Pre-Dry Mixing Process of Low Carbon Alkaline-Activated Cement: Properties and Advantages in Practical Work of Construction

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Abstract:

Climate change due to carbon dioxide (CO2) emission is a serious concern in modern society. Cement manufacturing industry world-wide currently contributes approximately 8 % of global CO2 emissions, and this is a serious obstacle for the sustainable development of the cement manufacturing industry. Alkaline-activated cement (AAC) has been proven to be one of alternative cementitious materials which has less disturbance to the environment and can be used as construction materials. However, typical alkaline-activated cement is generally manufactured by mixing raw material with alkaline solutions. It was found that the preparation process of solutions and transportation to construction sites could raise some difficulties in real use. To eliminate the use of the alkaline activator in liquid form and simplify the mixing processes, the development of Just-Adding-Water (JAW) technique was introduced in this research. The results revealed that the alkaline-activated cement manufactured using the pre-dry mix process achieved a 28-day compressive strength very similar to that of typical alkaline-solution mixture in non-oven curing condition. In the pre-dry mixing process, the amount of required water may be slightly higher than that of normal alkaline-solution mixture in order to compensate insufficient water in both mixes and moisture loss during exothermic reaction as well as maintain the workability.

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194-199

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October 2018

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[1] J.G.J. Olivier et al., Trends in global CO2 emissions: 2015 Report, PBL NEAA and ECJRC IES (2015).

Google Scholar

[2] P., Duxson et al.: Geopolymer technology: the current state of the art,, Journal of Materials Science, 42(9), p.2917–2933 (2007).

Google Scholar

[3] G., Kastiukas, X., Zhou and J., Castro-Gomes: Preparation Conditions for the Synthesis of Alkali-Activated Binders Using Tungsten Mining Waste. Journal of Materials in Civil Engineering, 29(10), p.04017181 (2017).

DOI: 10.1061/(asce)mt.1943-5533.0002029

Google Scholar

[4] S., Hanjitsuwan, T., Phoo-ngernkham, L.Y., Li, N., Damrongwiriyanupap and P., Chindaprasirt: Strength development and durability of alkali-activated fly ash mortar with calcium carbide residue as additive. Construction and Building Materials, 162, pp.714-723 (2018).

DOI: 10.1016/j.conbuildmat.2017.12.034

Google Scholar

[5] P., Duxson and J.L., Provis: Designing precursors for geopolymer cements. Journal of the American Ceramic Society, 91(12), 3864-3869 (2008).

DOI: 10.1111/j.1551-2916.2008.02787.x

Google Scholar

[6] D., Feng, J.L., Provis, J.L. and J.S.J., Van Deventer: Thermal Activation of Albite for the Synthesis of One-Part Mix Geopolymers. Journal of the American Ceramic Society, 95(2), 565–572 (2012).

DOI: 10.1111/j.1551-2916.2011.04925.x

Google Scholar

[7] X., Ke, S.A., Bernal, N., Ye, J.L., Provis and J., Yang: One‐Part Geopolymers Based on Thermally Treated Red Mud/NaOH Blends. Journal of the American Ceramic Society, 98(1), pp.5-11 (2015).

DOI: 10.1111/jace.13231

Google Scholar

[8] Y. M., Liew, H., Kamarudin, A.M., Al Bakri, M., Luqman, I.K., Nizar, C.M., Ruzaidi and C.Y., Heah: Processing and characterization of calcined kaolin cement powder. Construction and Building Materials, 30, 794-802 (2012).

DOI: 10.1016/j.conbuildmat.2011.12.079

Google Scholar

[9] T., Suwan and M., Fan: Effect of manufacturing process on the mechanisms and mechanical properties of fly ash-based geopolymer in ambient curing temperature. Materials and Manufacturing Processes, 32(5), pp.461-467 (2017).

DOI: 10.1080/10426914.2016.1198013

Google Scholar