TY - JOUR
T1 - Improving the performance of reactive MgO cement-based concrete mixes
AU - Nguyen, Tien-Dung
AU - Cise, Unluer
PY - 2016/11/15
Y1 - 2016/11/15
N2 - Low hydration and high water demand of MgO limits strength gain in MgO cement-based formulations. This study enhanced the microstructure and performance of MgO concrete mixes by increasing hydration and lowering water demand via the introduction of hydration (HA) and dispersion (DA) agents. Hydration and carbonation mechanisms were evaluated by isothermal calorimetry, TGA, XRD, FTIR and SEM. HA increased MgO dissolution and brucite precipitation. DA reduced water content and resulted in denser microstructures by increasing CO2 diffusion. Formation of dense carbonate networks with improved morphologies resulted in 28-day strengths of 45 MPa, which were >50% higher than the control sample.
AB - Low hydration and high water demand of MgO limits strength gain in MgO cement-based formulations. This study enhanced the microstructure and performance of MgO concrete mixes by increasing hydration and lowering water demand via the introduction of hydration (HA) and dispersion (DA) agents. Hydration and carbonation mechanisms were evaluated by isothermal calorimetry, TGA, XRD, FTIR and SEM. HA increased MgO dissolution and brucite precipitation. DA reduced water content and resulted in denser microstructures by increasing CO2 diffusion. Formation of dense carbonate networks with improved morphologies resulted in 28-day strengths of 45 MPa, which were >50% higher than the control sample.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84988878452&partnerID=MN8TOARS
U2 - 10.1016/j.conbuildmat.2016.09.090
DO - 10.1016/j.conbuildmat.2016.09.090
M3 - Article
SN - 0950-0618
VL - 125
SP - 747
EP - 758
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -