Effect of Sodium Impurities on Phase and Microstructure Evolution in Calcium Aluminate Cement Bonded Castables at High Temperatures

2014 ◽  
pp. 909-916
Author(s):  
J. Alex ◽  
L. Vandeperre ◽  
B. Touzo ◽  
C. Parr ◽  
W. E. Lee
Keyword(s):  
High Temperatures ◽  
Microstructure Evolution ◽  
Calcium Aluminate ◽  
Calcium Aluminate Cement ◽  
Aluminate Cement

The effect of nanoparticles on the properties of calcium aluminate cement pastes at high temperatures

2018 ◽  
Vol 30 (5) ◽  
pp. 195-203 ◽  
Author(s):  
Chaohua Jiang ◽  
Huiwen Yuan ◽  
Chunhua Lu ◽  
Zhongzi Xu ◽  
Duyou Lu
Keyword(s):  
High Temperatures ◽  
Calcium Aluminate ◽  
Calcium Aluminate Cement ◽  
Cement Pastes ◽  
Aluminate Cement

scholarly journals Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3855
Author(s):  
Amirmohamad Abolhasani ◽  
Bijan Samali ◽  
Fatemeh Aslani
Keyword(s):  
Temperature Rise ◽  
Calcium Aluminate ◽  
Elevated Temperatures ◽  
Ultrasonic Pulse Velocity ◽  
Pulse Velocity ◽  
Calcium Aluminate Cement ◽  
Cement Concrete ◽  
Sem Images ◽  
Strength Deterioration ◽  
Aluminate Cement

One commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, X-ray diffraction (XRD), and scanning electron microscopy (SEM) imaging and the variation in the concrete physical features and the compressive strength deterioration with temperature rise were examined through ultrasonic pulse velocity (UPV) values. In addition, other mechanical features that were addressed were the residual tensile strength and elastic modulus. According to the XRD test results, with the temperature rise, the dehydration of the C3AH6 structure occurred, which, in turn, led to the crystallization of the monocalcium dialuminate (CA2) and alumina (Al2O3) structures. The SEM images indicated specific variations in morphology that corresponded to concrete deterioration due to heat.

Sign in / Sign up

Export Citation Format

Share Document