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The sedimentary rocks more using are those of mechanical
sedimentation, as the gravel, the sands and the clays; those of compact
mechanical sedimentation, like the conglomerates and erinaceous ones; those of
chemical sedimentation, plaster or aljez, the limestone, the dolomía and the
marls, those of organic sedimentation, like limestone, the silica and the coals.
Basalt. They are very compact rocks composed of feldspar, augite, olivine and
iron minerals, its color is gray blackish that sometimes acquires a metallic
brightness. They are very hard stones that prevent their use in carved works and
resist very little to the fire.
Marinate. It marinates is a mud partition without cooking, the Earth
whereupon becomes must be clean without stone and with the smaller possible
amount of sand. In an excavation but done previously in the ground, it is let
soak the Earth from a day to another one so that it rots is kneaded sufficiently
adding water to him to form a mixed and massive affluent mud, revolves some to
him of the following materials: straw, sácate, dung, leaves of pine, horsehairs
and hairs of beast in proportion 1: 5 so that it serves as mooring the material.
Tepetate. Tepetate is clay is in massive heavy mantles. It is a granular,
heavy, light material, yellowish color and of average consistency. 3Kg/cm2
resists, obtaining sillares for walls (40 xs 60). He is material porous and
absorbent of water. It is a good insulator of fried and the heat reason why it
agrees to use them in extremists climates, mixes for the brick manufacture.
Roofing tile. Flamenco roofing tile. It is a roofing tile of
characteristics similar to the Arab but, in this case, it takes in its later
part a projection to facilitate enlistment with the following ones. Flat roofing
tile. The flat roofing tile without embroider can be molded in press of row or
caker. The used mass is the one of embroider and this must be molded in presses
of metallic molds; its drying takes place placing them in bookcases destined to
that aim, so that the air circulates around both faces; its baking is equal to
the one of bricks. Arab roofing tile. It has forms of conical channel and their
current dimensions but are 45cm of length by 12 and 16 of wide n, 8cm. Of height
and 12mm. Of thickness. One mold Gradilla metallic generally by hand of
trapezium form, and when the paste molder acquires consistency occurs curved
form him. The drying is made of the same form that in bricks.
Tiles. It is a ceramic paste piece of little thickness, covered by an
enamel layer it can be smooth or with drawings in different colors forms and
sizes: the favorite forms are the square and rectangular the their dimensions
oscillate between 10 xs 10, 15 xs 15, 20 xs 20 and 20 xs 30 cm. At the moment
make also with other nonrectangular forms. |
