三乙醇胺助磨剂对蔗渣灰颗粒特性及蔗渣灰砂浆性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (3): 931-939.

三乙醇胺助磨剂对蔗渣灰颗粒特性及蔗渣灰砂浆性能的影响

李舒阳^1,2, 陈正^1,2, 韦京利^1,2, 陈犇^1,2, 李腾宇¹

1.广西大学土木建筑工程学院,工程防灾与结构安全教育部重点实验室,南宁 530004;
2.广西大学广西防灾减灾与工程安全重点实验室,南宁 530004

收稿日期:2021-11-16 修回日期:2022-01-09 出版日期:2022-03-15 发布日期:2022-04-08
通讯作者: 韦京利,博士研究生。E-mail:weijl@st.gxu.edu.cn
作者简介:李舒阳(1996—),男,硕士研究生。主要从事混凝土性能调控与设计研究。E-mail:694739121@qq.com
基金资助:
国家自然科学基金(51738004,51762004);广西创新驱动发展专项(GKAA18242007,GKAA18118029)

Effect of Triethanolamine Grinding Aid on Bagasse Ash Particle Characteristics and Properties of Bagasse Ash Mortar

LI Shuyang^1,2, CHEN Zheng^1,2, WEI Jingli ^1,2, CHEN Ben^1,2, LI Tengyu¹

1. Key Laboratory of Engineering Disaster Prevention and Structural Safety of Ministry of Eduction, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
2. Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China

Received:2021-11-16 Revised:2022-01-09 Online:2022-03-15 Published:2022-04-08

摘要/Abstract

摘要： 为研究不同质量掺量三乙醇胺(TEA)作助磨剂对蔗渣灰颗粒特性的影响,通过方孔筛筛余量、粒径分布、比表面积和颗粒形貌测试对蔗渣灰颗粒特性进行表征,研究蔗渣灰颗粒特性对蔗渣灰砂浆强度及抗氯盐侵蚀性的影响。结果表明,TEA可优化蔗渣灰颗粒粒径分布,在最佳质量掺量0.08%条件下,＜32 μm的颗粒占比增加8.2个百分点,比表面积可提升至5.503 5 m²/g,颗粒形貌更趋于圆球状。同时,蔗渣灰砂浆的强度和抗氯盐侵蚀性能随着TEA掺量的增加呈现先增后降的变化规律,TEA在0.08%(质量分数)最佳掺量时,蔗渣灰砂浆的抗压强度相比于普通水泥砂浆提升19.88%,氯离子扩散系数下降79.63%。通过X射线衍射和压汞孔分析测试揭示了蔗渣灰颗粒特性对蔗渣灰砂浆性能的影响机理,研究表明:经过TEA助磨剂优化后的蔗渣灰火山灰反应活性得到提升,蔗渣灰砂浆基体中生成更多水化产物,提高了密实度;优化后的蔗渣灰颗粒充分发挥了填充效应,降低蔗渣灰砂浆的孔隙率,提高了蔗渣灰砂浆的强度和抗氯盐侵蚀性能。

关键词: 三乙醇胺, 助磨剂, 蔗渣灰, 颗粒特性, 强度, 抗氯离子侵蚀

Abstract: In order to study the effects of different mass dosage of triethanolamine (TEA) as grinding aid on the particle properties of bagasse ash, the particle properties of bagasse ash were characterized by sieve residue test, BET, particle size distribution test and particle shape test, the effects of bagasse ash particle properties on the strength and chloride resistance of bagasse ash mortar were investigated. The results show that TEA optimizes the particle size distribution of bagasse ash, and the proportion of particles smaller than 32 μm increases by 8.2 percentage point, the specific surface area increases to 5.503 5 m²/g, and the particle shape tends to be spherical under the optimal addition of 0.08% (mass fraction).Meanwhile, the strength and chloride resistance of bagasse ash mortar show a pattern of increase first and then decrease with the increase of TEA content; the compressive strength of bagasse ash mortar increases by 19.88% and the chloride ion diffusion coefficient drops by 79.63% compared with normal concrete when TEA dosage is optimally at 0.08%. The mechanism of the influence of bagasse ash particle properties on the performance of bagasse ash mortar is revealed by X-ray diffraction (XRD) and mercury intrusion porosimetry (MIP). Results show that the pozzolanic activity of bagasse ash optimized by TEA is enhanced, and more hydration products are generated in the bagasse ash mortar matrix to improve the compactness. The optimized bagasse ash particles give full play to the filling effect, reduce the void ratio of bagasse ash mortar, and improve the the mortar strength and resistance to chloride salt erosion.

Key words: triethanolamine, grinding aid, bagasse ash, particle characteristic, strength, chloride ion resistance

中图分类号:

TU528

李舒阳, 陈正, 韦京利, 陈犇, 李腾宇. 三乙醇胺助磨剂对蔗渣灰颗粒特性及蔗渣灰砂浆性能的影响[J]. 硅酸盐通报, 2022, 41(3): 931-939.

