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zongyi Jun 12

Natural stone of several characteristics of fire resistance of various stone are different, some stone under high temperature, the occurrence of chemical decomposition. Stone is also thermal expansion and contraction, but if the heat after cooling, the contraction can not return to the original volume, and will retain a part of a permanent expansion; frozen stone in wet conditions.How to Clean Composite Wood Furniture

can resist freezing and thawing without significant The destroyer, this performance is called freezing resistance. The moisture in the rock's pores is frozen at temperatures below 20 ° C, and the water in the pores expands 1/10 larger than the original volume. If the rock does not resist the force of this expansion, the damage will occur. Generally, if the water absorption is less than 0.5%, the frost resistance is not considered.composite decking in australia price

Compressive strength The compressive strength of the stone may vary depending on factors such as mineral composition, crystal thickness, uniformity of cemented material, area of ​​load, load and cleavage angle. If the other conditions are the same, the crystalline particles are usually small and bonded together with the dense material, with high strength.white composite wood outdoor furniture

Dense volcanic rocks in the dry and saturated water, the compressive strength is no difference (water absorption is very low), if it is porous and fear of cementing rock, its dry and wet strength, there are significant differences.cost per ft to install a composite fence