碱含量对水泥基材料开裂敏感性的影响

李洋; 张国锋; 张晖; 殷海波; 方何淇

doi:10.11988/ckyyb.20230430

PDF(1677 KB)

长江科学院院报 ›› 2024, Vol. 41 ›› Issue (9) : 153-160. DOI: 10.11988/ckyyb.20230430

水工结构与材料

碱含量对水泥基材料开裂敏感性的影响

李洋 ¹^,² ,
张国锋 ³ ,
张晖 ¹ ,
殷海波 ¹ ,
方何淇 ¹

作者信息 +

Influence of Alkali Content on the Cracking Sensitivity of Cement-based Materials

LI Yang ¹^,² ,
ZHANG Guo-feng ³ ,
ZHANG Hui ¹ ,
YIN Hai-bo ¹ ,
FANG He-qi ¹

Author information +

文章历史 +

摘要

选择低热硅酸盐水泥、中热硅酸盐水泥和普通硅酸盐水泥作为研究对象,利用外掺Na₂SO₄和K₂SO₄将其总碱含量调节至0.8%和1.2%,利用椭圆环法,并从干燥收缩性能、水化产物形貌、显微硬度及水化产物微观力学的角度,探究了碱对不同水泥基材料开裂敏感性的影响。结果表明:随着碱含量的提高,不同水泥基材料的开裂敏感性增加;低热硅酸盐水泥具有较高的抗裂能力,且适当地提高碱含量,有助于提高其抗裂性能;干燥收缩性并不能完全揭示碱对不同水泥基材料开裂敏感性的影响机制。碱对不同水泥基材料开裂敏感性的提高还与其微观特性有关,通过促使水化产物形貌发生转变,提高其显微硬度,降低水泥基材料浆体适应变形的能力;通过降低唯一具有胶凝特性的水化硅酸钙(C-S-H)簇间粘结力,降低水泥基材料浆体抵抗开裂的能力。

Abstract

The total alkali content of low-heat Portland cement, medium-heat Portland cement, and ordinary Portland cement was adjusted to 0.8% and 1.2% by adding Na₂SO₄ and K₂SO₄ respectively. The impact of alkali on the cracking sensitivity of various cement-based materials was investigated using the elliptical ring method by analyzing drying shrinkage performance, hydration product morphology, micro hardness, and micromechanics of hydration products. Results revealed that an increase in alkali content led to higher cracking sensitivity in various cement-based materials. Low-heat Portland cement exhibited strong crack resistance, and a suitable increase in alkali content could enhance its crack resistance performance. The drying shrinkage performance alone could not fully elucidate how alkali affected the cracking sensitivity of different cement-based materials. The microscopic mechanism behind alkali’s role in enhancing the cracking sensitivity of various cement-based materials included: (1) promoting the transformation of hydration product morphology and elevating micro hardness, thereby reducing the deformation adaptability of cement-based material pastes; (2) decreasing the inter-cluster bonding strength of hydrated calcium silicate (C-S-H), a component with distinct gelling properties, thereby diminishing the crack resistance of cement-based material pastes.

导出引用

李洋, 张国锋, 张晖, 等. 碱含量对水泥基材料开裂敏感性的影响[J]. 长江科学院院报. 2024, 41(9): 153-160 https://doi.org/10.11988/ckyyb.20230430

LI Yang, ZHANG Guo-feng, ZHANG Hui, et al. Influence of Alkali Content on the Cracking Sensitivity of Cement-based Materials[J]. Journal of Yangtze River Scientific Research Institute. 2024, 41(9): 153-160 https://doi.org/10.11988/ckyyb.20230430

中图分类号： TV4 (水工材料)

参考文献

列表( 原文顺序 | 文献年度倒序 | 文中引用次数倒序 ) 可视化分析

[1]	于方, 唐诗, 邓春林, 等. 温度和湿度对氧化镁膨胀剂膨胀性能的影响[J]. 硅酸盐通报, 2020, 39(10): 3221-3229. (YU Fang, TANG Shi, DENG Chun-lin, et al. Effects of Temperature and Humidity on Expansion Properties of Magnesium Oxide Expander[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(10): 3221-3229. (in Chinese)) 本文引用 [1]

[2]	王铁梦. 工程结构裂缝控制[M]. 北京: 中国建筑工业出版社, 1997. (WANG Tie-meng. Crack Control of Engineering Structure[M]. Beijing: China Architecture & Building Press, 1997. (in Chinese)) 本文引用 [1]

[3]

程福星, 张珍杰, 周月霞, 等. 水化热调控剂与氧化镁复掺对混凝土抗裂行为的影响[J]. 硅酸盐通报, 2022, 41(12): 4273-4281.

