The National Company of Aggregates " ENG " stemming from the reorganization of the SNMC (National Company of Building Materials) was created by decree N ° 86.270 of November 04th, 1986, with effect from January 1st, 1987. The National company of Aggregates passed to autonomy on May 05th, 1990. It is a joint-stock company with a social capital of 1 billion dinars. The actions of the ENG were distributed: From May 05th, 1990 between the funds of participation construction, mines and chemistry...