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.

Main specifications
1.Specific surface area: ≥400m2/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.

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.
Package and storage:
bulk and weave package with membrane, 50kg per bag, conservation in cool and dry place, prevent wet.