不同温度下矿物掺合料对喷射混凝土水化行为及力学性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (2): 407-417.

所属专题：水泥混凝土

不同温度下矿物掺合料对喷射混凝土水化行为及力学性能的影响

原健¹, 王琴¹, 曾凡超¹, 郭志翔¹, 王宏维²

1.北京建筑大学土木与交通工程学院,建筑结构与环境修复功能材料北京市重点实验室,北京 100044;
2.山西佳维新材料股份有限公司,运城 044200

收稿日期:2023-09-21 修订日期:2023-10-15 出版日期:2024-02-15 发布日期:2024-02-05
通信作者: 王琴,博士,教授。E-mail:wangqin@bucea.edu.cn
作者简介:原健(1998—),男,硕士研究生。主要从事水泥基胶凝材料、无碱速凝剂的研究。E-mail:yuanjian811@163.com
基金资助:
国家自然科学基金(52278237);运城市科技局揭榜挂帅项目;北京市学者基金(067)

Effect of Mineral Admixture on Hydration Behavior and Mechanical Properties of Shotcrete at Different Temperatures

YUAN Jian¹, WANG Qin¹, ZENG Fanchao¹, GUO Zhixiang¹, WANG Hongwei²

1. Key Laboratory of Functional Materials for Building Structure and Environment Remediation, School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Shanxi Jiawei New Material Co., Ltd., Yuncheng 044200, China

Received:2023-09-21 Revised:2023-10-15 Online:2024-02-15 Published:2024-02-05

摘要/Abstract

摘要： 不同温度下粉煤灰、矿粉和硅灰对喷射混凝土水化行为及力学性能的影响规律尚不明确。本文通过XRD定量分析、热重分析和SEM测试等手段表征了不同温度和龄期下三种矿物掺合料对喷射混凝土水化行为的影响,并测试了砂浆抗压强度。结果表明,不同温度下,硅灰和矿粉能提高喷射混凝土早期和后期强度,粉煤灰不利于早期强度的发展,20 ℃时粉煤灰体系砂浆6 h抗压强度低于基准值。6 h和1 d龄期时,温度对试块抗压强度的影响非常显著,60 ℃时硅灰体系砂浆6 h抗压强度高达13.39 MPa;随着龄期增长,温度对试块强度的增强作用减弱。温度升高会激发矿物掺合料的火山灰效应,生成C-S-H凝胶填充内部孔隙,提高体系砂浆试块抗压强度。同一温度、龄期下,硅灰体系水化产物中C-S-H凝胶含量多,抗压强度最高。矿粉体系水化程度最高,抗压强度较高。粉煤灰体系中AFt含量最高,但C-S-H凝胶含量少,抗压强度最低。本文对特殊环境下矿物掺合料在喷射混凝土中的应用有指导作用。

关键词: 喷射混凝土, 矿物掺合料, 无碱速凝剂, 温度, 水化

Abstract: The effects of fly ash, slag and silica fume on hydration behavior and mechanical properties of shotcrete at different temperatures are still unclear. The effects of three mineral admixtures on the hydration behavior of shotcrete at different temperatures and ages were characterized by XRD quantitative analysis, thermogravimetric analysis and SEM test, and the compressive strength of mortar was tested. The results show that silica fume and slag can improve the early and late strength of shotcrete at different temperatures, while fly ash is not conducive to the development of early strength. The 6 h compressive strength of fly ash mortar is lower than reference value at 20 ℃. At 6 h and 1 d ages, the effect of temperature on the compressive strength of test blocks is very significant, and the 6 h compressive strength of silica mortar at 60 ℃ is as high as 13.39 MPa. With the increase of age, the strengthening effect of temperature on the strength of test block decreases. The increase of temperature stimulates the pozzolana effect of mineral admixture, generates C-S-H gel to fill the internal pores and improve the compressive strength of mortar test block. At the same temperature and age, the content of C-S-H gel in hydration products of silica fume system is high, resulting in the highest compressive strength.The slag system has the highest degree of hydration, resulting in higher compressive strength. Although AFt content of fly ash system is the highest, C-S-H gel content is low, resulting in the lowest compressive strength.This paper provides guidance for the application of mineral admixtures in shotcrete under special environment.

Key words: shotcrete, mineral admixture, alkali-free accelerator, temperature, hydration

中图分类号:

TU528.53

原健, 王琴, 曾凡超, 郭志翔, 王宏维. 不同温度下矿物掺合料对喷射混凝土水化行为及力学性能的影响[J]. 硅酸盐通报, 2024, 43(2): 407-417.

