Modelling of the sulfuric acid attack on different types of cementitious materials

Journal Article · Thu Mar 15 04:00:00 EDT 2018 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2018.01.014· OSTI ID:22806464

Grandclerc, Anaïs ^[1]; Dangla, Patrick ^[2]; Gueguen-Minerbe, Marielle; Chaussadent, Thierry ^[1]

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1. Université Paris-Est, MAST, CPDM, IFSTTAR, F-77447 Marne-la-Vallée (France)
2. Université Paris-Est, Laboratoire Navier (UMR 8205), CNRS, École des Ponts ParisTech, F-77455 Marne-La-Vallée (France)

A chemical-reactive transport model is used to simulate the sulfuric acid attack of cement pastes based on ordinary Portland cement (CEM I), blended Portland cements (CEM III, CEM IV, and CEM V), and calcium aluminate cement (CAC). This model accounts for the dissolution of cement hydrates (portlandite, C-S-H, hydrogarnet), and the precipitation of deterioration products (ettringite and gypsum). Moreover, diffusion of the aqueous species in the pore space of the material is considered. With this model, the hydrate contents, the porosity, and the deterioration phase contents throughout a sulfuric acid attack are determined. Two indicators are defined to predict the service life of the cementitious materials: the deterioration depth and the dissolved calcium content. These two indicators show that calcium aluminate cement has a better resistance to sulfuric acid attack than that of Portland cements. This better resistance is mainly due to the partial dissolution of CAC hydrate as opposed to the total dissolutions of CH and C-S-H.

• OSTI ID: 22806464
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 105; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
CALCIUM COMPOUNDS
DIFFUSION
DISSOLUTION
GYPSUM
HYDRATES
POROSITY
PORTLAND CEMENT
PRECIPITATION
SERVICE LIFE
SIMULATION
SULFURIC ACID
TRANSPORT THEORY