Enhancement Mechanism of Performance of Slag-Based Cementitious Materials By Infiltrated Process

doi:10.16552/j.cnki.issn1001-1625.2024.1581

Abstract

Abstract: Granulated blast furnace slag with volcanic ash charateristics can be used to produce slag-based cementitious materials after grinding. Compared with traditional cement, the hydration activity of slag-based cementitious materials is low. In order to enhance the hydration activity of grind granulated blast furnace slag (GGBS) in slag-based cementitious materials, this paper innovatively proposed to use polymerized aluminum sulfate solution to infiltrate and treat GGBS, accelerated the depolymerization of GGBS glass network structure, and improved the performance of slag-based cementitious materials. The ion dissolution behavior, surface elemental composition and microstructure morphology of GGBS-infiltrate were compared to GGBS-mix. The mechanism of infiltrated process to enhance the performance of slag-based cementitious materials was also analyzed by compressive strength, exothermic hydration, phase changes, and microscopic morphology tests. The results show that the amount of silicon ions dissolved in infiltrated filtrate is significantly higher than the amount of silicon ions dissolved in the mixed filtrate, the molar ratio of n(Ca)∶((n(Si)+n(Al)) on the surface of the GGBS-infiltrate is reduced to 0.266, and the structure of GGBS-infiltrate is corroded. The setting time of the slag-based cementitious material prepared using infiltrated GGBS is reduced to 147 min, and the compressive strength of samples reaches to 3.75 MPa at 1 d. The GGBS-infiltrated process can promote the generation of ettringite and C-A-S-H gel, accelerate the hydration process of slag-based cementitious materials, and improve the performance of slag-based cementitious materials.

Key words: polymerized aluminum sulfate, infiltrate, ground granulated blast furnace slag, slag-based cementitious material, phase analysis

CLC Number:

TU526

XIE Chen, CHEN Wei, WANG Hui, WANG Dongmin, LIU Yihui, LI Bo. Enhancement Mechanism of Performance of Slag-Based Cementitious Materials By Infiltrated Process[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1297-1305.

References

[1] WANG H M, LIU X M, ZHANG Z Q. Pozzolanic activity evaluation methods of solid waste: a review[J]. Journal of Cleaner Production, 2023, 402: 136783.
[2] XU Z, LI C P, XIAO B L, et al. Development of slag-based filling cementitious materials and their application in ultrafine tailing sand filling[J]. Construction and Building Materials, 2024, 452: 138966.
[3] SEIFU M N, JANG D, KIM G M, et al. Improving properties of Portland cement-blast furnace slag blended paste through sodium bicarbonate-induced carbonation[J]. Developments in the Built Environment, 2024, 20: 100575.
[4] ZHOU Q, ZHANG Y Y, LIU J H, et al. Research and application status and development trend of alkali-activated binder powder for mine backfill[J]. Journal of Renewable Materials, 2022, 10(12): 3185-3199.
[5] QIN X T, CAO Y H, GUAN H W, et al. Resource utilization and development of phosphogypsum-based materials in civil engineering[J]. Journal of Cleaner Production, 2023, 387: 135858.
[6] XING J R, ZHOU Y, PENG Z C, et al. The influence of different kinds of weak acid salts on the macro-performance, micro-structure, and hydration mechanism of the supersulfated cement[J]. Journal of Building Engineering, 2023, 66: 105937.
[7] GANESH P, MURTHY A R. Tensile behaviour and durability aspects of sustainable ultra-high performance concrete incorporated with GGBS as cementitious material[J]. Construction and Building Materials, 2019, 197: 667-680.
[8] MA X B, SHI D Q, XIA Y, et al. Controllable setting time of alkali-activated materials incorporating sewage sludge ash and GGBS: the role of retarders[J]. Construction and Building Materials, 2024, 412: 134857.
[9] YANG J, WANG Z Q, HE X Y, et al. Using superabsorbent polymer to mitigate the fast setting and high autogenous shrinkage of carbide slag and sodium silicate activated ultrafine GGBS based composites[J]. Sustainable Chemistry and Pharmacy, 2024, 39: 101550.
[10] 栾明昱. 水淬高炉矿渣解离行为研究[D]. 重庆: 重庆大学, 2020.
LUAN M Y. Study on dissociation behavior of ground granulated blast furnace slag[D]. Chongqing: Chongqing University, 2020 (in Chinese).
[11] 朱效宏. 高效减水剂与电气石粉协同作用对碱矿渣胶结材浆体性能影响研究[D]. 重庆: 重庆大学, 2017.
ZHU X H. Synergistic effect of superplasticizers and tourmaline powder on properties of water glass-activated slag binder paste[D]. Chongqing: Chongqing University, 2017 (in Chinese).
[12] 陈伟, 唐焱杰, 田健, 等. 聚合铝改性磷石膏基超硫矿渣胶凝材料制备与性能研究[J]. 武汉理工大学学报, 2016, 38(2): 1-6.
CHEN W, TANG Y J, TIAN J, et al. Research on preparation and performance of poly-Al enhanced phosphorus gypsum based super-sulphated cement[J]. Journal of Wuhan University of Technology, 2016, 38(2): 1-6 (in Chinese).
[13] LI B, QIN J F, LI Q, et al. Promoting the dissolution of slag in blended cement via adding polyaluminum sulfate and controlling the inner spatial zonation[J]. Construction and Building Materials, 2023, 399: 132543.
[14] 林宗寿, 黄赟, 水中和, 等. 过硫磷石膏矿渣水泥与混凝土[M]. 武汉: 武汉理工大学出版社, 2015.
LIN Z S, HUANG Y, SHUI Z H, et al. Excess-sulfate phosphogypsum slag cement and concrete[M]. Wuhan: Wuhan University of Technology Press, 2015 (in Chinese).
[15] 冯成洪, 毕哲, 伍晓红. 聚合氯化铝絮凝形态学与凝聚絮凝机理[M]. 北京: 科学出版社, 2015.
FENG C H, BI Z, WU X H. Polyaluminum chloride flocculation morphology and coagulation flocculation mechanism[M]. Beijing: Science Press, 2015 (in Chinese).
[16] LIU X, TANG P, CHEN W. Development of an ettringite-based low carbon binder by promoting the nucleation and Ostwald ripening process[J]. Construction and Building Materials, 2024, 427: 136282.