偏高岭土对模拟商混站强碱性废泥基人造石强度的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (6): 2024-2030.

所属专题：资源综合利用

偏高岭土对模拟商混站强碱性废泥基人造石强度的影响

史伟超¹, 戚栋^1,2, 赵轶², 山晓莉¹, 张文军¹

1.中国矿业大学化工学院,徐州 221116;
2.湖州上建混凝土有限公司,湖州 313000

收稿日期:2022-01-13 修订日期:2022-04-01 出版日期:2022-06-15 发布日期:2022-07-01
通信作者: 张文军,博士,研究员。E-mail:zwjcumt@cumt.edu.cn
作者简介:史伟超(1995—),男,硕士研究生。主要从事矿物资源化综合利用方面的研究。E-mail:2986791837@qq.com
基金资助:
国家自然科学基金(51972337)

Influence of Metakaolin on Strength of Strong Alkaline Waste Mud-Based Artificial Stone in Simulated Commercial Concrete Mixing Plants

SHI Weichao¹, QI Dong^1,2, ZHAO Yi², SHAN Xiaoli¹, ZHANG Wenjun¹

1. School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China;
2. Huzhou Shangjian Concrete Co., Ltd., Huzhou 313000, China

Received:2022-01-13 Revised:2022-04-01 Online:2022-06-15 Published:2022-07-01

摘要/Abstract

摘要： 为实现商混站强碱性废泥的资源化利用,以实验室模拟的商混站强碱性废泥为对象进行人造石制备研究,探究了偏高岭土掺量及水灰比对人造石强度的影响规律及机理,并借助XRD和SEM分析了人造石的物相组成及微观形貌。结果表明:添加偏高岭土可以显著提高人造石的固结强度,当偏高岭土掺量为6%(质量分数)时抗压强度增幅最大,相对于对照组,14 d、28 d强度增长率分别为18.2%、20.3%;随着水灰比的增加,人造石抗压强度呈先增大后减小的趋势,14 d、28 d的抗压强度分别在水灰比为0.44、0.46时达到最大,分别为44 MPa、46 MPa。

关键词: 强碱性废泥, 人造石, 火山灰反应, 偏高岭土, 抗压强度, 微观机理

Abstract: In order to utilize the strong alkaline waste mud in commercial concrete mixing plants, the artificial stone was prepared from strong alkaline waste mud of commercial concrete mixing plants simulated in laboratory. The influences and mechanism of metakaolin content and water-cement ratio on the strength of artificial stone were studied in detail. The phase composition and microstructure of artificial stone were analyzed by XRD and SEM. The results show that the addition of metakaolin significantly increases the compressive strength of artificial stone. The compressive strength increases most when the content of metakaolin is 6% (mass fraction), and the strength growth rates at 14 d and 28 d are 18.2% and 20.3%, respectively. The compressive strength of artificial stone increases first and then decreases with the increase of the water-cement ratio. The compressive strength at 14 d and 28 d reaches the maximum when the water-cement ratio is 0.44 and 0.46, reaching 44 MPa and 46 MPa, respectively.

Key words: strong alkaline waste mud, artificial stone, pozzolanic reaction, metakaolin, compressive strength, micro-mechanism

中图分类号:

TU528.09

史伟超, 戚栋, 赵轶, 山晓莉, 张文军. 偏高岭土对模拟商混站强碱性废泥基人造石强度的影响[J]. 硅酸盐通报, 2022, 41(6): 2024-2030.

SHI Weichao, QI Dong, ZHAO Yi, SHAN Xiaoli, ZHANG Wenjun. Influence of Metakaolin on Strength of Strong Alkaline Waste Mud-Based Artificial Stone in Simulated Commercial Concrete Mixing Plants[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 2024-2030.

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偏高岭土对模拟商混站强碱性废泥基人造石强度的影响

Influence of Metakaolin on Strength of Strong Alkaline Waste Mud-Based Artificial Stone in Simulated Commercial Concrete Mixing Plants

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