(CHENG

Fu-xing

, ZHANG

Zhen-jie

, ZHOU

Yue-xia

, et al. Effect of Hydration Heat Regulator and Magnesium Oxide Compounding on Crack Resistance Behavior of Concrete[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(12): 4273-4281. (in Chinese))

本文引用 [1]

[4]	MEHTA P K. Greening of the Concrete Industry for Sustainable Development[J]. Concrete International, 2002, 24(7): 23-28. 本文引用 [1]

[5]	LI Z. Advanced Concrete Technology[M]. New York: Wiley, 2011. 本文引用 [1]

[6]	理查德· W·伯罗斯. 混凝土的可见与不可见裂缝[M]. 廉慧珍, 覃维祖, 李文伟,译. 北京: 中国水利水电出版社, 2013. (BURROWS R W. The Visible and Invisible Cracking of Concrete[M]. Translated by LIAN Hui-zhen, QIN Wei-zu, LI Wen-wei. Beijing: China Water & Power Press, 2013. (in Chinese)) 本文引用 [2]

[7]	樊启祥, 李文伟, 李新宇. 低热硅酸盐水泥大坝混凝土施工关键技术研究[J]. 水力发电学报, 2017, 36(4): 11-17. (FAN Qi-xiang, LI Wen-wei, LI Xin-yu. Key Construction Technologies of Low Heat Portland Cement Dam Concrete[J]. Journal of Hydroelectric Engineering, 2017, 36(4): 11-17. (in Chinese)) 本文引用 [1]

[8]	WANG L, JIN M, WU Y, et al. Hydration, Shrinkage, Pore Structure and Fractal Dimension of Silica Fume Modified Low Heat Portland Cement-based Materials[J]. Construction and Building Materials, 2021, 272: 121952. 本文引用 [1]

[9]

李洋, 张晖, 蒋科, 等. K₂O/Na₂O对不同水泥基材料早期收缩及开裂的影响[J]. 长江科学院院报, 2022, 39(9): 124-130.

(LI

Yang

, ZHANG

Hui

, JIANG

, et al. Influence of K₂O/Na₂O on Early-age Shrinkage and Cracking of Different Cement-based Materials[J]. Journal of Yangtze River Scientific Research Institute, 2022, 39(9): 124-130. (in Chinese))

本文引用 [5]

[10]

李洋, 蒋科, 张振忠, 等. 不同类型盐碱对不同水泥基材料收缩性能的影响[J]. 长江科学院院报, 2022, 39(1): 139-145, 164.

(LI

Yang

, JIANG

, ZHANG

Zhen-zhong

, et al. Influence of Different Alkali Sulfates on Shrinkage Properties of Cement-based Materials with Different Mineral Compositions[J]. Journal of Yangtze River Scientific Research Institute, 2022, 39(1): 139-145, 164. (in Chinese))

本文引用 [3]

[11]	余睿, 王大勇, 钱雕, 等. 盐碱地区混凝土材料的耐久性评价及对策分析[J]. 防护工程, 2020, 42(3): 71-78. (YU Rui, WANG Da-yong, QIAN Diao, et al. Durability Evaluation and Strategy Analysis of Concrete Materials in Saline-alkali Areas[J]. Protective Engineering, 2020, 42(3): 71-78. (in Chinese)) 本文引用 [1]

[12]	余睿, 王楠, 程书凯, 等. 我国典型严酷环境下混凝土材料的耐久性评价及对策分析[J]. 防护工程, 2019, 41(5): 64-74. (YU Rui, WANG Nan, CHENG Shu-kai, et al. Durability Assessment and Strategy Analysis of the Concrete Subjected to Typical Harsh Environment of China[J]. Protective Engineering, 2019, 41(5): 64-74. (in Chinese)) 本文引用 [1]

[13]	TAN Y, YU H, MA H, et al. Study on the Micro-crack Evolution of Concrete Subjected to Stress Corrosion and Magnesium Sulfate[J]. Construction and Building Materials, 2017, 141: 453-460. 本文引用 [1]

[14]	王可良, 隋同波, 刘玲, 等. 高贝利特水泥混凝土的抗拉性能[J]. 硅酸盐学报, 2014, 42(11): 1409-1413. (WANG Ke-liang, SUI Tong-bo, LIU Ling, et al. Tensile Properties of High Belite Cement Concrete[J]. Journal of the Chinese Ceramic Society, 2014, 42(11): 1409-1413. (in Chinese)) 本文引用 [1]

[15]	王可良, 隋同波, 许尚杰, 等. 高贝利特水泥混凝土的断裂韧性[J]. 硅酸盐学报, 2012, 40(8): 1139-1142. (WANG Ke-liang, SUI Tong-bo, XU Shang-jie, et al. Fracture Toughness of High Belite Cement Concrete[J]. Journal of the Chinese Ceramic Society, 2012, 40(8): 1139-1142. (in Chinese)) 本文引用 [1]

