Grade 42.5-72.5 High-strength Rapid-setting CSA Cement
(Calcium Sulfoaluminate Cement)
Summary
● High-strength Rapid-setting Calcium Sulfoaluminate Cement, is one of special rapid hydraulic binding materials, also named Rapid-setting Cement, High-strength Cement, GRC Cement, Fast-hardening Cement and CSA cement. The code is R-SAC.
● With special physical performances for example early strength, high strength, rapid setting, fast hardening, low alkalinity, freeze resistance, sulfate corrosion resistance, etc.,
● Grade, 42.5, 52.5, 62.5, 72.5
Characteristics
● Appearance: light dusty grey color powder
● High early strength
● High development rate of strength
● 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
● Can get more fast hardening and demoulding if to use together with type SAC-1 Rapid-setting Accelerator
Technical Data
As per China National Standard GB20472-2006
● Specific Surface Area: 350m2/kg Min
● Initial setting time: 25 min Min;
● Final Setting Time: 3 hours Max
● Strength Value (MPa, Min)
Cement Grade |
Compressive Strength |
Flexture Strength |
1d |
3d |
28d |
1d |
3d |
28d |
42.5 |
30.0 |
42.5 |
45.0 |
6.0 |
6.5 |
7.0 |
52.5 |
40.0 |
52.5 |
55.0 |
6.5 |
7.0 |
7.5 |
62.5 |
50.0 |
62.5 |
65.0 |
7.0 |
7.5 |
8.0 |
72.5 |
55.0 |
72.5 |
75.0 |
7.5 |
8.0 |
8.5 |
Application
● To make concrete of impermeability, frost and sulfate corrosion resisting;
● To make large precast component, cast-in-place frame construction engineering, supporting by rock anchoring and shotcreting, segmental member, block, etc.;
● To make high-strength concrete;
● To make GRC (glassfibre reinforced cement) products, cement pipe, cement pole, cement brick, ostentatious board on outside wall and man-made marble products, etc.;
● To make artwares, cement members with European style, landscape, imitation mountains, sculpture, etc.;
● To be used in sea-water resistance project, for example sea wall, road and basic concrete near sea, aquarium of ocean park, sea-water management project, concrete pile in sea, etc;
● To make concrete construction of chemical resistance;
To be used in the underground well of mineral for rapid repair the laneway, shoring etc
● To be used in low temperature condition, for example in winter, in several kinds of mineral well.
● To be used in special concrete constructions such as high-speed way, airport runway, bridge, culvert, underground mineral well, dam of reservoir, banks of river, municipal works, subway, etc.;
● To make Sea water attack resistance projects for example sea wall, dam, mariculture project, sea water desalination project, oceanarium, etc.
Usage
● Ratio of concrete mixers must be determined by trial method. The recommended lowest used quantity of R-SAC is not less than 300kg every M3 concrete. Recommended W/C ratio should be 0.30-0.50.
● Don’t add water stir or vibrate by second times after R-SAC mortar or concrete does not has mobility.
● Don’t mix other kinds of cements or high alkali goods such as lime.
● It is necessary to cure R-SAC concrete on moisture condition after final setting of R-SAC concrete in Summer. Curing term is more than 3 days.
● Weather-proof and insulation is necessary when using R-SAC in winter. And must add 0.5%-4% frost preventing agent into R-SAC concrete.
● R-SAC is unfit for the engineering projects and position resistance to heat .
The cement product steam-cured temperature value is not less than 80ºC. The best steam-cured temperature is 60-70ºC. The steam-cured term is more than 2 hours.
● Must avoid to that the admixtures cause strength of concrete or cement products fall due to using admixtures.
● For getting rapid setting and fast hardening or demoulding of cement or concrete products, to recommend using type SAC-1 Rapid-setting Accelerator for SAC and HAC.
Storage, Transportation and Packing
● To be stored in dry cool storage and not mix foreign body
● Transportation: as per the common goods; classification for conveyance - not to be required; not to allow the packages to be fallen down or damaged
● Packing: 1MT jumbo bag