Details

Autor(en) / Beteiligte

• ISHIKAWA, Rena
• NAWA, Toyoharu
• SAGAWA, Takahiro

Titel

A STUDY ON VALIDATION OF COMBINED METHOD OF CRYSTALLIZATION BY HEAT TREATMENT AND QUANTITATIVE XRD-REITVELD METHOD FOR DETERMINING HYDRATION DEGREE OF BLAST-FURNACE-SLAG IN SLAG-BLENDED CEMENT

Ist Teil von

• Cement Science and Concrete Technology, 2016/03/31, Vol.69(1), pp.76-81

Ort / Verlag

Japan Cement Association

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Slag-blended cement has chemical disadvantages needed to be overcome when used in various materials. Some of the disadvantages are due to difficulty in precisely understanding the hydration degree of BFS in slag-blended cement. Assessment of the hydration degree could provide deep understanding of properties of slag-blended cement. This study investigates the method which was suggested by Sagawa et al., to measure hydration degree of Blast-furnace slag（BFS）in slag-blended cement. They invented the method by combining crystallization by heat treatment and quantitative XRD-Reitveld method. According to their study, unreacted BFS can be crystallized by heat treatment, and determined quantitatively by XRD-Rietveld analysis using external standard method. However, because the method still needs more validation before it is routinely used, it should be compared to a different method. In this study, spiking method was used. Spiking method is also known as standard addition method, in which different amount of unreacted BFS is added in each division of slag-blended cement sample. From the results in this study, hydration degree of slag determined by spiking method was found to be similar to the one by the previous method. Therefore, the method established by Sagawa et al., has been proven to be useful to determine hydration degree of BFS.