Study on Composition Design and Curing Mechanism of Curing Agent Based on Characteristics of Aeolian Sand
CHEN Xiao1,2,*, LU Yalei2, WANG Jiliang3, DU Xinyu2
1 State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology, Wuhan 430070, China 2 School of Materials Science and Engineering, Wuhan University of Technology,Wuhan 430070, China 3 Key Laboratory of Road Structure ＆ Materials of Communications, Research Institute of Highway of Ministry of Communicationgs, Beijing 100088, China
Abstract: The particles of aeolian sand are round, uniform and small, smooth surface, difficult to compact and it's weak cementation with curing agent, so it is difficult to cure and it's serious shrinkage. By studying the effects of slag size and admixing quantity of slag, modulus and alkali equivalent of alkali activator and SO3 admixing quantity of curing agent on the strength and shrinkage of solidified aeolian sand, a special curing agent suitable for aeolian sand was developed, and its action mechanism was revealed by means of XRD, SEM, NMR and MIP. The results show that the strength of solidified aeolian sand can be significantly improved by adding ground slag, introducing alkali excitation system and increasing the admixing quantity of SO3, and its drying shrinkage can be reduced. Compared with ordinary P.O42.5 water mud, the 28 d unconfined compressive strength can be increased by 73.8%, while the 28 d drying shrinkage strain decreased by 40.8%. The micro test results show that the curing mechanism of the special curing agent for aeolian sand is that the pores between aeolian sand are filled with ground slag powder to improve the pore structure of solidified aeolian sand and that the cement alkali excitation system is adopted to enhance the cementitious performance of curing agent and improves the interface between the curing agent and aeolian sand and that SO3 is introduced to promote the formation of AFt crystal and fills the internal pores of solidified aeolian sand to compensate for shrinkage.
陈潇, 卢亚磊, 王稷良, 杜新宇. 基于风积沙特性的固化剂组成设计及其固化机理研究[J]. 材料导报, 2022, 36(16): 21110087-8.
CHEN Xiao, LU Yalei, WANG Jiliang, DU Xinyu. Study on Composition Design and Curing Mechanism of Curing Agent Based on Characteristics of Aeolian Sand. Materials Reports, 2022, 36(16): 21110087-8.
1 Zhang C. Heavy mineral assemblages and provenance analysis of eolian sand in the Alashan Desert, Northwestern China.Master's Thesis, Lanzhou University, China, 2020(in Chinese). 张诚. 阿拉善沙漠风积砂重矿物组成及物源分析. 硕士学位论文, 兰州大学, 2020. 2 Xia H, Zhang J T, Cai J, et al. Advances in Materials Science and Engineering, 2020, 2020,1. 3 Zhang F Y. Research and analysis of uplift capacity on cementation aeo-lian sand foundation.Master's Thesis, Hefei University of Technology, China, 2020(in Chinese). 张飞阳. 水泥固化风积沙地基抗拔性能研究与分析. 硕士学位论文, 合肥工业大学, 2020. 4 Li D, Tian K L, Zhang H L, et al. Construction and Building Materials, 2018, 172, 251. 5 Maleki M, Ebrahimi S, Asadzadeh F, et al. International Journal of Environmental Science and Technology, 2016, 13(3), 1. 6 Lai J H, Zhang K, Wang W S, et al. Journal of Desert Research, 2017,37 (4), 644(in Chinese). 赖俊华,张凯,王维树,等. 中国沙漠, 2017, 37(4), 644. 7 Li J, Wang F C, Yi F, et al. Materials, 2019,12(17),2081. 8 Liu J F, Su Y H. Journal of Highway and Transportation Research and Development (English Edition), 2017, 11(2), 32. 9 Ran W P, Zhao J,Huang W Y, et al. Journal of Dalian University of Technology, 2018, 58 (2), 141(in Chinese). 冉武平, 赵杰, 黄文薏,等. 大连理工大学学报, 2018, 58(2), 141. 10 Wu M, Xie S H, Ge G W. Bulletin of the Chinese Ceramic Society, 2021, 40 (8), 2640(in Chinese). 吴旻,谢胜华,葛根旺. 硅酸盐通报, 2021, 40(8), 2640. 11 Zhang Y, Li W S, Li J. Subgrade Engineering, 2010(1), 32(in Chinese). 张雁, 李维生, 李娟. 路基工程, 2010(1), 32. 12 Zhao Q Y. Jianshe Gongcheng Lilun Yu Shijian,2005(00),206(in Chinese). 赵其永. 建设工程理论与实践, 2005(00), 206. 13 Krizan D, Zivanovic B. Cement and Concrete Research, 2002, 32(8),1181. 14 Bakharev T, Sanjayan J G, Cheng Y B. Cement and Concrete Research, 2000, 30, 1367. 15 Chen X, Zhu G R, Zhou M K, et al. Construction and Building Mate-rials, 2018, 167,216. 16 Merzouki T, Bouasker M, Khalifa N, et al. Construction and Building Materials, 2013, 44(44), 368. 17 Aparicio N D, Cocks C F. Acta Metall Mater, 1995, 43(10), 3873. 18 Huang W Q, Lu Y. Chinese Journal of Geotechnical Engineering, 2006 (12), 2139(in Chinese). 黄晚清, 陆阳. 岩土工程学报, 2006(12), 2139. 19 Chen X, Peng J, Zhou M K. Concrete, 2008(2), 84(in Chinese). 陈潇, 彭劲, 周明凯. 混凝土, 2008(2), 84. 20 Wang F, Zhang Y J, Song Q, et al. Non-Metallic Mines, 2008 (3), 9(in Chinese). 王峰,张耀君,宋强,等. 非金属矿, 2008(3), 9. 21 Soutsos M, Boyle A P, Vinai R, et al. Construction and Building Mate-rials, 2016, 110, 355. 22 Sukmak P, Horpibulsuk S, Shen S. Construction and Building Materials, 2013, 40, 566. 23 Chen X, Zhou M K, Shen W G. Journal of Building Materials, 2009,12 (4), 418(in Chinese). 陈潇, 周明凯, 沈卫国. 建筑材料学报, 2009,12(4),418. 24 Chen Q H, Jiang Z W. Journal of Building Materials, 2020,23(1), 200(in Chinese). 陈迁好, 蒋正武. 建筑材料学报, 2020, 23(1), 200. 25 Chen P Y, Wang J L, Wang L, et al. Cement and Concrete Composites, 2019, 104, 103351. 26 Mikhailova O, Campo A D, Rovnanik P, et al. Cement and Concrete Composites, 2019, 99, 32. 27 Ma B, Li H, Li X, et al. Construction and Building Materials, 2016, 122, 242. 28 Barnes J R, Clague A D H, Clayden N J, et al. Journal of Materials Science Letters, 2004, 4(10), 1293. 29 Andersen M D, Jakobsen H J, Skibsted J. Cement and Concrete Research, 2004, 34(5), 857. 30 Wang Q, Kang S R, Wu L M, et al. Journal of Building Materials, 2020, 23 (1), 184(in Chinese). 王晴, 康升荣, 吴丽梅,等. 建筑材料学报, 2020, 23(1), 184. 31 Kumar R, Bhattacharjee B. Cement and Concrete Research, 2003, 33(1), 155.
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2022, Vol. 36 
