Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums

Shinya Inazumi, Hiroaki Sano, Mikio Yamada, Hsin Ming Shang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to utilize reclaimed gypsums (gypsum board waste) derived from waste plasterboards as geo-materials, thermal behaviors of the reclaimed gypsums and reagent gypsum are investigated in this paper. As a result, it was found that the dihydrate gypsum is changed into the hemihydrate gypsum under thermal condition of 90°C and the hemihydrate gypsum is changed into anhydrite under that of 120°C with heating of 24 hours. The followings are clarified in this paper: (1) The cement density measuring method was available in order to measure the density of reclaimed gypsums; (2) that density was dependent on the drying conditions of the reclaimed gypsums; and (3) the density measuring method was appropriate to estimate the gypsum hemihydrate content on reclaimed gypsums.

Original languageEnglish
Title of host publicationGeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages222-231
Number of pages10
Edition241 GSP
ISBN (Print)9780784413432
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event2014 GeoShanghai International Congress: GeoEnvironmental Engineering - Shanghai, China
Duration: 2014 May 262014 May 28

Other

Other2014 GeoShanghai International Congress: GeoEnvironmental Engineering
CountryChina
CityShanghai
Period14/5/2614/5/28

Fingerprint

Gypsum
gypsum
Availability
measuring method
anhydrite
Drying
Cements
cement
heating
Heating

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Building and Construction
  • Architecture

Cite this

Inazumi, S., Sano, H., Yamada, M., & Shang, H. M. (2014). Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums. In GeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress (241 GSP ed., pp. 222-231). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413432.023

Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums. / Inazumi, Shinya; Sano, Hiroaki; Yamada, Mikio; Shang, Hsin Ming.

GeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress. 241 GSP. ed. American Society of Civil Engineers (ASCE), 2014. p. 222-231.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inazumi, S, Sano, H, Yamada, M & Shang, HM 2014, Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums. in GeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress. 241 GSP edn, American Society of Civil Engineers (ASCE), pp. 222-231, 2014 GeoShanghai International Congress: GeoEnvironmental Engineering, Shanghai, China, 14/5/26. https://doi.org/10.1061/9780784413432.023
Inazumi S, Sano H, Yamada M, Shang HM. Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums. In GeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress. 241 GSP ed. American Society of Civil Engineers (ASCE). 2014. p. 222-231 https://doi.org/10.1061/9780784413432.023
Inazumi, Shinya ; Sano, Hiroaki ; Yamada, Mikio ; Shang, Hsin Ming. / Availability of density measuring methods estimating gypsum hemihydrate content in reclaimed gypsums. GeoEnvironmental Engineering - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress. 241 GSP. ed. American Society of Civil Engineers (ASCE), 2014. pp. 222-231
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