What is it about?
This study examined the reactivity of supplementary cementitious materials. Specifically the heat release and calcium hydroxide consumption were measured when supplementary cementitious materials were combined with calcium hydroxide at 50 °C in a solution with pH 13.5.
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Why is it important?
This paper examined the heat release and calcium hydroxide consumption were measured when supplementary cementitious materials were combined with calcium hydroxide at 50 °C in a solution with pH 13.5. By analyzing both calcium hydroxide consumption and the heat release new insights about the hydraulic and pozzolanic nature of different SCMs are obtained. The calcium hydroxide consumption in this test can be used to determine SCM reaction extents in cement pastes containing SCM.
Perspectives
This paper has potential impact on how various supplementary cements react and impact strength and transport properties. The work also has a strong impact on the use of SCM in concrete paving and flat work to reduce joint damage by reducing the calcium hydroxide in the concrete. This is a step in the process of a new mixture design procedure the research team is working on.
Professor William Jason Weiss
Oregon State University
Read the Original
This page is a summary of: Examining the pozzolanicity of supplementary cementitious materials using isothermal calorimetry and thermogravimetric analysis, Cement and Concrete Composites, October 2017, Elsevier,
DOI: 10.1016/j.cemconcomp.2017.07.009.
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