改性醇胺对水泥性能的影响及作用机制

摘要/Abstract

摘要： 针对市售增强剂中改性醇胺组分作用机理不清晰的问题,本文探究了改性醇胺(CS_M、CS_N和CS_O)对净浆凝结时间和强度的影响,并通过水化热、水泥石定量XRD、微观结构SEM测试,探究了改性醇胺对水泥水化过程、水化产物及浆体微观结构的影响,并与三异丙醇胺(TIPA)进行对比。结果表明:TIPA与改性醇胺均表现出缓凝的性质,其中CS_O缓凝性最强;在强度方面,TIPA改善了测试龄期内的净浆强度发展,CS_M改善了净浆7~28 d强度发展,改善效果优于TIPA,CS_N和CS_O对强度存在负面效果。在机理方面,CS_M的掺入提高了水泥矿物相水化程度,优化了水化速率,改善了水化产物微观结构,促使水化硅酸钙(C-S-H)、Ca(OH)₂和钙矾石相互交错,提升了浆体致密性;TIPA促进了铁铝酸四钙(C₄AF)的水化;CS_N和CS_O促进了硅酸三钙(C₃S)和C₄AF的水化,但矿物相快水化反应与致密微观结构未能实现协同。改性措施方面,使用TIPA进行分子量改性相比于氨基与羟基改性更有助于改善水泥水化进程、产物分布结构及促进水泥净浆强度发展。

关键词: 改性醇胺, 凝结时间, 强度, 水化程度, 微观结构

Abstract: In view of the unclear action mechanism of modified alcohol amine in commercial reinforcers, the effects of modified alcohol amine (CS_M, CS_N and CS_O) on setting time and strength of paste were investigated, and the effects of modified alcohol amine on cement hydration process, hydration products and microstructure of paste were investigated by means of hydration heat, cement quantitative XRD and microstructure SEM test, and compared with triisopropanolamine (TIPA). The results show that TIPA, modified alcohol amine all show retarding properties, and CS_O has the strongest retarding property. In terms of strength, TIPA improves the strength development of cement paste during the test age, and CS_M improves the strength development of cement paste for 7~28 d, and the improvement effect is better than that of TIPA, CS_N and CS_O have negative effects on strength. In terms of mechanism, the addition of CS_M increases the hydration degree of cement mineral phase, optimizes the hydration rate, improves the microstructure of hydration products, promotes the interlacing of C-S-H, Ca(OH)₂ and ettringite, and improves the compactness of paste. TIPA promotes the hydration of C₄AF. CS_N and CS_O promote the hydration of C₃S and C₄AF, but the rapid hydration of mineral phase and compact microstructure can not achieve coordination. In terms of modification measures, compared with amino and hydroxyl modification, TIPA molecular weight modification is more helpful to improve cement hydration process, product distribution structure and promote the development of cement paste strength.

Key words: modified alcohol amine, setting time, strength, hydration degree, microstructure

中图分类号:

TU528

刘春舵, 刘凯, 宁朝阳, 穆松, 杨京, 蔡景顺. 改性醇胺对水泥性能的影响及作用机制[J]. 硅酸盐通报, 2024, 43(10): 3541-3551.

LIU Chunduo, LIU Kai, NING Chaoyang, MU Song, YANG Jing, CAI Jingshun. Effect of Modified Alcohol Amine on Properties of Cement and Its Mechanism[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(10): 3541-3551.

