ISO standard sand
Standard: ISO R679~68, GB178-77
Description
The ISO standard sand is the indispensable material for cement mortar strength test, it’s widely used in cement factory and construction laboratory, our ISO standard sand are all come with calibration certificate
Technical specifications
1. The SiO2 content >96%
2. Loss of burning< 0.40%
3. Sand content (including Soluble salt) <=0.20%
4. Packing weight: 20.25kg/pkg, 15bags/pkg
5. Origin: Xiamen city, China
