EVA对硫铝酸盐水泥净浆微观结构和力学性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (8): 2628-2636.

EVA对硫铝酸盐水泥净浆微观结构和力学性能的影响

何香香¹, 梅军鹏^1,2, 姜天华^1,2, 李海南³, 徐智东¹, 王智鑫¹, 周兰兰¹, 周至阳¹

1.武汉科技大学城市建设学院,武汉 430065;
2.武汉科技大学高性能工程结构研究院,武汉 430065;
3.武汉纺织大学工程造价系,武汉 430200

收稿日期:2022-04-06 修回日期:2022-05-16 出版日期:2022-08-15 发布日期:2022-08-30
通讯作者: 梅军鹏,博士,副教授。E-mail:meijunpeng2006@126.com
作者简介:何香香(1996—),女,硕士研究生。主要从事高性能土木工程材料的研究。E-mail:2232076944@qq.com
基金资助:
国家自然科学基金(51908434);湖北省教育厅科学技术研究计划项目(Q20191706)

Effect of EVA on Microstructure and Mechanical Properties of Calcium Sulfoaluminate Cement Paste

HE Xiangxiang¹, MEI Junpeng^1,2, JIANG Tianhua^1,2, LI Hainan³, XU Zhidong¹, WANG Zhixin¹, ZHOU Lanlan¹, ZHOU Zhiyang¹

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China;
3. Department of Construction Cost, Wuhan Textile University, Wuhan 430200, China

Received:2022-04-06 Revised:2022-05-16 Online:2022-08-15 Published:2022-08-30

摘要/Abstract

摘要： 研究了乙烯-醋酸乙烯酯(EVA)对硫铝酸盐水泥(CSA)净浆抗压强度、凝结时间、干燥收缩、质量损失及浆体内部温度的影响规律,并通过XRD、FTIR、SEM及EDS等测试手段对6 h、28 d龄期时的水化产物及微观结构进行分析。结果表明:掺入EVA后CSA净浆的凝结时间显著缩短,6 h的抗压强度升高,而1 d、3 d、28 d的抗压强度降低;CSA净浆的干燥收缩和质量损失率随着EVA掺量的增加逐渐减小;EVA的掺入提高了CSA净浆内部温度曲线的峰值,加快了峰值出现的时间。微观分析表明:EVA对CSA净浆6 h的水化具有促进作用,使其生成了更多的钙矾石,而对其28 d的水化具有抑制作用,水化产物有所减少。

关键词: EVA, 硫铝酸盐水泥, 水化产物, 力学性能, 微观结构, 改性机理

Abstract: The effect of ethylene-vingyl acetate (EVA) on compressive strength, setting time, drying shrinkage, mass loss and internal temperature of calcium sulfoaluminate cement (CSA) paste was studied, and the hydration products and microstructure at the age of 6 h and 28 d were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results show that the setting time of CSA paste decreases significantly with the addition of EVA, and the compressive strength increases at 6 h, but decreases at 1 d, 3 d, and 28 d. The drying shrinkage and mass loss ratio of CSA paste gradually decrease with the increases of EVA. The addition of EVA improves the peak value of the internal temperature curve of CSA paste, and accelerates the appearance time of the peak value. Microscopic analysis shows that EVA could promote the hydration of CSA paste at 6 h, resulting in the formation of more ettringite, while it has inhibitory effect on the hydration of CSA paste at 28 d, and the hydration products reduce.

Key words: EVA, calcium sulfoaluminate cement, hydration product, mechanical property, microstructure, modification mechanism

中图分类号:

TQ172

何香香, 梅军鹏, 姜天华, 李海南, 徐智东, 王智鑫, 周兰兰, 周至阳. EVA对硫铝酸盐水泥净浆微观结构和力学性能的影响[J]. 硅酸盐通报, 2022, 41(8): 2628-2636.

HE Xiangxiang, MEI Junpeng, JIANG Tianhua, LI Hainan, XU Zhidong, WANG Zhixin, ZHOU Lanlan, ZHOU Zhiyang. Effect of EVA on Microstructure and Mechanical Properties of Calcium Sulfoaluminate Cement Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2628-2636.

