Effect of Particle Size of Residual Rice-Husk Ash in Consumption of Ca(OH)2
Source abstract
Abstract
Some researchers suggest the use of residual rice-husk ash (RHA) finely divided as a mineral addition to cement, despite the reduced content of amorphous silica compared to RHA produced by controlled burning. This article presents an investigation of the pozzolanic activity of residual RHA A and residual RHA B, with high and low contents of amorphous silica, respectively, showing different particle size distributions. Scanning electron microscopy (SEM), Si29 magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy, and determination of amorphous silica through the rapid analytical method were used for the microstructural characterization of the RHA samples. The RHA B with low content of amorphous silica increases the consumption of calcium hydroxide when its particle size decreases.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Environmental and Civil Engineering Dept., Univ. of Brasília, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília/DF 70910-900, Brazil (corresponding author).
Environmental and Civil Engineering Dept., Univ. of Brasília, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília/DF 70910-900, Brazil.
School of Civil Engineering, Federal Univ. of Goiás, Praça Universitária s/n, Setor Universitário, Goiânia/Goiás 74605-22, Brazil.
Dept. of Technical Support and Control, Furnas Centrais Elétricas, Rodovia BR 153/Km 510, Vila São Pedro, Aparecida de Goiânia/Goiás 74001970, Brazil.
Institute of Chemistry, Univ. of Brasília, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília/DF 70904-970, Brazil.
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