ISO Standard Sand

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