Title:
UR2: An Ultra-Rapid Reactivity Test for Real-Time Low-Cost Quality Control of Calcined Clays
Author(s):
Yujia Min
Publication:
Web Session
Volume:
ws_F24_YujiaMin.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
11/3/2024
Abstract:
Calcined clay is a sustainable supplementary cementitious material suited for meeting the growing demand of the cement industry and reducing its carbon footprint. However, there is a lack of real-time quality control technology for reactivity assessment during industrial production of calcined clay. This study investigated 47 calcined clay samples (natural and commercial), including kaolinite, montmorillonite, and illite-based clays, and developed a novel reactivity test called UR2. When compared to the pozzolanic reactivity measured by the R3 test (ASTM C1897), it was found that the results obtained within 5 min were correlated to the 7d cumulative heat release during R3 testing (R2=0.92). Thus, this UR2 method can enable real-time reactivity assessments on the production line and instantaneous adjustments of production conditions. Overall, our study presented a new reactivity test for calcined clays which can be performed within minutes. Our UR2 test can facilitate the deployment of calcined clay at commercial scale.