Research Paper
AN OVERVIEW ON HIGH ALUMINACEMENTASCASTABLE BONDING SYSTEM
Author: Vijay Kumar*, Abhinav Srivastava, V. K. Singh
Department of Ceramic Engineering
Institute of Technology,
Banaras Hindu University,
Varanasi-221005, India
*Corresponding Author: Vijay Kumar- vijaykumaritbhu@gmail.com
{published research paper}
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ABSTRACT
The term high alumina cements stands for a family of refractory cements for high performance application; the calcium aluminate cements (CAC) or high alumina cement (HAC). The hydraulic strength development is due to a water bonding reaction of the calcium aluminate minerals to water-resistant hydrate phases (not water dissolvable). It is cold bonding system. Alumina contents of high performance HAC equal or exceed 70%, and remaining CaO content. The difference in mineral constitution between HAC and Portland cement can be seen in the CaO-Al2O3-SiO2 Phase diagram. Portland cement occurs in the relatively high CaO region, with C2S and C3S as its main constituents. Calcium alumina cement on the other hand, occurs in a region with high Al2O3 (and low CaO and SiO2), a factor that accounts for their higher melting point and used as refractory cement, where CA, CA2, CA6, C12A7 are the main constituents in high alumina cement.
