To provide lightweight concrete having mass of unit volume of 1,800-2,000 kg/m3 with high performance at a low cost, which is especially suitable for structural constructions such as railway bridges, road bridges, etc.
For lightweight concrete manufactured by mixing at least cement, fine and coarse aggregates, and water and hardening, artificial lightweight aggregate with specific gravity in absolute dry condition of 0.7-1.0 and water absorption of ≤5.0%, which is determined by JIS A1135 'Methods of test for particle density and water absorption of lightweight coarse aggregates for structural concrete', and crushed stone which meets JIS A5005 'Crushed stone and manufactured sand for concrete' are mixed at volume ratio of artificial lightweight aggregate to crushed stone of 9:1 to 6:4 and used as coarse aggregate.
| JP2023095802 | COLD SHRINK-PROOF CEMENT MORTAR MATERIAL |
| JP2004210574 | HEAVYWEIGHT CONCRETE |
| WO/2017/179122 | CEMENT ADDITIVE AND CEMENT COMPOSITION |
ISHIKAWA YUKO
KODAMA AKIHIKO
MORI HIROAKI
OBATA HIROYUKI
