Expansion Behavior of Portland Cement Mortars under Sulfate Attack

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.

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Differentiating seawater and groundwater sulfate attack in Portland cement mortars

Cement and Concrete Research ◽

10.1016/j.cemconres.2006.09.011 ◽

2006 ◽

Vol 36 (12) ◽

pp. 2132-2137 ◽

Cited By ~ 56

Author(s):

Manu Santhanam ◽

Menashi Cohen ◽

Jan Olek

Keyword(s):

Portland Cement ◽

Sulfate Attack ◽

Cement Mortars

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The Impact of Aluminum- and Iron-Bearing Admixtures on the Resistance of Portland Cement Mortars to Alkali-Silica Reaction and Sulfate Attack

Materials Sciences and Applications ◽

10.4236/msa.2015.66058 ◽

2015 ◽

Vol 06 (06) ◽

pp. 539-548

Author(s):

Alexey Brykov ◽

Anna Anisimova ◽

Natalya Rozenkova ◽

Mohammed Hadi ◽

Maxim Mokeev

Keyword(s):

Portland Cement ◽

Sulfate Attack ◽

Alkali Silica Reaction ◽

Cement Mortars ◽

The Impact ◽

Iron Bearing

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Evaluation of external sulfate attack (Na2SO4 and MgSO4): Portland cement mortars containing siliceous supplementary cementitious materials

Revista IBRACON de Estruturas e Materiais ◽

10.1590/s1983-41952020000400003 ◽

2020 ◽

Vol 13 (4) ◽

Cited By ~ 1

Author(s):

Diego Jesus de Souza ◽

Marcelo Henrique Farias de Medeiros ◽

Juarez Hoppe Filho

Keyword(s):

Compressive Strength ◽

Portland Cement ◽

Cementitious Materials ◽

Sulfate Attack ◽

Supplementary Cementitious Materials ◽

Hardened Cement ◽

X Ray Diffraction ◽

Sulfate Ions ◽

Cement Mortars ◽

Physical And Chemical

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 containing silica fume and rice husk ash, in both cases with 10% replacement of the cement by weight) against sodium and magnesium sulfate attack (concentration of SO42- equal to 0.7 molar). The data collected indicate that the replacing the cement by the two siliceous supplementary cementitious materials (SCMs) generate similar results, both SCMs were able to mitigate the effects of the sodium sulfate attack in both physical and chemical characteristics, however, both materials increase the deterioration (i.e. compressive strength) when exposed to MgSO4 solution.

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