@inproceedings{7c0d15d9079144769096b85ac4e7111a,
title = "Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation",
abstract = "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. ",
keywords = "gypsum, reclaimed asphalt filler, quarry waste duct, GGBS, hydraulically bound mixtures, pavement",
author = "{Bai Kamara}, {Kande Bure} and Esmaiel Ganjian and Morteza Khorami",
year = "2019",
month = jul,
day = "15",
language = "English",
isbn = "978-1079110265",
volume = "2",
publisher = "International Committee of the SCMT conferences",
pages = "318--328",
editor = "Ganjian, {Eshmaiel } and Claisse, {Peter } and Limbachiya, {Mukesh } and Bagheri, {Mohammadreza }",
booktitle = "Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5)",
address = "United Kingdom",
}