Description

Low-alkalinity cement is high early-strength, low alkalinity, small free expansion.used in light-weight complex wall, GRC products Detailed Description 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/T*******7. The strength grade depends on its7 days compressive strength. There are three grades: *2.5, *2.5 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 *8G**1F******9 Main technical indexes 1. Specific surface area: ≥**0/kg. 2. Setting time: Initial setting time: ≥*5 min. Final setting time: ≤**0 min. 3. Alkalinity To the cement paste under the condition C/W=*0:1, the PH after hydrating 1 hour is less than *0.5. 4. Free expansive ratio: Under the condition cement/sand=1:0.5, the free expansive ratio is 0.*0%*0.*5% in *8 days. ***** strength in different age are not less than the following: 1d, Compressive strength (M pa):*5.0MPa 7d, Compressive strength (M pa):*2.5MPa 1d, Bending strength (M pa): 3.5MPa 7d, Bending strength (M pa): 5.0MPa 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.