[16]	BOSHOFF W P, COMBRINCK R. Modelling the Severity of Plastic Shrinkage Cracking in Concrete[J]. Cement and Concrete Research, 2013, 48: 34-39. 本文引用 [1]

[17]	COMBRINCK R, BOSHOFF W P. Typical Plastic Shrinkage Cracking Behaviour of Concrete[J]. Magazine of Concrete Research, 2013, 65(8): 486-493. 本文引用 [1]

[18]	SLOWIK V, HÜBNER T, SCHMIDT M, et al. Simulation of Capillary Shrinkage Cracking in Cement-like Materials[J]. Cement and Concrete Composites, 2009, 31(7): 461-469. 本文引用 [1]

[19]	BURROWS R W. The Visible and Invisible Cracking of Concrete[M]. Farmington Hills: American Concrete Institute, 2012. 本文引用 [1]

[20]	CONSTANTINER D, DIAMOND S. Alkali Release from Feldspars into Pore Solutions[J]. Cement and Concrete Research, 2003, 33(4): 549-554. 本文引用 [2]

[21]	MENDOZA O, GIRALDO C, CAMARGO S S J, et al. Structural and Nano-mechanical Properties of Calcium Silicate Hydrate (C-S-H) Formed from Alite Hydration in the Presence of Sodium and Potassium Hydroxide[J]. Cement and Concrete Research, 2015, 74: 88-94. 本文引用 [1]

[22]	曹丰泽, 阎培渝. 活性与养护温度对氧化镁膨胀剂膨胀性能的影响[J]. 硅酸盐学报, 2017, 45(8): 1088-1095. (CAO Feng-ze, YAN Pei-yu. Influence of Chemical Activity and Curing Temperature on Expansion Properties of Magnesium Oxide Expansive Agents[J]. Journal of the Chinese Ceramic Society, 2017, 45(8): 1088-1095. (in Chinese)) 本文引用 [1]

[23]	李洋. 碱对水泥基材料收缩开裂及砂岩石粉活性的影响机制[D]. 武汉: 武汉大学, 2016. (LI Yang. The Influence Mechanism of Alkali on Shrinkage Cracking of Cement-based Materials and Activity of Sandstone Powders[D]. Wuhan: Wuhan University, 2016. (in Chinese)) 本文引用 [3]

[24]	白春礼, 田芳, 罗克. 扫描力显微术[M]. 北京: 科学出版社, 2000. (BAI Chun-li. TIAN Fang, LUO Ke. Scanning Force Microscopy[M]. Beijing: Science Press, 2000. (in Chinese)) 本文引用 [1]

[25]

李洋, 蒋科, 黄明辉, 等. Na碱和K碱对低热水泥收缩性能的影响[J]. 长江科学院院报, 2020, 37(3): 125-130.

(LI

Yang

, JIANG

, HUANG

Ming-hui

, et al. Influence of Sodium Alkali and Potassium Alkali on the Shrinkage Performance of Low Heat Cement[J]. Journal of Yangtze River Scientific Research Institute, 2020, 37(3): 125-130. (in Chinese))

本文引用 [1]

[26]	陈美祝. 水泥基材料组分对早期水化及收缩开裂影响的研究[D]. 武汉: 武汉大学, 2004. (CHEN Mei-zhu. Study on Influence of Compositions on Hydration and Shrinkage Cracking in Cement-based Materials at Early Ages[D]. Wuhan: Wuhan University, 2004. (in Chinese)) 本文引用 [1]

[27]

RICHARDSON

I G

. Tobermorite/Jennite and Tobermorite/Calcium Hydroxide-based Models for the Structure of C-S-H: Applicability to Hardened Pastes of Tricalcium Silicate,Β-dicalcium Silicate, Portland Cement,and Blends of Portland Cement with Blast-furnace Slag,Metakaolin,or Silica Fume[J]. Cement and Concrete Research, 2004, 34(9): 1733-1777.

本文引用 [1]

[28]	SANAHUJA J, DORMIEUX L, CHANVILLARD G. Modelling Elasticity of a Hydrating Cement Paste[J]. Cement and Concrete Research, 2007, 37(10): 1427-1439. 本文引用 [1]

[29]	LOMBOY G R, WANG K J, SUNDARARAJAN S. Nanoscale Characterization of Cementitious Materials[J]. ACI Materials Journal, 2008, 105(2): 45-53. 本文引用 [1]

[30]	BROUWERS H J H, VANEIJK R J. Alkali Concentrations of Pore Solution in Hydrating OPC[J]. Cement and Concrete Research, 2003, 33(2): 191-196. 本文引用 [1]