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Lava Rock / Volcanic Rock / Pumice Stone

Type

Red Lava Rock

Brown mixing black Lava Rock

Off-white pumice stone

Size

Off-white pumice stone:325mesh,200mesh,100mesh,1-3mm,3-5mm, 5-10cm etc.

Red color and black color lava rock: 1-3mm,4-8mm,10-30mm, 30-50mm,50-100mm etc.


Bulk Density

650-850KG/M3 for red color

550-750KG/M3 for black color

450-600KG/M3 for off-white pumice stone

Detailed Introduction

Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser.

 

Properties

Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. It is commonly but not exclusively of silicic or felsic to intermediate in composition (e.g., rhyolitic, dacitic, andesite, pantellerite, phonolite, trachyte), but basaltic and other compositions are known. Pumice is commonly pale in color, ranging from white, cream, blue or grey, to green-brown or black. It forms when volcanic gases exsolving from viscous magma form bubbles that remain within the viscous magma as it cools to glass. Pumice is a common product of explosive eruptions (plinian and ignimbrite-forming) and commonly forms zones in upper parts of silicic lavas. Pumice has a porosity of 64–85% by volume and it floats on water, possibly for years, until it is eventually waterlogged and sinks.

 

Uses

Pumice is a very light weight, porous and abrasive material and it has been used for centuries in the construction and beauty industry as well as in early medicine. It is also used as an abrasive, especially in polishes, pencil erasers, and the production of stone-washed jeans. Pumice was also used in the early book making industry to prepare parchment paper and leather bindings. There is high demand for pumice, particularly for water filtration, chemical spill containment, cement manufacturing, horticulture and increasingly for the pet industry.

 

A good soil requires sufficient water and nutrient loading as well as little compaction to allow easy exchange of gases. The roots of plants require continuous transportation of carbon dioxide and oxygen to and from the surface. Pumice improves the quality of soil because of its porous properties, water and gases can be transported easily through the pores and nutrients can be stored in the microscopic holes. Pumice rock fragments are inorganic therefore no decomposition and little compaction occurs. Another benefit of this inorganic rock is that it does not attract or host fungi or insects. 

 

 


Brief introduction

Lava stone, also known as pumice stone/rock, its bulk density is around 0.4-0.8g/cc, a porous light emission of acidic volcanic rocks glass. It is characterized by light weight, high strength, acid resistance, corrosion resistance, and non-polluting, non-radioactive and so on. It’s an ideal natural, green, environmentally products.

Pumice is widely used in architecture, landscape, horticulture, textile and other industries. Pumice stone series products, such as hollow brick blocks, grinding stone feet, light aggregate, of products from basic building materials into the series.


Packing

In 20kg,25kg pp bags or in 500-1000kg jumbo bags.


Application

Off-white pumice is widely used in textile,bath,abrasive materials etc.

Brown, red and black pumice is widely used in landscapes, horticulture,architecture,sewage treatment etc.

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