Calcium Aluminate Cement CA50-625,725
Calcium Aluminate Cement is produced by preparing raw material
consisting of applicable bauxite and limestone, burning the raw
material and grinding into cement
Calcium Aluminate Cement can resist a high temperature at which a
relative high temperature at which a relative high strength still
remains. Its refractoriness increases with the content of CA2.
Therefore it is suitable to make refractory concrete as a binder.
Depending on the refractory aggregate (fireclay,high aluminum)
used,the refractory concrete made of the cement can be used below
Although the early strength of Calcium Aluminate Cement develops
rapidly, its later strength decreases. The rates of crystabls
conversion and strength reduction relates to atmospheric
temperature and humidity. In the saturated steam at 35°C，the
conversion is complete in 28d and the strength decreases to the
minimum, in the dry air below 20°C，the conversion is very slow. So
the HAC is not suited to use in building engineering. If it is used
in construction, matters needing attention given in the appendix
GB201 must be followed. In order make use of strong points of HAC
and overcome its weak point, cement scientists in the world have
developed various modified HAC and overcome its weak point, cement
scientists in the world have developed various modified HAC series:
self-stressing cement, expansive cement, impermeable non-shrinkage
cement, rapid hardening high strength Aluminate cement. Special
rapid hardening setting-controlled aluninate cement and so on.
These alumina cements with special properties are used in rush
repairs, quick construction impermeability, leakage stopping,
resistance to sulfate attack, winter constructions etc. We can
supply some derivative products of alumina cement series according
to requirements of special engineering
Calcium Aluminate Cement
Specific surface area, m2/Kg
Initial setting time,min
Final setting time,h
Compression strength , MPa
Bending strength, MPa
Calcium Aluminate Cement Construction method:
1. When preparing refractory concrete, fix on the aggregate
according to using condition. Choose the proper capacity graduation
to make maximum density. Be noted to match and adapt with cementing
2. According to certain proportion, add water and mix by man or
machine into mortar and then begin casting construction. Use up the
ready mortar within 40 min. Calcium Aluminate Cement’s hydration
heat concentrate on early stage. Casting thickness should not
exceed 3 cm each time. Water curing immediately when concrete goes
hardening and the curing time should not less than 3 days.
3. When prepare expanding cement, Calcium Aluminate clinker’s
dosage is 73-76%, CaSO4·2H2O dosage is 24-27%. When prepare
self-stressing cement, the mixing ratio of CaSO4·2H2O should be
Calcium Aluminate Cement Notice:
1. In order to avoid uncontrollable setting time, do not mix with
Portland cement, lime etc of which separate out calcium hydroxide
cementing material. Before use, clean all the mixing machinery.
2. Steam curing to accelerate concrete’s hardening. The curing
temperature should not higher than 50℃.
3. Refractory concrete’s late strength decline big, design should
according to the lowest stable strength. CA-50 bonded concrete’s
lowest stable strength should be determined by the lowest strength
of 7-14 days of demoulding sample curing in 20℃±1℃ water.
Calcium aluminate Cement Packing:
by 50kgs bag. Store in shady, cool and dry place. Avoid stamp and
mix with other substance.