超细矿渣粉和偏高岭土对硫铝酸盐水泥早期收缩性能的影响

摘要/Abstract

摘要： 通过开展化学收缩、自收缩与干燥收缩试验,研究了超细矿渣粉和偏高岭土对硫铝酸盐水泥早期收缩性能的影响。结果表明,掺入超细矿渣粉与偏高岭土会增大水泥浆体的内部相对湿度,能有效抑制水泥浆体的化学收缩、自收缩与干燥收缩,且掺量越大,抑制效果越明显,根据水泥浆体的内部相对湿度能够大致判断其自收缩的变化规律。掺入超细矿渣粉与偏高岭土会加快硫铝酸盐水泥的早期水化,使化学收缩变化速率达到峰值的时间提前。当超细矿渣粉的掺量为20%(质量分数,下同)或偏高岭土的掺量为10%、20%时,与空白组相比水泥浆体的7 d自收缩分别减小了42.21%、35.89%和63.73%,7 d干燥收缩分别减小了24.89%、16.42%和30.87%。在相同掺量条件下,掺入偏高岭土的水泥浆体化学收缩、自收缩与干燥收缩显著小于掺入超细矿渣粉的水泥浆体。自收缩与线性化学收缩的比值随龄期的增长而减小,掺入超细矿渣粉与偏高岭土后,自收缩与线性化学收缩的比值进一步减小。

关键词: 硫铝酸盐水泥, 超细矿渣粉, 偏高岭土, 化学收缩, 自收缩, 干燥收缩

Abstract: The influence of ultrafine ground granulated blast furnace slag (UFS) and metakaolin (MK) on the chemical shrinkage, autogenous shrinkage and drying shrinkage of calcium sulfoaluminate (CSA)cement were studied. The results indicate that the addition of UFS and MK increases the internal relative humidity of cement paste. The chemical shrinkage, autogenous shrinkage and drying shrinkage of cement paste decrease with the increase of UFS and MK. The autogenous shrinkage can be predicted roughly by the internal relative humidity of cement paste. The incorporation of UFS and MK accelerate the early hydration of cement paste. The time for chemical shrinkage to reach peak value is ahead with the addition of UFS and MK. The autogenous shrinkage and drying shrinkage of the cement paste with 20% (mass fraction, the same below) UFS or 10%, 20% MK are less than that of the control sample. Among them, the autogenous shrinkage of cement paste at 7 d decreases by 42.21%, 35.89% and 63.73%, respectively, and the drying shrinkage at 7 d decreases by 24.89%, 16.42% and 30.87%, respectively. In addition, the pastes with MK show less chemical shrinkage, autogenous shrinkage and drying shrinkage than that of the pastes with the same content of UFS. The proportion of autogenous shrinkage to linear chemical shrinkage decreases with the increase of curing time, and decreases with the incorporation of UFS and MK.

Key words: calcium sulfoaluminate cement, ultrafine ground granulated blast furnace slag, metakaolin, chemical shrinkage, autogenous shrinkage, drying shrinkage

中图分类号:

TU525

刘艳玲, 廖宜顺, 李亚刚. 超细矿渣粉和偏高岭土对硫铝酸盐水泥早期收缩性能的影响[J]. 硅酸盐通报, 2022, 41(6): 2090-2097.

LIU Yanling, LIAO Yishun, LI Yagang. Effects of Ultrafine Ground Granulated Blast Furnace Slag and Metakaolin on Early-Age Shrinkage of Calcium Sulfoaluminate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 2090-2097.

参考文献

[1] YOON H N, SEO J, KIM S, et al. Hydration of calcium sulfoaluminate cement blended with blast-furnace slag[J]. Construction and Building Materials, 2021, 268: 121214.
[2] CHAUNSALI P, MONDAL P. Physico-chemical interaction between mineral admixtures and OPC-calcium sulfoaluminate (CSA) cements and its influence on early-age expansion[J]. Cement and Concrete Research, 2016, 80: 10-20.
[3] SHEN Y, CHEN X, ZHANG W, et al. Influence of ternesite on the properties of calcium sulfoaluminate cements blended with fly ash[J]. Construction and Building Materials, 2018, 193: 221-229.
[4] 罗孙一鸣.硫铝酸盐水泥混凝土早期收缩及调控研究[D].北京:清华大学,2015.
LUO S Y M. Studies and controls on shrinkage of sulfoaluminate cement concrete[D]. Beijing: Tsinghua University, 2015 (in Chinese).
[5] LIU J P, TIAN Q, WANG Y J, et al. Evaluation method and mitigation strategies for shrinkage cracking of modern concrete[J]. Engineering, 2021, 7(3): 348-357.
[6] LIAO Y S, JIANG G X, WANG K J, et al. Effect of steel slag on the hydration and strength development of calcium sulfoaluminate cement[J]. Construction and Building Materials, 2020, 265: 120301.
[7] 马保国,韩磊,朱艳超,等.掺合料对硫铝酸盐水泥性能的影响[J].新型建筑材料,2014,41(9):19-21+50.
MA B G, HAN L, ZHU Y C, et al. Impact of mineral admixture on the performance of sulphate aluminum cement[J]. New Building Materials, 2014, 41(9): 19-21+50 (in Chinese).
[8] 刘经强,冯竟竟,李涛,等.混凝土外加剂实用技术手册[M].北京:化学工业出版社,2020:224.
LIU J Q, FENG J J, LI T, et al. Handbook of practical technology of concrete admixtures[M]. Beijing: Chemical Industry Press, 2020: 224 (in Chinese).
[9] RAHEEM A A, ABDULWAHAB R, KAREEM M A. Incorporation of metakaolin and nanosilica in blended cement mortar and concrete: a review[J]. Journal of Cleaner Production, 2021, 290: 125852.
[10] 李亚刚,廖宜顺,刘艳玲,等.超细矿渣粉和偏高岭土对硫铝酸盐水泥水化和强度的影响[J].硅酸盐通报,2021,40(5):1586-1593+1609.
LI Y G, LIAO Y S, LIU Y L, et al. Effects of ultrafine ground granulated blast furnace slag and metakaolin on hydration and strength of calcium sulfoaluminate cement[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(5): 1586-1593+1609 (in Chinese).
[11] GAO D Y, MENG Y, YANG L, et al. Effect of ground granulated blast furnace slag on the properties of calcium sulfoaluminate cement[J]. Construction and Building Materials, 2019, 227: 116665.
[12] 王广凯,刘梁友,冯恩娟,等.硫铝酸盐水泥基自流平砂浆性能的研究[J].硅酸盐通报,2016,35(6):1912-1917.
WANG G K, LIU L Y, FENG E J, et al. Properties of sulpho-aluminate cement based self-leveling mortar[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(6): 1912-1917 (in Chinese).
[13] 何凯,严绍军,赵莽,等.水灰比和偏高岭土掺量对硫铝酸盐水泥基材料性能的影响[J].长江科学院院报,2016,33(9):143-148.
HE K, YAN S J, ZHAO M, et al. Effects of water-cement ratio and metakaolin blending ratio on the performance of sulphoaluminate cement-based material[J]. Journal of Yangtze River Scientific Research Institute, 2016, 33(9): 143-148 (in Chinese).
[14] ASTM C1608—17. Standard test method for chemical shrinkage of hydraulic cement paste[S]. ASTM International, West Conshohocken, 2017.
[15] 蒋正武,孙振平,王培铭.高性能混凝土自身相对湿度变化的研究[J].硅酸盐学报,2003,31(8):770-773+779.
JIANG Z W, SUN Z P, WANG P M. Study on autogenous relative humidity change in high performance concrete[J]. Journal of the Chinese Ceramic Society, 2003, 31(8): 770-773+779 (in Chinese).
