| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of effectively increasing bending strength and compressive strength of a structural body having durability by limiting a cost to the minimum and solving such a problem that the durability of the structural body is greatly reduced by metal corrosion resulting from water content or the like when bending strength and compressive strength of a concrete and a cement or both structural bodies are increased by a metal bar. SOLUTION: The structural body can be obtained by hardening the concrete and the cement after a resin molded piece 12 having a steel pipe 11 inside of one of them and integrally forming the circumference of a resin component has been inserted in at least a sort selected from both concrete and cement. |
