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李秋香^{1,2,3 ,} 刘玉珍¹ , 郑    杰¹ , 谢    晖^1,2

 

(1. 江西工业贸易职业技术学院 , 南昌   330038;2. 江西省教育厅粮油智能检测与加工运输装备重点实验室 , 南昌   330038;3. 南昌市汽车及装备工业视觉智能感知与检测重点实验室 , 南昌   330038)

摘  要: 为有效提高泡沫混凝土的防水和保温性能 , 以二级粉煤灰 CFA 为原料 , 使用疏水改性剂 GSK 和分散剂 FST 对其进行改性处理 , 制备出一种改性粉煤灰 G-CFA, 采用扫描电镜 、红外光谱以及 XRD 谱图对其结构进行了表征 , 并对比评价了 CFA 和 G-CFA 对泡沫混凝土力学 、防水以及保温性能的影响 。结果表明 : 粉煤灰经改性处理后表面形貌和有机官能团均发生了明显的改变 , 疏水性能得到改善 。改性粉煤灰 G-CFA 的掺入虽然可使泡沫混凝土的力学性能有所减弱 , 但可有效提升其防水性能和保温性能 。推荐 G-CFA 的最佳质量分数为15% , 此时泡沫混凝土的抗压强度仍可达 3. 72 MPa, 吸水率低至 20. 8% , 导热系数低至 0. 031 W/ (m ·K) , 泡沫混凝土的综合性能较好 。在相同的掺量条件下 , 改性粉煤灰 G-CFA 对泡沫混凝土力学性能 、防水性能和保温性能的影响明显优于粉煤灰 CFA。为提高泡沫混凝土的综合性能提供一定参考。

关键词: 高性能泡沫混凝土 ; 改性粉煤灰 ; 防水性能 ; 力学性能 ; 保温性能

中图分类号: TU528      文献标志码: A      文章编号: 1005-8249 (2026) 05-0008-06

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 05. 002

LI Qiuxiang^{1,2,3 ,} LIU Yuzhen¹ , ZHENG Jie¹ , XIE Hui^1,2

(1. Jiangxi Vocational Technical College of Industry & Trade, Nanchang 330038, China;

2. Key Laboratory of Grain and Oil Intelligent Testing and Processing Transportation Equipment , Jiangxi Provincial Department of Education, Nanchang 330038, China;

3. Nanchang Key Laboratory of Industry Visual Intelligence Perception and Inspection for Automotive and Equipment , Nanchang, Jiangxi 330038, China)

Abstract : In order to effectively improve the waterproof and thermal insulation properties of foam concrete, a modified fly ash G-CFA was prepared by using secondary fly ash CFA as raw material, hydrophobic modifier GSK and dispersant FST to modify it. Its structure was characterized by scanning electron microscope, infrared spectrum and XRD spectrum, and the effects of CFA and G-CFA on the mechanical, waterproof and thermal insulation properties of foam concrete were compared and evaluated. The results showed that the surface morphology and organic functional groups of fly ash were significantly changed after modification treatment, and the hydrophobicity was improved.  The addition of modified fly ash G - CFA can weaken the mechanical properties of foam concrete, but can effectively improve its waterproof performance and thermal insulation performance. The optimal mass fraction of G-CFA is recommended to be 15%. At this time, the compressive strength of foam concrete can still reach 3. 72 MPa, the water absorption rate is as low as 20. 8% , and the thermal conductivity is as low as 0. 031 W/ (m · K). The comprehensive performance of foam concrete is good.  In addition, the effect of modified fly ash G-CFA on the mechanical properties, waterproof properties and thermal insulation properties of foam concrete is significantly better than that of fly ash CFA at the same dosage.  To offer some reference for enhancing the comprehensive performanced of foamed concrete.

Key words: high performance foam concrete; modified fly ash; waterproof performance; mechanical properties; thermal insulation performance

项目来源 : 江西省教育厅重点科技项目 (GJJ2506901) ; 国家粮食和物资储备局软科学研究项目 (GLRKX2026082) ; 江西省教育厅青年科技项目 (GJJ2506902; GJJ2407104)。

作者简介 : 李秋香 (1986—) , 女, 博士, 讲师, 研究方向 : 绿色建筑材料。

收稿日期 : 2025-12-02