矿粉和粉煤灰掺量对可控性低强度材料(CLSM)性能的影响

doi:10.16552/j.cnki.issn1001-1625.2024.1430

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (5): 1726-1733.DOI: 10.16552/j.cnki.issn1001-1625.2024.1430

矿粉和粉煤灰掺量对可控性低强度材料(CLSM)性能的影响

王宁宁^1,2, 胡康飞³, 包益鋆¹, 张文文¹, 卜静武³, 陈徐东⁴

1.江苏三合建环保技术研究院有限公司,南京 210000;
2.河海大学力学与工程科学学院,南京 211100;
3.扬州大学水利科学与工程学院,扬州 225009;
4.河海大学土木与交通学院,南京 210024

收稿日期:2024-11-21 修订日期:2025-01-16 发布日期:2025-05-20
通信作者: 包益鋆,助理工程师。E-mail:byj990123@163.com
作者简介:王宁宁(1986—),男,博士,高级工程师。主要从事固废材料的研究。E-mail:shjhb001@163.com
基金资助:
国家自然科学基金(52379124)

Influences of Ground Granulated Blast Furnace Slag and Fly Ash Dosages on Performance of Controlled Low Strength Materials (CLSM)

WANG Ningning^1,2, HU Kangfei³, BAO Yijun¹, ZHANG Wenwen¹, BU Jingwu³, CHEN Xudong⁴

1. Jiangsu Sanhejian Environmental Technology Research Institute Co., Ltd, Nanjing 210000, China;
2. College of Mechanics and Engineering Science, Hohai University, Nanjing 211100, China;
3. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China;
4. College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, China

Received:2024-11-21 Revised:2025-01-16 Online:2025-05-20

摘要/Abstract

摘要： 利用砂质土与装修垃圾掺配不同比例的矿粉(GGBS)和粉煤灰(FA)制备可控性低强度材料(CLSM),研究了GGBS和FA掺量对CLSM流动值、泌水率、凝结时间和抗压强度的影响。通过XRD和SEM探究了不同GGBS和FA掺量对CLSM物相组成和微观形貌的影响。结果表明,GGBS和FA的掺量增加,利用装修垃圾、砂质土制成的CLSM泌水率减少,凝结时间缩短,FA掺量不变,GGBS从150 g增加到270 g,CLSM的3 d抗压强度从2.01 MPa增加到4.00 MPa,28 d抗压强度从6.83 MPa增加到11.12 MPa。GGBS掺量不变,FA从120 g增加到240 g,3 d抗压强度从2.41 MPa增加到3.13 MPa,28 d抗压强度从6.65 MPa增加到10.24 MPa。GGBS和FA的掺量增加使CLSM内部产生了大量水化硅酸钙(C-S-H)和水化硅铝酸钙(C-A-S-H)等水化产物,增加了密实性。

关键词: 可控性低强度材料, 矿粉, 粉煤灰, 抗压强度, 微观结构

Abstract: Controlled low strength materials (CLSM) were prepared by using different proportions of ground granulated blast furnace slag (GGBS) and fly ash (FA) mixed with sandy soil and decoration wastes. This paper studied the influences of GGBS and FA dosages on the fluidity, bleeding rate, setting time and compressive strength of CLSM. The effects of GGBS and FA dosages on the phase composition and micromorphology of CLSM were explored by XRD and SEM. The results show that with the increase of GGBS and FA in CLSM, the bleeding rate decreases, and the setting time shortens. When FA dosage remains unchanged, and GGBS increases from 150 g to 270 g, the 3 d compressive strength of CLSM increases from 2.01 MPa to 4.00 MPa, and the 28 d compressive strength increases from 6.83 MPa to 11.12 MPa. When GGBS dosage remains unchanged, and FA changes from 120 g to 240 g, the 3 d compressive strength increases from 2.41 MPa to 3.13 MPa, and the 28 d compressive strength increases from 6.65 MPa to 10.24 MPa. GGBS and FA increase the compactness of CLSM as more calcium silicate hydrate (C-S-H) and calcium silicaluminate hydrate (C-A-S-H) are produced.

Key words: controlled low strength material, ground granulated blast furnace slag, fly ash, compressive strength, microstructure

中图分类号:

TU502

王宁宁, 胡康飞, 包益鋆, 张文文, 卜静武, 陈徐东. 矿粉和粉煤灰掺量对可控性低强度材料(CLSM)性能的影响[J]. 硅酸盐通报, 2025, 44(5): 1726-1733.

WANG Ningning, HU Kangfei, BAO Yijun, ZHANG Wenwen, BU Jingwu, CHEN Xudong. Influences of Ground Granulated Blast Furnace Slag and Fly Ash Dosages on Performance of Controlled Low Strength Materials (CLSM)[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(5): 1726-1733.

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矿粉和粉煤灰掺量对可控性低强度材料(CLSM)性能的影响

Influences of Ground Granulated Blast Furnace Slag and Fly Ash Dosages on Performance of Controlled Low Strength Materials (CLSM)

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