Mitigation potential of sulfate-resistant Portland cement for internal sulfate attack

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Laura P. M. Camanducaia ◽  
Nathalia C. S. Santos ◽  
Ronaldo A. Medeiros-Junior
Keyword(s):  
Portland Cement ◽  
Sulfate Attack ◽  
Mitigation Potential ◽  
Internal Sulfate Attack

Use of Raman spectroscopy to characterize the effect of nanomagnetite as an addition to Portland cement paste on mitigating internal sulfate attack

2020 ◽  
Vol 262 ◽  
pp. 120803
Author(s):  
Tassiane A. Oliveira ◽  
Igor M. Pinkoski ◽  
Mariana O.G.P. Bragança ◽  
André Assmann ◽  
Isabela C. Oliveira ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Portland Cement ◽  
Cement Paste ◽  
Sulfate Attack ◽  
Portland Cement Paste ◽  
Internal Sulfate Attack

Effect of crystalline admixture and polypropylene microfiber on the internal sulfate attack in Portland cement composites due to pyrite oxidation

2021 ◽  
Vol 308 ◽  
pp. 125018
Author(s):  
Mateus E.G. Dobrovolski ◽  
Guilherme S. Munhoz ◽  
Eduardo Pereira ◽  
Ronaldo A. Medeiros-Junior
Keyword(s):  
Portland Cement ◽  
Pyrite Oxidation ◽  
Sulfate Attack ◽  
Cement Composites ◽  
Internal Sulfate Attack

Expansion of portland cement mortar due to internal sulfate attack

1997 ◽  
Vol 27 (9) ◽  
pp. 1299-1306 ◽  
Author(s):  
Yan Fu ◽  
Jian Ding ◽  
J.J. Beaudoin
Keyword(s):  
Portland Cement ◽  
Cement Mortar ◽  
Sulfate Attack ◽  
Internal Sulfate Attack

Effect of S2Cl2Addition on the Sulfate Attack of Hydrated Portland Cement

2009 ◽  
Vol 51 (3) ◽  
pp. 110-115
Author(s):  
H. Aygül Yeprem ◽  
Selahattin Gökmen
Keyword(s):  
Portland Cement ◽  
Sulfate Attack

scholarly journals Influence of Benzenediols—Pyrocatechol and Resorcinol—On the Resistance of Portland Cement Mortars with Aluminum Sulfate to Sulfate Attack

2018 ◽  
Vol 09 (02) ◽  
pp. 305-313
Author(s):  
Alexey Brykov ◽  
Natalia Paritskaya ◽  
Alexander Velichko ◽  
Maxim Mokeev
Keyword(s):  
Portland Cement ◽  
Aluminum Sulfate ◽  
Sulfate Attack ◽  
Cement Mortars

D108 Multi-Mode X-ray Study of Sulfate Attack of Portland Cement—Invited

2005 ◽  
Vol 20 (2) ◽  
pp. 176-176
Author(s):  
K. Kurtis
Keyword(s):  
Portland Cement ◽  
Sulfate Attack ◽  
X Ray ◽  
Multi Mode

scholarly journals Deterioration Process of Concrete Exposed to Internal Sulfate Attack

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1336 ◽  
Author(s):  
Weifeng Chen ◽  
Bei Huang ◽  
Yuexue Yuan ◽  
Min Deng
Keyword(s):  
Compressive Strength ◽  
Sulfate Attack ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Great Loss ◽  
Sulfate Ions ◽  
Coarse Aggregates ◽  
Deterioration Process ◽  
One Year ◽  
Internal Sulfate Attack

Damage to concrete structures with gypsum-contaminated aggregate occurs frequently. Aggregates in much of the southern part of China are contaminated with gypsum. Therefore, in this study, the effects of using different quantities of gypsum-contaminated aggregate on the expansion and compressive strength of concrete were investigated over a period of one year. Two groups of concrete were designed with the gypsum-contaminated aggregate containing different parts of fine and coarse aggregate, respectively. The SO3 contents were 0%, 0.5%, 1%, 1.5%, 3%, 5%, and 7% by weight of aggregate. X-ray diffraction (XRD), thermogravimetry (TG), and differential scanning calorimetry (DSC) were used to analyze the change in mineral composition over time. The microstructure was also studied by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The results showed that significant expansion and great loss in compressive strength did not occur in concrete if the content of SO3 lay below 1.5% and 3% in fine and coarse aggregates, respectively. The concentration of sulfate ions in concrete was not enough to form new a phase of gypsum. During the process of internal sulfate attack, the content of gypsum decreased and the content of ettringite increased. Ettringite was the main reason for the expansion damage of concrete. Additionally, the fracture mode of internal sulfate attack on concrete was the crack extension from gypsum to paste; finally, the aggregate separated from the paste.

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