Effect of C-S-H Nanocrystalline Nucleus on Hydration Properties of Mineral Admixture Composite Cementitious Materials

Abstract

Abstract: A high-volume replacement of mineral admixtures to cement usually causes low early strength, inducing a long construction period. In this study, the effects of C-S-H nanocrystalline nucleus on the hydration properties of cementitious materials mixed with high-volume mineral admixtures were studied. Through thermodynamic calculation, the mechanism of reduction of nucleation barrier for adding C-S-H nanocrystalline nucleus was explained. The ions dissolution and precipitation behavior were tested. The results show that the hydration depth of mineral admixtures mixed cementitious materials is low because the dissolution of Ca²⁺ is restricted, inducing the slow hydration of C₃S. The dissolution-precipitation of silicate phases is greatly enhanced when the C-S-H nanocrystalline nucleus is added. Furthermore, the addition of C-S-H nanocrystalline nucleus promote the hydration activity of mineral admixtures mixed cementitious materials, reaching a similar hydration activity as pure cement. The results indicate that the C-S-H nanocrystalline nucleus significantly solve the insufficient hydration problem for a high-volume mineral admixtures replacement of cementitious materials.

Key words: mineral admixture, C-S-H nanocrystalline nucleus, nucleation barrier, hydration performance, ion dissolution, hydrate

CLC Number:

TU525.9

WANG Kun, LIU Fengdong, YANG Feihua, LYU Minwang, YANG Lu, WANG Fazhou. Effect of C-S-H Nanocrystalline Nucleus on Hydration Properties of Mineral Admixture Composite Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2352-2359.

References

[1] 瞿宏霖.煅烧煤矸石粉的制备及其对混凝土性能影响研究[D].阜新:辽宁工程技术大学,2015.
QU H L. Research on preparation of calcined coal gangue powder and its influence on concrete performance[D]. Fuxin: Liaoning Technical University, 2015 (in Chinese).
[2] YE G, LIU X, DE SCHUTTER G, et al. Influence of limestone powder used as filler in SCC on hydration and microstructure of cement pastes[J]. Cement and Concrete Composites, 2007, 29(2): 94-102.
[3] 何智海,詹培敏,杨一凡,等.复合胶凝材料浆体中矿物掺合料的反应程度[J].硅酸盐通报,2018,37(5):1681-1686.
HE Z H, ZHAN P M, YANG Y F, et al. Degree of reaction of mineral admixtures in composite cementitious material pastes[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(5): 1681-1686 (in Chinese).
[4] 时宇,朱金华,和德亮,等.矿物掺合料对混凝土力学性能与开裂趋势的影响[J].硅酸盐学报,2019,47(11):1605-1610.
SHI Y, ZHU J H, HE D L, et al. Effect of mineral admixture on mechanical properties and cracking tendency of concrete[J]. Journal of the Chinese Ceramic Society, 2019, 47(11): 1605-1610 (in Chinese).
[5] 刘作毅.谈水泥行业碳减排路径[J].中国建材,2021,70(7):98-99.
LIU Z Y. Talk about carbon emission reduction path in cement industry[J]. China Building Materials, 2021, 70(7): 98-99 (in Chinese).
[6] 时培飞.矿物掺合料对绿色高性能混凝土强度的影响[J].城市建设理论研究(电子版),2014(22):1422-1423.
SHI P F. Influence of mineral admixtures on strength of green high performance concrete[J]. Chengshi Jianshe Lilun Yan Jiu(E-Magazine), 2014(22): 1422-1423 (in Chinese).
[7] 刘松辉,魏丽颖,周双喜,等.高强低钙硅酸盐水泥研究进展[J].硅酸盐通报,2014,33(3):553-557.
LIU S H, WEI L Y, ZHOU S X, et al. Research development of high-strength low-calcium Portland cement[J]. Bulletin of the Chinese Ceramic Society, 2014, 33(3): 553-557 (in Chinese).
[8] HE Z M, LIU J Z, ZHU K W. Influence of mineral admixtures on the short and long-term performance of steam-cured concrete[J]. Energy Procedia, 2012, 16: 836-841.
[9] 龙广成,王新友,肖瑞敏.混凝土矿物掺合料的强度效应研究[J].硅酸盐学报,2002,30(2):139-143.
LONG G C, WANG X Y, XIAO R M. Study on the strength-effect of mineral admixtures on concrete[J]. Journal of the Chinese Ceramic Society, 2002, 30(2): 139-143 (in Chinese).
[10] RADLINSKI M, HARRIS N J, MONCARZ P D. Sustainable concrete: impacts of existing and emerging materials and technologies on the construction industry[C]//Architectural Engineering Conference (AEI) 2011. March 30-April 2, 2011, Oakland, California, USA. Reston, VA, USA: American Society of Civil Engineers, 2011: 252-262.
[11] 张倩倩,刘建忠,张丽辉,等.矿物掺合料对低水胶比浆体流变性能的影响机制研究[J].材料导报,2020,34(22):22054-22057+22086.
ZHANG Q Q, LIU J Z, ZHANG L H, et al. Effect of mineral admixtures on rheological properties of paste with low water-binder ratio and its mechanism[J]. Materials Reports, 2020, 34(22): 22054-22057+22086 (in Chinese).
[12] 严捍东.矿物掺合料早期水化活性的测试和分析[J].材料科学与工程学报,2005,23(3):388-392+456.
YAN H D. Determination and analysis on the early hydration activation of the mineral admixtures[J]. Journal of Materials Science and Engineering, 2005, 23(3): 388-392+456 (in Chinese).
[13] ZHANG Z Q, WANG Q, ZHANG M Z, et al. A new understanding of the effect of filler minerals on the precipitation of synthetic C-S-H[J]. Journal of Materials Science, 2020, 55(35): 16455-16469.
[14] HE J H, LONG G C, MA K L, et al. Influence of fly ash or slag on nucleation and growth of early hydration of cement[J]. Thermochimica Acta, 2021, 701: 178964.
[15] 石磊,马素花,李伟峰,等.C-S-H凝胶的水热合成及其性能研究[J].混凝土,2013(11):101-104+107.
SHI L, MA S H, LI W F, et al. Hydrothermal synthesis of C-S-H and its properties[J]. Concrete, 2013(11): 101-104+107 (in Chinese).
[16] JUILLAND P, KUMAR A, GALLUCCI E, et al. Effect of mixing on the early hydration of alite and OPC systems[J]. Cement and Concrete Research, 2012, 42(9): 1175-1188.
[17] MATSCHEI T, LOTHENBACH B, GLASSER F P. The role of calcium carbonate in cement hydration[J]. Cement and Concrete Research, 2007, 37(4): 551-558.
[18] 陈娇,于诚,慕儒,等.纳米水化硅酸钙的制备及对水泥水化影响的研究进展[J].硅酸盐通报,2021,40(5):1429-1440.
CHEN J, YU C, MU R, et al. Research progress on preparation of nano calcium silicate hydrate and its influence on cement hydration[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(5): 1429-1440 (in Chinese).
[19] 王政,杨英姿,李家和.水化硅酸钙晶种的制备及对水泥强度的影响[J].材料科学与工艺,2007,15(6):789-791+796.
WANG Z, YANG Y Z, LI J H. Preparation of C-S-H-phase nuclei and its effects on compressive strength of cement[J]. Materials Science and Technology, 2007, 15(6): 789-791+796 (in Chinese).