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TL Webb, JE Krüger (1970)
Differential thermal analysis, 1, fundamental aspects
M. Lǐska, A. Al-Tabbaa (2008)
Performance of magnesia cements in pressed masonry units with natural aggregates: Production parameters optimisationConstruction and Building Materials, 22
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Enhancing the carbonation of MgO cement porous blocks through improved curing conditionsCement and Concrete Research, 59
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Production of MgO-type expansive agent in dam concrete by use of industrial by-productsBuilding and Environment, 43
H. Phan, Kyung-Yup Hwang, Jun-young Ahn, T. Kim, Cheolyong Kim, I. Hwang (2017)
Investigation of the accelerated carbonation of a MgO-based binder used to treat contaminated sedimentEnvironmental Earth Sciences, 76
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The role of brucite, ground granulated blastfurnace slag, and magnesium silicates in the carbonation and performance of MgO cementsConstruction and Building Materials, 94
Kyung-Yup Hwang, Jeong-Yun Seo, H. Phan, Jun-young Ahn, I. Hwang (2014)
MgO‐Based Binder for Treating Contaminated Sediments: Characteristics of Metal Stabilization and Mineral CarbonationClean-soil Air Water, 42
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Performance of magnesia cements in porous blocks in acid and magnesium environmentsAdvances in Cement Research, 24
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Influence of mix design on the carbonation, mechanical properties and microstructure of reactive MgO cement-based concreteCement & Concrete Composites, 80
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The Influence of Aggregate Type on the Physico-Mechanical Properties of Magnesia Cement Pastes
D. Panesar, L. Mo (2013)
Properties of binary and ternary reactive MgO mortar blends subjected to CO2 curingCement & Concrete Composites, 38
L. Vandeperre, A. Al-Tabbaa (2007)
Accelerated carbonation of reactive MgO cementsAdvances in Cement Research, 19
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Cheng Chang, Jing Chen (2006)
The experimental investigation of concrete carbonation depthCement and Concrete Research, 36
We previously described a MgO-based binder for treating fine sediment and simultaneously store CO2. Here, we describe a study of the physical/mechanical characteristics and carbonation reactions of the MgO-based binder used to solidify/stabilize fine sediment in atmospheres containing different CO2 concentrations. Carbonation of the sediment treated with the MgO-based binder at the atmospheric CO2 concentration markedly improved the compressive strength of the product. The compressive strength was 4.78 MPa after 365 days of curing, 1.3 times higher than the compressive strength of sediment treated with portland cement. This improvement was caused by the formation of carbonation products, such as hydromagnesite, nesquehonite, and lansfordite, and the constant high pH (~ 12) of the specimen, which favored the growth of hydration products such as calcium silicate hydrates and portlandite. Very low compressive strengths were found when 50 and 100% CO2 atmospheres were used because of excessive formation of carbonation products, which occupied 78% of the specimen depth. Abundant carbonation products increased the specimen volume and decreased the pH to 10.2, slowing the growth of hydration products. The absence of brucite in specimens produced in a 100% CO2 atmosphere indicated that MgO carbonation is favored over hydration at high CO2 concentrations.
Environmental Science and Pollution Research – Springer Journals
Published: May 28, 2018
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