Moisture and ion transport properties in blended pastes and their relation to the refined pore structure
Journal article, 2022

This paper presents a study of the moisture transport properties in blended pastes measured by a new procedure and setup. The dependence of moisture transport coefficient on relative humidity (RH) is confirmed. The differences in the moisture dependency may be due to discrepancies in the critical RH for the percolation of liquid. Fly ash and slag increase the percentage of mesopores or “ink-bottle” pores with a mesoscale neck and they strongly reduce the pore connectivity in pastes. These effects cause the evident reduction in the moisture and chloride diffusivity. The additional replacement with limestone filler has little effect on the pore connectivity. The formation factor controls the moisture transport at the high RH interval, but the volume of small pores (middle capillary and mesopores) is the major determinant at a low RH interval. The relationship between water-binder ratio, pore structure and moisture transport or chloride migration coefficient is discussed.

DurabilityMoisture transportSupplementary cementitious materialsPore structureFormation factor

Author

Liming Huang

Tongji University

Chalmers, Architecture and Civil Engineering, Building Technology

Luping Tang

Chalmers, Architecture and Civil Engineering, Building Technology

Ingemar Löfgren

Thomas Concrete Group

Chalmers, Architecture and Civil Engineering, Structural Engineering

Nilla Olsson

NCC AB

Zhenghong Yang

Tongji University

Yongqiang Li

Shenzhen University

Cement and Concrete Research

0008-8846 (ISSN)

Vol. 161 106949 106949

Water in "Green" Cementitious Materials

Cementa (173015), 2020-11-02 -- 2022-04-30.

Development Fund of the Swedish Construction Industry (SBUF), 2019-01-01 -- 2022-04-30.

Formas (2018-01430), 2019-01-02 -- 2022-04-30.

Thomas Concrete Group, 2019-01-01 -- 2022-04-30.

Driving Forces

Sustainable development

Subject Categories

Construction Management

Other Materials Engineering

Theoretical Chemistry

Areas of Advance

Materials Science

DOI

10.1016/j.cemconres.2022.106949

More information

Latest update

8/29/2022