不同化学激发剂对再生微粉活性的影响及机理研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1409-1417.

所属专题：资源综合利用

不同化学激发剂对再生微粉活性的影响及机理研究

陈俊松¹, 乔敏¹, 吴庆勇¹, 李贞^1,2, 赵爽¹

1.江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室,南京 211103;
2.江苏省建筑科学研究院有限公司,南京 210008

收稿日期:2022-12-22 修订日期:2023-02-15 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 乔敏,博士,教授级高级工程师。E-mail:qiaomin@cnjsjk.cn
作者简介:陈俊松(1995—),男,工程师。主要从事速凝剂与喷射混凝土的研究。E-mail:chenjunsong@cnjsjk.cn
基金资助:
国家重点研发计划(2020YFC1909900)

Effects and Mechanism Research of Different Chemical Activators on Activity of Recycled Fine Powder

CHEN Junsong¹, QIAO Min¹, WU Qingyong¹, LI Zhen^1,2, ZHAO Shuang¹

1. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China;
2. Jiangsu Research Institute of Building Science Co., Ltd., Nanjing 210008, China

Received:2022-12-22 Revised:2023-02-15 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 再生微粉由于活性较低,难以被有效利用,造成极大的资源浪费。为激发再生微粉的活性,本文研究了四种传统碱激发剂(氢氧化钠、氢氧化钙、氢氧化镁、水玻璃)、两种醇胺类激发剂(多元异构醇胺、三乙醇胺)和一种纳米晶核型激发剂对掺再生微粉砂浆抗压强度的影响,并通过分析化学激发剂对再生微粉-水泥浆体水化放热、水化产物及微观结构的影响揭示其提升机理。结果表明:氢氧化钠和水玻璃会导致掺再生微粉砂浆的抗压强度进一步降低,且砂浆强度与氢氧化钠和水玻璃的掺量成反比;氢氧化钙、氢氧化镁、三乙醇胺和纳米晶核型激发剂在一定掺量条件下可以提高早期强度,但无法提高后期强度;多元异构醇胺激发剂的掺入明显促进了矿物相铝酸三钙(C₃A)与铁铝酸四钙(C₄AF)的水化,从而加快再生微粉-水泥浆体的水化进程,提高水泥基体的密实度并改善水泥基体与砂的界面黏结情况,使砂浆各龄期抗压强度明显提高,在最佳掺量0.2%(质量分数)时再生微粉的活性指数由62.8%提升至74.8%。研究成果可为提高再生微粉的利用率从而实现建筑行业节能减排目标提供借鉴和参考。

关键词: 再生微粉, 化学激发剂, 活性指数, 水泥水化, 界面黏结

Abstract: Recycled fine powder (RFP) is difficult to be effectively utilized due to its low activity, resulting in a great waste of resources. To stimulate the activity of RFP, the effects of traditional alkali activators (sodium hydroxide, calcium hydroxide, magnesium hydroxide, sodium silicate), alcohol amine activators (polyisomeric alcoholic amine, triethanolamine) and nanocrystalline nuclear activator on the compressive strength of mortars mixed with RFP were investigated. Meanwhile, the effects of chemical activators on the hydration heat release, hydration products and microstructure of RFP-cement pastes were analyzed to reveal their promotion mechanism. The results show that sodium hydroxide and sodium silicate can further reduce the compressive strength of mortars mixed with RFP, and the relationships are linear inverse with their dosage. Calcium hydroxide, magnesium hydroxide,triethanolamine and nanocrystalline nuclear activator can improve the early strength under certain dosage conditions, but can not improve the later strength. Polyisomeric alcoholic amine can significantly improve the compressive strength of each age through promoting the hydration of mineral phases tricalcium aluminate (C₃A) and tetracalcium aluminoferrite (C₄AF), accelerating the hydration process of RFP-cement pastes, improving the compactness of the interfacial bond between cement matrix and sand. The activity index of RFP increases from 62.8% to 74.8% at the optimal dosage of 0.2% (mass fraction). The research results can provide reference for improving the utilization rate of RFP and achieving the goal of energy conservation and emission reduction in the construction industry.

Key words: recycled fine powder, chemical activator, activity index, hydration of cement, interfacial bond

中图分类号:

TU528

陈俊松, 乔敏, 吴庆勇, 李贞, 赵爽. 不同化学激发剂对再生微粉活性的影响及机理研究[J]. 硅酸盐通报, 2023, 42(4): 1409-1417.

CHEN Junsong, QIAO Min, WU Qingyong, LI Zhen, ZHAO Shuang. Effects and Mechanism Research of Different Chemical Activators on Activity of Recycled Fine Powder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1409-1417.