参考文献

[1] 朱文祥,许锦峰,张海遐,等.预制混凝土构件的常见质量缺陷与修复措施[J].混凝土,2019(5):115-118.
ZHU W X, XU J F, ZHANG H X, et al. Common quality defects and repair methods of precast concrete members[J]. Concrete, 2019(5): 115-118 (in Chinese).
[2] 张磊,张小冬,黄莹,等.高性能聚合物修补砂浆的研究[J].硅酸盐通报,2010,29(4):988-991.
ZHANG L, ZHANG X D, HUANG Y, et al. Research on the high performance repairing polymer mortar[J]. Bulletin of the Chinese Ceramic Society, 2010, 29(4): 988-991 (in Chinese).
[3] 赵维,李东旭,李清海.聚合物改性砂浆综述[J].材料导报,2010,24(11):136-140.
ZHAO W, LI D X, LI Q H. Review of polymer modified mortar[J]. Materials Review, 2010, 24(11): 136-140 (in Chinese).
[4] AL-ZAHRANI M M, MASLEHUDDIN M, AL-DULAIJAN S U, et al. Mechanical properties and durability characteristics of polymer- and cement-based repair materials[J]. Cement and Concrete Composites, 2003, 25(4/5): 527-537.
[5] 杨辉,吴文选,叶显,等.高流态超早强聚合物修补砂浆的性能研究[J].新型建筑材料,2020,47(5):42-45.
YANG H, WU W X, YE X, et al. Research on performance of high flowability and ultra-high early strength polymer repairing mortar[J]. New Building Materials, 2020, 47(5): 42-45 (in Chinese).
[6] MEDEIROS M H F, HELENE P, SELMO S. Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars[J]. Construction and Building Materials, 2009, 23(7): 2527-2533.
[7] 叶丹玫,孙振平,郑柏存,等.聚合物改性水泥基修补材料的研究现状及发展措施[J].材料导报,2012,26(7):131-135.
YE D M, SUN Z P, ZHENG B C, et al. Current research status and development initiative of polymer-modified cementitious repair material[J]. Materials Review, 2012, 26(7): 131-135 (in Chinese).
[8] TIAN Y, JIN X Y, JIN N G, et al. Research on the microstructure formation of polyacrylate latex modified mortars[J]. Construction and Building Materials, 2013, 47: 1381-1394.
[9] 孔祥芝,张恒,韩强,等.聚合物水泥修补砂浆开裂脱空破坏机理浅析与性能改善[J].混凝土,2021(9):109-111+122.
KONG X Z, ZHANG H, HAN Q, et al. Mechanism analysis of crack and void failure of polymer cement repair mortar and performance improvement[J]. Concrete, 2021(9): 109-111+122 (in Chinese).
[10] 沈燕,张伟,陈玺,等.硫铝酸盐水泥改性的研究进展[J].硅酸盐通报,2019,38(3):683-687.
SHEN Y, ZHANG W, CHEN X, et al. Research progress of sulfoaluminate cement modification[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(3): 683-687 (in Chinese).
[11] 孔祥明,李启宏.苯丙乳液改性砂浆的微观结构与性能(英文)[J].硅酸盐学报,2009,37(1):107-114.
KONG X M, LI Q H. Properties and microstructure of polymer modified mortar based on different acrylate latexes[J]. Journal of the Chinese Ceramic Society, 2009, 37(1): 107-114.
[12] 柏玉婷,刘民荣,孙晓云,等.纯丙乳液改性发泡水泥的性能研究[J].硅酸盐通报,2015,34(8):2181-2185.
BAI Y T, LIU M R, SUN X Y, et al. Performance of foamed cement modified with acrylic emulsion[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(8): 2181-2185 (in Chinese).
[13] 乔渊,李运北,李春亮.可再分散聚合物乳胶粉对水泥砂浆微结构性能作用的研究[J].新型建筑材料,2006,33(7):4-8.
QIAO Y, LI Y B, LI C L. Study on effect of re-dispersible polymer emulsion powder on microstructure of cement mortar[J]. New Building Materials, 2006, 33(7): 4-8 (in Chinese).
[14] 石鑫,徐玲玲,冯涛,等.水分散聚合物乳液改性水泥砂浆的研究进展[J].硅酸盐通报,2021,40(8):2497-2507.
SHI X, XU L L, FENG T, et al. Research progress of water dispersed polymer emulsion modified cement mortar[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(8): 2497-2507 (in Chinese).
[15] 何燕,孔亚宁,王啸夫,等.不同羧基密度聚羧酸减水剂对水泥浆体性能的影响[J].建筑材料学报,2018,21(2):185-188.
