scholarly journals Deterioration process of high belite cement paste exposed to sulfate attack, calcium leaching and the dual actions

2021 ◽  
Author(s):  
Chunmeng Jiang ◽  
Lin Yu ◽  
Xinjun Tang ◽  
Hongqiang Chu ◽  
Linhua Jiang
Keyword(s):  
Cement Paste ◽  
Sulfate Attack ◽  
Calcium Leaching ◽  
Deterioration Process ◽  
Belite Cement

Impact of cation type and fly ash on deterioration process of high belite cement pastes exposed to sulfate attack

2021 ◽  
Vol 286 ◽  
pp. 122961
Author(s):  
Chunmeng Jiang ◽  
Linhua Jiang ◽  
Shuangxi Li ◽  
Xinjun Tang ◽  
Lei Zhang
Keyword(s):  
Fly Ash ◽  
Sulfate Attack ◽  
Cement Pastes ◽  
Deterioration Process ◽  
Cation Type ◽  
Belite Cement

Long-term performance of cement paste during combined calcium leaching–sulfate attack: kinetics and size effect

2006 ◽  
Vol 36 (1) ◽  
pp. 137-143 ◽  
Author(s):  
D. Planel ◽  
J. Sercombe ◽  
P. Le Bescop ◽  
F. Adenot ◽  
J.-M. Torrenti
Keyword(s):  
Size Effect ◽  
Cement Paste ◽  
Sulfate Attack ◽  
Calcium Leaching ◽  
Long Term Performance ◽  
Term Performance

Impact of calcium leaching on mechanical and physical behaviors of high belite cement pastes

2021 ◽  
Vol 286 ◽  
pp. 122983
Author(s):  
Chunmeng Jiang ◽  
Linhua Jiang ◽  
Xinjun Tang ◽  
Jingwei Gong ◽  
Hongqiang Chu
Keyword(s):  
Cement Pastes ◽  
Calcium Leaching ◽  
Belite Cement

Sensitivity Analysis of Damage in Cement Materials under Sulfate Attack and Calcium Leaching

2012 ◽  
Vol 24 (4) ◽  
pp. 430-440 ◽  
Author(s):  
S. Sarkar ◽  
S. Mahadevan ◽  
J. C. L. Meeussen ◽  
H. van der Sloot ◽  
D. S. Kosson
Keyword(s):  
Sensitivity Analysis ◽  
Sulfate Attack ◽  
Calcium Leaching

scholarly journals Pore size analyses of cement paste exposed to external sulfate attack and delayed ettringite formation

2019 ◽  
Vol 123 ◽  
pp. 105766 ◽  
Author(s):  
Yushan Gu ◽  
Renaud-Pierre Martin ◽  
Othman Omikrine Metalssi ◽  
Teddy Fen-Chong ◽  
Patrick Dangla
Keyword(s):  
Pore Size ◽  
Cement Paste ◽  
Sulfate Attack ◽  
Delayed Ettringite Formation ◽  
Ettringite Formation

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

X-Ray Microtomography of an Astm C109 Mortar Exposed to Sulfate Attack

1994 ◽  
Vol 370 ◽  
Author(s):  
D.P. Bentz ◽  
Nicos. S. Martys ◽  
P. Stutzman ◽  
M. S. Levenson ◽  
E.J. Garboczi ◽  
...  
Keyword(s):  
Cement Paste ◽  
Sodium Sulfate ◽  
Three Dimensional ◽  
Sulfate Solution ◽  
Sulfate Attack ◽  
Sodium Sulfate Solution ◽  
Mortar Sample ◽  
Air Voids ◽  
X Ray ◽  
Dimensional Image

AbstractX-ray microtomography can be used to generate three-dimensional 5123 images of random materials at a resolution of a few micrometers per voxel. This technique has been used to obtain an image of an ASTM C109 mortar sample that had been exposed to a sodium sulfate solution. The three-dimensional image clearly shows sand grains, cement paste, air voids, cracks, and needle-like crystals growing in the air voids. Volume fractions of sand and cement paste determined from the image agree well with the known quantities. Implications for the study of microstructure and proposed uses of X-ray microtomography on cement-based composites are discussed.

scholarly journals THE EFFECT OF THE CALCIUM LEACHING ON CAPACITY FOR CHLORIDE ION BINDING OF THE HARDENED CEMENT PASTE

2013 ◽  
Vol 67 (1) ◽  
pp. 137-143 ◽  
Author(s):  
Kiyofumi KURUMISAWA ◽  
Yuto MURAKAMI ◽  
Kunihiko ISHIGAKI ◽  
Toyoharu NAWA
Keyword(s):  
Cement Paste ◽  
Chloride Ion ◽  
Ion Binding ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Calcium Leaching

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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