This research was undertaken to close the knowledge gap in factory gypsum wastes. Tests were prepared on industrial by-products to determine suitability. Phase one tests revealed binary and ternary mixtures of gypsum wastes greater than 40% showed reduced strength at 7, 28 and 90 days. Mixture with the proportions of 15%V-B5G (Vitamin B5 Gypsum), 37.5%RAF (Reclaimed Asphalt Filler) and 47.5%GGBS attained the highest compressive strength of approximately 30MPa at 28 days. One of the dominant factors that influenced the strength of SYSTEM 2 and 2A was the presence of calcium sulphate - CaSO4 (CaO + SO3) in the PG / V-B5G materials, calcium silicate – CaSiO3 (CaO + SiO2) in the GGBS and the pozzolanic activity (SiO2 + Fe2O3 + Al2O3) in the RAF. The results suggest there are mixtures in all the SYSTEMS that are suitable for use as road (base) and foundation materials.
|Title of host publication||Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5)|
|Editors||Eshmaiel Ganjian, Peter Claisse, Mukesh Limbachiya, Mohammadreza Bagheri|
|Publisher||International Committee of the SCMT conferences|
|Number of pages||11|
|Publication status||Published - 15 Jul 2019|
- reclaimed asphalt filler
- quarry waste duct
- hydraulically bound mixtures
Bai Kamara, K. B., Ganjian, E., & Khorami, M. (2019). Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation. In E. Ganjian, P. Claisse, M. Limbachiya, & M. Bagheri (Eds.), Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5) (Vol. 2, pp. 318-328). International Committee of the SCMT conferences.