| US 7,578,207 B2 | ||
| Measuring apparatus and measuring method for concrete-forming materials | ||
| Shigeyuki Sogo, Kiyose (Japan); Ryuichi Chikamatsu, Kiyose (Japan); Koji Watanabe, Kiyose (Japan); and Hisayoshi Kikkawa, Natori (Japan) | ||
| Assigned to Obayashi Corporation, Osaka (Japan) | ||
| Filed on Feb. 26, 2007, as Appl. No. 11/710,516. | ||
| Application 11/710516 is a division of application No. 10/470044, granted, now 7,207,212, previously published as PCT/JP02/00447, filed on Jan. 23, 2002. | ||
| Claims priority of application No. 2001-024968 (JP), filed on Jan. 31, 2001; application No. 2001-026143 (JP), filed on Feb. 01, 2001; application No. 2001-036770 (JP), filed on Feb. 14, 2001; application No. 2001-049751 (JP), filed on Feb. 20, 2001; application No. 2001-062611 (JP), filed on Mar. 06, 2001; application No. 2001-062622 (JP), filed on Mar. 06, 2001; application No. 2001-062698 (JP), filed on Mar. 06, 2001; and application No. 2001-109466 (JP), filed on Apr. 09, 2001. | ||
| Prior Publication US 2007/0186697 A1, Aug. 16, 2007 | ||
| Int. Cl. G01G 9/00 (2006.01) | ||
| U.S. Cl. 73—865 | 60 Claims |
| 1. A measuring method of concrete materials, comprising the steps of:
throwing water and aggregate into a measurement tank having an opening for overflow formed thereon so that the aggregate is
submerged in the water as submergence aggregate and so that the water overflows from the opening for overflow;
measuring total mass Mf of the submergence aggregate; and
calculating mass Ma of the aggregate in a saturated surface-dried condition and mass Mw of the water from the fact that an internal volume at overflow from said measurement tank is equal to total volume Vf of the submergence aggregate by solving the following two formulas:
Ma+Mw=Mf (1)
Ma/ρa+Mw/ρw=Vf (2)
where ρa is a density of the aggregate in the saturated surface-dried condition and ρw is a density of the water.
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