温度和激发剂浓度对碱激发矿渣净浆流变特性的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (10): 3442-3449.

温度和激发剂浓度对碱激发矿渣净浆流变特性的影响

陶俊¹, 唐建辉¹, 李平¹, 白银², 刘健³, 温东辉³

1.河海大学土木与交通学院,南京 210098;
2.南京水利科学研究院,南京 210029;
3.中国电建市政建设集团有限公司,天津 300384

收稿日期:2021-04-25 修回日期:2021-05-11 出版日期:2021-10-15 发布日期:2021-11-11
通讯作者: 李平,博士,副教授。E-mail:lipings010@163.com
作者简介:陶俊(1997—),男,硕士研究生。主要从事碱激发材料及防灾减灾方面研究。E-mail:1798347860@qq.com
基金资助:
国家自然科学基金(41977240);国家重点研发计划(2020YFC1511902)

Effects of Temperature and Activator Concentration on Rheological Properties of Alkali Activated Slag Paste

TAO Jun¹, TANG Jianhui¹, LI Ping¹, BAI Yin², LIU Jian³, WEN Donghui³

1. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;
2. Nanjing Hydraulic Research Institute,Nanjing 210029, China;
3. Stecol Corporation, Tianjin 300384, China

Received:2021-04-25 Revised:2021-05-11 Online:2021-10-15 Published:2021-11-11

摘要/Abstract

摘要： 为了获得温度和激发剂浓度对碱激发矿渣净浆流变特性的影响,以NaOH为激发剂,S95粒化高炉矿渣为被激发组分,探讨了不同激发剂浓度(1 mol/L、2 mol/L和3 mol/L)和温度(20 ℃、30 ℃和40 ℃)下矿渣净浆在凝结硬化过程中屈服应力和表观黏度的变化特征。结果表明:以NaOH为激发剂的矿渣净浆表现出非牛顿体特征,屈服应力的发展符合Bingham流体模型。激发剂浓度和温度越高,碱激发矿渣净浆的屈服应力发展越快,并且屈服应力平稳期和增长期时长均随激发剂浓度和的提高而缩短;表观黏度时变模型可通过η=η₀+e^-btⁿ表示,且初始表观黏度η₀、b和n值均随温度和激发剂浓度的提高而提高。

关键词: 碱激发矿渣, 温度, 激发剂浓度, 流变特性, 屈服应力, 时变模型

Abstract: In order to obtain the effects of temperature and activator concentration on the rheological properties of alkali activated slag paste, NaOH was used as the activator and S95 granulated blast furnace slag was used as the activated component. The variation characteristics of yield stress and apparent viscosity of slag paste during setting and hardening were discussed at different activator concentrations (1 mol/L, 2 mol/L and 3 mol/L) and temperatures (20 ℃, 30 ℃ and 40 ℃). The results show that the slag paste with NaOH as the activator shows non-Newtonian characteristy, and the yield stress development conforms to the Bingham fluid model. The higher the concentration and temperature of the activator, the faster the alkali activated slag paste yield stress develops, but the duration of the yield stress stability period and growth period are shortened with the increase of the concentration and temperature of the activator. The time-varying model of apparent viscosity can be represented by η=η₀+e-btⁿ, and the initial apparent viscosity η₀, b and n values all increase with the increase of temperature and the concentration of activator.

Key words: alkali activated slag, temperature, activator concentration, rheological property, yield stress, time varying model

中图分类号:

TU528

陶俊, 唐建辉, 李平, 白银, 刘健, 温东辉. 温度和激发剂浓度对碱激发矿渣净浆流变特性的影响[J]. 硅酸盐通报, 2021, 40(10): 3442-3449.

TAO Jun, TANG Jianhui, LI Ping, BAI Yin, LIU Jian, WEN Donghui. Effects of Temperature and Activator Concentration on Rheological Properties of Alkali Activated Slag Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3442-3449.

