NaAlO<sub>2</sub>激发石灰石粉的净浆中胶凝物相表征

doi:10.11896/cldb.23020027

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Abstract Limestone has a low reactivity in cement-based material. However, when NaAlO₂ is used as the activator, the limestone-based cementitious material with good property can be fabricated. Aiming to further analyze the cementitious phase in the NaAlO₂-activated limestone paste and clarify the formation mechanism of its property, the reaction process, product proportion, mechanical property and microstructure characteristic of D1 (activated by NaAlO₂) and D2 (activated by the mixture of NaOH and Al(OH)₃ at a 1∶1 molar ratio) were compared and analyzed in this work. The experimental results showed that both D1 and D2 contained two exothermic peaks. The first peak corresponded to the dissolution of the activator, and the second peak was related to the formation of monocarboaluminate (Mc). The crystallization process of Mc in D1 was faster than that in D2, and the second exothermic peak appeared earlier in D1 than that in D2. In D1, partial NaAlO₂ formed Mc. The other consumed part did not form crystal products. They formed the microcrystalline AH₃ phase which was between crystal and amorphous state. Transmission electron microscopy (TEM) results indicated that the microcrystalline AH₃ phase exhibited the diffraction characteristics of scattered diffraction spots on concentric rings. It had a smaller particle size than gibbsite and yielded a better cementitious characteristic. After curing 28 d, the compressive strength of D1 (22.80 MPa) was significantly higher than that of D2 (0.95 MPa), indicating that AH₃ phase was an important cementitious phase in the NaAlO₂-activated limestone paste.

Key words： limestone powder NaAlO₂ reaction process cementitious property AH₃ phase

Published: 10 July 2024 Online: 2024-08-01

CLC number:

TU526

Fund:National Natural Science Foundation of China (52108228,51925805).

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	Articles by authors
	LIU Yuantao
	DONG Biqin
	HONG Shuxian
	WANG Yanshuai
	FANG Guohao

Cite this article:

LIU Yuantao,DONG Biqin,HONG Shuxian, et al. Characterization of Cementitious Phase in NaAlO₂-Activated Limestone-based Paste[J]. Materials Reports, 2024, 38(13): 23020027-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23020027 OR http://www.mater-rep.com/EN/Y2024/V38/I13/23020027

1 Goldscheider N, Chen Z, Auler A S, et al. Hydrogeology Journal, 2020, 28(5), 1661.
2 Xu D L, Cui Y S, Li H, et al. Cement and Concrete Research, 2015, 78, 2.
3 Shen W, Liu Y, Yan B, et al. Renewable and Sustainable Energy Reviews, 2017, 75, 618.
4 Lothenbach B, Scrivener K, Hooton R D. Cement and Concrete Research, 2011, 41(12), 1244.
5 De Weerdt K, Haha M B, Le Saout G, et al. Cement and Concrete Research, 2011, 41(3), 279.
6 Zhuang W, Li S, Wang Z, et al. Composites Part B:Engineering, 2022, 243, 110160.
7 Snellings R, Machner A, Bolte G, et al. Cement and Concrete Research, 2022, 151, 106647.
8 Maier M, Sposito R, Beuntner N, et al. Cement and Concrete Research, 2022, 154, 106736.
9 Gupta S, Mohapatra B N, Bansal M. Current Research in Green and Sustainable Chemistry, 2020, 3, 100019.
10 Katayama T. Cement and Concrete Research, 2010, 40(4), 643.
11 Ortega-Zavala D E, Santana-Carrillo J L, Burciaga-Díaz O, et al. Cement and Concrete Research, 2019, 120, 267.
12 Wang D H, Shi C J, Farzadnia N, et al. Construction and Building Materials, 2018, 192, 153.
13 Liu Y T, Wang Y S, Dong B Q. Materials Reports, 2023, 37(1), 91 (in Chinese).
刘源涛, 王琰帅, 董必钦. 材料导报, 2023, 37(1), 91.
14 Wang F, Long G C, He J H, et al. ACS Sustainable Chemistry & Engineering, 2022, 10(20), 6559.
15 Liu Y T, Zhang Y Y, Dong B Q, et al. Construction and Building Materials, 2023, 368, 130446.
16 Zhang Y Y, Chang J, Zhao J Y, et al. Journal of the American Ceramic Society, 2018, 101(9), 4262.
17 Li L, Yang J, Shen X. Measurement, 2022, 199, 111290.
18 Ke X Y, Bernal S A, Provis J L. Cement and Concrete Research, 2016, 81, 24.
19 Bernal S A, San Nicolas R, Myers R J, et al. Cement and Concrete Research, 2014, 57, 33.
20 Puerta-Falla G, Balonis M, Le Saout G, et al. Journal of Materials Science, 2016, 51, 6062.
21 Lothenbach B, Pelletier-Chaignat L, Winnefeld F. Cement and Concrete Research, 2012, 42(12), 1621.
22 Gastaldi D, Paul G, Marchese L, et al. Cement and Concrete Research, 2016, 90, 162.
23 Ipavec A, Gabrovšek R, Vuk T, et al. Journal of the American Ceramic Society, 2011, 94(4), 1238.
24 Cuesta A, Ichikawa R U, Londono-Zuluaga D, et al. Cement and Concrete Research, 2017, 96, 1.
25 Zhang Y Y, Chang J, Zhao J Y. Journal of the American Ceramic Society, 2019, 102(4), 2165.
26 Simion A, Vasilescu M, Filip C, et al. Solid State Nuclear Magnetic Resonance, 2022, 117, 101773.
27 Ouffa N, Trauchessec R, Benzaazoua M, et al. Cement and Concrete Composites, 2022, 127, 104381.
28 Hu J Z, Zhang X, Jaegers N R, et al. The Journal of Physical Chemistry C, 2017, 121(49), 27555.
29 Hu C, Hou D, Li Z. Cement and Concrete Composites, 2017, 80, 10.
30 Ding W W, He Y J, Lu L N, et al. Journal of Thermal Analysis and Calorimetry, 2020, 141, 707.
31 Song F, Yu Z L, Yang F L, et al. Cement and Concrete Research, 2015, 71, 1.
32 Zhang Y Y, Zhao Q X, Gao Z M, et al. Cement and Concrete Research, 2021, 150, 106607.