Evaluation of external sulfate attack (Na2SO4 and MgSO4): Portland cement mortars containing fillers
Author(s): |
D. J. De Souza
M. H. F. Medeiros J. Hoppe Filho |
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Medium: | journal article |
Language(s): | English |
Published in: | Revista IBRACON de Estruturas e Materiais, June 2020, n. 3, v. 13 |
Page(s): | 644-655 |
DOI: | 10.1590/s1983-41952020000300013 |
Abstract: |
Sulfate attack is a term used to describe a series of chemical reactions between sulfate ions and hydrated compounds of the hardened cement paste. The present study aims to evaluate the physical (linear expansion, flexural and compressive strength) and mineralogical properties (X-ray diffraction) of three different mortar compositions (Portland Cement CPV-ARI with limestone filler and, with a quartz filler, in both cases with 10% replacement of the cement by weight) against sodium and magnesium sulfate attack (concentration of SO4 2- equal to 0.7 molar). The data collected indicate that the replacing the cement by the two fillers generate different results, the quartz filler presented a mitigating behaviour towards the sulfate, and the limestone filler was harmful to Portland cement mortars, in both physical and chemical characteristics. |
License: | This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met. |
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10462092 - Published on:
25/10/2020 - Last updated on:
02/06/2021