参考文献

[1] 刘潮,水中和,高旭,等.碱激发煤矸石-高炉矿渣复合材料性能评价[J].硅酸盐通报,2020,39(9):2877-2884.
LIU C, SHUI Z H, GAO X, et al. Performance evaluation of alkali-activated coal gangue-blast furnace slag composite[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(9): 2877-2884 (in Chinese).
[2] 伍勇华,胡宇博,南峰,等.粉煤灰对碱激发矿渣胶凝材料耐盐酸腐蚀性能的影响[J].硅酸盐通报,2019,38(4):1166-1170+1176.
WU Y H, HU Y B, NAN F, et al. Effect of fly ash on hydrochloric acid corrosion resistance of alkali-activated slag cementitious materials[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(4): 1166-1170+1176 (in Chinese).
[3] ZHU H J, LIANG G W, LI H X, et al. Insights to the sulfate resistance and microstructures of alkali-activated metakaolin/slag pastes[J]. Applied Clay Science, 2021, 202: 105968.
[4] 李爽,刘和鑫,杨永,等.碱激发矿渣/偏高岭土复合胶凝材料干燥收缩机理研究[J].材料导报,2021,35(4):4088-4091.
LI S, LIU H X, YANG Y, et al. Mechanisms of drying shrinkage for alkali-activated slag/metakaolin composite materials[J]. Materials Reports, 2021, 35(4): 4088-4091 (in Chinese).
[5] 吴俊,征西遥,杨爱武,等.矿渣-粉煤灰基地质聚合物固化淤泥质黏土的抗压强度试验研究[J].岩土力学,2021,42(3):647-655.
WU J, ZHENG X Y, YANG A W, et al. Experimental study on the compressive strength of muddy clay solidified by the one-part slag-fly ash based geopolymer[J]. Rock and Soil Mechanics, 2021, 42(3): 647-655 (in Chinese).
[6] 张发文.矿渣胶凝材料胶结矿山尾砂充填性能及机理研究[D].武汉:武汉大学,2009.
ZHANG F W. Investigations on solidified charactertics and mechanism of slag cementitious materials in mine filling[D]. Wuhan: Wuhan University, 2009 (in Chinese).
[7] PUERTAS F, VARGA C, ALONSO M M. Rheology of alkali-activated slag pastes. Effect of the nature and concentration of the activating solution[J]. Cement and Concrete Composites, 2014, 53: 279-288.
[8] YANG T, ZHU H J, ZHANG Z H, et al. Effect of fly ash microsphere on the rheology and microstructure of alkali-activated fly ash/slag pastes[J]. Cement and Concrete Research, 2018, 109: 198-207.
[9] 杨长辉,黄南菊,谢欢,等.氧化石墨烯对碱矿渣胶结材浆体流变性能的影响[J].建筑材料学报,2018,21(6):855-863.
YANG C H, HUANG N J, XIE H, et al. Effect of graphene oxide on the rheological properties of alkali-activated slag paste[J]. Journal of Building Materials, 2018, 21(6): 855-863 (in Chinese).
[10] 相继春,邓笑波,李林鸿,等.石灰石粉对碱激发胶凝体系流变性能的影响[J].广西大学学报(自然科学版),2018,43(6):2347-2354.
XIANG J C, DENG X B, LI L H, et al. Effect of limestone powder on rheological properties of alkali-activated cementitious system[J]. Journal of Guangxi University (Natural Science Edition), 2018, 43(6): 2347-2354 (in Chinese).
[11] 殷素红,管海宇,胡捷,等.碱激发粉煤灰-矿渣灌浆材料的流变性与流动性[J].华南理工大学学报(自然科学版),2019,47(8):120-128+135.
YIN S H, GUAN H Y, HU J, et al. Rheological properties and fluidity of alkali-activated fly ash-slag grouting material[J]. Journal of South China University of Technology (Natural Science Edition), 2019, 47(8): 120-128+135 (in Chinese).
[12] 邵鸿飞,刘元俊,任万杰,等.非牛顿流体黏度测试方法及标准物质研究进展[J].宇航计测技术,2019,39(s1):1-5.
SHAO H F, LIU Y J, REN W J, et al. Research progress of viscosity measurement methods and reference materials for non-Newtonian fluids[J]. Journal of Astronautic Metrology and Measurement, 2019, 39(s1): 1-5 (in Chinese).
[13] JIANG H Q, FALL M, LIANG C. Yield stress of cemented paste backfill in sub-zero environments: experimental results[J]. Minerals Engineering, 2016, 92: 141-150.
[14] WU D, FALL M, CAI S J. Coupling temperature, cement hydration and rheological behaviour of fresh cemented paste backfill[J]. Minerals Engineering, 2013, 42: 76-87.
[15] LI P, TANG J H, BAI Y, et al. Experimental study on the pH for activating ground granulated blast-furnace slag activity at different temperatures[J]. Sadhana-Academy Proceedings in Engineering Sciences, 2019, 44(10): 1-12.