参考文献

[1] 肖建庄, 邓琪, 夏冰. 混凝土制备低碳化演进与展望[J]. 建筑科学与工程学报, 2022, 39(5): 1-12.
XIAO J Z, DENG Q, XIA B. Evolution and prospects of low-carbon concrete preparation[J]. Journal of Architecture and Civil Engineering, 2022, 39(5): 1-12 (in Chinese).
[2] AITCIN P, MINDESSM S. Sustainability of concrete (modern concrete technology)[M]. London: Spon Press, 2011.
[3] 岑晓倩, 张亚庆. 混凝土CO₂排放计算和评价的研究进展[J]. 绿色科技, 2022, 24(20): 136-141.
CEN X Q, ZHANG Y Q. Research progress in calculation and evaluation of CO₂ emissions from concrete[J]. Journal of Green Science and Technology, 2022, 24(20): 136-141 (in Chinese).
[4] FLOWER D J M, SANJAYAN J G. Green house gas emissions due to concrete manufacture[J]. The International Journal of Life Cycle Assessment, 2007, 12(5): 282-288.
[5] YERRAMALA A, GANESH BABU K. Transport properties of high volume fly ash roller compacted concrete[J]. Cement and Concrete Composites, 2011, 33(10): 1057-1062.
[6] KASTIUKAS G, RUAN S Q, LIANG S, et al. Development of precast geopolymer concrete via oven and microwave radiation curing with an environmental assessment[J]. Journal of Cleaner Production, 2020, 255: 120290.
[7] RAO F, LIU Q. Geopolymerization and its potential application in mine tailings consolidation: a review[J]. Mineral Processing and Extractive Metallurgy Review, 2015, 36(6): 399-409.
[8] LOPEZ GAYARRE F, GONZALEZ PEREZ J, LOPEZ-COLINA PEREZ C, et al. Life cycle assessment for concrete kerbs manufactured with recycled aggregates[J]. Journal of Cleaner Production, 2016, 113: 41-53.
[9] ESTANQUEIRO B, DINIS SILVESTRE J, DE BRITO J, et al. Environmental life cycle assessment of coarse natural and recycled aggregates for concrete[J]. European Journal of Environmental and Civil Engineering, 2018, 22(4): 429-449.
[10] 王建刚, 张金喜, 郭阳阳, 等. 不同因素对混凝土抗氯离子渗透性的影响机理[J]. 混凝土, 2018(8): 49-53.
WANG J G, ZHANG J X, GUO Y Y, et al. Influence mechanism of different factors on chloride ion penetration of concrete[J]. Concrete, 2018(8): 49-53 (in Chinese).
[11] 虞夏深. 水灰比与掺合料对混凝土抗氯离子渗透性能的影响[J]. 大连大学学报, 2017, 38(6): 47-49.
YU X S. The effects of water cement ratio and the admixture of concrete resistance to chloride ion penetration[J]. Journal of Dalian University, 2017, 38(6): 47-49 (in Chinese).
[12] 孔祥明, 路振宝, 闫娟, 等. 三乙醇胺对水化过程中水泥浆体液相离子浓度的影响[J]. 硅酸盐学报, 2013, 41(7): 981-986.
KONG X M, LU Z B, YAN J, et al. Influence of triethanolamine on elemental concentrations in aqueous phase of hydrating cement pastes[J]. Journal of the Chinese Ceramic Society, 2013, 41(7): 981-986 (in Chinese).
[13] 马保国, 许永和, 董荣珍. 三乙醇胺对水泥初始结构和力学性能的影响[J]. 建筑材料学报, 2006, 9(1): 6-9.
MA B G, XU Y H, DONG R Z. Influence of triethanolmine on the initial structure formation and mechanical properties of cement[J]. Journal of Building Materials, 2006, 9(1): 6-9 (in Chinese).
[14] 徐芝强, 徐凯, 孙晋峰, 等. 新型链烷醇胺对水泥水化硬化的影响[J]. 硅酸盐学报, 2017, 45(8): 1113-1120.
XU Z Q, XU K, SUN J F, et al. Effect of new alkanolamines on cement hydration and hardening[J]. Journal of the Chinese Ceramic Society, 2017, 45(8): 1113-1120 (in Chinese).
[15] 史才军, 刘慧, 李平亮, 等. 三异丙醇胺对石灰石硅酸盐水泥的水化机理及微观结构的影响[J]. 硅酸盐学报, 2011, 39(10): 1673-1681.
SHI C J, LIU H, LI P L, et al. Effects of triisopropanolamine on hydration and microstructure of Portland limestone cement[J]. Journal of the Chinese Ceramic Society, 2011, 39(10): 1673-1681 (in Chinese).
[16] 王习, 张云升, 张宇, 等. CTF增效剂提升混凝土抗冻性能研究[J/OL]. 材料导报: 1-15 (2023-09-26)[2024-07-05]. http://kns.cnki.net/kcms/detail/50.1078.TB.20230922.1347.018.html.
