| 摘要 |
PROBLEM TO BE SOLVED: To provide an embedded expansion device that can effectively prevent the cracking due to rotational displacement and vertical displacement caused in the end of a floor slab.SOLUTION: An embedded joint 1 includes: a 3-layer sheet structure 6 continuously disposed on a joint gap 3 and opposed floor slabs 2, 2; a reinforcing sheet 7; a base layer 8 continuously laid on a floor slab 2, 2, the 3-layer sheet structure 6 and the reinforcing sheet 7, and formed of a crushed stone mastic asphalt mixture; and a surface layer 9 laid on the base layer 8 and formed of the asphalt mixture. The aggregate of the crushed stone mastic asphalt mixture has a gap particle size distribution. The asphalt composition of the crushed stone mastic asphalt mixture is formed by containing asphalt, a thermoplastic elastomer, a process oil and a ductile material, where the viscosity in 60°C is 1,000 Pa/s or more and 30,000 Pa/s or less, and the bending strain in -10°C is 180×10or more and 500×10or less. |
