Calcium Aluminate Cement
Description of High Temperature Alumina Cement
Calcium aluminate cement, alumina cements or high alumina cements are obtained by the reaction at high temperature of lime (from limestone) and alumina (contained in natural minerals like bauxite). The aluminate cement obtained after cooling is a hard mineral: calcium aluminate clinker. Ground into a fine powder, the clinker becomes calcium aluminate cement (CAC) which forms a paste when mixed with water. The aluminate cement has the ability to harden very quickly: it forms a rigid solid within 24 hours.
Application of Calcium Aluminate Cement
There are two distinct ways to use calcium aluminates: as high-performance binders and as mineral reagents in a variety of industries.
As binders, calcium aluminates are used in concretes and mortars for specialized applications for their properties of resistance to corrosion, abrasion and heat combined with rapid hardening and the ease of controlling grading variations.
Calcium aluminate cements are also used in combination with other fine components. Hydraulic binders with new properties are then obtained. In this way, the calcium aluminate powderacts as both a complex hydraulic binder and a mineral reagent interacting with the other components in the mix.
As reagents, calcium aluminates are found in non-hydraulic systems. This is the case in metallurgical treatments (iron and steel industry, foundry) where specific grades of calcium aluminate are used for their low-temperature melting properties and for trapping molten metal impurities.
Calcium Aluminate Cement CA50 specification:
|
Index |
Item |
|
|
CA50-625 |
CA50-725 |
|
|
Al2O3,% |
≥50,＜60 |
≥50,＜60 |
|
SiO2,% |
≤8.0 |
≤8.0 |
|
Fe2O3,% |
≤2.5 |
≤2.5 |
|
Specificsurfacearea,m2/Kg |
≥300 |
≥300 |
|
SettingtimeInitialsettingtime,minFinalsettingtime,h |
≥30≤6 |
≥60≤8 |
|
Compressionstrength,MPa1d3d |
4050 |
|
|
Bendingstrength,MPa1d3d |
|
|
Calcium Aluminate Cement Construction Method:
Calcium Aluminate Cement Notice:
Calcium Aluminate Cement Packing:
by 50kgs bag. Store in shady, cool and dry place. Avoid stamp and mix with other substance.
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