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Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass

Phosphogypsum (PG) is an industrial waste from fertilizer production which causes environmental problems. Hemihydrate phosphogypsum (HPG) can be derived from dehydration of PG by low temperature calcination (about 180 degrees C). The low mechanical strength and poor water resistance of HPG restrict...

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Main Authors:	Zhang, Longjian, Mo, Kim Hung, Yap, Soon Poh, Gencel, Osman, Ling, Tung-Chai
Format:	Article
Published:	Elsevier 2022
Subjects:	TA Engineering (General). Civil engineering (General) TH Building construction
Online Access:	http://eprints.um.edu.my/41435/
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spelling	my.um.eprints.414352023-09-22T06:47:07Z http://eprints.um.edu.my/41435/ Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass Zhang, Longjian Mo, Kim Hung Yap, Soon Poh Gencel, Osman Ling, Tung-Chai TA Engineering (General). Civil engineering (General) TH Building construction Phosphogypsum (PG) is an industrial waste from fertilizer production which causes environmental problems. Hemihydrate phosphogypsum (HPG) can be derived from dehydration of PG by low temperature calcination (about 180 degrees C). The low mechanical strength and poor water resistance of HPG restrict its application as building material. In view of this, various amount of ground granulated blast furnace slag (GGBS) (5-25%) and Portland cement (15%) were mixed with the HPG and compared with the corresponding mixtures with commercial hemihydrate building gypsum (HBG). Compared to HBG-based composite (HBGC), the HPG-based composite (HPGC) had higher compressive strength. Besides that, the inclusion of GGBS is beneficial and up to 25% can significantly improve the softening coefficient (by up to 89%) and compressive strength (by up to 205%) of the HPG-cement composite. Different types of fine aggregate, namely silica sand and recycled waste glass (RWG) were also added in the HPGC with the latter recording improved performances in mechanical strength, water resistance and drying shrinkage. In overall, HPGC containing RWG with lightweight bulk density (1849 kg/m3), low drying shrinkage (378 mu epsilon at 28 d), adequate strengths (42.6 MPa compressive strength and 7.67 MPa flexural strength) and good water resistance (softening coefficient of 0.98) were developed. Elsevier 2022-08 Article PeerReviewed Zhang, Longjian and Mo, Kim Hung and Yap, Soon Poh and Gencel, Osman and Ling, Tung-Chai (2022) Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass. Construction and Building Materials, 345. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2022.128232 <https://doi.org/10.1016/j.conbuildmat.2022.128232>. 10.1016/j.conbuildmat.2022.128232
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TA Engineering (General). Civil engineering (General) TH Building construction
spellingShingle	TA Engineering (General). Civil engineering (General) TH Building construction Zhang, Longjian Mo, Kim Hung Yap, Soon Poh Gencel, Osman Ling, Tung-Chai Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
description	Phosphogypsum (PG) is an industrial waste from fertilizer production which causes environmental problems. Hemihydrate phosphogypsum (HPG) can be derived from dehydration of PG by low temperature calcination (about 180 degrees C). The low mechanical strength and poor water resistance of HPG restrict its application as building material. In view of this, various amount of ground granulated blast furnace slag (GGBS) (5-25%) and Portland cement (15%) were mixed with the HPG and compared with the corresponding mixtures with commercial hemihydrate building gypsum (HBG). Compared to HBG-based composite (HBGC), the HPG-based composite (HPGC) had higher compressive strength. Besides that, the inclusion of GGBS is beneficial and up to 25% can significantly improve the softening coefficient (by up to 89%) and compressive strength (by up to 205%) of the HPG-cement composite. Different types of fine aggregate, namely silica sand and recycled waste glass (RWG) were also added in the HPGC with the latter recording improved performances in mechanical strength, water resistance and drying shrinkage. In overall, HPGC containing RWG with lightweight bulk density (1849 kg/m3), low drying shrinkage (378 mu epsilon at 28 d), adequate strengths (42.6 MPa compressive strength and 7.67 MPa flexural strength) and good water resistance (softening coefficient of 0.98) were developed.
format	Article
author	Zhang, Longjian Mo, Kim Hung Yap, Soon Poh Gencel, Osman Ling, Tung-Chai
author_facet	Zhang, Longjian Mo, Kim Hung Yap, Soon Poh Gencel, Osman Ling, Tung-Chai
author_sort	Zhang, Longjian
title	Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
title_short	Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
title_full	Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
title_fullStr	Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
title_full_unstemmed	Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
title_sort	mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass
publisher	Elsevier
publishDate	2022
url	http://eprints.um.edu.my/41435/
_version_	1778161672261730304
score	13.211869

Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass

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