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Natural Stone Uses

Updated:2007-11-19 11:17:07
1.  Interior use: marble, slate, hard limestone, quartzite and granite are most often used to build solid steps, platforms, treads, risers, saddles and paving. 

Important considerations for selecting stone for this type of work are: surface finish, resistance to wear, slip resistance, resistance to staining, and maintenance. The use of porous limestones and soft clayey sandstones is not recommended. High traffic areas require less porous, harder stones as these are more resistant to staining and wear.

2.  Exterior use: bluestone, granite and other igneous rocks are more appropriate as they are more durable, resist weathering, and wear well. Abrasion resistance of stone selected for foot traffic may be determined with test methods described in ASTM C-241. Stone may become slippery when wet, therefore the following finishes are preferred for exterior use: tooled, flamed, sandblasted or natural cleft.

3.  For street curbing granite (sometimes bluestone) is used as it resists weathering and wears well. It is recommended that the top of street curb be flamed, or otherwise textured to make the curb more slip resistant.

4.  Regarding natural stone sills, stools, and copings see the recommendations described in paragraph 4.1 and 4.2.

5.  Open joint pavers may be used on a plaza, terrace, or on a roof where the designer prefers cavity under the pavers and where the rainwater or melted snow can be led along a sloping subsurface to concealed drain holes. Granite pavers with non-slip finishes are usually selected for such installations.

6.  Load-bearing: rubble, ashlar, base, riser, lintel, arches. For interior use natural stones with high compressive strengths are preferred. The main requirements for exterior use are low water absorption rate, high compressive strength and flexural strength with resistance to weathering.

7.  Non-load-bearing: veneer, wall facing, curtain wall panels, column covers, soffits, wainscots, and door jambs. For interior use mainly aesthetic requirements govern. For exterior application low water absorption rate and high flexural strength with resistance to weathering are the most important functional requirements.



source: Building Stone Institute
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