Other

Taisei Corporation

Yutaka Mochida

Yasuro Ito

Yasuhiro Yamamoto

Hideharu Kaga

Yoshiro Higuchi

Tadayuki Sumita

Sampei Kemmochi

A green concrete mortar is prepared by the steps of preparing a first composition in which water is uniformly deposited about the particles of sand, preparing a second composition consisting of a powder of cement, mixing together the first and second compositions, thus forming stable shells about the particles of the sand, the shells having substantially a constant ratio of water to cement, and adding water to the shelled sand and then kneading the resulting mixture. The green concrete mortar can be poured into a moulding frame prepacked with a coarse aggregate i.e. gravel. After incorporating gravel into the mortar, the resulting green concrete can be moulded or blasted. The green concrete can be readily conveyed to a working station for constructing tunnels, buildings or the like.

Method of preparing green compositions containing a hydraulic substance

A slurry shaped freshly mixed fluid compound such as paste or mortar and coarse or fine aggregate are conveyed under pressure through discrete conduits and then mixed together substantially immediately before blasting. The mixture is blasted through a nozzle against a body to be covered with concrete.

Method of blasting concrete

Growing community of inventors

Hakodate, Japan

Yutaka Mochida