纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (7): 2393-2403.

所属专题：水泥混凝土

纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究

吕阳^1,2, 范福龙¹, 吴远帅¹, 朱艳超², 张呈山³, 李相国^1,3

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.湖北大学高分子材料湖北省重点实验室,武汉 430062;
3.新疆隆泰达环保建材科技发展有限公司,五家渠 831300

收稿日期:2023-12-25 修订日期:2024-02-27 出版日期:2024-07-15 发布日期:2024-07-24
通信作者: 李相国,博士,研究员。E-mail:lxggroup@163.com
作者简介:吕阳(1987—),男,博士,研究员。主要从事高性能水泥基材料的研究。E-mail:yang.lv@whut.edu.cn
基金资助:
兵团重点科技攻关计划项目(2023AB013-03);高分子材料湖北省重点实验室2023年度开放基金项目

Internal Curing Properties of Acrylamide Type SAP Loaded with Nano Silica

LYU Yang^1,2, FAN Fulong¹, WU Yuanshuai¹, ZHU Yanchao², ZHANG Chengshan³, LI Xiangguo^1,3

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan 430062, China;
3. Xinjiang Longtaida Environmental Protection Building Materials Technology Development Co., Ltd., Wujiaqu 831300, China

Received:2023-12-25 Revised:2024-02-27 Online:2024-07-15 Published:2024-07-24

摘要/Abstract

摘要： 设计制备了纳米二氧化硅(NS)负载丙烯酰胺型高吸水树脂(SAP),探究了不同NS负载量的SAP对砂浆自收缩、干燥收缩和力学性能的影响。结果表明,丙烯酰胺型SAP能够完全消除砂浆自收缩,而随着NS负载量增加,负载型SAP对自收缩的抑制作用降低,但仍保持在80%以上。SAP及额外水的引入增加了砂浆的干燥收缩,但随着NS负载量增加,负载型SAP对缓解干燥收缩有积极作用。SAP及额外水的引入降低了砂浆的力学性能,但随着NS负载量增加,负载型SAP显著改善了砂浆的力学性能。其中,负载50%(相对于丙烯酰胺的质量分数)NS的SAP对砂浆力学性能影响最小,试样在28 d龄期的抗压强度与抗折强度仅损失5.6%与2.2%。热重(TG)以及背散射扫描电子显微镜(BSE)结果表明,随着NS负载量增加,负载型SAP内养护试样的水化程度显著提高,微观结构明显改善。

关键词: 纳米二氧化硅, 高吸水树脂, 砂浆, 自收缩, 干燥收缩, 力学性能, 水化程度, 微观结构

Abstract: In this paper, nano silica (NS) loaded acrylamide-type superabsorbent polymer (SAP) was designed and prepared, and the influence of different NS loadings of SAP on the autogenous shrinkage, drying shrinkage, and mechanical properties of mortar were investigated. The results showed that acrylamide-type SAP could completely eliminated the autogenous shrinkage of mortar, and the inhibition effect of NS-loaded SAP on autogenous shrinkage decreased with the increase of NS loading, but still remained above 80%. The introduction of SAP and additional water increased the drying shrinkage of mortar, but with the increase of NS loading, NS-loaded SAP had a positive effect on mitigating the drying shrinkage. The introduction of SAP and additional water reduced the mechanical properties of the mortar, but with the increase of NS loading, the NS-loaded SAP significantly improved the mechanical properties of mortar. In particular, SAP loaded with 50% (relative to the mass fraction of acrylamide) NS had the least effect on the mechanical properties of the mortar, with only a 5.6% and 2.2% loss in compressive and flexural strength of the specimens at 28 d. TG and BSE results showed that the degree of hydration of the cured specimens within NS-loaded SAP increased significantly with the increase of NS loading, and the microstructure was significantly improved.

Key words: nano silica, superabsorbent polymer, mortar, autogenous shrinkage, drying shrinkage, mechanical property, degree of hydration, microstructure

中图分类号:

TU525

吕阳, 范福龙, 吴远帅, 朱艳超, 张呈山, 李相国. 纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究[J]. 硅酸盐通报, 2024, 43(7): 2393-2403.

