.Based on the unconfined compressive strength measurements taken after 7 days,the ideal mixing ratio was determined as follows:a soil-water ratio for bentonite slurry at 1:15,with steel slag content at 10%(relative to the mass fraction of cement and aggregate),and a bentonite slurry mass fraction at 5%(relative to the total mass fraction including cement,water,and aggregate).SEM test results indicate that variations in compressive strength are closely related to changes in pore structure;specifically,smaller average pore diameters correspond to more uniform pore structures and higher compressive strengths.Therefore,appropriate addition of steel slag and bentonite slurry can optimize the pore structure of foam concrete and enhance its strength characteristics.

关 键 词：钢渣 膨润土浆 泡沫混凝土 抗压强度 孔隙结构 

分 类 号：TU528.2[建筑科学—建筑技术科学]