David Ball Specialist Sands

David Ball Group is widely regarded as the worldwide market leader in the supply of ultra- high-quality Standard Reference Materials – David Ball Specialist Sands.

For more than 35 years the company has been exporting its unique ultra-high-quality industrial sands around the world for cement testing, electric fuse filling, man made fibre production, water filtration, and all areas where consistency and quality of product are paramount.

Tsing Ma Bridge is a bridge in Hong Kong, China. It is the world's sixth largest suspension bridge. The bridge was named after two of the islands in Hong Kong, namely Tsing Yi and Ma Wan . It has two decks and carries both road and rail traffic, which also makes it the largest suspension bridge of this type.

Construction work of the bridge began in May 1992 and ended in May 1997. It cost HK$7.2 billion.

Special Features:

• All physical tests on soil density, concrete strength, cement quality and the integrity of the road surface were carried out using David Ball Specialist Sands products.
• Largest Combined road and rail suspension bridge in the world.