YUAN Jian, WANG Qin, ZENG Fanchao, GUO Zhixiang, WANG Hongwei. Effect of Mineral Admixture on Hydration Behavior and Mechanical Properties of Shotcrete at Different Temperatures[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 407-417.

参考文献

[1] MALMGREN L, NORDLUND E. Interaction of shotcrete with rock and rock bolts: a numerical study[J]. International Journal of Rock Mechanics and Mining Sciences, 2008, 45(4): 538-553.
[2] PRUDÊNCIO L R. Accelerating admixtures for shotcrete[J]. Cement and Concrete Composites, 1998, 20(2/3): 213-219.
[3] ZHOU G, CHENG W M, CAO S. Development of a new type of alkali-free liquid accelerator for wet shotcrete in coal mine and its engineering application[J]. Advances in Materials Science and Engineering, 2015, 2015: 1-14.
[4] PARK H G, SUNG S K, PARK C G, et al. Influence of a C₁₂A₇ mineral-based accelerator on the strength and durability of shotcrete[J]. Cement and Concrete Research, 2008, 38(3): 379-385.
[5] MARTINEZ-RAMIREZ S, PALOMO A. Microstructure studies on Portland cement pastes obtained in highly alkaline environments[J]. Cement and Concrete Research, 2001, 31(11): 1581-1585.
[6] PAGLIA C, WOMBACHER F, BÖHNI H. The influence of alkali-free and alkaline shotcrete accelerators within cement systems[J]. Cement and Concrete Research, 2001, 31(6): 913-918.
[7] NIU M D, LI G X, ZHANG J B, et al. Preparation of alkali-free liquid accelerator based on aluminum sulfate and its accelerating mechanism on the hydration of cement pastes[J]. Construction and Building Materials, 2020, 253: 119246.
[8] SALVADOR R P, CAVALARO S H P, MONTE R, et al. Relation between chemical processes and mechanical properties of sprayed cementitious matrices containing accelerators[J]. Cement and Concrete Composites, 2017, 79: 117-132.
[9] QIU Y, DING B, GAN J Z, et al. Mechanism and preparation of liquid alkali-free liquid setting accelerator for shotcrete[J]. IOP Conference Series: Materials Science and Engineering, 2017, 182: 012034.
[10] WANG Y F, SHI C J, LEI L, et al. Formulation of an alkali-free accelerator and its effects on hydration and mechanical properties of Portland cement[J]. Cement and Concrete Composites, 2022, 129: 104485.
[11] YANG R H, HE T S, GUAN M Q, et al. Preparation and accelerating mechanism of aluminum sulfate-based alkali-free accelerating additive for sprayed concrete[J]. Construction and Building Materials, 2020, 234: 117334.
[12] LI G X, ZHANG J B, NIU M D, et al. The mechanism of alkali-free liquid accelerator on the hydration of cement pastes[J]. Construction and Building Materials, 2020, 233: 117296.
[13] YANG R H, HE T S. Influence of liquid accelerators combined with mineral admixtures on early hydration of cement pastes[J]. Construction and Building Materials, 2021, 295: 123659.
[14] 陈超, 孙振平. 硅灰对掺有无碱速凝剂水泥浆体性能的影响[J]. 材料导报, 2019, 33(14): 2348-2353.
CHEN C, SUN Z P. Effect of silica fume on the properties of cement paste with alkali-free accelerator[J]. Materials Reports, 2019, 33(14): 2348-2353 (in Chinese).
[15] 李松涛, 王子明, 苏美娟, 等. 速凝剂与掺合料的相容性规律及评价方法[J]. 混凝土世界, 2023(5): 30-38.
LI S T, WANG Z M, SU M J, et al. Compatibility and evaluation methods of accelerators and mineral admixtures[J]. China Concrete, 2023(5): 30-38 (in Chinese).
[16] LOTHENBACH B, WINNEFELD F, ALDER C, et al. Effect of temperature on the pore solution, microstructure and hydration products of Portland cement pastes[J]. Cement and Concrete Research, 2007, 37(4): 483-491.
[17] ZENG X H, MA C, LONG G C, et al. Hydration kinetics of cement composites with different admixtures at low temperatures[J]. Construction and Building Materials, 2019, 225: 223-233.
[18] RONG Z D, SUN W, XIAO H J, et al. Effect of silica fume and fly ash on hydration and microstructure evolution of cement based composites at low water-binder ratios[J]. Construction and Building Materials, 2014, 51: 446-450.
[19] SHI C J, WU Z M, XIAO J F, et al. A review on ultra high performance concrete: part I. Raw materials and mixture design[J]. Construction and Building Materials, 2015, 101: 741-751.
[20] OGAWA Y, UJI K, UENO A. Evaluation of fly ash as cementitious material for strength[J]. Cement Science and Concrete Technology, 2010, 64(1): 131-138.
[21] FU Y, XIE P, GU P, et al. Effect of temperature on sulphate adsorption/desorption by tricalcium silicate hydrates[J]. Cement and Concrete Research, 1994, 24(8): 1428-1432.

