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Significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2017

Significant Accounting Policies Details Narrative

Schedule of estimated useful lives

Depreciation of assets is determined using the straight-line method over the estimated useful lives of such assets as follows:

	Years
Buildings and other constructions:
Administrative facilities	Between 35 and 48
Main production structures	Between 30 and 49
Minor production structures	Between 20 and 35
Machinery and equipment:
Mills and  horizontal furnaces	Between 42 and 49
Vertical furnaces, crushers and grinders	Between 23 and 36
Electricity facilities and other minors	Between 12 and 35
Furniture and fixtures	10
Transportation units:
Heavy units	Between 11 and 21
Light units	Between 8 and 11
Computer equipment	4
Tools	Between 5 and 10

X

- References

No definition available.

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X

- Definition

The disclosure of detailed information about property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2017-01-01
-Paragraph 73
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73&doctype=Standard
-URIDate 2017-03-09

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