Utilizing coal bottom ash as a fine aggregate in mortar: the effectiveness of pre-treatment methods
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Từ khóa:
Coal bottom ash
pre-treatment method
flexural strength
compressive strength
durability
Tóm tắt
The increasing demand for sustainable construction materials has encouraged the use of industrial by-products as sand replacements in mortar. Coal bottom ash (CBA), a by-product of thermal power plants, shows potential as a fine aggregate but has high porosity and weak bonding. This study examines Na₂CO₃ pre-treatment (0.1 M and 0.25 M) to enhance performance of CBA a full sand replacement in mortars. Mechanical strength, ultrasonic pulse velocity (UPV), drying shrinkage, water absorption, and rapid chloride ion penetration (RCPT) were tested. At 28 days, 0.25 M-treated CBA increased flexural and compressive strengths by 44.5% and 29.9%, respectively, and UPV by 6.6%. Drying shrinkage and water absorption decreased by 18.2% and 13.6%, while RCPT dropped 20.1%. These findings confirm that Na₂CO₃ pre-treatment, particularly at 0.25 M, markedly improves strength and durability, making CBA a viable and sustainable fine aggregate alternative.
Tài liệu tham khảo
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[1] A. Mehta and R. Siddique, "Sustainable geopolymer concrete using ground granulated blast furnace slag and rice husk ash: Strength and permeability properties", Journal of Cleaner Production, vol. 205, pp. 49–57, 2018.
[2] T.-P. Huynh, L. S. Ho, and Q. V. Ho, "Experimental investigation on the performance of concrete incorporating fine dune sand and ground granulated blast-furnace slag", Construction and Building Materials, vol. 347, pp. 128512, 2022.
[3] P. Chindasiriphan, B. Meenyut, S. Orasutthikul, P. Jongvivatsakul, and W. Tangchirapat, "Influences of high-volume coal bottom ash as cement and fine aggregate replacements on strength and heat evolution of eco-friendly high-strength concrete", Journal of Building Engineering, vol. 65, pp. 105791, 2023.
[4] H.J. Kim, Y. Yamada, H. Zeng, and M. Iwanami, "A study of chloride pretreatment methods for enhancing strength of mortar by recycling municipal solid waste incineration (MSWI) bottom ash", Case Studies in Construction Materials, vol. 19, pp. e02349, 2023.
[5] F. Schlupp, J. Page, C. Djelal, and L. Libessart, "Use of biomass bottom ash as granular substitute in mortar", Journal of Building Engineering, vol. 75, pp. 106927, 2023.
[6] P. Velardo, I.F. S. D. Bosque, M.I. S. D. Rojas, N. D. Belie, and C. Medina, "Design and evaluation of physical, mechanical and micro-structural properties of eco-friendly binary-blended mortars using biomass bottom ash or construction and demolition waste powder", Cement and Concrete Composites, vol. 143, pp. 105252, 2023.
[7] V. Prabakaran and P. Ramadoss, "Evaluation of rheological and mechanical properties of bottom ash based masonry mortar with graphene oxide", Materials Today: Proceedings, (Accepted manuscript, In Press), 2023.
[8] D. Raghavendher, S. Kumar, and D. Singh, "Incinerator bottom ash as a supplementary material for green concrete and mortar", Materials Today: Proceedings, vol. 93, pp. 189–195, 2023.
[9] P. Markpiban, W. Krudam, and R. Sahamitmongkol, "Investigation of flow, compressive strength, shrinkage, and tensile properties of mortar with internal curing bottom ash", Results in Materials, vol. 15, pp. 100296, 2022.
[10] Portland cement, Ministry of Science and Technology, Vietnam, TCVN 2682:2020, 2020. (In Vietnamese).
[11] Ground granulated blast-furnace slag for concrete and mortar, Ministry of Science and Technology, Vietnam, TCVN 11586:2016, 2016. (In Vietnamese).
[12] Chemical admixtures for concrete, Ministry of Science and Technology, Vietnam, TCVN 8826:2024, 2024. (In Vietnamese).
[13] Water for concrete and mortar - Technical specification, Ministry of Science and Technology, Vietnam, TCVN 4506:2012, 2012. (In Vietnamese).
[14] Mortar for masonry - Test methods - Part 2: Sampling and preparation of sample, Ministry of Science and Technology, Vietnam, TCVN 3121-2:2022, 2022. (In Vietnamese).
[15] Mortar for masonry - Test methods - Part 11: Determination of flexural and compressive strength of hardened, Ministry of Science and Technology, Vietnam, TCVN 3121-11:2022, 2022. (In Vietnamese).
[16] Normal concrete - Nondestructive methods - Assessment of concrete quality using ultrasonic pulse velocity, Ministry of Science and Technology, Vietnam, TCVN 9357:2012, 2012. (In Vietnamese).
[17] Cements - Test method for drying shrinkage of mortar, Ministry of Science and Technology, Vietnam, TCVN 8824:2011, 2011. (In Vietnamese).
[18] Mortar for masonry - Test methods - Part 18: Determination of water absorption of hardened mortars, Ministry of Science and Technology, Vietnam, TCVN 3121-18:2003, 2003. (In Vietnamese).
[19] Heavy concrete - Method for electrical indication of concrete’s ability to resist chloride ion penetration, Ministry of Science and Technology, Vietnam, TCVN 9337:2012, 2012. (In Vietnamese).
[20] H. Alanazi, J. Hu, and Y.-R. Kim, "Effect of slag, silica fume, and metakaolin on properties and performance of alkali-activated fly ash cured at ambient temperature", Construction and Building Materials, vol. 197, pp. 747–756, 2019.
[21] G. Fang, W.K. Ho, W. Tu, and M. Zhang, "Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature", Construction and Building Materials, vol. 172, pp. 476–487, 2018.
[22] I. Ismail et al., "Influence of fly ash on the water and chloride permeability of alkali-activated slag mortars and concretes", Construction and Building Materials, vol. 48, pp. 1187–1201, 2013.
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Oct 31, 2025
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Cách trích dẫn
Huynh, T.-P., S.-C. Le, T. H. M. Le, và V.-D. Nguyen. “Utilizing Coal Bottom Ash As a Fine Aggregate in Mortar: The Effectiveness of Pre-Treatment Methods”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 23, số p.h 10C, Tháng Mười 2025, tr 126-31, doi:10.31130/ud-jst.2025.23(10C).677E.
