Matières premières
Calcium Aluminate Cement |
Index |
Item |
|
CA50-625 |
CA50-725 |
|
Al2O3, % |
≥50, <60 |
≥50, <60 |
SiO2,% |
≤8.0 |
≤8.0 |
Fe2O3,% |
≤2.5 |
≤2.5 |
Specific surface area, m2/Kg |
≥300 |
≥300 |
Setting time |
≥30 |
≥60 |
Compression strength , MPa |
40 |
64.7 |
Bending strength, MPa |
5.5 |
6.9 |
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 material.
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 increased.
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 the aluminate cement, clean all the mixing machinery.
2. Steam curing to accelerate concrete' s hardening. The curing temperature of aluminate cement 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.
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