Fluid Transport in High-Volume Fly Ash Mixtures with and without Internal Curing

Published

October 7, 2013

Author(s)

Igor de la Varga, Robert Spragg, Carmelo di Bella, Javier Castro, Dale P. Bentz, Jason Weiss

Abstract

The transport of fluid and ions in concrete mixtures is central to many aspects of concrete deterioration. As a result, transport properties are frequently measured as an indication of the durability that a concrete mixture may be expected to have. This paper is the second in a series investigating the performance of High Volume Fly Ash (HVFA) mixtures with low water-to-cementitious ratios (w/cm) that are internally cured. While the first paper focused on strength and shrinkage, this paper presents the evaluation of the transport properties of these mixtures. Specifically, the paper presents results from: Rapid Chloride Migration (RCM), Rapid Chloride Penetration Test (RCPT), apparent chloride diffusion coefficient, surface electrical resistivity, and water absorption. The test matrix consisted of mortar samples with two levels of fly ash replacement (40 % and 60 % by volume) with and without internal curing provided with pre-wetted lightweight fine aggregates (LWA). These mixtures are compared to plain ordinary portland cement (OPC) mortars. The results indicate that internal curing provides benefits in terms of reduced transport coefficients.

Citation

Cement and Concrete Composites

Volume

45

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.cemconcomp.2013.09.017

Local Download

Keywords

Diffusion, high-volume fly ash, internal curing, resistivity, sorptivity, transport.

Citation

de la Varga, I. , Spragg, R. , di Bella, C. , Castro, J. , Bentz, D. and Weiss, J. (2013), Fluid Transport in High-Volume Fly Ash Mixtures with and without Internal Curing, Cement and Concrete Composites, [online], https://doi.org/10.1016/j.cemconcomp.2013.09.017, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=913751 (Accessed October 5, 2024)