Determinacion de Propiedades Termo-Fisicas durante la Hidratacion de Materiales Base Cemento Utilizando CEMHYD3D

Published

October 17, 2014

Author(s)

Emilio Hernandez-Bautista, Dale P. Bentz, Sadoth Sandoval-Torres, Prisciiano Cano Barrita

Abstract

Steam curing under atmospheric pressure is used routinely in the precast concrete industry because of the increase in compressive strength up to 70 % obtained in only one day. However, this process requires high-energy consumption to maintain a constant temperature around 70 C and saturated water vapor within the curing chamber. Due to the exothermic nature of the hydration reaction of cement, it is important to determine the distribution of temperature/humidity within precast elements to prevent micro-cracking caused by temperature or moisture gradients, and to prevent the possibility of delayed ettringite formation if the concrete temperature exceeds 70 C. Based on the particle size distribution and chemical composition of a Mexican cement CPO30RS, the CEMHYD3D program was used to simulate the chemical reactions of cement hydration to obtain the degree of hydration, specific heat, heat generation, chemical shrinkage, porosity, and digital images of formed microstructure. The simulation was complemented with experimental data of isothermal calorimetry. Comparison of the experimental and simulated heat generation show good agreement.

Proceedings Title

CIMA 2014

Conference Dates

October 22-24, 2014

Conference Location

Oaxaca, MX

Conference Title

2nd Congreso Internacional de la Red del Medio Ambiente

Pub Type

Conferences

Keywords

Isothermal calorimetry, particle size distribution, degree of hydration, hydration, microstructure.

Citation

Hernandez-Bautista, E. , Bentz, D. , Sandoval-Torres, S. and Cano Barrita, P. (2014), Determinacion de Propiedades Termo-Fisicas durante la Hidratacion de Materiales Base Cemento Utilizando CEMHYD3D, CIMA 2014, Oaxaca, MX (Accessed December 12, 2024)