脱硫石膏的热处理对超硫酸盐水泥性能的影响

doi:10.11962/1006-4990.2019-0664

Abstract

Abstract:

The effects of 45,105,165,500 ℃ heat-treated desulfurized gypsum on the properties of super sulfated cement were studied.The basic physical properties of the prepared super sulfated cement were characterized.Results showed that ce-ment with 45 ℃ and 500 ℃ heat treated desulfurized gypsum owned longer setting time,while the setting time of cement with higher water requirement of normal consistency had been shortened by 105 ℃ and 165 ℃ heat treated desulfurized gypsum.The workability of freshly mixed rubber sand was significantly reduced with the same water-binder ratio.Cement with 500 ℃ heat treated desulfurized gypsum had better mechanical properties than 45,105,165 ℃ heat treated gypsum.Micro analysis found that the main hydration products of super sulfated cement mixed with desulfurized gypsum after heat treatment at differ-ent temperatures were hydrated calcium silicate,ettringite and gypsum.A large amount of ettringite was produced in the later hydration stage of super sulfated cement with heat treated desulfurized gypsum after 500 ℃,while the ettringite mineral phase was less in the hydration products of cement with desulfurized gypsum heat treatment at 45,105,165 ℃.The desulfurized gypsum treated at 105 ℃ and 165 ℃ was easier to absorb the mixed water,which making mechanical properties lower for reducing the homogeneity of samples.

Key words: desulfurized gypsum, super sulfated cement, hydration products, microstructure

CLC Number:

TQ132.32

Zhou Jianwei,Cheng Baojun,Yu Baoying,Ma Pengfei,He Pingxian. Effect of heat-treated desulfurized gypsum on properties of super sulfated cement[J]. Inorganic Chemicals Industry, 2020, 52(11): 79-85.

