limestone
Limestone is one of the few mineral resources that is 100% self-sufficient in Japan, and is used in various industrial fields such as cement, concrete, steel, and chemicals, and is a promising and important resource for the future. We sell and transport lime sand and crushed limestone. In recent years, there has been a shortage of raw materials such as sand and crushed stone.

Main uses of limestone
・Ready concrete aggregate・Cement raw material
・Auxiliary raw materials for steel・Soil improvement material
・Water treatment・Food
・Agriculture and livestock ・Pollution prevention
etc. are used in various places.

Advantages of using lime sand/crushed limestone for ready-mixed concrete
・Alkaline aggregate reactivity: It is safe because there is no risk of alkali-silica reaction, which greatly impairs the durability of harmless concrete.
・Compared to other minerals with low drying shrinkage, the amount of shrinkage of concrete structures is very small due to the large elastic modulus.
– Little variation in kneading amount. If all aggregates are made of limestone, the density will be the same in all particle size ranges, so the variation in kneading amount will be very small and volume management will be easy.
・Improve recyclability. Concrete structures that use limestone as all aggregates have a very high possibility that the framework itself can be reused as limestone resources in the future.