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Recycling rice straw ash to produce low thermal conductivity and moisture-resistant geopolymer adobe bricks.
Morsy, Mohamed I; Alakeel, Khaled A; Ahmed, Ahmed E; Abbas, Ahmed M; Omara, Abdelaziz I; Abdelsalam, Nader R; Emaish, Haitham H.
Afiliação
  • Morsy MI; Department of Agricultural & Biosystem Engineering, Faculty of Agriculture, Alexandria University, P.O. Box 21545, Alexandria, Egypt.
  • Alakeel KA; National Center of Agricultural Technology, Life Science & Environmental Research Institute, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.
  • Ahmed AE; Biology Department, College of Science, King Khalid University, 61413 Abha, Saudi Arabia.
  • Abbas AM; Department of Theriogenology, Faculty of Veterinary Medicine, South Valley University, 83523 Qena, Egypt.
  • Omara AI; Biology Department, College of Science, King Khalid University, 61413 Abha, Saudi Arabia.
  • Abdelsalam NR; Botany and Microbiology Department, Faculty of Science, South Valley University, 83523 Qena, Egypt.
  • Emaish HH; Department of Agricultural & Biosystem Engineering, Faculty of Agriculture, Alexandria University, P.O. Box 21545, Alexandria, Egypt.
Saudi J Biol Sci ; 29(5): 3759-3771, 2022 May.
Article em En | MEDLINE | ID: mdl-35844427
ABSTRACT
Rice straw ash (RSA) geopolymer adobe bricks were produced using the geopolymerization reaction among the RSA, soil, and alkaline activator at the Biosystem Engineering Department, Faculty of Agriculture, Alexandria University, Egypt, to optimize adobe brick advantages. The bulk density, water absorption, compressive strength, and thermal conductivity of the new composite were measured at RSA contents of 0%, 5%, 10%, and 20% and sodium hydroxide contents of 2.5%, 5%, 7.5%, and 10% after curing the composite for 28 days. Results indicated that increasing RSA from 0% to 20% increased the compressive strength and decreased the bulk density, water absorption, and thermal conductivity. Further, increasing sodium hydroxide from 2.5% to 10% increased the bulk density and compressive strength and decreased the water absorption. Significant effects of RSA and sodium hydroxide percentages and their interaction on all the studied characters were reported. The best conditions to minimize bulk density, water absorption, thermal conductivity, and optimize compressive strength of the composite were at 10% sodium hydroxide and 20% RSA. The minimum bulk density, water absorption, and thermal conductivity were 1.463 g/cm3, 8.3%, and 0.46 W/(m·K), respectively, while the maximum CS was 2.1 MPa after 28 days. Using RSA geopolymer adobe bricks on building interior walls is recommended to decrease bricks' thermal conductivity, water absorption, and weight.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article