Calcium Sulfoaluminate Cement
(Grade 925)
Summary
● Super-high-strength Rapid-setting Calcium Sulfoaluminate Cement, also simply named CSA cement or CSA Binder, is a kind of hydraulicity binding material with special performances such as high early-strength, rapid-setting, fast-hardening, low alkali, resistance to freezing and thawing, sulfate resistance, etc.
● Grade: 925
Technical Data
● Specific Surface Area: 480m2/kg Min
● Setting Time (to be changed as per customers request):
Initial setting time, 25 min Min;
Final Setting Time, 3 hours Max
● Compressive Strength: 65.5MPa Min (1d), 90.0MPa Min (3d)
● Breaking Strength: 9.0MPa Min (1d), 9.9MPa Min (3d)
Characteristics
● Appearance: powder with light dusty grey color
● High early strength
● High strength development rate
● Rapid setting: initial setting and final setting both are earlier than Portland cement.
● Micro expansion
● Low degree of shrinkage
● Low alkali: PH value is about 11 and lower than Portland cement.
● Feeble rust to steel
● Resistance to freezing and thawing
● Impermeability
● Resistance to sulfate attack
Application
● To produce concrete of Impermeability, Resistance to freezing, early-strength, high-strength and sulfate resistance attack
● To make high-strength concrete such as C60 of more high strength
● To make big precast element and cast-in-place concrete construction
● To produce GRC products, cement pestle, piping, man-made marble products, Europe-style structural member, artwares, etc. ;
● Construction at negative temperature
● Fast repairing road
● Producing and repairing wall and floor of cold store
● To build expressway, flight line, bridge and culvert, river embankment, dam of reservoir, underground, municipal engineering, undermine, etc;
● To be used in projects of sea water resistance such as sea embankment, sea dam, marine-culture engineering, sea water desalination engineering, oceanarium engineering, etc.
● To make special building materials.
Usage and Caution
● It is necessary to first confirm the ratio of several materials of concrete via trial then to be used in big concrete products. To recommend that the cement quantity of grade 925 each m3 concrete is not low than 300kg. W/C is controlled between 0.3 to 0.5.
● It is not allowed to mix high alkali goods for example other kind of cement or lime.
● It is not allowed secondary water mixing or secondary vibration when cement mortar or concrete lose fluidity.
● To cure concrete in wet in time when final setting and to recommend the curing time is not short than 3 days.
● When construction in winter, it must have measures of wind-prevent and keep temperature. And to add the antifreeze agent.
● Not allow to be used in anti-hot construction and position.
If producing cement or concrete products in steam-cured procession, the recommended steamed temperature is not higher than 60 degree centigrade.
● To recommend to use grade 925 CSA cement together with type SAC-1 Rapid-setting Accelerator. It will get more rapid setting and fast hardening of cement or concrete products.
Transportation and Storage
● Not allow to mix sundries or to be wetted within transportation and storage.
● Stored in the cool and dry ventilated places.
● Not allow to be stored together with other kinds of cement.
Packing
● 1MT jumbo bag