English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

It is accepted around the world that the addition of an appropriate amount of a supplementary cementitious material (SCM) such as fly ash or blast furnace slag effectively suppresses mortar expansion caused by the alkali-silica reaction (ASR). However, even after extensive research, the actual suppression mechanism has yet to be identified and remains a matter of controversy. Proposed mechanisms attribute the behavior to the hydration process and the phase composition of cement hydrates with SCMs present. The quantity and composition of the C-S-H gel are greatly affected by the type and amount of SCM. The addition of an appropriate amount of an SCM leads to the formation of C-S-H gel with a low Ca/Si ratio, resulting in lower concentrations of alkali and hydroxide ion in the pore solution, which is the most effective factor for ASR suppression. In order to evaluate the suppression effect of SCMs on ASR expansion, it is necessary to consider the hydration process of cement and SCMs as well as the properties of the cement hydrates. Phase composition analysis such as X-ray diffraction (XRD) or Rietveld analysis is being developed as a promising method for measuring the reaction of cement hydrates including SCMs[1]. The combination of Yuichiro KAWABATA (Port and Airport Research Institute)

RELATION OF PHASE COMPOSITION OF CEMENT HYDRATES WITH SUPPLEMENTARY CEMENTITIOUS MATERIALS TO THE SUPPRESSING EFFECT ON ASR EXPANSION