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A platform for research: civil engineering, architecture and urbanism
Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks
Highlights A combination of fly ash and residual rice husk ash is used as binder material. Unground rice husk ash is added to the brick mixture as fine aggregate substitution. Densified mixture design algorithm is applied to design a ratio of brick ingredients. Compressive strength of the bricks ranged from 20.9 to 31.5MPa. Using URHA reduces brick weight, environmental impact, and production cost of bricks.
Abstract Using solid waste materials in the production of construction materials has received considerable attention across the world. The present study investigates the feasibility of using the densified mixture design algorithm (DMDA) method to incorporate unground rice husk ash (URHA) as a partial fine aggregate replacement (0–40%) in the production of eco-friendly construction bricks. Fly ash (FA) and residual rice husk ash (RHA) are the main binder materials considered in this study. Solid bricks of 220×105×60mm in size were prepared in accordance with official Vietnamese product standards in steel molds under 35MPa forming pressure. After casting, the brick samples were stored at 35°C and a relative humidity of 50% until the ages required for testing. The brick samples were checked for dimensions and visible defects. The effects of URHA content on the engineering properties of the solid bricks, including compressive strength, flexural strength, water absorption, bulk density, and void volume, were also investigated. The test results showed that all brick samples exhibited good physical and mechanical properties. Compressive strength and flexural strength ranged, respectively, between 20.9–31.5MPa and 5.7–6.7MPa. All of these values were significantly better than the values required by the official Vietnamese standards. The results of this study demonstrate a significant potential for applying URHA in the production of eco-friendly construction bricks.
Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks
Highlights A combination of fly ash and residual rice husk ash is used as binder material. Unground rice husk ash is added to the brick mixture as fine aggregate substitution. Densified mixture design algorithm is applied to design a ratio of brick ingredients. Compressive strength of the bricks ranged from 20.9 to 31.5MPa. Using URHA reduces brick weight, environmental impact, and production cost of bricks.
Abstract Using solid waste materials in the production of construction materials has received considerable attention across the world. The present study investigates the feasibility of using the densified mixture design algorithm (DMDA) method to incorporate unground rice husk ash (URHA) as a partial fine aggregate replacement (0–40%) in the production of eco-friendly construction bricks. Fly ash (FA) and residual rice husk ash (RHA) are the main binder materials considered in this study. Solid bricks of 220×105×60mm in size were prepared in accordance with official Vietnamese product standards in steel molds under 35MPa forming pressure. After casting, the brick samples were stored at 35°C and a relative humidity of 50% until the ages required for testing. The brick samples were checked for dimensions and visible defects. The effects of URHA content on the engineering properties of the solid bricks, including compressive strength, flexural strength, water absorption, bulk density, and void volume, were also investigated. The test results showed that all brick samples exhibited good physical and mechanical properties. Compressive strength and flexural strength ranged, respectively, between 20.9–31.5MPa and 5.7–6.7MPa. All of these values were significantly better than the values required by the official Vietnamese standards. The results of this study demonstrate a significant potential for applying URHA in the production of eco-friendly construction bricks.
Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks
Hwang, Chao-Lung (author) / Huynh, Trong-Phuoc (author)
Construction and Building Materials ; 93 ; 335-341
2015-04-09
7 pages
Article (Journal)
Electronic Resource
English
Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks
| Online Contents | 2015
Properties of bricks incorporating unground rice husks
| Elsevier | 1982