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Sales of goods (Details) - PEN (S/) S/ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenue [abstract] |  |  |
Cement, concrete and blocks | S/ 1,076,648 | S/ 1,103,426 | S/ 1,089,232
Building materials | 66,442 | 59,888 | 75,565
Quicklime | 80,707 | 75,090 | 64,140
Other | 1,842 | 1,765 | 2,078
Stotal sales of goods | S/ 1,225,639 | S/ 1,240,169 | S/ 1,231,015

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