A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sulfate attack of cement matrix containing inorganic alkali-free accelerator
Abstract This paper presents an experimental study on the durability of mortar specimens incorporating inorganic alkali-free accelerator (AFA) exposed to external sulfate attack. Visual examination, compressive strength, expansion and density of mortar specimens with or without AFA were monitored up to 360 days of exposure. Additionally, in order to identify the products formed by sulfate attack, mineralogical analysis based on x-ray diffraction (XRD) was also performed on paste samples. Test results confirmed that the mortar specimens with AFA suffered a serious deterioration by sulfate attack, especially in 10% sodium sulfate solution. Furthermore, XRD traces indicated that the formation of ettringite and/or thaumasite is primarily responsible for the sulfate deterioration of mortar specimens. Conclusively, it must be taken a special care when the shotcrete with AFA is applied under the sulfate-bearing environments.
Sulfate attack of cement matrix containing inorganic alkali-free accelerator
Abstract This paper presents an experimental study on the durability of mortar specimens incorporating inorganic alkali-free accelerator (AFA) exposed to external sulfate attack. Visual examination, compressive strength, expansion and density of mortar specimens with or without AFA were monitored up to 360 days of exposure. Additionally, in order to identify the products formed by sulfate attack, mineralogical analysis based on x-ray diffraction (XRD) was also performed on paste samples. Test results confirmed that the mortar specimens with AFA suffered a serious deterioration by sulfate attack, especially in 10% sodium sulfate solution. Furthermore, XRD traces indicated that the formation of ettringite and/or thaumasite is primarily responsible for the sulfate deterioration of mortar specimens. Conclusively, it must be taken a special care when the shotcrete with AFA is applied under the sulfate-bearing environments.
Sulfate attack of cement matrix containing inorganic alkali-free accelerator
Lee, Seung Tae (author) / Kim, Dong Gyou (author) / Jung, Ho Seop (author)
KSCE Journal of Civil Engineering ; 13 ; 49-54
2009-01-01
6 pages
Article (Journal)
Electronic Resource
English
Novel environment-friendly liquid alkali-free cement accelerator
| European Patent Office | 2021
| European Patent Office | 2023
Alkali-free shotcrete accelerator interactions with cement and admixtures
| British Library Conference Proceedings | 2004
Alkali Silica Reaction and Sulfate Attack: Expansion of Limestone Calcined Clay Cement
| Springer Verlag | 2017
Cement composition and sulfate attack
| Elsevier | 2006