Next Article in Journal
From Clay Minerals to Al2O3 Nanoparticles: Synthesis and Colloidal Stabilization for Optoelectronic Applications
Next Article in Special Issue
Mineralogical and Thermal Characterization of Kaolinitic Clays from Terra Alta (Catalonia, Spain)
Previous Article in Journal
Insights into the CaSO4–H2O System: A Raman-Spectroscopic Study
Previous Article in Special Issue
Geological Prospection of Placer Chromium Deposits in the Waropen Regency—Indonesia (New Guinea) Using the Method of Indicator Minerals
Open AccessArticle

Mineralogical Characterization of Dolomitic Aggregate Concrete: The Camarasa Dam (Catalonia, Spain)

Departament d’Enginyeria Electrònica, Escola d’Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya Barcelona Tech, Av. d’Eduard Maristany 16, E-08019 Barcelona, Spain
Departament d’Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya Barcelona Tech, Av. Bases de Manresa 61-63, 08242 Manresa, Barcelona, Spain
Departament de Mineralogia, Petrologia i Geologia Aplicada, Universitat de Barcelona, Carrer Martí i Franquès s/n, 08028 Barcelona, Spain
Author to whom correspondence should be addressed.
Minerals 2020, 10(2), 117;
Received: 31 December 2019 / Revised: 20 January 2020 / Accepted: 26 January 2020 / Published: 29 January 2020
(This article belongs to the Special Issue Industrial Minerals)
The Camarasa Dam was built in 1920 using dolomitic aggregate and Portland cement with two different compositions: type A (dolomite and Portland cement) and type B (dolomite and sand-cement). The sand cement was a finely powdered mixture of dolomite particles and clinker of Portland cement. The mineralogy of concrete was studied by optical microscopy, scanning electron microscopy, and x-ray powder diffraction. Reaction of dedolomitization occurred in the two types of concrete of the Camarasa Dam, as demonstrated by the occurrence of calcite, brucite, and/or absence of portlandite. In the type A concrete, calcite, brucite, and a serpentine-group mineral precipitated as a rim around the dolomite grains and in the paste. The rims, a product of the dedolomitization reaction, protected the surface of dolomite from the dissolution process. In type B concrete, in addition to dolomite and calcite, quartz and K-feldspar were present. Brucite occurred in lower amounts than in the type A concrete as fibrous crystals randomly distributed in the sand-cement paste. Although brucite content was higher in the type A concrete, type B showed more signs of loss of durability. This can be attributed to the further development of the alkali-silica reaction in this concrete type. View Full-Text
Keywords: dolomite; sand-cement; concrete; dedolomitization reaction dolomite; sand-cement; concrete; dedolomitization reaction
Show Figures

Figure 1

MDPI and ACS Style

Garcia, E.; Alfonso, P.; Tauler, E. Mineralogical Characterization of Dolomitic Aggregate Concrete: The Camarasa Dam (Catalonia, Spain). Minerals 2020, 10, 117.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop