Rapid hardening sulphoaluminate cement 42.5
with high early strength,rapid hardening,sulphate resistant,low alkali, it is suitable to produce fiber cement board, cement board, cement component ect cement products.
Main composition: C4A3S
Second phase:C2S
Technical index:
Specific surface area(m2/kg): >350
Setting time(min): initial setting time: >25
Final setting time: <180
Type:grade 42.5
Compressive strength:42.5mpa in only 3days, higher strength in later term
Bending strength:6.5mpa in 3 days, and higher strength in later term
Properties
1) High early strength andhigh strength properties
Its compressive strength can reach 35-50Mpa within 1 day,50-70Mpa after 3 days, and it also can grows continually with the increasing ofcuring age.
2) High froze-resistanceproperty:
If used at the temperature as low as 0-10℃,which early strength is5-6 times than that of OPC; if used in 0-20
Properties
1) High early strength andhigh strength properties
Its compressive strength can reach 35-50Mpa within 1 day,50-70Mpa after 3 days, and it also can grows continually with the increasing ofcuring age.
2) High froze-resistanceproperty:
If used at the temperature as low as 0-10℃,which early strength is5-6 times than that of OPC; if used in 0-20℃ with little admixture, its strengthin 3-7d can reach 70-80% of designed strength, with very little strength lossafter 300 times of froze-thaw circle.
3) High impermeability:because of its dense structure, the impermeability of the concrete is 2-3 timesthan that of OPC in same grade.
4) Anti-carbonationproperty: it has good anti-carbonation property, and low dry-shrinkage.
5) Corrosion-resistance: ithas good corrosion-resistance quality, especially much better in seawatercorrosion resistance than that of high anti-sulphate Portland cement, with morethan 1 corrosion-resistance coefficient.
with little admixture, its strengthin 3-7d can reach 70-80% of designed strength, with very little strength lossafter 300 times of froze-thaw circle.
3) High impermeability:because of its dense structure, the impermeability of the concrete is 2-3 timesthan that of OPC in same grade.
4) Anti-carbonationproperty: it has good anti-carbonation property, and low dry-shrinkage.
5) Corrosion-resistance: ithas good corrosion-resistance quality, especially much better in seawatercorrosion resistance than that of high anti-sulphate Portland cement, with morethan 1 corrosion-resistance coefficient.
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