Effect of Soda Residue Internal Curing Agent on Autogenous Shrinkage and Early Crack Resistance of High-strength and High-performance Concrete and Its Mechanism Analysis
YANG Yibo1,2, YUE Xiaodong2, YAO Dingyu2, ZHANG Di2, GUO Wenying2, WANG Hengchang2
1 State Key Laboratory of Subtropical Architectures Science, South China University of Technology, Guangzhou 510641, China 2 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
Abstract: Soda residue is the waste residue released during the production of soda by an ammonia soda method. The improper treatment and disposal of soda residue have an adverse environmental impact and there is an urgent need to utilize this material to safeguard nature. After the process of dechlorinating, drying and crushing, the soda residual powder is utilized as an internal curing agent for the high-strength and high-performance concrete (HS-HPC) with the water binder ratio of 0.35 and 0.25. This work has evaluated the effect of the processed soda residue internal curing agent (SR) on the autogenous shrinkage and early crack resistance of HS-HPC. The results show that the SR is a fine powder mainly consisting of porous calcium carbonate particles with dihydrate gypsum as a part. The SR has exhibited a relatively high capacity of water absorption and release. Besides the positive effect of SR itself on the internal relative humidity, the additional water introduced by the SR can further improve the internal relative humidity of HS-HPC. Without reducing the 28 d compressive strength of HS-HPC, the results have shown that replacing 5.25% cement (by mass) with SR can reduce the 3 d autogenous deformation by about 30% and reduce the 3 d tensile stress by over 20% tested by the ring constraint method, particularly for the HS-HPC with lower water binder ratio. The SR has been examined to be a reliable internal curing agent for HS-HPC and there are three mechanisms collectively contributing to mitigating autogenous shrinkage. Firstly, the dihydrate gypsum in SR reacts with C3A to form an expansive ettringite to compensate for the autogenous shrinkage partially. Moreover, the SR partially replaces the cement and thus fundamentally reduces the autogenous shrinkage. Finally, the porous structure of SR allows the absorbed water to be released gradually, which improves the internal relative humidity of HS-HPC and thus reduces the capillary stress for the autogenous shrinkage.
杨医博, 岳晓东, 姚丁语, 张迪, 郭文瑛, 王恒昌. 碱渣内养护剂对高强高性能混凝土自收缩及早期抗裂性能的影响及机理分析[J]. 材料导报, 2022, 36(12): 20020019-6.
YANG Yibo, YUE Xiaodong, YAO Dingyu, ZHANG Di, GUO Wenying, WANG Hengchang. Effect of Soda Residue Internal Curing Agent on Autogenous Shrinkage and Early Crack Resistance of High-strength and High-performance Concrete and Its Mechanism Analysis. Materials Reports, 2022, 36(12): 20020019-6.
1 Wu L M, Farzadnia N,Caijun Shi C J, et al. Construction and Building Materials, 2017, 149, 62. 2 Huang Y J. Research on monitoring of water transportation in concrete and mechanism of shrinkage deformation. Master's Thesis, Harbin Institute of Technology, China, 2015 (in Chinese). 黄义建. 混凝土内部水分迁移过程监测与收缩变形机理研究. 硕士学位论文, 哈尔滨工业大学, 2015. 3 Jiang Z W, Sun Z P, Wang P M. Journal of Building Materials, 2003, 6(4), 345 (in Chinese) . 蒋正武, 孙振平, 王培铭. 建筑材料学报, 2003, 6(4), 345. 4 Cusson D, Hoogeveen T. Cement and Concrete Research, 2008, 38(6), 757. 5 Ma X W, Liu J H, Shi C J. Construction and Building Materials, 2019,218, 385. 6 Ghourchian S, Wyrzykowski M, Lura P, et al. Construction and Building Materials, 2013,40, 135. 7 Liu F J, Wang J L, Qian X, et al. Cement and Concrete Research, 2017, 95, 39. 8 Wyrzykowski M, Ghourchian S, Sinthupinyo S, et al. Cement and Concrete Composites, 2016,71, 1. 9 Zhang W H, Zhou X J, Qiao W H.Journal of Water Resources and Architectural Engineering, 2018, 16(3), 60 (in Chinese). 张卫红, 周晓靖, 乔文号. 水利与建筑工程学报, 2018, 16(3), 60. 10 de Sensale G R, Goncalves A F. International Journal of Concrete Structures and Materials, 2014, 8(3), 229. 11 Bentur A, Igarashi S I, Kovler K. Cement and Concrete Research, 2001,31, 1587. 12 Shen D J, Wang X D, Cheng D B, et al. Construction and Building Materials, 2016,106, 512. 13 Mechtcherine V, Gorges M, Schroefl C, et al. Materials and Structures, 2014, 47, 541. 14 Kong X M, Zhang Z L.Journal of the Chinese Ceramic Society, 2014, 42(2), 150 (in Chinese). 孔祥明, 张珍林. 硅酸盐学报, 2014, 42(2), 150. 15 Craeye B, Tielemans T, Lauwereijssens G, et al. Road Materials and Pavement Design, 2012, 14(1), 90. 16 Liu C H, Wang H, Ren Z, et al.Journal of Wuhan University of Technology (Transportation Science & Engineering), 2015, 39(6), 1190 (in Chinese). 刘成虎, 王辉, 任冶, 等. 武汉理工大学学报(交通科学与工程版), 2015, 39(6), 1190. 17 Zhong P H.Study on the autogenous shrinkage and mechanism of high strength concrete with super absorbent polymer. Master's Thesis, Chongqing University, China, 2015 (in Chinese). 钟佩华. 高吸水性树脂SAP对高强混凝土自收缩性能的影响及作用机理. 硕士学位论文, 重庆大学, 2015. 18 Yan W J.Research on performance and mechanism of mortar and concrete using soda residue as mineral admiture. Master's Thesis, South China University of Technology, China, 2015 (in Chinese). 严卫军. 碱渣用作矿物掺合料对砂浆和混凝土性能影响及其机理研究. 硕士学位论文, 华南理工大学, 2015. 19 Pu Y Q.Research of dechlorination Soda Residue used as internal curing materials on concrete performance influence and mechanism. Master's Thesis, South China University of Technology, China, 2017 (in Chinese). 普永强. 除氯碱渣用作内养护材料对混凝土性能影响及其机理研究. 硕士学位论文, 华南理工大学, 2017. 20 Zhang H Z.Research on the early shrinkage cracking performance of concrete under constraint conditions. Master's Thesis, Harbin Institute of Technology, China, 2014 (in Chinese). 张虎志. 约束条件下混凝土早期收缩开裂规律研究. 硕士学位论文, 哈尔滨工业大学, 2014.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2022, Vol. 36 
