Mineralogical, Physical and Chemical Characterization of Cementitious Materials Subjected to Accelerated Decalcification by an Electro-Chemical Method
Artikel i vetenskaplig tidskrift, 2014

To facilitate the service life predictions regarding durability of nuclear waste repositories acceleration methods enhancing the decalcification process are needed. In this study an electro-chemical migration method to accelerate leaching of calcium from cementitious specimens of sizes 50×100Ø and 75×50Ø mm is presented. The mineralogical, physical and chemical properties of degraded samples are characterized. The results demonstrate that up to 70% decrease in strength, 50 % decrease in E-modulus, 90 % increase in gas permeability, at least 70% increase in chloride diffusion coefficient and 70 % increase in pore volume could be expected due to leaching of portlandite from concrete.

Mineralogical properties

Mechanical Properties

Acceleration method

Permeability

Diffusion

Service life

Calcium leaching

Adsorption

Författare

Arezou Babaahmadi

Chalmers, Bygg- och miljöteknik

Luping Tang

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Zareen Abbas

Chalmers, Kemi- och bioteknik

Nordic Concrete Research

0800-6377 (ISSN)

Vol. 1/2014 49 181-198

Ämneskategorier

Materialteknik

Samhällsbyggnadsteknik

Styrkeområden

Building Futures

Materialvetenskap

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2017-10-07