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

Abstract

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

CLC Number:

TU528

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.

References

[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.