EPA: LAG No. DW-13-93903501-0 Expanding a Tool for Predicting Chloride Diffusivity in Concrete So It Can Be Used by Manufacturers to Evaluate the Durability of Concrete Made With Blended Cements. Part I: Characterizing Blended Cement Materials. Final Report
EPA: LAG No. DW-13-93903501-0 Expanding a Tool for
Predicting Chloride Diffusivity in Concrete So It Can Be
Used by Manufacturers to Evaluate the Durability of
Concrete Made With Blended Cements. Part I:
Characterizing Blended Cement Materials. Final Report
(1028 K)
Feng, X.; Garboczi, E. J.; Bullard, J. W.; Bentz, D. P.;
Snyder, K. A.; Stutzman, P. E.; Mason, T. O.
NISTIR 7135; 37 p. August 2004.
Keywords:
concretes; cements; chloride diffusion; diffusivity; fly
ash; blended cements
Abstract:
This report summarizes a project that dealt with the
characterization of a fly ash and fly-ash blended cement
material, so that these could be incorporated into the
Virtual Cement and Concrete Testing Laboratory (VCCTL)
software. The information generated from this project
will be transferred to the members of the consortium,
who represent all parts of the concrete materials
community cement production, chemical admixtures,
aggregates, and ready-mixed concrete manufacture.
Eventually, all the VCCTL software will be publicly
accessible, but since new features developed by the
consortium are not released to the public for three
years, joining the VCCTL consortium will allow quicker
access to the software. Products of this partially
EPA-funded project include: a method for predicting the
conductivity of pore solutions where the concentration
of [Na]+ and [K]+ ions are known, unique experimental
data on the hydration of cement and the consumption of
fly ash in a fly ash blended cement, experimental data
on the electrical conductivity of blended cement pastes
made from these materials, and model modifications that
allow for more quantitative modeling of blended cement
hydration and microstructure formation. This project has
turned out products that will allow much greater
progress in the future in the area of modeling blended
cements.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899