Title:
CONCRETE BLOCK FOR PAVEMENT AND PAVEMENT STRUCTURE
Document Type and Number:
Japanese Patent JP2021161728
Kind Code:
A
Abstract:
To provide a concrete block for pavement and a pavement structure that are less likely to cause wear, chipping, and cracking of individual blocks, and are less likely to cause steps, subsidence, horizontal movement (misalignment), and rutting on an entire road surface, can maintain good road surface properties for a long period of time, and can suppress the running noise of a vehicle.SOLUTION: A cement composition comprises: a cement and powder containing a filler having an average particle size of 1/50 or more and 1/5 or less of the average particle size of the cement particles; a fine aggregate; a coarse aggregate; and water. The mass ratio of the water to the cement is 0.28 or less. A concrete block for pavement is a regular hexagon having a plane shape of an upper end surface of 50 mm or more and 380 mm or less on a side, and a prismatic shape having a thickness of 50 mm or more and 300 mm or less. The concrete block for pavement is chamfered 4 mm or more and 20 mm or less in a depth direction, 2 mm or more and 20 mm or less in a direction of the upper end surface perpendicular to the side and the depth direction, and 2 mm or more and 30 mm or less in a corner part of the upper end surface.SELECTED DRAWING: Figure 3
Inventors:
YAGINUMA HIROSHI
TSUJI MASAAKI
KONO ASAKO
TSUJI MASAAKI
KONO ASAKO
Application Number:
JP2020063814A
Publication Date:
October 11, 2021
Filing Date:
March 31, 2020
Export Citation:
Assignee:
TAIHEIYO PRECAST CONCRETE IND CO LTD
International Classes:
C04B28/02; E01C5/06; E01C7/14; E01C7/18; E01C9/00
Attorney, Agent or Firm:
Takeo Fukuchi
Yoichi Shirakawa
Ryuichi Hayakawa
Yoichi Shirakawa
Ryuichi Hayakawa