[16] 陈海明,黄凌昰,沈朋辉,等.水胶比对高强砂浆早期收缩特性的影响[J].硅酸盐通报,2018,37(4):1399-1403+1429.
CHEN H M, HUANG L X, SHEN P H, et al. Influence of water/binder ratio on initial shrinkage of high strength mortar[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(4): 1399-1403+1429 (in Chinese).
[17] 肖莲珍,李宗津,魏小胜.用电阻率法研究新拌混凝土的早期凝结和硬化[J].硅酸盐学报,2005,33(10):1271-1275.
XIAO L Z, LI Z J, WEI X S. Early setting and hardening process of young concrete using the resistivity measurement[J]. Journal of the Chinese Ceramic Society, 2005, 33(10): 1271-1275 (in Chinese).
[18] 邢亚兵,王毅,胡凯伟.超细矿渣粉对硅酸盐水泥性能和微观结构的影响[J].材料导报,2017,31(s1):402-405.
XING Y B, WANG Y, HU K W. Properties and microstructure of Portland cement added with ultrafine slag powder[J]. Materials Review, 2017, 31(s1): 402-405 (in Chinese).
[19] CHEN M X, YANG L, ZHENG Y, et al. Yield stress and thixotropy control of 3D-printed calcium sulfoaluminate cement composites with metakaolin related to structural build-up[J]. Construction and Building Materials, 2020, 252: 119090.
[20] LURA P, JENSEN O M, VAN BREUGEL K. Autogenous shrinkage in high-performance cement paste: an evaluation of basic mechanisms[J]. Cement and Concrete Research, 2003, 33(2): 223-232.
[21] 李悦,谈慕华,张雄,等.混凝土的自收缩及其研究进展[J].建筑材料学报,2000,3(3):252-257.
LI Y, TAN M H, ZHANG X, et al. Autogenous shrinkage of concrete and its research progress[J]. Journal of Building Materials, 2000, 3(3): 252-257 (in Chinese).
[22] 何智海,钱春香,钱桂枫,等.等强度下混凝土组分对内部相对湿度和自收缩的影响[J].功能材料,2011,42(2):222-225.
HE Z H, QIAN C X, QIAN G F, et al. Influence of concrete constituents on autogenous shrinkage and interior relative humidity of concrete at same compressive strengths[J]. Journal of Functional Materials, 2011, 42(2): 222-225 (in Chinese).
[23] 张广兴.轨道修补用高性能硫铝酸盐基快速修补材料研究[J].中国测试,2021,47(5):145-150+161.
ZHANG G X. Research on high performance sulfoaluminate based rapid repair material for track repair[J]. China Measurement & Test, 2021, 47(5): 145-150+161 (in Chinese).
[24] 曾昊,詹培敏,李增,等.矿物掺合料对水泥基材料干燥收缩影响的研究进展[J].硅酸盐通报,2020,39(9):2714-2723.
ZENG H, ZHAN P M, LI Z, et al. Research progress on effects of mineral admixtures on drying shrinkage of cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(9): 2714-2723 (in Chinese).
[25] 罗旌旺,卢都友,许涛,等.偏高岭土对硅酸盐水泥浆体干燥收缩行为的影响及机理[J].硅酸盐学报,2011,39(10):1687-1693.
LUO J W, LU D Y, XU T, et al. Effect of metakaolin on drying shrinkage behaviour of Portland cement pastes and its mechanism[J]. Journal of the Chinese Ceramic Society, 2011, 39(10): 1687-1693 (in Chinese).
[26] 左义兵,魏小胜.粉煤灰水泥浆体的电阻率与化学收缩及自收缩的相互关系[J].重庆大学学报,2015,38(4):45-54.
ZUO Y B, WEI X S. Relations among electrical resistivity, chemical shrinkage and autogenous shrinkage of fly ash cement pastes[J]. Journal of Chongqing University, 2015, 38(4): 45-54 (in Chinese).
[27] 刘加平,田倩.现代混凝土早期变形与收缩裂缝控制[M].北京:科学出版社,2020:79.
LIU J P, TIAN Q. Early age deformation and shrinkage crack control of modern concrete[M]. Beijing: Science Press, 2020: 79 (in Chinese).
[28] LOUKILI A, CHOPIN D, KHELIDJ A, et al. A new approach to determine autogenous shrinkage of mortar at an early age considering temperature history[J]. Cement and Concrete Research, 2000, 30(6): 915-922.