Indonesia is one of the fast-growing economies in Southeast Asia, and has been implementing various infrastructure construction and attracting a lot of investment projects. Large amount of building materials, like sand, aggregates, stone base, are needed. The clients in Indonesia mainly use andesite, river stone/cobblestones to produce the aggregates. For example, in Kalimantan, andesite is the typical rock for crushing to use as concrete aggregate, road construction, etc. Its hardness is 5~6 mohs’.

Andesite is a kind of calcium-alkaline extrusive rock. It is similar to diorite. Most of the elements is feldspar, mica, or quartz. Its application is extensive, commonly used for sand, aggregates. Nowadays, so many countries invest an enormous amount in the high-speed railway, highway and other infrastructure construction, it is very great opportunity for the areas where have the rich reserve of andesite.