Harku Quarry Co. is based in an open pit Harku.

 

We produce crushed limestone and granite of different fractions, limestone, stone sand, fillers and filled ground.

In accordance with international quality control standards, Harku Quarry Co. has implemented an integrated quality and environmental management systems - ISO 9001:2008 и ISO 14001:2004

The quality parameters of our crashed limestone are checked in our laboratory and meet the requirements approved by European Standards:

EVS-EN 12620:2005 + A1:2008 "Aggregates for concrete";

EVS-EN 13043:2004 „Aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas”;

EVS-EN 13242:2006 + А1:2008 “Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction”;

EVS-EN 13450:2005 “Aggregates for railway ballast”.

 

Our crashed stone of different fractions is produced on modern high quality crashing and screening equipment.

In 2009 the high efficiency crashing and screening plant "Metso minerals" has started operation.

 

Below you can find average values of our crashed stone physical and mechanical (technical) characteristics:

flakiness index - Fl₁₅

shape index - Sl₁₅

Los Angeles coefficient – LA₂₅

freeze-thaw resistance (< 2%) – F₂

particle density– 2,6 mg/м³

water absorption - 1,3%