LYU Yang, FAN Fulong, WU Yuanshuai, ZHU Yanchao, ZHANG Chengshan, LI Xiangguo. Internal Curing Properties of Acrylamide Type SAP Loaded with Nano Silica[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2393-2403.

参考文献

[1] AÏTCIN P C. The durability characteristics of high performance concrete: a review[J]. Cement and Concrete Composites, 2003, 25(4/5): 409-420.
[2] SHI C J, WU Z M, XIAO J F, et al. A review on ultra high performance concrete: part I. Raw materials and mixture design[J]. Construction and Building Materials, 2015, 101: 741-751.
[3] SNOECK D, GOETHALS W, HOVIND J, et al. Internal curing of cement pastes by means of superabsorbent polymers visualized by neutron tomography[J]. Cement and Concrete Research, 2021, 147: 106528.
[4] MA X W, YUAN Q, LIU J H, et al. Effect of water absorption of SAP on the rheological properties of cement-based materials with ultra-low w/b ratio[J]. Construction and Building Materials, 2019, 195: 66-74.
[5] HASHOLT M T, JENSEN O M. Chloride migration in concrete with superabsorbent polymers[J]. Cement and Concrete Composites, 2015, 55: 290-297.
[6] ROHOLLAH R, AGNIESZKA J K, ALMEIDA F C R. Effect of superabsorbent polymers on microstructure and strength of blended cements mortars reinforced by polymeric fibre[J]. CEMENT, 2022, 9: 100041.
[7] MECHTCHERINE V, SCHRÖFL C, REICHARDT M, et al. Recommendations of RILEM TC 260-RSC for using superabsorbent polymers (SAP) for improving freeze-thaw resistance of cement-based materials[J]. Materials and Structures, 2019, 52(4): 75.
[8] YANG J B, SUN Z P, DE BELIE N, et al. Self-healing ability of cracks in alkali-activated slag systems incorporating superabsorbent polymers[J]. Cement and Concrete Research, 2023, 170: 107183.
[9] ESTEVES L P. Superabsorbent polymers: on their interaction with water and pore fluid[J]. Cement and Concrete Composites, 2011, 33(7): 717-724.
[10] KRAFCIK M J, ERK K A. Characterization of superabsorbent poly (sodium-acrylate acrylamide) hydrogels and influence of chemical structure on internally cured mortar[J]. Materials and Structures, 2016, 49(11): 4765-4778.
[11] ZHONG P H, WYRZYKOWSKI M, TOROPOVS N, et al. Internal curing with superabsorbent polymers of different chemical structures[J]. Cement and Concrete Research, 2019, 123: 105789.
[12] 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.
[13] KANG S H, HONG S G, MOON J. The effect of superabsorbent polymer on various scale of pore structure in ultra-high performance concrete[J]. Construction and Building Materials, 2018, 172: 29-40.
[14] ALMEIDA F C R, KLEMM A J. Efficiency of internal curing by superabsorbent polymers (SAP) in PC-GGBS mortars[J]. Cement and Concrete Composites, 2018, 88: 41-51.
[15] SUN B B, WU H, SONG W M, et al. Design methodology and mechanical properties of superabsorbent polymer (SAP) cement-based materials[J]. Construction and Building Materials, 2019, 204: 440-449.
[16] KONG X M, ZHANG Z L, LU Z C. Effect of pre-soaked superabsorbent polymer on shrinkage of high-strength concrete[J]. Materials and Structures, 2015, 48(9): 2741-2758.
[17] LEFEVER G, TSANGOURI E, SNOECK D, et al. Combined use of superabsorbent polymers and nanosilica for reduction of restrained shrinkage and strength compensation in cementitious mortars[J]. Construction and Building Materials, 2020, 251: 118966.
[18] KRAFCIK M J, BOSE B, ERK K A. Synthesis and characterization of polymer-silica composite hydrogel particles and influence of hydrogel composition on cement paste microstructure[J]. Advances in Civil Engineering Materials, 2018, 7(4): 590-613.
