Influence of mix proportions on microstructure and gas permeability of cement pastes and mortars

This paper presents a study on the influence of mix proportions of cementitious materials on their transfer properties, namely porosity and gas permeability. These latter are known as durability indicators. The work is performed on a wide range of cement pastes and mortars (24 compositions). These c...

Full description

Saved in:
Bibliographic Details
Published in:Cement and concrete research 2012-02, Vol.42 (2), p.490-498
Main Authors: Hamami, A.A., Turcry, Ph, Aït-Mokhtar, A.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Civil Engineering
Concretes. Mortars. Grouts
Construction durable
Durability
Durability (C)
Eco-conception
Engineering Sciences
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
Indicators
Limestone filler
Materials
Matériaux composites et construction
Microstructure
Microstructure (B)
Mixture proportions (A)
Mortars
Pastes
Permeability
Permeability (C)
Porosity
Properties and test methods
Properties of anhydrous and hydrated cement, test methods
Structures
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a study on the influence of mix proportions of cementitious materials on their transfer properties, namely porosity and gas permeability. These latter are known as durability indicators. The work is performed on a wide range of cement pastes and mortars (24 compositions). These compositions are defined by mix proportion parameters (water/cement ratio, limestone filler/cement ratio, and amount of superplasticizer and volume fraction of paste). To characterize these materials, an experimental campaign was carried out, including different types of test (water porosimetry, mercury intrusion porosimetry, desorption isotherms and gas permeability). The influence of the composition parameters on the studied durability indicators is highlighted and correlation between gas permeability and microstructural properties (total porosity and critical pore diameter) is established. Finally, a method to predict materials permeability from that of the cement paste is proposed.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2011.11.019