Performance criteria and parameters of decorative gravels

Cobblestone performance criteria and parameters. Nanjing cobblestone physical parameters, decorative gravels ,material, 95% silica (SiO2) performance parameters, surface finish 98%, compressive strength 600 Kg / M2 or more.

Cobblestone natural pebbles, pebbles machinery, artificial pebbles, glowing rocks , wide variety, everything various particle sizes, adequate supply, affordable, reliable, rest assured your choice!

The composition of pebbles of decorative gravels and its performance

Originally, thick and big rocks, but after millions of years of rain erosion and each other between collide, decorative gravels became the pebbles in the dolphin rounded plain and simple and honest.

Cobblestone main chemical compositions are silica, followed by small amounts of iron and trace amounts of manganese, copper, aluminum, magnesium and other elements and compounds.

They themselves with different colors, such as red as the iron, the blue copper, purple for manganese, translucent yellow for silica gel chalcedony, jade color with green mineral and so on, glow in the dark stone due to the different kinds and contents of these pigment ions dissolved silica hydrothermal, thus showing the depth of shade, the changing color pebbles show black, white, yellow, red, green, green color.

The formation process and causes of decorative gravels，pebble

Pebble formation process can be divided into two stages. The first stage is the weathering of rocks, decorative gravels ,landslides stage; the second stage is a rock in the river by river transport and the grinding stage.

Containing pebbles of gravel, which was caused by broken rock, only long distance transport away the edges and corners, forming a circular or oval stones (or pebbles, gravel), decorative aggregate , then the cementation of rock known as the gravel.

What is the formation of pebbles of decorative gravels

About 100 million years ago in the Mesozoic, the role of movement in the crust, the magma emitting surface, glow in the dark stone , rapid cooling of the magma is formed of granite. After thousands of years ago, due to the granite magma intrusion caused dislocation extrusion, resulting in a large number of smaller stones, those stones at the water's edge, decorative aggregate after each rolling long period of slow water erosion and the formation of today's final, pebbles.