Pozzolanic biosilica, biochar, and egg shell in setting time, WVTR, and compression strength of biocement mortar: a Taguchi GRA validation

Autor: S. M. Mohamed Sahibulla, S. Julyes Jaisingh
Rok vydání: 2021
Předmět:
Zdroj: Biomass Conversion and Biorefinery.
ISSN: 2190-6823
2190-6815
Popis: This present research deals with the optimization study of biocement mortar made of biosilica, biochar, and egg shell waste powder to reduce the cement content up to 35 wt.%. The main purpose of this present study was to optimize the pozzolanic contents such as biosilica, biochar, and calcite egg shell particle in the setting time and water vapour transmission rate (WVTR) and compression strength of biocement mortar and how these bio-wastes turn to valuable material. The biocement mortar cubs were prepared using the Taguchi L9 design pattern and analysed followed by grey relational approach. The biosilica particle used here was extracted from rice husk ash followed by thermo-chemical method. Similarly, the porous biochar was prepared from rice straw followed by low-temperature pyrolysis. The egg shell waste powder was prepared via high-energy ball mill for about 4 h followed by sieving process to confirm the uniform particle size equal to 1 µm. The compression strength, WVTR, and final setting time were measured after the successful ageing of cement cubes for about 28 days. According to analysis, the experimental plan A3B1C3 gives overall best rank among other experimental patterns with the GRG of 0.705. Moreover, the weight percentage of biochar directly influences the overall performance of cement mortar cubes rather than biosilica and egg shell particles. The confirmation study revealed improvement in grey relational grade of 1.72%, which is equal to the high compression strength of 55.101 MPa, lower WVTR of 1.6E−6 kg/m2s at 28 °C, and lower final setting time of 521 min.
Databáze: OpenAIRE
Externí odkaz: