What are some uses of pumice?? The main sources??? Anything else you know???

Question

I have a project for this week and it's dealing with pumice, the mineral. I know where it comes from, but I don't know many of the sources and uses of it. Can you please help me??

Answer 1

Pumice rocks are igneous rocks which were formed when lava cooled quickly above ground. You can see where little pockets of air had been. This rock is so light, that many pumice rocks will actually float in water. Pumice is actually a kind of glass and not a mixture of minerals. Because this rock is so light, it is used quite often as a decorative landscape stone. Ground to a powder, it is used as an abrasive in polish compounds and in Lava© soap.

pumice is a light colored, highly vesicular volvanic glass. it's formed from silica lavas rich in dissolved volatiles, particularly water vapor. the cellular nature of pumice is well illustrated by its specific gravity (less than 1, can float on water). Permeability is ver low since each cell is sealed off from its neighbours by a thin membrane of glass.

the cellular nature of pumice, pumicite, scoria and volcanic cinders gives these materials their 2 main properties of value *light weight *insulating ability. the rocks are utilized mainly in the construction industry, in light weight structural concrete, as plaster aggreagte, and as loose fill insulations. coarse pumice aggregate is used extensively in the manufacture of concrete blocks and masonry products.

pumice reduces the weight of concrete blocks, thus making handling easier, minimizing the bulk of foundations or supporting columns in multi-story buildings, and reducinf the reinforcement required in suspended floors. the high insulation value of pumice reduces the bulk required to meet thermal and acoustic standards, in addition the material is fireproof and resists condensation, mildew and vermin.

pumice and pumicite may be finely ground and added to portland cement as pozzolan material.

pumice and pumicite are used as abrasive in hand soaps, household cleaners and polishing powders for objects as sensetive as teeth and electronic circuit boards, this was the main use until about 1940 but now it is of minor importance. they are also used in filtration and as a nonskid coating in paint, a soil substitute and additive and a constituent of sulfur matches and strikers.

major world production of pumice and scoria : Italy, Greece, France, USA, West Germany ..

PROPERTIES
Distinctive features:
White or creamy white high vesicular rock, but weathers to a pale brown on its surface. Very low density.

Colour:
Creamy white when fresh, but turn pale brown on surface when weathere.

Texture and granularity:
Vesicular.

Composition:
Composed principally of glass froth of granitic to granodioritic composition.

Field associations:
Chiefly on rhyolitic to dacitic volcanoed.

Answer 2

pumice is used for paint.Pumice is widely used to make lightweight concrete and as an abrasive, especially in polishes and cosmetics exfoliants. Pumice stones are often used in salons during the pedicure process to remove dry and excess skin from the bottom of the foot and also calluses. When used as an additive for cement, a fine-grained version of pumice called pozzolan is mixed with lime to form a light-weight, smooth, plaster-like concrete. This form of concrete was used as far back as Roman times.

Pumice also happens to be so porous that it floats naturally on water.





Pumice is considered a glass because it has no crystal structure. Pumice varies in density according to the thickness of the solid material between the bubbles; many samples float in water. After the explosion of Krakatoa rafts of pumice up to 25m long floated through the Pacific Ocean for up to two years, some with palm trees and other vegetation growing on them.

Answer 3

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RE:
What are some uses of pumice?? The main sources??? Anything else you know???
I have a project for this week and it's dealing with pumice, the mineral. I know where it comes from, but I don't know many of the sources and uses of it. Can you please help me??

Answer 4

It's used a lot in heavy-duty hand cleaners like Lava soap. Pumice is a gray, soft, very light volcanic rock. It's so light it will float. Sorry, but I'm not sure which parts of the world it comes from.

Answer 5

The main use now days is for stone washing denim. It's found near old volcanic formations.

Answer 6

I use it to rub off the crud ring in my toilet.