Performance Research on New Subgrade Stabilized Materials Prepared by Waste Brick Powder and Sulfur-fixing Ash
ZHANG Rui1, LIU Wenhuan1,2, ZHANG Hao1, LI Hui1,2,3
1 College of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China 2 Shaanxi Ecological Cement & Concrete Engineering Technology Research Center, Xi'an 710055, China 3 Ecological Cement Engineering Research Center of Ministry of Education, Xi'an 710055, China
Abstract: In this work, waste brick powder and circulating fluidized bed solid sulfur ash are used to prepare a new roadbed stabilization material synergistically, and its mechanical, shrinkage and frost resistance properties were systematically studied. The results show that the 7 d unconfined compressive strength of the new roadbed material is better than that of the lime-fly ash reference sample, under the experimental ratios designed according to the requirements of m(brick dust): m (fly ash)=1∶2—1∶4 and m(binding material): m(mixture)=20∶80—15∶85, and the mechanical properties and durability of the roadbed stabilization material show a trend of increasing and then decreasing with the increase of brick dust dosing, but they are better than the standard specified values. When the brick dust dosing is 30% and the stable sulfur ash dosing is 70% (both are mass fractions), the mechanical, shrinkage and freeze-thaw properties of new roadbed stabilization materials were optimal. XRD SEM and TGA methods were used to analyze the mineral composition, microstructure and thermal weight loss characteristics of each scheme's new roadbed materials' hydration products, and the synergistic mechanism of multi-solid waste was studied. The results show that the hydration products generate in the new roadbed materials prepared by the synergistic sulfur ash fixation of brick powder were as follows: ettringite, calcium silicate hydrate and calcium carbonate; these hydration products provide strength for new road base stabilization materials.
1 Wang R F. Research on construction and demolition waste disposal system. Master's Thesis, Beijing Jiaotong University, China, 2020 (in Chinese). 王若飞. 建筑垃圾处置体系研究. 硕士学位论文, 北京交通大学, 2020. 2 Ye S L. Journal of Green Science and Technology, 2018(18),124 (in Chinese). 叶胜兰. 绿色科技,2018(18),124. 3 He Y Q, Wang Z, Li L J. Renewable Resources and Circular Economy, 2018,11(5),29 (in Chinese). 何永全, 王政, 李乐继.再生资源与循环经济, 2018,11(5),29. 4 Bektas F, Wang K J, Ceylan H. Construction and Building Materials, 2009, 23, 1909. 5 Turanli L, Bektas F, Monteiro P J M. Cement Concrete Research, 2003, 33(10), 1539. 6 Zhao Y S, Gao J M, Liu C, et al. Journal of Cleaner Production, 2020, 242, 118521. 7 Li L G, Lin Z H, Chen G M, et al. Journal of Cleaner Production, 2020, 274, 122787. 8 Li D X, Lyu J F, Guo Q J, et al. Journal of Engineering for Thermal Energy and Power, 2003(1), 5 (in Chinese). 李登新,吕俊复,郭庆杰,等.热能动力工程, 2003(1), 5. 9 Ji X K. Utilization and some properties of circulating fluidized bed combustion ashes. Master's Thesis, Chongqing University, China, 2007 (in Chinese). 纪宪坤. 流化床燃煤固硫灰渣几种特性与利用研究. 硕士学位论文,重庆大学,2007. 10 Ji X K, Zhou Y X, Leng F G. Coal Ash, 2009, 21(6), 41 (in Chinese). 纪宪坤,周永祥,冷发光.粉煤灰,2009, 21(6), 41. 11 Deng Q D, Wang Q Y, Li Y H, et al. Highway, 2015, 60(5), 177(in Chinese). 邓庆德,王群英,李勇辉,等. 公路,2015, 60(5),177. 12 Zhang K. Study on Road performance of solidfied muddy soil by fluidized bed combustion fly ashes. Master's Thesis, Chongqing University, China, 2012(in Chinese). 张凯. 流化床燃煤固硫灰固化淤泥土路用性能研究. 硕士学位论文,重庆大学,2012. 13 Zhang P. Research on anti-cracking performance of semi-rigid base course in high-grad highway. Ph.D. Thesis, Dalian University of Technology, China, 2007(in Chinese). 张鹏. 高等级公路半刚性基层材料的抗裂性能研究. 博士学位论文,大连理工大学,2007. 14 Huang K H. Geochimica, 1987(1), 48 (in Chinese). 黄开汉. 地球化学, 1987(1), 48.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2022, Vol. 36 
