Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation

Kande Bure Bai Kamara; Esmaiel Ganjian; Morteza Khorami

Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation

Kande Bure Bai Kamara
, Esmaiel Ganjian
, Morteza Khorami

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

2 Citations (Scopus)

144 Downloads (Pure)

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.

Original language	English
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
Pages	318-328
Number of pages	11
Volume	2
ISBN (Print)	978-1079110265
Publication status	Published - 15 Jul 2019

Publication series

Name
ISSN (Print)	2515-3048
ISSN (Electronic)	2515-3056

Keywords

gypsum
reclaimed asphalt filler
quarry waste duct
GGBS
hydraulically bound mixtures
pavement

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Post-PrintAccepted author manuscript, 999 KBLicence: Unspecified

Cite this

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.

Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation. / Bai Kamara, Kande Bure; Ganjian, Esmaiel; Khorami, Morteza.
Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5). ed. / Eshmaiel Ganjian; Peter Claisse; Mukesh Limbachiya; Mohammadreza Bagheri. Vol. 2 International Committee of the SCMT conferences, 2019. p. 318-328.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

Bai Kamara, Kande Bure ; Ganjian, Esmaiel ; Khorami, Morteza. / Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation. Fifth International Conference on Sustainable Construction Materials and Technologies (SCMT5). editor / Eshmaiel Ganjian ; Peter Claisse ; Mukesh Limbachiya ; Mohammadreza Bagheri. Vol. 2 International Committee of the SCMT conferences, 2019. pp. 318-328

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N2 - 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.

AB - 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.

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KW - quarry waste duct

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KW - hydraulically bound mixtures

KW - pavement

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A2 - Bagheri, Mohammadreza

PB - International Committee of the SCMT conferences

ER -

Optimisation of secondary waste gypsum for mechanical stability in road (base) and foundation

Abstract

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Keywords

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