ScholarLens Back to search
2002•Guisuanyan xuebaoRequires access

EFFECTS OF CALCINED GYPSUM ON EARLY HYDRATION OF PORTLAND CEMENT

Hou Guihua

Open publisher page 2 citations

Abstract

Effects of gypsum and calcined gypsum on the early hydration of portland cement were investigated by means of DTA, XRD, IR, and chemically combined water and Ca(OH)2 content. Results show that the cement pastes with calcined gypsum had more Ca(OH)2, less chemically combined water and no ettringite in the first day of hydration in comparison with the cement pastes with gypsum. The research indicates that calcined gypsum instead of gypsum accelerated the formation of early hydration products because the aluminate containing phases in clinker can not hydrate to form ettringite during the first day due to the low dissolution rate of calcined gypsum.

About this research paper

What this paper is about

Effects of gypsum and calcined gypsum on the early hydration of portland cement were investigated by means of DTA, XRD, IR, and chemically combined water and Ca(OH)2 content. Results show that the cement pastes with calcined gypsum had more Ca(OH)2, less chemically combined water and no ettringite in the first day of hydration in comparison with the cement pastes with gypsum. The research indicates that calcined gypsum instead of gypsum accelerated the formation of early hydration products because the aluminate containing phases in clinker can not hydrate to form ettringite during the first day due to the low dissolution rate of calcined gypsum.

Why it matters

OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Effects of gypsum and calcined gypsum on the early hydration of portland cement were investigated by means of DTA, XRD, IR, and chemically combined water and Ca(OH)2 content. Results show that the cement pastes with calcined gypsum had more Ca(OH)2, less chemically combined water and no ettringite in the first day of hydration in comparison with the cement pastes with gypsum. The research indicates that calcined gypsum instead of gypsum accelerated the formation of early hydration products because the aluminate containing phases in clinker can not hydrate to form ettringite during the first day due to the low dissolution rate of calcined gypsum.

Key concepts: Gypsum, Ettringite, Calcination, Portland cement, Clinker (cement), Materials science, Cement, Aluminate

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
EFFECTS OF CALCINED GYPSUM ON EARLY HYDRATION OF PORTLAND CEMENT — Research Paper | ScholarLens