Services

Aggregates

Hong Kong Testing Co., Ltd. provides physical and chemical testing of aggregate according to
British Standard (BS 812),
American Standard (ASTM) and
Hong Kong Construction Standard (CS3)

Physical
• Particle size distribution
• Clay, silt and dust content
• Flakiness index
• Elongation index
• Shell content
• Relative density and water absorption
• Bulk density
• Moisture content
• Aggregate crushing value
• Methylene blue value
• Los Angeles value
• Ten per cent fines value
• Impact value
• Soundness
• Drying shrinkage
• Effect of organic substances by mortar method

Chemical
• Total sulphate content
• Acid / Water-soluble sulphate content
• Acid / Water-soluble chloride salts
• Acid-soluble material
• Soluble calcium oxide content
• Soluble silica content
• Presence of humus