The effect of gyrolite additive on the hydration properties of Portland cement

Journal Article · Sun Jan 15 04:00:00 EST 2012 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2011.07.003· OSTI ID:21596948

Eisinas, A; Baltakys, K; Siauciunas, R

The influence of gyrolite additive on the hydration properties of ordinary Portland cement was examined. It was found that the additive of synthetic gyrolite accelerates the early stage of hydration of OPC. This compound binds alkaline ions and serves as a nucleation site for the formation of hydration products (stage I). Later on, the crystal lattice of gyrolite becomes unstable and turns into C-S-H, with higher basicity (C/S {approx} 0.8). This recrystallization process is associated with the consumption of energy (the heat of reaction) and with a decrease in the rate of heat evolution of the second exothermic reaction (stage II). The experimental data and theoretical hypothesis were also confirmed by thermodynamic and the apparent kinetic parameters of the reaction rate of C{sub 3}S hydration calculations. The changes occur in the early stage of hydration of OPC samples and do not have a significant effect on the properties of cement stone.

• OSTI ID: 21596948
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 1 Vol. 42; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADDITIVES
BUILDING MATERIALS
CALORIMETRY
CEMENTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ENERGY
ENTHALPY
HEAT
HYDRATION
HYPOTHESIS
KINETICS
MATERIALS
NUCLEATION
PHYSICAL PROPERTIES
PORTLAND CEMENT
REACTION HEAT
REACTION KINETICS
RECRYSTALLIZATION
SOLVATION
THERMODYNAMIC PROPERTIES