Ascertaining the Optimal Combustion Temperature and Duration of Rice Husk Ash as a Supplementary Cementitious Material: A Literature Survey

Abstract

The study establishes the combustion temperature and duration that optimize the chemical composition of rice husk ash as a supplementary cementitious material through a literature inquiry. Concentration of SO3, (SiO2 + Al2O3 + Fe2O3), and CaO in rice husk ash (RHA), in accordance with ASTM C618-2019 classification for fly ash, aided in achieving the study's aim. The combustion temperature and duration in existing studies that satisfied the requirements of SO3, CaO, and recorded the maximum (SiO2 +Al2O3 + Fe2O3) score, were recommended as the optimal combustion temperature and duration of RHA. Sources of data included conference and journal articles which clearly stated the combustion temperature and/or duration, and were not older than 9 years. The optimal combustion temperature was 600 °C for a duration of 6 hours. The corresponding CaO (3.85) did not exceed 18.00%, SO3 (0.00) did not exceed 5%, and (SiO2 + Al2O3 + Fe2O3) was 95.47%, exceeding the minimum required of 50%. This study has established the optimal combustion temperature and duration of RHA as a supplementary cementitious material, which hitherto was largely missing in existing literature. Practically, it serves as a reference guide to academics and construction practitioners as to the combustion temperature and duration that optimize the chemical composition of RHA. It promotes rice husk waste valorisation and addresses Sustainable Development Goal 13, Climate Action.

Keywords: Cement, Climate, Chemical, Sustainability, And Temperature

DOI: 10.54941/ahfe1007908