不同环境溶液下高吸水树脂对水泥基材料的裂缝修复性

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (6): 2012-2021.

不同环境溶液下高吸水树脂对水泥基材料的裂缝修复性

杨世界¹, 张士萍², 牛龙龙², 张守卫¹

1.安徽建筑大学土木工程学院,合肥 230601;
2.南京工程学院建筑工程学院, 南京 211167

收稿日期:2024-01-24 修订日期:2024-03-31 出版日期:2024-06-15 发布日期:2024-06-18
通信作者: 张士萍,博士,教授。E-mail:zhangshiping1982@hotmail.com
作者简介:杨世界(1998—),男,硕士研究生。主要从事水泥材料性能的研究。E-mail:yangshijie187@stu.ahjzu.edu.cn
基金资助:
国家自然科学基金(52078247,51678292)

Crack Repairability of Cementitious Materials by Superabsorbent Polymers in Different Environmental Solutions

YANG Shijie¹, ZHANG Shiping², NIU Longlong², ZHANG Shouwei¹

1. College of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China;
2. Department of Architecture Civil Engineering, Nanjing Institute of Technology, Nanjing 211167, China

Received:2024-01-24 Revised:2024-03-31 Online:2024-06-15 Published:2024-06-18

摘要/Abstract

摘要： 混凝土开裂及修复一直是工程界关注的重点问题,高吸水树脂(SAP)具有一定的裂缝自愈合功能。本文测试了不同环境溶液(NaOH、NaCl和蒸馏水)下SAP的吸液性能,以开裂试件的抗压强度恢复率、不同裂缝宽度(0.1、0.2 mm)的自愈合率以及裂缝填充状态为修复指标,分析了不同质量分数(0%、0.5%、1.0%)的SAP在不同环境溶液下对开裂砂浆试件的修复效果。结果表明:SAP在不同环境溶液下的吸液倍率呈先快速增加后缓慢趋于稳定的变化规律,其中SAP在NaOH环境溶液下的吸液倍率最高;SAP的掺入一定程度上提升了开裂砂浆试件在不同环境溶液下的抗压强度恢复率,其中掺入0.5%SAP的试件在NaOH环境溶液修复28 d的抗压强度恢复率最高,高出基准组17%;SAP的掺入提高了不同裂缝宽度的砂浆试件在不同环境溶液下的自愈合性能,随着SAP含量增加,0.2 mm裂缝宽度的砂浆试件在NaOH环境溶液修复28 d的自愈合率显著高于蒸馏水和NaCl溶液,掺入1.0%SAP的试件在NaOH环境溶液下的自愈合率达90%;SAP协同水化产物封堵裂缝口,提高了水泥砂浆的耐久性。

关键词: 环境溶液, 高吸水树脂, 砂浆, 裂缝, 抗压强度, 自愈合

Abstract: Cracking and repair of concrete have always been the focus of attention in engineering field. Superabsorbent polymers (SAP) have a certain crack self-healing function. In this paper, the liquid absorption properties of SAP under different environmental solutions (NaOH, NaCl and distilled water) were tested. The compressive strength recovery rate of cracked specimens, the self-healing rate of different crack widths (0.1, 0.2 mm ) and the crack filling state were used as repair indicators. The repair effect of SAP with different mass fractions (0%, 0.5%, 1.0%) on cracked mortar specimens under different environmental solutions was analyzed. The results show that the liquid absorption rate of SAP in different environmental solutions increases rapidly and then tends to be stable, and the liquid absorption rate of SAP in NaOH environmental solution is the highest. The incorporation of SAP improves the compressive strength recovery rate of cracked mortar specimens under different environmental solutions to a certain extent. Among them, the compressive strength recovery rate of specimens mixed with 0.5% SAP in NaOH environmental solution for 28 d is the highest, which is 17% higher than that of reference group. The incorporation of SAP improves the self-healing properties of mortar specimens with different crack widths in different environmental solutions. With the increase of SAP content, the self-healing properties of mortar specimens with 0.2 mm crack width repaired in NaOH environmental solution for 28 d is significantly higher than that of distilled water and NaCl solution. The self-healing rate of specimens with 1.0% SAP in NaOH environmental solution is 90%. The incorporation of SAP cooperates with hydration products to seal the crack mouth, so it is beneficial to improve the durability of cement mortar.

Key words: environmental solution, superabsorbent polymer, mortar, crack, compressive strength, self-healing

中图分类号:

TU528

杨世界, 张士萍, 牛龙龙, 张守卫. 不同环境溶液下高吸水树脂对水泥基材料的裂缝修复性[J]. 硅酸盐通报, 2024, 43(6): 2012-2021.

YANG Shijie, ZHANG Shiping, NIU Longlong, ZHANG Shouwei. Crack Repairability of Cementitious Materials by Superabsorbent Polymers in Different Environmental Solutions[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(6): 2012-2021.

