Abstract: In order to relieve the significant shrinkage and poor crack resistance of alkali-activated slag cement, with the blast furnace slag and powdered municipal solid waste incineration slag as precursors and the potassium carbonate and sodium silicate as composite activators, alkali-activated blast furnace slag-powdered municipal solid waste incineration slag mortar (ASPm) was prepared, and the effect of potassium carbo-nate content (from 0% to 2%) on the autogenous shrinkage and basic tensile creep of ASPm was studied, and its mechanism was revealed by TG/DTG, SEM-EDS, MIP, and NMR. The results show that, with the increase of potassium carbonate content, the hydration degree decreases, the chemical shrinkage decreases, the capillary pressure decreases, the amount of C-A-S-H gel decreases, the amount of calcium carbo-nate crystal increases, the nominal crystal-gel ratio increases, the n(Al)/n(Si) decreases, the stacking of C-A-S-H gel is obvious, the recombination and rearrangement are restricted, and the autogenous shrinkage of ASPm decreases. When the content of potassium carbonate increases from 0% to 1.5%, the autogenous shrinkage decreases, the n(K)/n(Na) ratio increases, the amount of C-A-S-H gel declines. At this stage, the prolonged cracking time and the decreased interlayer friction of C-A-S-H gel play a leading role, and the basic tensile creep at the cracking time of ASPm increases. When the content of potassium carbonate increases from 1.5% to 2%, the n(K)/n(Na) ratio increases, and the crac-king time remains unchanged. At this stage, the reduction of autogenous shrinkage plays a dominant role, and the basic tensile creep at the cracking time of ASPm decreases. When the potassium carbonate content is 1.5%, ASPm has better mechanical properties, smaller autogenous shrinkage, the best crack resistance, and maximum basic tensile creep.
1 Chu H, Wang Q, Zhang W. Construction and Building Materials, 2024, 426, 136152. 2 Bawab J, Khatib J, Kenai S, et al. Buildings, 2021, 11(5), 179. 3 Chen B, Perumal P, Illikainen M, et al. Journal of Building Engineering, 2023, 71, 106386. 4 Chen B, Perumal P, Aghabeyk F, et al. Resources, Conservation and Recycling, 2024, 204, 107516. 5 Chen Z, Liu Y, Zhu W, et al. Construction and Building Materials, 2016, 112, 1025. 6 Zhu W, Chen X, Zhao A, et al. Journal of Cleaner Production, 2019, 212, 261. 7 Maldonado-Alameda À, Giro-Paloma J, Alfocea-Roig A, et al. Applied Sciences, 2020, 10(12), 4129. 8 Li Y, Yan X, Wan M, et al. Case Studies in Construction Materials, 2025, 22, e04423. 9 Dai X, Ren Q, Aydin S, et al. Cement and Concrete Composites, 2023, 141, 105118. 10 Zhao X W, Zhang J M, Chen X D, et al. Materials Reports, 2022, 36(16), 187 (in Chinese). 赵晓雯, 张检梅, 陈徐东, 等. 材料导报, 2022, 36(16), 187. 11 Komljenović M, Baščarević Z, Marjanović N, et al. Construction and Building Materials, 2013, 49, 31. 12 Li Z, Chen Y, Provis J L, et al. Cement and Concrete Research, 2023, 172, 107244. 13 Neto A A M, Cincotto M A, Repette W. Cement and Concrete Research, 2008, 38(4), 565. 14 Yang C, Liu J, Liu L, et al. Construction and Building Materials, 2024, 446, 138018. 15 Gu Y M, Fang Y H. Journal of the Chinese Ceramic Society, 2012, 40(1), 76 (in Chinese). 顾亚敏, 方永浩. 硅酸盐学报, 2012, 40(1), 76. 16 Ma Y, Zhang B, Lin Y, et al. Construction and Building Materials, 2022, 351, 128778. 17 Gaisinskaya-Kipnis A, Ma L, Kampf N, et al. Langmuir, 2016, 32(19), 4755. 18 Jin F, Al-Tabbaa A. Construction and Building Materials, 2015, 81, 58. 19 Li G, Tan H, Zhang J, et al. Construction and Building Materials, 2021, 291, 123378. 20 Wang S D, Scrivener K L. Cement and Concrete Research, 1995, 25(3), 561. 21 Frías M, Martínez-Ramírez S, Villa R, et al. Cement and Concrete Research, 2022, 152, 106657. 22 Wang J, Lyu X J, Wang L, et al. Journal of Cleaner Production, 2018, 171, 622. 23 Chen L J, Dou L Y. New Building Materials, 2013, 40(10), 22 (in Chinese). 陈立军, 窦立岩. 新型建筑材料, 2013, 40(10), 22. 24 Yao X, Zhang Z, Zhu H, et al. Thermochimica Acta, 2009, 493(1-2), 49. 25 Yang J H, Lin T Q, Zhang J M, et al. Journal of Harbin Institute of Technology, 2024, 56(2), 86 (in Chinese). 杨锦湖, 林添琦, 张检梅, 等. 哈尔滨工业大学学报, 2024, 56(2), 86. 26 Zhang Z, Zhang J, Yang X, et al. Journal of Building Engineering, 2023, 68, 105903. 27 Yang J, Zheng X, Ma Y, et al. Cement and Concrete Composites, 2023, 140, 105110. 28 Neto A, Cincotto M A, Repette W. Cement and Concrete Composites, 2010, 32(4), 312. 29 Yuan B, Yu Q L, Dainese E, et al. Construction and Building Materials, 2017, 153, 459. 30 Tan H, Deng X, He X, et al. Cement and Concrete Composites, 2019, 97, 387. 31 Myers R J, Bernal S A, Gehman J D, et al. Journal of the American Ceramic Society, 2015, 98(3), 996. 32 Fang G. Cement and Concrete Research, 2020, 135(1), 106141. 33 Lura P, Jensen O M, Breugel K V. Cement and Concrete Research, 2003, 33(2), 223. 34 Ma Y, Ye G. Cement and Concrete Research, 2015, 68, 75. 35 Ye H, Radlińska A. Cement and Concrete Research, 2016, 88, 126.
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2026, Vol. 40 
