Patent ID: 7000458

Claim:
A measuring apparatus for concrete materials, comprising: aggregate feed means for feeding aggregate; water supply means; an aggregate measuring bin for storing and measuring aggregate supplied from said aggregate feed means; a measuring tank for storing aggregate supplied from said aggregate feed means as water-immersed aggregate together with water supplied from said water supply means, with a bottom lid capable of maintaining water tightness attached at a bottom opening in such a way as to be free to open or close; water-immersed aggregate mass measuring means for measuring mass of water-immersed aggregate in said measuring tank; water level measuring means for measuring a water level of the water-immersed aggregate in said measuring tank; and water level holding means for absorbing water exceeding a desired water level from said measuring tank to hold the desired water level of the water-immersed aggregate in said measuring tank and for measuring an amount of the absorbed water, wherein the water level holding means comprises a suction pipe placed so as to move up and down freely, an absorbed water measuring storage tank, which is connected so as to communicate with the suction pipe, for measuring the absorbed water, and suction means connected so as to communicate with the absorbed water measuring storage tank; and wherein said aggregate feed means can feed the aggregate to said aggregate measuring bin and said measuring tank.