Rapid Hardening CSA Cement
Rapid Hardening Cement (Grade 42.5)
Introduction
General characteristics
The
product obtained by grinding cement clinker obtained by roasting suitable raw
material, consisting essentially of anhydrous calcium sulphoaluminate and
dicalcium silicate. Suitable gypsum and 0-10% limestone shall be blended with
clinker during manufacture of rapid-hardening sulphoaluminate cement. The
rapid-hardening cement product is hydraulicity binding material. It has high
early strength. The code no is R-SAC and with four grades.
Properties
1)
High early strength and high 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 of curing age.
2)
High froze-resistance property:
If
used at the temperature as low as 0-10℃,which early strength is
5-6 times than that of OPC; if used in 0-20℃ with little admixture, its
strength in 3-7d can reach 70-80% of designed strength, with very little
strength loss after 300 times of froze-thaw circle.
3)
High impermeability:
Because
of its dense structure, the impermeability of the concrete is 2-3 times than
that of OPC in same grade.
4)Anti-carbonation property:
It
has good anti-carbonation property, and low dry-shrinkage.
5)
Corrosion-resistance:
Rapid-hardening
cement has good corrosion-resistance quality, especially much better in
seawater corrosion resistance than that of high anti-sulphate Portland cement,
with more than 1 corrosion-resistance coefficient.
Data
Specific
surface area(m2/kg): ≥350
Setting
time(min): Initial setting time: ≥25 Final setting time: ≤180
(Remark:
the setting time can be adjusted according to the customer’s demand.)
Strength
data in different ages:
Grade
|
Compressive Strength (Mpa)
|
Bending Strength (Mpa)
|
||||
1
day
|
3
days
|
28
days
|
1
day
|
3
days
|
28
days
|
|
42.5
|
33.0
|
42.5
|
45.0
|
6.0
|
6.5
|
7.0
|
52.5
|
42.0
|
52.5
|
55.0
|
6.5
|
7.5
|
7.5
|
62.5
|
50.0
|
62.5
|
65.0
|
7.0
|
7.5
|
8.0
|
72.5
|
56.0
|
72.5
|
75.0
|
7.5
|
8.0
|
8.5
|
Application
Areas
1.
Construction in winter.
2.
Urgent repairs and rapid construction.
3.
Spraying anchor and supporting engineering.
4.
Water conservancy facilities and offshore projects.
5.
Bridge and road construction.
6.
Cement products and prefabricated components.
7.
Industrial and civil engineering,etc.
Storage
Bulk and weave package with
membrane, 40kg per bag, conservation in cool and dry place, prevent wet.
Note: Edit by Jack Young, 2011-11-02,as references
only. For more informations, please contact:
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