Preparation and properties study of ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag

SU Dagang; LU Li; LONG Zhaoyong; ZHOU Xiaojun; ZHOU Xianliang; AO Jinqing

doi:10.7513/j.issn.1004-7638.2025.04.011

Volume 46 Issue 4

Aug. 2025

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SU Dagang, LU Li, LONG Zhaoyong, ZHOU Xiaojun, ZHOU Xianliang, AO Jinqing. Preparation and properties study of ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 80-87. doi: 10.7513/j.issn.1004-7638.2025.04.011

Citation:

SU Dagang, LU Li, LONG Zhaoyong, ZHOU Xiaojun, ZHOU Xianliang, AO Jinqing. Preparation and properties study of ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 80-87. doi: 10.7513/j.issn.1004-7638.2025.04.011

Citation:

SU Dagang, LU Li, LONG Zhaoyong, ZHOU Xiaojun, ZHOU Xianliang, AO Jinqing. Preparation and properties study of ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 80-87. doi: 10.7513/j.issn.1004-7638.2025.04.011

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Preparation and properties study of ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag

doi: 10.7513/j.issn.1004-7638.2025.04.011

1.
Panzhihua Huanye Metallurgical Slag Development Co., Ltd., Panzhihua 617062, Sichuan, China
2.
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, Sichuan, China
3.
Panzhihua Gangcheng Group Co., Ltd., Engineering Technology Center, Panzhihua 617099, Sichuan, China

More Information

Received Date: 2025-03-11
Available Online: 2025-08-31
Publish Date: 2025-08-31

Abstract

Abstract

The low reactivity of high titanium blast furnace slag is one of the main factors limiting its application as a sole admixture in concrete. To address this issue, a ternary composite admixture consisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag was prepared, and its effects on the flow ratio and activity index of cement mortar were investigated. Combined with microscopic testing methods such as XRD and SEM-EDS, the influence mechanism of different admixtures on the performance of cement mortar was analyzed. The results indicate that the incorporation of silica fume and yellow phosphorus slag leads to a decrease in the flow ratio of cement mortar, with the silica fume having a greater impact than the yellow phosphorus slag. The activity index of the ternary composite admixture is significantly improved compared to when high titanium blast furnace slag is used alone as an admixture. The optimal activity indices at 7 days and 28 days of curing are achieved when the ratio of high-titanium blast furnace slag: silica fume: yellow phosphorus slag is 5:2:3, reaching 76.9% and 100.2%, respectively, which meets the requirements for the activity index of Grade II admixtures. Microscopic testing reveals that the incorporation of silica fume and yellow phosphorus slag consumes flaky Ca(OH)₂, generating more flocculent colloidal C-S(A)-H and needle-like AFt hydrates, which form an interlaced and dense network structure, thereby enhancing the strength of cement mortar.
- high-titanium blast furnace slag,
- silica fume,
- yellow phosphorus slag,
- composite admixture,
- flow ratio,
- activity index

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References(22)

References

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