参考文献

[1] TANG Q, MA Z M, WU H X, et al. The utilization of eco-friendly recycled powder from concrete and brick waste in new concrete: a critical review[J]. Cement and Concrete Composites, 2020, 114: 103807.
[2] 李贞, 刘加平, 乔敏, 等. 基于减水剂吸附行为的再生微粉-水泥浆体黏度调控机理研究[J/OL]. 材料导报, 2023, 37(8): 21090090 [2022-12-22]. https://kns.cnki.net/kcms/detail/50.1078.TB.20220928.1027.002.html.
LI Z, LIU J P, QIAO M, et al. Mechanism of viscosity for recycled powder-cement paste based on the adsorption of superplasticizer[J/OL]. Materials Reports, 2023, 37(8): 21090090 [2022-12-22]. https://kns.cnki.net/kcms/detail/50.1078.TB.20220928.1027.002.html (in Chinese).
[3] 刘超, 胡天峰, 刘化威, 等. 再生复合微粉对混凝土力学性能及微观结构的影响[J]. 建筑材料学报, 2021, 24(4): 726-735.
LIU C, HU T F, LIU H W, et al. Effect of recycled composite micro-powder on mechanical properties and microstructure of concrete[J]. Journal of Building Materials, 2021, 24(4): 726-735 (in Chinese).
[4] YUAN C F, WANG D, SETIAWAN H, et al. Effect and mechanism of different excitation modes on the activities of the recycled brick micropowder[J]. Science and Engineering of Composite Materials, 2021, 28(1): 676-688.
[5] 康晓明, 李滢, 樊耀虎. 不同激发方式对再生微粉性能的影响研究[J]. 硅酸盐通报, 2019, 38(4): 1135-1139.
KANG X M, LI Y, FAN Y H. Effect of different excitation methods on the properties of recycled concrete powder[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(4): 1135-1139 (in Chinese).
[6] 屈孟娇. 化学-热处理耦合激发废弃混凝土再生微粉研究[D]. 开封: 河南大学, 2022.
QU M J. Research on the activation of recycled powder from waste concrete under chemical-thermal coupling[D]. Kaifeng: Henan University, 2022 (in Chinese).
[7] XU J, KANG A H, WU Z G, et al. The effect of mechanical-thermal synergistic activation on the mechanical properties and microstructure of recycled powder geopolymer[J]. Journal of Cleaner Production, 2021, 327: 129477.
[8] LU B, SHI C J, ZHANG J K, et al. Effects of carbonated hardened cement paste powder on hydration and microstructure of Portland cement[J]. Construction and Building Materials, 2018, 186: 699-708.
[9] QIN L, GAO X J. Recycling of waste autoclaved aerated concrete powder in Portland cement by accelerated carbonation[J]. Waste Management, 2019, 89: 254-264.
[10] ZHANG D S, ZHANG S X, HUANG B W, et al. Comparison of mechanical, chemical, and thermal activation methods on the utilisation of recycled concrete powder from construction and demolition waste[J]. Journal of Building Engineering, 2022, 61: 105295.
[11] 周长顺, 吉红波, 赵丽颖. 再生微粉在水泥基材料中的应用与研究进展[J]. 硅酸盐通报, 2019, 38(8): 2456-2463.
ZHOU C S, JI H B, ZHAO L Y. Application and research progress of recycled micro-powders in cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(8): 2456-2463 (in Chinese).
[12] 田青, 屈孟娇, 张苗, 等. 废弃混凝土再生微粉激活方式研究进展[J]. 硅酸盐通报, 2020, 39(8): 2476-2485.
TIAN Q, QU M J, ZHANG M, et al. Research progress on activation way of recycled powder of waste concrete[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(8): 2476-2485 (in Chinese).
[13] 庞超明, 唐志远, 杨志远, 等. 水泥基材料中的早强剂及其作用机理综述[J/OL]. 材料导报, 2023, 37(9): 21110247 [2022-12-22]. https://kns.cnki.net/kcms/detail/50.1078.tb.20220707.1048.006.html.
PANG C M, TANG Z Y, YANG Z Y, et al. Review of early strengthening agent and its mechanism in cementitious composites[J/OL]. Materials Reports, 2023, 37(9): 21110247 [2022-12-22]. https://kns.cnki.net/kcms/detail/50.1078.tb.20220707.1048.006.html (in Chinese).
[14] 李琴, 张春红, 孙可伟. 不同激发剂激发建筑垃圾再生微粉活性研究[J]. 硅酸盐通报, 2016, 35(7): 2187-2192+2197.
LI Q, ZHANG C H, SUN K W. Preliminary study on micronized active regeneration experiment with different activator excitation construction waste[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(7): 2187-2192+2197 (in Chinese).
[15] 董自修. 碱激发制备废弃混凝土地聚物基再生材料[D]. 大连: 大连理工大学, 2018.
DONG Z X. Production of geopolymer-based recycled materials from waste concrete by alkalia-activation[D]. Dalian: Dalian University of Technology, 2018 (in Chinese).
[16] 李兰. 有机无机纳米杂化材料对水泥水化的影响及机理研究[D]. 重庆: 重庆大学, 2020.
LI L. Study on the influence and mechanism of nano organic and inorganic hybrid materials on cement hydration[D]. Chongqing: Chongqing University, 2020 (in Chinese).
[17] 田培, 刘加平, 王玲, 等. 混凝土外加剂手册[M]. 北京: 化学工业出版社, 2009: 109.
TIAN P, LIU J P, WANG L, et al. Handbook of concrete admixtures[M]. Beijing: Chemical Industry Press, 2009: 109 (in Chinese).
[18] 孔祥明, 卢子臣, 张朝阳. 水泥水化机理及聚合物外加剂对水泥水化影响的研究进展[J]. 硅酸盐学报, 2017, 45(2): 274-281.
KONG X M, LU Z C, ZHANG C Y. Recent development on understanding cement hydration mechanism and effects of chemical admixtures on cement hydration[J]. Journal of the Chinese Ceramic Society, 2017, 45(2): 274-281 (in Chinese).
[19] 安明喆, 张戈, 韩松. 速凝剂主要组成对水泥水化影响机理研究[J]. 铁道工程学报, 2019, 36(11): 74-81.
AN M Z, ZHANG G, HAN S. Research on the influence mechanism of accelerator main components on cement hydration[J]. Journal of Railway Engineering Society, 2019, 36(11): 74-81 (in Chinese).

不同化学激发剂对再生微粉活性的影响及机理研究

Effects and Mechanism Research of Different Chemical Activators on Activity of Recycled Fine Powder

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