The sandstones of the Castillano Mineral deposit as construction material. Environmental benefit
Authors: Julio Cuni Calzada, Yoel Contrera Hernández, José Francisco Lastra Rivero
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Located in Santa Lucía, Mines of Matahambre, Pinar del Río, the quartzfelsdpathic sandstones belonging to the
San Cayetano Formation (J1-J5 2) They will constitute solid pollutants during the exploitation of the deposit, foreseen for next years. The present work shows the results of the evaluation of these sandstones, with the objective of characterizing them as arid. The works
were executed in the period 2011-2012. Empiric and theoretical methods were used such as: qualitative and
quantitative measurements of the physical-mechanical and chemical properties of the rock, laboratory experiments, statistical technical, the analysis and the synthesis. The techniques employees consisted on: sampling of rocks, sieved, determination of the organic impurity, chemical analysis and mixtures design. It´s was proven that these rocks have lower contained of sulphur (0. 28 % of SO3) and of organic matter (Plate #1), they are produce sand, granite (13-5 mm), gravel (19-10 mm) and obtain mortars for all the uses. The tests of hydraulic concrete revealed compressive strength values to among 3.7-24. 1 MPa, that which endorses their use for wall amble and not amble of blocks, brick for floor and different restore types, allowing their use of these sandstones from an echointegrative focus.