HE Y, KONG Y N, WANG X F, et al. Influence of polycarboxylate superplasticizers with different carboxylic density on the properties of cement paste[J]. Journal of Building Materials, 2018, 21(2): 185-188 (in Chinese).
[16] 张霄.聚合物改性快速水泥基修补材料及其机理研究[D].西安:西安建筑科技大学,2018.
ZHANG X. Research on property and mechanism of polymer modified rapid cement-based repaired material[D]. Xi'an: Xi'an University of Architecture and Technology, 2018 (in Chinese).
[17] 王茹,王培铭.丁苯乳液和乳胶粉对水泥水化产物形成的影响[J].硅酸盐学报,2008,36(7):912-919+926.
WANG R, WANG P M. Effect of styrene-butadiene rubber latex/powder on cement hydrates[J]. Journal of the Chinese Ceramic Society, 2008, 36(7): 912-919+926 (in Chinese).
[18] 衡艳阳,赵文杰.苯丙乳液改性水泥基材料性能及机理研究进展[J].硅酸盐通报,2014,33(6):1431-1438.
HENG Y Y, ZHAO W J. Research progress on the properties and mechanism of SAEE modified cement based materials[J]. Bulletin of the Chinese Ceramic Society, 2014, 33(6): 1431-1438 (in Chinese).
[19] 况栋梁,龙景潭,张阳,等.VAE改性水泥砂浆微观结构及性能研究[J].应用化工,2020,49(9):2182-2186.
KUANG D L, LONG J T, ZHANG Y, et al. Study on microstructure and properties of VAE modified cement mortar[J]. Applied Chemical Industry, 2020, 49(9): 2182-2186 (in Chinese).
[20] 王超,刘兆爽,赵文杰.聚合物改性水泥基材料的机理研究进展[J].硅酸盐通报,2017,36(4):1254-1257+1265.
WANG C, LIU Z S, ZHAO W J. Research development on mechanism of polymer modified cement based materials[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(4): 1254-1257+1265 (in Chinese).
[21] 张士杰.再生骨料吸水返水特性及其对混凝土收缩的影响[D].北京:北京建筑大学,2019.
ZHANG S J. Water absorption and desorption behavior of recycled aggregate and its effect on concrete shrinkage[D]. Beijing: Beijing University of Civil Engineering and Architecture, 2019 (in Chinese).
[22] WANG R, YAO L J, WANG P M. Mechanism analysis and effect of styrene-acrylate copolymer powder on cement hydrates[J]. Construction and Building Materials, 2013, 41: 538-544.
[23] 王茹,姚丽娟,王培铭.水泥基材料聚合物改性机理研究的最新进展[J].硅酸盐通报,2011,30(4):818-821.
WANG R, YAO L J, WANG P M. Recent research development on mechanism of polymer modification to cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(4): 818-821 (in Chinese).
[24] 荣垂强.聚合物改性钢纤维水泥基复合材料研究及其在工程中的应用[D].汕头:汕头大学,2005.
RONG C Q. Research and structural application of polymer modified steel fiber-cement-base composites[D]. Shantou: Shantou University, 2005 (in Chinese).
[25] 李祝龙,梁乃兴.丁苯类聚合物乳液对水泥水化硬化的影响[J].建筑材料学报,1999,2(1):12-16.
LI Z L, LIANG N X. Influence of SBR polymer on cement hydration and hardening[J]. Journal of Building Materials, 1999, 2(1): 12-16 (in Chinese).
[26] 李德栋.硫铝酸盐水泥的红外光谱研究[J].硅酸盐学报,1984,12(1):119-125.
LI D D. Infrared spectroscopic study of sulfoaluminate cement[J]. Journal of the Chinese Ceramic Society, 1984, 12(1): 119-125 (in Chinese).
[27] 师海霞,孔祥明,范德科,等.苯丙乳液改性混凝土微观结构与性能研究[J].混凝土世界,2010(9):60-65.
SHI H X, KONG X M, FAN D K, et al. Study on microstructure and properties of styrene-acrylic emulsion modified concrete [J]. China Concrete, 2010(9): 60-65 (in Chinese).
[28] ZHAO G R, WANG P M, ZHANG G F. Effect of latex film distributions on flexibility of redispersible polymer powders modified cement mortar evaluated by SEM[J]. Advanced Materials Research, 2015, 1129: 331-338.