LI Shuyang, CHEN Zheng, WEI Jingli , CHEN Ben, LI Tengyu. Effect of Triethanolamine Grinding Aid on Bagasse Ash Particle Characteristics and Properties of Bagasse Ash Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(3): 931-939.

参考文献

[1] YADAV A L, SAIRAM V, MURUGANANDAM L, et al. An overview of the influences of mechanical and chemical processing on sugarcane bagasse ash characterisation as a supplementary cementitious material[J]. Journal of Cleaner Production, 2020, 245: 118854.
[2] KATARE V D, MADURWAR M V. Experimental characterization of sugarcane biomass ash: a review[J]. Construction and Building Materials, 2017, 152: 1-15.
[3] CORDEIRO G C, TAVARES L M, TOLEDO FILHO R D. Improved pozzolanic activity of sugar cane bagasse ash by selective grinding and classification[J]. Cement and Concrete Research, 2016, 89: 269-275.
[4] ZHAO J H, LI D L, LIAO S C, et al. Influence of mechanical grinding on pozzolanic characteristics of circulating fluidized bed fly ash (CFA) and resulting consequences on hydration and hardening properties of blended cement[J]. Journal of Thermal Analysis and Calorimetry, 2018, 132(3): 1459-1470.
[5] BAHURUDEEN A, SANTHANAM M. Influence of different processing methods on the pozzolanic performance of sugarcane bagasse ash[J]. Cement and Concrete Composites, 2015, 56: 32-45.
[6] CHUSILP N, JATURAPITAKKUL C, KIATTIKOMOL K. Effects of LOI of ground bagasse ash on the compressive strength and sulfate resistance of mortars[J]. Construction and Building Materials, 2009, 23(12): 3523-3531.
[7] ZHAO J H, WANG D M, WANG X G, et al. Ultrafine grinding of fly ash with grinding aids: impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash[J]. Construction and Building Materials, 2015, 78: 250-259.
[8] 赵计辉,王栋民,王学光,等.改性三乙醇胺助磨剂对粉煤灰水泥的助磨性能[J].非金属矿,2015,38(1):25-28.
ZHAO J H, WANG D M, WANG X G, et al. Effect of modified triethanolamine grinding aids on grinding performance of fly ash cement[J]. Non-Metallic Mines, 2015, 38(1): 25-28 (in Chinese).
[9] 李翔.助磨剂单组分对水泥与熟料矿物水化及性能影响的研究[D].武汉:武汉理工大学,2011.
LI X. Research on the influence of single-component grinding aids on hydration and performance of Portland cement and clinker minerals[D]. Wuhan: Wuhan University of Technology, 2011 (in Chinese).
[10] 王晓钧,陈悦,周洪庆,等.粉煤灰机械研磨过程中硅氧四面体结构的变化趋向[J].硅酸盐学报,2001,29(4):389-391.
WANG X J, CHEN Y, ZHOU H Q, et al. Changes of silicate tetrahedron of fly ash in mechanical grinding[J]. Journal of the Chinese Ceramic Society, 2001, 29(4): 389-391 (in Chinese).
[11] 胡瑞珍.助磨剂对水泥性能影响的研究[D].长沙:湖南大学,2010.
HU R Z. Research of grinding aids' effect on the properties of cement[D]. Changsha: Hunan University, 2010 (in Chinese).
[12] PRZIWARA P, HAMILTON L D, BREITUNG-FAES S, et al. Impact of grinding aids and process parameters on dry stirred media milling[J]. Powder Technology, 2018, 335: 114-123.
[13] FRANCO-LUJÁN V A, MALDONADO-GARCÍA M A, MENDOZA-RANGEL J M, et al. Chloride-induced reinforcing steel corrosion in ternary concretes containing fly ash and untreated sugarcane bagasse ash[J]. Construction and Building Materials, 2019, 198: 608-618.
[14] CORDEIRO G C, TOLEDO FILHO R D, TAVARES L M, et al. Pozzolanic activity and filler effect of sugar cane bagasse ash in Portland cement and lime mortars[J]. Cement and Concrete Composites, 2008, 30(5): 410-418.
[15] MODANI P O, VYAWAHARE M R. Utilization of bagasse ash as a partial replacement of fine aggregate in concrete[J]. Procedia Engineering, 2013, 51: 25-29.
[16] ZHANG Y R, KONG X M, LU Z C, et al. Influence of triethanolamine on the hydration product of portlandite in cement paste and the mechanism[J]. Cement and Concrete Research, 2016, 87: 64-76.
[17] HEINZ D, GÖBEL M, HILBIG H, et al. Effect of TEA on fly ash solubility and early age strength of mortar[J]. Cement and Concrete Research, 2010, 40(3): 392-397.
[18] 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).
[19] 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).
[20] CORDEIRO G C, TOLEDO F R D, TAVARES L M, et al. Ultrafine grinding of sugar cane bagasse ash for application as pozzolanic admixture in concrete[J]. Cement and Concrete Research, 2009, 39(2): 110-115.