Moisture and ion transport properties in blended pastes and their relation to the refined pore structure
Artikel i vetenskaplig tidskrift, 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

Författare

Liming Huang

Tongji University

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Luping Tang

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Ingemar Löfgren

Thomas Concrete Group

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Nilla Olsson

NCC AB

Zhenghong Yang

Tongji University

Yongqiang Li

Shenzhen University

Cement and Concrete Research

0008-8846 (ISSN)

Vol. 161 106949 106949

Vatten i "gröna" cementmaterial

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

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

Svenska Byggbranschens Utvecklingsfond (SBUF), 2019-01-01 -- 2022-04-30.

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

Drivkrafter

Hållbar utveckling

Ämneskategorier

Byggproduktion

Annan materialteknik

Teoretisk kemi

Styrkeområden

Materialvetenskap

DOI

10.1016/j.cemconres.2022.106949

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Senast uppdaterat

2022-08-29