Lisboa Sintra Amarelo Negrais Limestone Roufimar





Lisboa Sintra Amarelo Negrais Limestone Roufimar

Lisboa Sintra Amarelo Negrais Limestone Roufimar


Lisboa Sintra Amarelo Negrais Limestone Roufimar

Localization
District - LISBOA
Municipality - SINTRA
Parish - ALMARGEM DO BISPO
Site - NEGRAIS


Macroscopic Description
Microcrystalline golden-yellow limestone, calciclastic and bioclastic, with coarse elements and slightly tectonized.

Prevailing Applications
Coverings, for interiors in preference. Furniture tops

Physio-Mecanical Properties
1. Compression breaking load 1440 kg/cm2
2. Compression breaking load after freezing test 1120 kg/cm2
3. Bending strength 142 kg/cm2
4. Volumetric weight 2674 kg/m3
5. Water absorption at N.P. conditions 0.4 %
6. Apparent porosity 1.2 %
7. Thermal linear expansion coefficient max. val. 4.4 x 10 -6 perº C
8. Abrasion test 2.8 mm
9. Impact test: minimum fall height 50 cm
Obs. Frost resistance is more than 96 freeze-thawing cycles.
 
General Description of the Quarry
This quarry, already widely exploited, is opened on a gentle sloping area; the superficial zone of the outcrop is very fractured and very weathered. Three dolerite veins spaced about 20 meters are observed, as well of some joints and a fault lying in one of the lateral sectors. The beds are sub horizontal and have N 70º W, 9º NNE attitude in the northern zone of the quarry and N 60º E, 15º SSE in the southern one. The rock exploited is a microcrystalline limestone similar to the Abancado type, with very closed stylolites. The fracturation of the exploited bed is more intense on the northern zone of the quarry. The blocks extracted are usually of medium size and their cutting is usually performed by planes parallel to the stratification plane. Although the area has been widely exploited, there are some reserves of this type of stone.



















Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar
Lisboa Sintra Amarelo Negrais Limestone Roufimar

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