[19] BOSE B, DAVIS C R, ERK K A. Microstructural refinement of cement paste internally cured by polyacrylamide composite hydrogel particles containing silica fume and nanosilica[J]. Cement and Concrete Research, 2021, 143: 106400.
[20] JENSEN O M, HANSEN P F. Water-entrained cement-based materials[J]. Cement and Concrete Research, 2001, 31(4): 647-654.
[21] KANG S H, HONG S G, MOON J. Absorption kinetics of superabsorbent polymers (SAP) in various cement-based solutions[J]. Cement and Concrete Research, 2017, 97: 73-83.
[22] FRIEDEMANN K, STALLMACH F, KÄRGER J. NMR diffusion and relaxation studies during cement hydration: a non-destructive approach for clarification of the mechanism of internal post curing of cementitious materials[J]. Cement and Concrete Research, 2006, 36(5): 817-826.
[23] SNOECK D, PEL L, DE BELIE N. The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR[J]. Scientific Reports, 2017, 7: 9514.
[24] LIU H, SUN Z P, YANG J B, et al. A novel method for semi-quantitative analysis of hydration degree of cement by 1H low-field NMR[J]. Cement and Concrete Research, 2021, 141: 106329.
[25] NESTLE N, KÜHN A, FRIEDEMANN K, et al. Water balance and pore structure development in cementitious materials in internal curing with modified superabsorbent polymer studied by NMR[J]. Microporous and Mesoporous Materials, 2009, 125(1/2): 51-57.
[26] JIANG D B, LI X G, LV Y, et al. Autogenous shrinkage and hydration property of alkali activated slag pastes containing superabsorbent polymer[J]. Cement and Concrete Research, 2021, 149: 106581.
[27] ZHU Q, BARNEY C W, ERK K A. Effect of ionic crosslinking on the swelling and mechanical response of model superabsorbent polymer hydrogels for internally cured concrete[J]. Materials and Structures, 2015, 48(7): 2261-2276.
[28] FARZANIAN K, GHAHREMANINEZHAD A. The effect of the capillary forces on the desorption of hydrogels in contact with a porous cementitious material[J]. Materials and Structures, 2017, 50(5): 216.
[29] ASSMANN A, REINHARDT H W. Tensile creep and shrinkage of SAP modified concrete[J]. Cement and Concrete Research, 2014, 58: 179-185.
[30] ZHANG T S, YU Q J, WEI J X, et al. Study on optimization of hydration process of blended cement[J]. Journal of Thermal Analysis and Calorimetry, 2012, 107(2): 489-498.
[31] SCRIVENER K, OUZIA A, JUILLAND P, et al. Advances in understanding cement hydration mechanisms[J]. Cement and Concrete Research, 2019, 124: 105823.
[32] ZHONG P H, HU Z L, GRIFFA M, et al. Mechanisms of internal curing water release from retentive and non-retentive superabsorbent polymers in cement paste[J]. Cement and Concrete Research, 2021, 147: 106494.
[33] BENTZ D P, FERRARIS C F, JONES S Z, et al. Limestone and silica powder replacements for cement: early-age performance[J]. Cement & Concrete Composites, 2017, 78: 43-56.
[34] CHEN P, MA B G, TAN H B, et al. Utilization of Barium slag to improve chloride-binding ability of cement-based material[J]. Journal of Cleaner Production, 2021, 283: 124612.
[35] LIU M, TAN H B, HE X Y. Effects of nano-SiO₂ on early strength and microstructure of steam-cured high volume fly ash cement system[J]. Construction and Building Materials, 2019, 194: 350-359.
[36] ZHANG T, MA B G, WU S Y, et al. Mechanical properties and hydration process of steel slag-cement binder containing nano-SiO₂[J]. Construction and Building Materials, 2022, 314: 125660.

纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究

Internal Curing Properties of Acrylamide Type SAP Loaded with Nano Silica

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