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VOL. 10, ISSUE 1 (2026)
Evaluation of magnesia (MgO) content and its behavior in Portland cement
Authors
Pramod Kumar Gautam, H L Prajapati, Dinesh Kumar Mishra, Awanish Kumar Patel
Abstract
The presence of magnesia (MgO) in Portland
cement plays a significant role in determining the material’s performance,
durability, and long-term dimensional stability. This study evaluates the
content of MgO in Portland cement and investigates its behavior during
hydration and hardening processes. The research focuses on the influence of MgO
concentration on setting time, soundness, mechanical strength, and micro
structural development. Experimental analyses were conducted using chemical
characterization techniques to quantify MgO content, while physical and
mechanical tests were performed to assess its effects on cement properties.
Particular attention was given to the formation of periclase and its potential
delayed hydration to magnesium hydroxide (Mg(OH)₂), which may lead to expansion
and cracking if present in excessive amounts. Microstructure evaluation was
carried out to understand the distribution and reactivity of MgO phases within
the cement matrix. The results indicate that controlled MgO content within
standard specification limits contributes minimally to expansion and does not
adversely affect strength development. However, higher MgO levels may increase
the risk of unsoundness due to delayed expansion. This study highlights the
importance of proper characterization and regulation of MgO content to ensure
the durability and structural integrity of Portland cement-based materials.
Pages:43-46
How to cite this article:
Pramod Kumar Gautam, H L Prajapati, Dinesh Kumar Mishra, Awanish Kumar Patel "Evaluation of magnesia (MgO) content and its behavior in Portland cement". International Journal of Chemistry Studies, Vol 10, Issue 1, 2026, Pages 43-46
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