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王建华¹，赖益梁¹，刘刚¹，杨枫²，刘建新¹，李广生¹

（1.华东勘测设计院（福建）有限公司，福建 福州 361005；2.福建理工大学土木工程学院，福建 福州 350108）

摘 要：用煤矸石粉部分替代粉煤灰制备混凝土用复合矿物掺合料，通过正交实验研究煤矸石粉、粉煤灰、磷渣掺量对受检胶砂抗折强度、抗压强度、活性指数和强度增长比的影响。结果显示，由于火山灰效应和微集料效应，煤矸石粉、粉煤灰、磷渣对水泥的水化存在较强相互作用，设计配合比适宜时，受检胶砂的7和28 d活性指数及强度增长比均达到普通Ⅲ级复合矿物掺合料指标要求，表明用煤矸石粉部分替代粉煤灰制备混凝土用复合矿物掺合料完全可行，最优方案为煤矸石粉掺量25.0%、粉煤灰掺量62.5%、磷渣掺量12.5%。

关键词：煤矸石粉；粉煤灰；复合掺合料；混凝土；磷渣；性能

中图分类号：TU528.35              

文献标志码：A      

文章编号：1005-8249（2024）01-0018-05

DOI：10.19860/j.cnki.issn1005-8249.2024.01.004

 

WANG Jianhua¹，LAI Yiliang¹，LIU Gang¹，YANG Feng²，LIU Jianxin¹，LI Guangsheng¹

(1.East China Survey and Design Institute (Fujian) Co., Ltd., Fuzhou 361005, China;
2.School of Civil Engineering, Fujian University of Technology, Fuzhou 350108, China)

Abstract：The composite mineral admixtures for concrete were prepared by partially replacing fly ash with coal gangue powder. The effects of coal gangue powder, fly ash and phosphorus slag on the flexural strength, compressive strength, activity index and strength growth ratio of the tested mortar were studied through orthogonal experiments. The results showed that there was a strong interaction between gangue powder, fly ash and phosphorus residue on the hydration of cement, and when the design mix ratio is appropriate ,the 7-day and 28-day activity index and strength growth ratio of the tested gum sand reached the requirements of the ordinary grade III composite mineral admixture of composite admixture for concrete, indicating that it was completely feasible to prepare composite mineral admixture for concrete by replacing fly ash with gangue powder, and the optimal scheme is to add 25.0% coal gangue powder,62.5% fly ash,and 12.5% phosphorus slag.

Keywords: gangue powder, fly ash, composite admixtures, concrete, phosphorus residue;property

作者简介：王建华，（1981），男，本科，高级工程师，主要研究方向：市政、建筑工程及建筑新材料。

收稿日期：2023-01-10