基于磷石膏基细轻骨料的砂浆性能研究

doi:10.16552/j.cnki.issn1001-1625.2024.1299

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (4): 1420-1427.DOI: 10.16552/j.cnki.issn1001-1625.2024.1299

基于磷石膏基细轻骨料的砂浆性能研究

任骏^1,2, 余永昆¹, 毛雯婷³, 张毓¹, 王大富^1,2

1.云南大学建筑与规划学院,昆明 650000;
2.云南省碳中和绿色低碳技术重点实验室,昆明 650000;
3.云南省建筑科学院有限公司,昆明 650000

收稿日期:2024-10-30 修订日期:2024-12-17 出版日期:2025-04-15 发布日期:2025-04-18
通信作者: 王大富,博士,讲师。E-mail:wangdafu92@163.com
作者简介:任骏(1986—),男,博士,教授。主要从事水泥基材料的研究。E-mail:renjunking@aliyun.com
基金资助:
国家自然科学基金(52278256,52168038)

Performance of Mortar Based on Phosphogypsum-Based Fine Lightweight Aggregate

REN Jun^1,2, YU Yongkun¹, MAO Wenting³, ZHANG Yu¹, WANG Dafu^1,2

1. School of Architecture and Planning, Yunnan University, Kunming 650000, China;
2. Yunnan Province Key Laboratory of Carbon Neutrality, Green and Low Carbon Technology, Kunming 650000, China;
3. Yunnan Academy of Building Sciences Co., Ltd., Kunming 650000, China

Received:2024-10-30 Revised:2024-12-17 Published:2025-04-15 Online:2025-04-18

摘要/Abstract

摘要： 利用激发剂、矿渣粉、磷石膏(PG)制备磷石膏基细轻骨料(PG-LWA)是回收利用PG的有效途径之一。本文介绍了PG-LWA的制备方法,从物理性能、强度和微观结构等方面对PG-LWA的质量进行了评估;将PG-LWA用于制备水泥砂浆,并测试砂浆试样的扩展度、凝结时间和力学性能。结果表明,在制备PG-LWA时,原材料发生碱激发反应生成了水化硅酸钙(C-S-H)和钙矾石(AFt)等物质,当PG质量分数为70%时,制备得到的PG-LWA的细度模数为4.4,干燥状态下的筒压强度为4.65 MPa,孔隙率为37.29%。当水胶比为0.5、PG质量分数为70%时,用PG-LWA全部替代砂子制备的水泥砂浆的扩展度为213 mm,终凝时间为300 min,28 d抗压强度为22.1 MPa。

关键词: 磷石膏, 人造骨料, 砂浆, 力学性能, 微观结构

Abstract: The preparation of phosphogypsum-based fine lightweight aggregate (PG-LWA) by using activator, slag powder and phosphogypsum (PG) is one of the effective ways to recycle PG. In this paper, the preparation method of PG-LWA was introduced, and the quality of PG-LWA was evaluated from the aspects of physical properties, strength and microstructure. PG-LWA was used to prepare cement mortar, and the expansion, setting time and mechanical properties of mortar samples were tested. The results show that during the preparation of PG-LWA, the raw materials undergo alkali activation reaction to form hydrated calcium silicate (C-S-H) and ettringite (AFt). When the mass fraction of PG is 70%, the fineness modulus of the prepared PG-LWA is 4.4, the cylinder compressive strength at over dry is 4.65 MPa, and the porosity is 37.29%. When the water-binder ratio is 0.5 and the mass fraction of PG is 70%, the expansion degree of cement mortar prepared by replacing sand with PG-LWA is 213 mm, the final setting time is 300 min, and the 28 d compressive strength is 22.1 MPa.

Key words: phosphogypsum, artificial aggregate, mortar, mechanical property, microstructure

中图分类号:

TU528

任骏, 余永昆, 毛雯婷, 张毓, 王大富. 基于磷石膏基细轻骨料的砂浆性能研究[J]. 硅酸盐通报, 2025, 44(4): 1420-1427.

REN Jun, YU Yongkun, MAO Wenting, ZHANG Yu, WANG Dafu. Performance of Mortar Based on Phosphogypsum-Based Fine Lightweight Aggregate[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1420-1427.

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基于磷石膏基细轻骨料的砂浆性能研究

Performance of Mortar Based on Phosphogypsum-Based Fine Lightweight Aggregate

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