不同温度下矿物掺合料对喷射混凝土水化行为及力学性能的影响

Effect of Mineral Admixture on Hydration Behavior and Mechanical Properties of Shotcrete at Different Temperatures

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	向杰, 王胜, 李玉杰, 王文杰. 基于响应面法的地热钻采碳纳米管复合水泥基材料的研究[J]. 硅酸盐通报, 2024, 43(2): 495-508.
[2]	朱崟源, 朱干宇, 齐放, 李会泉, 陈艳, 李少鹏, 郭彦霞. 固废基水化硅酸钙制备及综合利用研究进展[J]. 硅酸盐通报, 2024, 43(2): 517-533.
[3]	李靖威, 李敬超, 郑睿鹏, 王晨. 无机玻璃结构弛豫及影响因素综述[J]. 硅酸盐通报, 2024, 43(2): 682-694.
[4]	孙勇, 赵劲凯, 黄永刚, 王威, 王彩丽, 孔壮, 宋普光, 孟凡禹. 熔压温度对光纤面板抗弯强度的影响[J]. 硅酸盐通报, 2024, 43(2): 695-701.
[5]	林淑瑾, 罗盛洋, 熊晓立. 负载S-g-C₃N₄/MgAl-CLDH光催化砂浆的去污及水化性能研究[J]. 硅酸盐通报, 2024, 43(1): 44-51.
[6]	董建统, 刘志勇, 胡忠帅, 朱丹丹, 丁怡, 张伟强, 来福琨. 减水保坍型聚羧酸减水剂的合成及性能研究[J]. 硅酸盐通报, 2024, 43(1): 52-60.
[7]	杜爽, 王伟, 乔敏, 曾鲁平, 赵爽, 陈俊松, 吴庆勇, 朱伯淞. 低温环境下液体速凝剂的适应性及强度增强机理研究[J]. 硅酸盐通报, 2024, 43(1): 61-70.
[8]	李永清, 倪勇军, 李芳芳, 郭伟龙, 曹轩豪, 关博文. 尾泥微粉-粉煤灰-水泥复合胶凝体系性能研究[J]. 硅酸盐通报, 2024, 43(1): 236-245.
[9]	郭政, 穆松, 庄智杰, 张浩, 张蕾. 中/高度真空环境下水泥基材料性能的研究进展[J]. 硅酸盐通报, 2023, 42(9): 3075-3082.
[10]	邓永刚, 代婷婷, 孙晨, 杨元全. 沸石微粉对磷酸钾镁水泥水化性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3083-3088.
[11]	沈鑫, 王敏, 黄文, 张坤悦, 郭随华, 文寨军. 低热硅酸盐水泥高温强度特性及其机理研究[J]. 硅酸盐通报, 2023, 42(9): 3100-3108.
[12]	林正祥, 唐晓丹, 于常胜, 白治朋, 职芳芳, 靳卫准, 王良, 蒋林华. 湿度和温度对MXene水泥基复合材料导电性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3117-3124.
[13]	陈友治, 吴修齐, 殷伟淞, 李万民, 汤世昌. 电石渣对复合胶凝材料力学性能和微观结构的影响[J]. 硅酸盐通报, 2023, 42(9): 3196-3203.
[14]	李学亮, 赵庆朝, 李伟光, 李勇, 朱阳戈, 宋厚彬, 杨浩, 张艳平. 煤系偏高岭土对混凝土力学性能及微观结构的影响机理[J]. 硅酸盐通报, 2023, 42(9): 3221-3230.
[15]	郭志翔, 王琴, 张秋臣, 郑海宇, 刘克俊. 氟化物对石膏基胶凝材料结构和性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3248-3257.