Bridge with high-strength lightweight concrete slab

摘要

PROBLEM TO BE SOLVED: To make high-strength lightweight concrete floor slabs of the bridge floor of various kinds of bridges hardly being damaged or broken by wrecking heavy machinery during replacement work for the pavement of the concrete floor slab, thereby lengthening the life of the concrete floor slab and suppressing the progress of rusting of reinforcing steel bars and PC steel material inside the high-strength lightweight concrete floor slab. SOLUTION: Bridge floor of the bridge is constituted with a high-strength lightweight concrete floor slab 1 which is a cured, hardened body of hydraulic mixture of Portland cement, artificial lightweight coarse aggregate and artificial lightweight fine aggregate with a mix proportion ratio by weight of (9.5 to 10.5):(1.05 to 11.5):(11.5 to 12.5) and a polymer cement concrete layer having a thickness of 10 to 25 mm is adhered to the top surface of the pavement side of a precast prestressed concrete floor slab having a bulk density of 1.6 to 1.8 t/m3 after hardening.