Figures/Tables 13

References 27

[1]	卢兰萍, 李阳, 王稷良, 等. 脱硫石膏综合利用的现状与分析[J].粉煤灰综合利用, 2019(3):95-98.
[2]	张凡凡, 陈超, 张西兴, 等. 不同来源石膏的性能特点与应用分析[J]. 无机盐工业, 2017,49(8):10-13.
[3]	昌松. 火电厂湿法烟气脱硫脱硫石膏脱水问题分析及改进措施[J].科学技术创新, 2019(31):44-45.
[4]	尤彩霞, 李军, 孙娜, 等. 电厂脱硫石膏制水泥缓凝剂二水石膏的研究[J]. 无机盐工业, 2019,51(12):71-74.
[5]	苏清发, 周勇敏, 陈永瑞, 等. 脱硫灰/脱硫石膏作为水泥缓凝剂的水化行为[J]. 硅酸盐学报, 2016,44(5):663-667.
[6]	莫奕新, 庞建勇, 黄金坤, 等. 粉煤灰-脱硫石膏复合水泥土渗透性试验研究[J].新型建筑材料, 2018(1):122-125.
[7]	饶益杰, 汪丽娟, 尹祥国, 等. 脱硫石膏代替天然石膏生产加气混凝土砌块的可行性及工艺研究[J].新型建筑材料, 2019(7):75-78.
[8]	李亮. 利用脱硫石膏制备发泡轻质材料的研究[J]. 无机盐工业, 2018,50(11):49-52.
[9]	闫国斌, 许立顺, 赵建文. 利用脱硫灰烧结渣制备新型充填胶凝材料的试验[J]. 矿业研究与开发, 2015,35(12):22-27.
[10]	魏微, 杨志强, 高谦. 全尾砂新型胶凝材料的胶结作用[J]. 建筑材料学报, 2013,16(5):881-887.
[11]	胡军. 脱硫石膏在水泥稳定碎石基层中的工程应用研究[J].城市道桥与防洪, 2014(4):234-237.
[12]	石婧, 黄超, 刘娟, 等. 脱硫石膏不同施用量对新疆盐碱土壤改良效果及作物产量的影响[J]. 环境工程学报, 2018,12(6):1800-1807.
[13]	阿斯古丽·阿吾提, 祁通, 刘国宏, 等.脱硫石膏改良碱化土壤施用技术规程[J].农业科技通讯, 2019(10):204-205.
[14]	刘数华, 王露, 余保英. 超硫酸盐水泥的水化机理及工程应用综述[J].混凝土世界, 2018(10):46-51.
[15]	Collier N C, Milestone N B, Gordon L E, et al. The suitability of a supersulfated cement for nuclear waste immobilisation[J]. Journal of Nuclear Materials, 2014,452(1/2/3):457-464. doi: 10.1016/j.jnucmat.2014.05.078
[16]	陆建鑫, 水中和, 田素芳, 等. 超硫酸盐水泥与波特兰水泥混凝土显微结构与性能的比较研究[J].武汉理工大学学报, 2013(5):1-7.
[17]	Juenger M C G, Winnefeld F, Provis J L, et al. Advances in alterna-tive cementitious binders[J]. Cement & Concrete Research, 2011,41(12):1232-1243.
[18]	余保英, 高育欣, 王军. 含不同石膏种类的超硫酸盐水泥的水化行为[J]. 建筑材料学报, 2014,17(6):965-971.
[19]	孙正宁, 周健, 慕儒, 等. 新型超硫酸盐水泥水化硬化机理[J]. 硅酸盐通报, 2019,38(8):2362-2368.
[20]	许长红, 王露, 刘数华. 一种超低水化热水泥——超硫酸盐水泥[J].混凝土世界, 2017(10):38-42.
[21]	方佩佩, 刘数华. 改性磷石膏基超硫酸盐水泥研究进展[J]. 硅酸盐通报, 2019,38(8):2430-2434.
[22]	欧阳嘉艺, 刘数华. 磷石膏改性机制及其在超硫酸盐水泥中的应用进展[J].混凝土世界, 2019(9):60-66.
[23]	郭玉萍, 王海波, 牛全林. 超硫酸盐水泥的组成、制备及性能[J]. 工程质量, 2016,34(11):66-68.
[24]	Collier N, Li X, Bai Y, et al. The effect of sulfate activation on the early age hydration of BFS:PC composite cement[J]. Journal of Nuclear Materials, 2015,464:128-134. doi: 10.1016/j.jnucmat.2015.04.044
[25]	Cabrera-luna K, Maldonado-bandala E, Nieves-mendoza D, et al. Supersulfated binders based on volcanic raw material:optimiza-tion,microstructure and reaction products[J]. Construction & Bu-ilding Materials, 2018,176:145-155.
[26]	Abouhussien A A, Hassan A A A.Monitoring early agestrength-gain of SCC with different supplementary cementitious materials using acoustic emission sensors[J]. Construction and Bulding Ma-terials, 2019,229:116858.
[27]	Liu Shuhua, Wang Lu, Gao Yuxin, et al. Influence of fineness on hydration kinetics of supersulfated cement[J]. Thermochimica Acta, 2015,605:37-42. doi: 10.1016/j.tca.2015.02.013

项目	比表面积 / （m²·kg^-1）	凝结时间/min		标稠用水量/%	力学性能/MPa
项目	比表面积 / （m²·kg^-1）	初凝	终凝	标稠用水量/%	3 d 抗折	3 d 抗压	7 d 抗折	7 d 抗压
水泥熟料	348	92	128	24.7	6.2	30.6	8.7	52.6

原料	w(CaO)	w(SiO₂)	w(Al₂O₃)	w(MgO)	w(K₂O)	w(SO₃)	w(Na₂O)
熟料	69.19	25.12	2.11	1.26	0.667	0.596	0.367
矿粉	40.39	35.56	11.55	7.16	0.517	—	1.04
石膏	48.75	4.66	1.27	0.876	0.173	40.2	0.375
原料	w(Fe₂O₃)	w(P₂O₅)	w(TiO₂)	w(ZnO)	w(MnO)	w(Cl)	w(其他)
熟料	0.232	0.145	0.127	0.063 6	0.06	0.052 6	0.029 8
矿粉	0.398	—	1.59	0.06	0.13	—	1.605
石膏	0.527	0.456	0.056 6	0.033	0.011 7	1.27	1.341 7

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of heat-treated desulfurized gypsum on properties of super sulfated cement

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