Study of the strength characteristics of protein-based lightweight foamed concrete with cement partially replaced with Rice husk ash
| Autor: | Mohammed Abdullahi, EB Coker, J. I. Aguwa, S. Sadiku |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Cement
Materials science Aggregate (composite) 010102 general mathematics Foaming agent Pozzolan 01 natural sciences Husk law.invention Portland cement Compressive strength Volume (thermodynamics) law Compressive Strength Lightweight Foamed Concrete Ordinary Portland Cement Protein-based Foaming Agent Rice Husk Ash 0101 mathematics Composite material civil engineering engineering materials |
| Zdroj: | Nigerian Journal of Technology; Vol 35, No 4 (2016); 699-706 |
| ISSN: | 0331-8443 2467-8821 |
| Popis: | Compressive strength test was carried out on the protein-based lightweight foamed concrete produced with cement partially replaced by rice husk ash to ascertain its strength characteristics. Standard concrete cubes of 150 x 150 x 150 mm were produced using ordinary Portland cement (OPC), fine aggregate, aqueous protein-based foaming agent and rice husk ash (RHA). The RHA was used to replace cement at 5 %, 10 %, 15 %, 20 %, 25 %, 30 %, 35%, 40 %, 45 % and 50 % by weight of cement. Control cubes with no cement replacement (0 %), were also produced and used as reference points for comparing the compressive strength of the lightweight foamed concrete at 28 days and 56 days respectively. The mix proportion of 1:1.5 was used as binder/fine aggregate proportions with the foam occupying 20 % of the volume of the concrete and the other constituents occupying the remaining 80 %. The compressive strengths of the lightweight foamed concrete at both 28 days and 56 days, increased for cement replacement levels of 5 – 30 % and gradually decreased for cement replacement levels of 35 – 50 % respectively for the mix proportion of 1:1.5 and for the water/binder ratio of 0.4. The minimum 28 days compressive strength for the mix proportion of 1:1.5 at cement replacement level of 30 % and water/binder ratio of 0.4 was 15.52 N/mm 2 while that at 56 days was 18.51 N/mm 2 . The rice husk ash is a pozzolanic material with a capability of contributing up to 80 % and above to the compressive strength of lightweight foamed concrete, if the percentage replacement does not exceed 30 %. The mix proportion of 1:1.5 at water/binder ratio of 0.4 produces a structural lightweight concrete at 28 days. http://dx.doi.org/10.4314/njt.v35i4.2 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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