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Low-alkalinity sulphoaluminate cement |
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CAS NO: CSA
Quantity: 20Metric Tons
Price: 80USDMetric Tons
Payment: T/T
Additional_detail: The product obtained by grinding
sulphoaluminate cement clinker,
consisting of essentially
anhydrous calcium
sulphoaluminate. Suitable gypsum
shall be blended with clinker
during manufacture of low-
alkalinity cement. The product
has low alkalinity and small free
expansion property. It is
hydraulicity binding material.
The code no is L-SAC.
The product carries out the
standard: JC/T659-1997. The
strength grade depends on its7
days compressive strength. There
are three grades: 32.5, 42.5 and
52.5.
The product achieved a class
second provincial prize of
excellent new product, a class
third provincial prize of
improvement science and
technology.
It is one of important new
product of state. The item code
is 98G041F6200009.
Main technical indexes
1. Specific surface area:
≥400㎡/kg.
2. Setting time:
Initial setting time: ≥25 min.
Final setting time: ≤180 min.
3. Alkalinity
To the cement paste under the
condition C/W=10:1, the PH after
hydrating 1 hour is less than
10.5.
4. Free expansive ratio:
Under the condition
cement/sand=1:0.5, the free
expansive ratio is 0.00%-0.15% in
28 days.
5. The strength in different
age are not less than the
following:
Grade Compressive strength (M
pa) Bending strength (M pa)
1d 7d 1d 7d
32.5 25.0 32.5 3.5
5.0
42.5 32.0 42.5 4.5
6.0
52.5 39.0 52.5 5.0
6.5
Properties:
Besides the high early-strength
property as rapid-hardening
cement, low alkalinity cement has
some other characteristics such
as low alkalinity、 small
expansive ratio、 short stability
time、 and small dry-shrinkage
rate, compounded with glass
fiber. It has high strength
retaining ratio and longer work-
time, so it is the special cement
for making GRC products.
Applications:
The cement can be used to produce
light-weight complex slab of
internal and external wall, and
GRC products such as corrugated
tile, net-frame slab, ventilation
duct, and some other structures.
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