Development of high volume rice husk ash alumino silicate composites |
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| Authors: | Ubolluk Rattanasak Prinya Chindaprasirt and Prasert Suwanvitaya |
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| Affiliation: | (1) Department of Civil Engineering, Thapar University, Patiala, 147004, India;(2) Structural Engineering, Center of Excellence for Concrete Research and Testing College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia |
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| Abstract: | The development of high volume rice husk ash (RHA) alumino silicate composites (ASC) was studied. RHA was used as the source
of silica and aluminium in the ASC. The mass ratios of RHA:Al(OH)3 of 70:30 to 99:1 were tested. The results indicate that the obtained ASC mortars are not stable and disintegrate in water.
Boric acid was introduced to the mixture to overcome this problem. Stable ASC mortars with high RHA:Al(OH)3 mass ratios of 90:10 to 97.5:2.5 were obtained with the use of boric acid and 115°C curing. The compressive strength of the
mortar of 20 MPa was gained. The immersion test indicates that high volume RHA ASC mortars show good resistance in 3vol% H2SO4 solution, but is slightly less durable in 5wt% MgSO4 solution. |
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