参考文献

[1] ZAID O, AHMAD J, SIDDIQUE M S, et al. A step towards sustainable glass fiber reinforced concrete utilizing silica fume and waste coconut shell aggregate[J]. Scientific Reports, 2021, 11: 12822.
[2] ASLAM F, ZAID O, ALTHOEY F, et al. Evaluating the influence of fly ash and waste glass on the characteristics of coconut fibers reinforced concrete[J]. Structural Concrete, 2023, 24(2): 2440-2459.
[3] 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.
[4] 贾炎歌, 罗忠涛, 杨久俊, 等. Na₂SO₄溶液对砂浆裂缝自愈合影响及机理[J]. 混凝土, 2015(11): 103-105+109.
JIA Y G, LUO Z T, YANG J J, et al. Research of effect and mechanism of mortar cracks self-healing under Na₂SO₄ solution[J]. Concrete, 2015(11): 103-105+109 (in Chinese).
[5] 申爱琴, 杨景玉, 郭寅川, 等. SAP内养生水泥混凝土综述[J]. 交通运输工程学报, 2021, 21(4): 1-31.
SHEN A Q, YANG J Y, GUO Y C, et al. Review on cement concrete internally cured by SAP[J]. Journal of Traffic and Transportation Engineering, 2021, 21(4): 1-31 (in Chinese).
[6] 刘素瑞, 杨久俊, 王战忠, 等. 碳酸钠溶液环境下混凝土自愈合性能研究[J]. 混凝土与水泥制品, 2015(6): 1-5.
LIU S R, YANG J J, WANG Z Z, et al. Properties research on self-healing capacity of concrete under sodium carbonate solution[J]. China Concrete and Cement Products, 2015(6): 1-5 (in Chinese).
[7] MIGNON A, SNOECK D, DUBRUEL P, et al. Crack mitigation in concrete: superabsorbent polymers as key to success?[J]. Materials, 2017, 10(3): 237.
[8] YAO Y, ZHU Y, YANG Y Z. Incorporation superabsorbent polymer (SAP) particles as controlling pre-existing flaws to improve the performance of engineered cementitious composites (ECC)[J]. Construction and Building Materials, 2012, 28(1): 139-145.
[9] LEE H X D, WONG H S, BUENFELD N R. Self-sealing of cracks in concrete using superabsorbent polymers[J]. Cement and Concrete Research, 2016, 79: 194-208.
[10] SNOECK D, STEUPERAERT S, TITTELBOOM K V, et al. Visualization of water penetration in cementitious materials with superabsorbent polymers by means of neutron radiography[J]. Cement & Concrete Research, 2012, 42(8): 1113-1121.
[11] 杨进, 段晓鹏, 邱金胤, 等. 高吸水树脂水凝胶用于水泥基材料裂纹自封堵的研究进展[J]. 硅酸盐学报, 2023, 51(11): 3015-3024.
YANG J, DUAN X P, QIU J Y, et al. Research progress of high water-absorbent resin hydrogel for self-sealing of cracks in cementitious materials[J]. Journal of Silicates, 2023, 51(11): 3015-3024 (in Chinese).
[12] ALTHOEY F, ZAID O, ARBILI M M, et al. Physical, strength, durability and microstructural analysis of self-healing concrete: a systematic review[J]. Case Studies in Construction Materials, 2023, 18: e01730.
[13] SCHRÖFL C, MECHTCHERINE V, GORGES M. Relation between the molecular structure and the efficiency of superabsorbent polymers (SAP) as concrete admixture to mitigate autogenous shrinkage[J]. Cement and Concrete Research, 2012, 42(6): 865-873.
[14] TUTKUN B, YAZICI H. Effect of absorption determining methods of superabsorbent polymers in cementitious environments on the fresh properties[J]. Materials Today: Proceedings, 2023, 81: 43-49.
[15] TENÓRIO FILHO J R, VERMOESEN E, MANNEKENS E, et al. Enhanced durability performance of cracked and uncracked concrete by means of smart in-house developed superabsorbent polymers with alkali-stable and-unstable crosslinkers[J]. Construction and Building Materials, 2021, 297: 123812.
[16] HEARN N. Self-sealing, autogenous healing and continued hydration: what is the difference?[J]. Materials and Structures, 1998, 31(8): 563-567.
[17] SUN N N, JI R, ZHANG F F, et al. Structural evolution in poly(acrylic-co-acrylamide) pH-responsive hydrogels by low-field NMR[J]. Materials Today Communications, 2020, 22: 100748.
[18] 王柯, 胡元元, 何锐, 等. SAP类型对水泥砂浆早期抗裂和干缩性能的影响[J]. 材料导报, 2023, 37(23): 246-253.
WANG K, HU Y Y, HE R, et al. Influence of SAP type on early-crack resistance and drying shrinkage performance of cement mortar[J]. Materials Reports, 2023, 37(23): 246-253 (in Chinese).