Effect of Sodium Gluconate on the Basic Properties of Magnesium Silicate Potassium Phosphate Cement
YANG Yizhe1, LIN Xujian1,2,*, XU Xiaoying2, LIN Hengzhou3, CHEN Weiyu4, YE Caifa5
1 Advanced Manufacturing College of Fuzhou University, Jinjiang 362200, Fujian, China 2 College of Civil Engineering, Fuzhou University, Fuzhou 350108, China 3 Fujian Zhuzhao Construction Co., Ltd., Xiamen 361000, Fujian, China 4 Fujian Yongwang Construction Engineering Group Co., Ltd., Longyan 364000, Fujian, China 5 Fujian Tongde Construction Engineering Group Co., Ltd., Xiamen 361000, Fujian, China
Abstract: Magnesium silicon potassium phosphate cement (MSPPC) is an innovative high-performance magnesium phosphate cement, which is different from ordinary magnesium potassium phosphate cement (MKPC) using acidic potassium dihydrogen phosphate. Its necessary raw materials include basic dipotassium hydrogen phosphate, magnesium oxide and silica fume. MKPC is difficult to prepare without retarder, while MSPPC can be prepared without retarder due to its long setting time. After hardening, MSPPC has better mechanical properties than MKPC, but its working performance has not been able to meet the needs of practical engineering applications. The setting time and fluidity can be adjusted by the amount of retarder. Borax is a commonly used retarder for magnesium phosphate cement, but its potential toxicity problems forces the need to find a safe and effective alternative. This study investigated the influence of sodium gluconate (SG) content on the performance, compressive strength, hydration temperature, pH value, phase composition, porosity, and microstructure of MSPPC, and established a model for the retarding mechanism. The results demonstrated that a higher SG content led to a more pronounced retarding effect. At the SG dosage was 6%, the initial setting time was extended from 12 min to 30 min, and the cement paste fluidity improved from 84 mm to 142 mm. The proportion of pores larger than 0.1 μm was reduced, effectively improving pore size distribution. Although the type of hydration products did not change, there was an adverse effect on the 3 d compressive strength, from 64.3 MPa to 53.9 MPa, a decreased by 16.2%, while the 56 d compressive strength decreased by 6.99% and the adverse effect was reduced.
1 Chang Y, Shi C, Yang N, et al. Journal of the Chinese Silicate Society, 2013, 41(4), 492. 2 Li J, Zhang W, Cao Y. Construction and Building Materials, 2014, 58, 122. 3 Qian J, You C, Wang Q, et al. Construction and Building Materials, 2014, 68, 307. 4 Park J W, Kim K H, Ann K Y. Advances in Materials Science and Engineering, 2016, 2016, 7179403. 5 Li G, Zhang J, Zhang G. Construction and Building Materials, 2017, 136, 99. 6 You C, Qian J, Qin J, et al. Cement and Concrete Research, 2015, 78, 179. 7 Gao S, Guo X, Ban S, et al. Construction and Building Materials, 2023, 363, 129736. 8 Wagh A S, Singh D, Jeong S Y. Handbook of Mixed Management Technology, 2001, 25(6), 1. 9 Xie Y D, Lin X J, Pan X X, et al. Construction and Building Materials, 2020, 235, 117471. 10 Xu X, Lin X, Pan X, et al. Construction and Building Materials, 2020, 235, 117544. 11 Walling S A, Provis J L. Chemical Reviews, 2016, 116(7), 4170. 12 Yang Y, Fang B, Zhang G, et al. Materials, 2022, 15(3), 943. 13 Yu X, Yu C, Ran Q P, et al. Journal of the Chinese Ceramic Society, 2018, 46(2), 181 (in Chinese). 余鑫, 于诚, 冉千平, 等. 硅酸盐学报, 2018, 46(2), 181. 14 Li J, Ji Y S, Huang G D, et al. Rsc Advances, 2017, 7(74), 46852. 15 Tan H B, Wang J, Ma B G, et al. Journal of Journal of Wuhan University of Technology, 2014, 36(5), 6 (in Chinese). 谭洪波, 汪杰, 马保国, 等. 武汉理工大学学报, 2014, 36 (5), 6. 16 Qian C X, Yang J M. Journal of Materials in Civil Engineering, 2011, 23(10), 1405. 17 Qiao F, Chau C K, Li Z. Construction and Building Materials, 2010, 24(5), 695. 18 Li Y, Shi T, Chen B. Journal of Materials in Civil Engineering, 2016, 28(4), 04015170. 19 Tan H, Zhang X, Guo Y, et al. Construction and Building Materials, 2018, 165, 887. 20 Ma H, Xu B, Li Z. Cement and Concrete Research, 2014, 65, 96. 21 Ma H, Xu B, Liu J, et al. Materials & Design, 2014, 64, 497. 22 Li Y, Li Z, Pei H, et al. Construction and Building Materials, 2016, 102, 233.
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2024, Vol. 38 
