Effect of Microwave Curing to the Compressive Strength of Fly Ash Based Geopolymer Mortar

Abstract:

With the advancement of technology and the economic crisis in Malaysia, has been promoting the development of infrastructure in the use of new structural materials but overall is unsatisfactory in terms of cost savings. One of the alternatives that can be used is to use fly ash as a cement replacement in manufacturing mortar. Replacement of cement with geopolymerization mortar can reduce manufacturing costs and could reduce global warming arising from the production of cement for the production of Portland cement for the release of CO₂ into the atmosphere, where CO₂ gas gives the largest contribution to global warming . The study will be focused on the effect of microwave curing with various durations and temperature to the mechanical and physical properties of fly ash based geopolymer mortar. For the conventional heating technique, heat is distributed in the specimen from the exterior to the interior leading to the non-uniform and long heating period to attain the required temperature. Application of microwave to the fresh concrete results in removal of water, collapse of capillary pore and densification of sample. Heat curing has been applied to construction materials especially for the precast concrete to improve the strength development process. This concrete attains sufficient strength in short curing time, so the molds can be reused, and the final products can be rapidly delivered to the site. The effect of curing temperature together with their aging days of the cured product will also be investigated. Mechanical properties of the product will be tested using compressive test, and density of the samples.

• Periodical: Materials Science Forum (Volume 841)
• Pages: 193-199
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.841.193
• Online since: January 2016
• Authors: Mohd Mustafa Al Bakri Abdullah*, Muhammad Faheem Mohd Tahir, Kamarudin Hussin, Mohammed Binhussain, Januarti Jaya Ekaputri
• Keywords: Curing Time Microwave Curing, Fly Ash, Geopolymer Mortar, Oven Curing

References

[1] M. I. Jaaffar, W. H. W. Badaruzzaman, M. M. Al Bakri Abdullah et al. Relationship between panel stiffness and mid-span deflection in Profiled steel sheeting dry board with geopolymer concrete infill. Materiale Plastice, (2015).

DOI: 10.4028/www.scientific.net/amm.754-755.354

[2] Abdullah, Mohd Mustafa Al Bakri, Liyana Jamaludin et al. Fly Ash Porous Material using Geopolymerization Process for High Temperature Exposure, International Journal of Molecular Sciences, (2012).

DOI: 10.3390/ijms13044388

[3] M. M. Al Bakri Abdullah et al. Fly ash based lightweight geopolymer concrete using foaming agent technology. Revista de Chimie, Volume 66, Issue 7, 1 July 2015, Pages 1001-1003.

DOI: 10.4028/www.scientific.net/amm.679.20

[4] W. M. Wan Ibrahim, K. Hussin, M.M. Al Bakri Abdullah, A. Abdul Kadir and M. Binhussain. Development of Fly Ash-Based Geopolymer Lightweight Bricks Using Foaming Agent – A Review, Key Engineering Materials, (2015).

DOI: 10.4028/www.scientific.net/kem.660.9

[5] Mastura, W.I. Wan; kamarudin, H.; Nizar,I. Khairul; Al Bakri A.M. Mustafa and BnHussain,M. Effect of curing System on Properties of Fly Ash-Based Geopolymer Brick , International Review of Mechanical Engineering, (2013).

DOI: 10.4028/www.scientific.net/amr.626.937

[6] Jumrat,S. Dielectric properties and temperature profile of fly ash-based geopolymer mortar, International Communicstions in Heat and Mass Transfer, 201102.

DOI: 10.1016/j.icheatmasstransfer.2010.11.020

[7] C. Y Heah, A.M. Mustafa Al Bakri et al. Study on solids-to-liquid and alkaline activator ratios on kaolin-based geopolymers. Construction and Building Materials 35(2012): 912-922.

DOI: 10.1016/j.conbuildmat.2012.04.102

[8] Rangan, B. V. Low-Calcium, Fly-Ash-Based Geopolymer Concrete., Concrete Construction Engineering Handbook. Taylor and Francis Group, Boca Raton, FL, (2008).

DOI: 10.1201/9781420007657.ch26

[9] A. M. Izzat, A. M. M. Al Bakri et al. Sulfuric acid attack on ordinary Portland cement and geopolymer material, Revista de Chimie, Volume 64, Issue 9, September 2013, Pages 1011-1014.

[10] Y. M. Liew, H. Kamarudin et al. Processing and characterization of calcined kaolin cement powder, Construction and Building Materials, Volume 30, May 2012, Pages 794-802.

DOI: 10.1016/j.conbuildmat.2011.12.079