What is the characteristic of basalt?
Basalts are very durable, jointed, and the joints are mostly hexagonal (in the basalt lava flow, the vertical condensation of rocks often develop into regular hexagonal columnar joints) and brittle, and thus difficult to take large pieces of stone, As the pores and almond structure common, although the basaltic surface is widely distributed, but can be made no small stone.
The bulk density of basalt is 2.3.3g / cm3, and its compact structure has a large compressive strength of 300MPa or even higher, but if the crystal impurity and porosity are used, the strength will decrease.
Basalt (Basalt) is a basic spouting rock, volcanic eruption from the surface of the magma solidified after the solidification of a dense or foam-like structure of the rock, belonging to the magma rock.The rock structure is often stomatal, Almond-like structures and plaque structures, sometimes with large mineral crystals, unweathered basalts are mainly black and gray, there are dark brown, dark purple and gray green.
