Abstract: In order to improve the activity of waste brick, compounded it with fly ash, mineral powder and alkali-activator to form the construction waste composite powder materials (CWCPM). For further study the feasibility of CWCPM as concrete admixture, studied the pore structure of differe-nt concretes mixed with CWCPM by the method of mercury injection, analyzed the relationship between compressive strength of the concrete and pore parameters, pore size distribution, set up compressive strength-pore structure prediction model through multiple regression by considering the pore parameters and pore size distribution. Results show that CWCPM reduces 7 d compressive strength of the specimen; when its dosage is less than 30%, the 28 d compressive strength is higher than that of the control specimen; the greater total pore area and the smaller total pore volume, average pore diameter and porosity indicate higher strength value; the compressive strength shows a negative correlation with the number of capillary pore and large pore, and has no obvious relation with the number of gel pore and transition pore; the compressive strength-pore structure model which considers the pore parameters and pore size distribution can accurately predict the compressive strength of concrete mixing with CWCPM.
薛翠真, 申爱琴, 郭寅川. 基于孔结构参数的掺CWCPM混凝土抗压强度预测模型的建立[J]. 材料导报, 2019, 33(8): 1348-1353.
XUE Cuizhen, SHEN Aiqin, GUO Yinchuan. Prediction Model for the Compressive Strength of Concrete Mixed with CWCPM Based on Pore Structure Parameters. Materials Reports, 2019, 33(8): 1348-1353.
1 Zhang Y. Mechanical property of recycled coarse aggregate concrete and precasted wall slab members made with construction waste of clay brick. Ph.D. Thesis, Zhengzhou University, China, 2014(in Chinese).
2 Yi C. The study on the resource recovery of construction waste for recycled aggregate concrete. ’s Thesis, Jinan University, China, 2014(in Chinese).
3 Levy S M, Helene P. Cement & Concrete Research, 2004, 34(11),1975.
4 Kou S C, Chi S P, Etxeberria M. Cement & Concrete Composites, 2014, 53(10),73.
5 Xue C Z,Shen A Q,Guo Y C, et al. Materials Review B:Research Papers,2016,30(5),130(in Chinese).
6 Chen M Z, Lin J T, Wu S P, et al. Construction & Building Materials, 2011, 25(4),1532.
7 Xiao S Y, Zhu L. Journal of Shenyang Jianzhu University (Natural Science),2016(4),608(in Chinese).
8 Xie C, Wang Q C, Li S, et al. Bulletin of the Chinese Ceramic Society,2015,34(12),3695(in Chinese).
9 Bu J, Tian Z. Sādhanā, 2016, 41(3),1.
10 Wei J X, Yu Q J, Zeng X X, et al. Journal of South China University of Technology (Natural Science Edition),2007,35(2),121(in Chinese).
11 Ma G J,Guo X Y,Huang W X, et al. Bulletin of the Chinese Ceramic Society, 2016(7),2259(in Chinese).
12 Das B B, Kondraivendhan B. Construction & Building Materials, 2012, 28(1),382.
13 Khatib J M, Mangat P S. Cement & Concrete Composites, 1999, 21(5-6),431.
14 Xue C Z,Shen A Q,Guo Y C, et al. Journal of Jiangsu University (Nature Science Edition),2017, 38(3),343(in Chinese).
薛翠真, 申爱琴, 郭寅川,等.江苏大学学报(自然科学版), 2017, 38(3),343.
15 Bensted J. Structure and properties of cement, Chemical Industry Press, China, 2008(in Chinese).
16 Mehta P K. In :Proceedings of 8th International Congress on the Chemistry of Cement. Rio de Janeiro, 1986,pp.113.