WANG X, ZHANG Y S, ZHANG Y, et al. Study on improving frost resistance of concrete with CTF synergist[J/OL]. Materials Reports: 1-15 (2023-09-26) [2024-07-05]. http://kns.cnki.net/kcms/detail/50.1078.TB.20230922.1347.018.html (in Chinese).
[17] 赵杨, 陈晨, 孙海燕, 等. 增效剂对混凝土性能影响的试验研究[J]. 粉煤灰综合利用, 2021, 35(3): 78-82.
ZHAO Y, CHEN C, SUN H Y, et al. Experimental study on the effect of synergist on concrete performance[J]. Fly Ash Comprehensive Utilization, 2021, 35(3): 78-82 (in Chinese).
[18] 刘凯, 穆松, 蔡景顺, 等. 增效剂对混凝土力学性能和耐久性能的影响研究[J]. 新型建筑材料, 2020, 47(9): 127-130.
LIU K, MU S, CAI J S, et al. Effect of concrete synergist on mechanical properties and durability of concrete[J]. New Building Materials, 2020, 47(9): 127-130 (in Chinese).
[19] 马磊. CTF增效剂对混凝土耐久性能的影响研究[J]. 混凝土世界, 2023(2): 19-24.
MA L. Study on the effect of CTF synergist on the durability of concrete[J]. China Concrete, 2023(2): 19-24 (in Chinese).
[20] 张志杰, 代金鹏, 杨小媛, 等. 低气压养护对水泥净浆性能的影响[J]. 硅酸盐通报, 2023, 42(10): 3439-3444.
ZHANG Z J, DAI J P, YANG X Y, et al. Effect of low air pressure curing on performance of cement paste[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(10): 3439-3444 (in Chinese).
[21] 雷龙坚, 郝勇, 袁满, 等. 基于声发射和DIC的碳纳米管水泥基材料抗压力学性能研究[J]. 硅酸盐通报, 2023, 42(12): 4233-4241.
LEI L J, HAO Y, YUAN M, et al. Study on compressive mechanical properties of carbon nanotube cement-based materials based on acoustic emission and DIC[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(12): 4233-4241 (in Chinese).
[22] 周玉婉, 陈四利, 杨凯锋, 等. 稻壳灰对水泥基材料力学性能的影响研究[J]. 混凝土, 2023(8): 82-86.
ZHOU Y W, CHEN S L, YANG K F, et al. Effect of rice husk ash on mechanical properties of cement-based materials[J]. Concrete, 2023(8): 82-86 (in Chinese).
[23] 廖宜顺, 陈佳文, 张天潇. 苎麻纤维增强硫铝酸盐水泥基材料的力学性能与体积变形[J]. 建筑材料学报, 2023, 26(11): 1166-1172.
LIAO Y S, CHEN J W, ZHANG T X. Mechanical properties and volumetric deformation of ramie fiber reinforced calcium sulfoaluminate cement-based materials[J]. Journal of Building Materials, 2023, 26(11): 1166-1172 (in Chinese).
[24] KONG X M, LU Z B, LIU H, et al. Influence of triethanolamine on the hydration and the strength development of cementitious systems[J]. Magazine of Concrete Research, 2013, 65(18): 1101-1109.
[25] 张浩. 水化温升调节剂对水泥基材料水化行为的影响[D]. 南京: 东南大学, 2020.
ZHANG H. Effect of temperature rising inhibitor on hydration behaviour of cementitious materials[D]. Nanjing: Southeast University, 2020 (in Chinese).
[26] GARTNER E M, JENNINGS H M. Thermodynamics of calcium silicate hydrates and their solutions[J]. Journal of the American Ceramic Society, 1987, 70(10): 743-749.
[27] 李强强. 高铁用醇胺类早强剂对水泥石力学性能及微观结构的影响[D]. 北京: 北京交通大学, 2019.
LI Q Q. Influences of alkanolamine accelerators used in high-speed railway on the mechanical properties and microstructure of hardened cement pastes[D]. Beijing: Beijing Jiaotong University, 2019 (in Chinese).
[28] 卢子臣. 不同官能团有机外加剂对水泥水化的影响规律及机理分析[D]. 北京: 清华大学, 2017.
LU Z C. Effect of chemical admixtures with different functional groups on cement hydration and the mechanisms[D]. Beijing: Tsinghua University, 2017 (in Chinese).
[29] 钱觉时. 建筑材料学[M]. 武汉: 武汉理工大学出版社, 2007.
QIAN J S. Building materials science[M]. Wuhan: Wuhan University of Technology Press, 2007 (in Chinese).
[30] 张金山. 钙矾石形貌调控及其机理研究[D]. 北京: 中国建筑材料科学研究总院, 2017.
ZHANG J S. Study on the regulation of ettringite morphology and its mechanism[D]. Beijing: China Building Materials Academy, 2017 (in Chinese).
[31] 朱建平, 朱丽飞, 冯春花, 等. 片状纳米勃姆石对水泥力学及微观性能的影响[J]. 硅酸盐通报, 2021, 40(11): 3556-3564.
ZHU J P, ZHU L F, FENG C H, et al. Effect of flaky nano boehmite on mechanical and microscopic properties of cement[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(11): 3556-3564 (in Chinese).