[Standard]: GB-1596-91

[Molecular formula]: SiO₂ Al₂O₃

[Properties]: for concrete :

No.	index	Grade			Test method
		I	II	III
1	fineness (0.45mm ), %	12	20	45	GB1596-91appendix A
2	rate of water , %	95	105	115	GB1596-91appendix B
3	loss on ignition %	5	8	15	GB/T176-1996
4	moisture %	1	1	no stipulation	GB176
5	sulphur trioxide %	3	3	3	GB/T176-1996

2. for the production of cemen:

No.	index	Grade
		I	II
1	loss on ignition %	5	8
2	moisture %	1	1
3	sulphur trioxide %	3	3
4	compressive strength ratio in 28 days %	75	62

[Properties]: Gray powder.

[Uses]: Used in concrete, sand paste, road, building, ceramic or agriculture

[Packing & storage]: 40kg in woven bag lined with plastic or tank, avoid moisture.