Effect of α-Hemihydrate Gypsum on Comprehensive Performance of Cement Mortar Doped with Iron Tailings

HUANGFU Jing-qi; HE Qiang

doi:10.11988/ckyyb.20220322

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Journal of Changjiang River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (9) : 176-180. DOI: 10.11988/ckyyb.20220322

Hydraulic Structure and Material

Effect of α-Hemihydrate Gypsum on Comprehensive Performance of Cement Mortar Doped with Iron Tailings

HUANGFU Jing-qi¹, HE Qiang²

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Abstract

To enhance the performance of cement mortar modified with iron tailings, a specific proportion of α-hemihydrate gypsum was incorporated into the mortar to prepare test specimens. The effects of α-hemihydrate gypsum content and iron tailings content on the fluidity, drying shrinkage, mechanical properties, and durability of cement mortar were investigated. The hydration mechanism was examined through mineral composition and microscopic image analysis. The findings indicate that the addition of α-hemihydrate gypsum significantly increases the slump index and reduces drying shrinkage rate in the mortar. When the replacement ratio reaches 15%, the compressive strength, flexural strength, and durability of the mortar doped with α-hemihydrate gypsum achieve optimal conditions. The chemical activity of α-hemihydrate gypsum promotes secondary hydration, subsequently enhancing the density and various indicators of the mortar. The test results serve as a valuable reference for modifying environmentally friendly, low-carbon, and high-performance cement mortar.

Key words

cement mortar / iron tailings / α-hemihydrate gypsum / slump / strength / durability / microstructure

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HUANGFU Jing-qi, HE Qiang. Effect of α-Hemihydrate Gypsum on Comprehensive Performance of Cement Mortar Doped with Iron Tailings[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(9): 176-180 https://doi.org/10.11988/ckyyb.20220322

References

[1] 胡婷, 丁益民, 赖榕永, 等. 钢渣粉-脱硫石膏对饰面砂浆性能的影响及机理初探[J]. 新型建筑材料, 2018, 45(3): 80-83.
[2] 付光辉, 沈卫国, 邹先杰, 等. 尾矿作为微细化砂对砂浆工作性和强度的影响[J]. 武汉理工大学学报, 2013, 35(11): 29-33.
[3] 陈登, 宋旭艳, 何智海. 煅烧渣土-白云石对水泥砂浆强度和膨胀性能的影响[J]. 长江科学院院报, 2021, 38(1): 146-150.
[4] 诸利一, 吕文生, 杨鹏, 等. 超声波对全尾砂砂浆流变特性的影响[J]. 材料导报, 2020, 34(6): 6088-6094.
[5] 陈佩圆, 何士成, 王鹏举, 等. 高掺量矿渣砂浆的力学强度、耐久性及生态效率评价[J]. 长江科学院院报, 2021, 38(7): 115-119, 124.
[6] 郑少鹏, 牛开民, 田波, 等. 聚合物乳液对水泥砂浆流变性能的影响[J]. 建筑材料学报, 2017, 20(6): 962-969.
[7] 袁小亚, 曾俊杰, 高军, 等. 氧化石墨烯与石墨烯复掺对水泥砂浆性能影响研究[J]. 重庆交通大学学报(自然科学版), 2019, 38(9): 45-50.
[8] 侯云芬, 刘锦涛, 赵思儒, 等. 铁尾矿粉对水泥砂浆性能的影响及机理分析[J]. 应用基础与工程科学学报, 2019, 27(5): 1149-1157.
[9] 刘通, 于本田, 王焕, 等. 高吸附性石粉含量对水泥砂浆力学性能及微观结构的影响[J]. 公路交通科技, 2021, 38(8): 16-22.
[10] 陈霞, 高志扬, 彭子凌, 等. 钢渣细骨料安定性测试方法适应性及评价指标研究[J]. 长江科学院院报, 2021, 38(11): 142-148, 156.
[11] 朱效宏, 李青, 陈平, 等. 硫酸盐侵蚀条件下C-(A)-S-H组成-结构演化的量化分析[J]. 硅酸盐学报, 2021, 49(5): 901-909.
[12] 董一苇, 徐祖顺, 杨婷婷, 等. 化学石膏制备α-半水石膏的研究进展[J]. 材料导报, 2021, 35(增刊2): 241-247.
[13] 张锐横, 郑光亚, 魏兴, 等. 醇-无氯盐体系磷石膏制备α-半水石膏的研究[J]. 非金属矿, 2021, 44(1): 16-19.
[14] 汤云杰, 单春明, 顾华健, 等. 矿物掺合料对自流平磷酸钾镁水泥砂浆性能的影响[J]. 材料科学与工程学报, 2021, 39(4): 666-672.
[15] 张兰芳, 宋松松, 梁秋爽. 石膏掺量对碱激发矿渣水泥砂浆性能的影响[J]. 应用化工, 2020, 49(9): 2168-2172, 2177.
[16] 刘娟红, 马翼, 王祖琦, 等. 石膏种类对富水充填材料凝结硬化性能与机理的影响[J]. 工程科学学报, 2015, 37(12): 1557-1563.