Experimental Study on Segregated Layers of Materials and Compressive Strength of Concrete for Pretensioned Spun High Strength Concrete Pile ;;;;
Pretensioned spun high strength concrete (PHC) pile has to be quality-controlled and provided an adequate concrete cover to assure high load carrying capacity, impact resistance, economy, and durability. During spun pre-casting, the pile section is divided into several segregated layers such as laitance, paste, mortar, and concrete layers. Greater the thickness of segregated layers, more difficult it is to guarantee the capacity and the durability of PHC pile. The experimental study was performed to investigate the effects of centrifugal condition on the segregated layers of materials and the compressive strength of concrete for PHC pile. The considering factors in the test were centrifugal time and magnitude of centrifugal force. These factors have been found to have greater influence on the segregation than the concrete strength. The moderate centrifugal condition has to be considered to maintain quality assurance in the production of PHC pile, especially to provide the adequate concrete cover over its tendons.
한국공업규격 KS F 4036 (프리텐션 방식 원심력 고강도 콘크리트말뚝), 0000.
한국공업규격 KS F 4403 (원심력 철근 콘크리트관), 0000.
한국공업규격 KS F 2454 (원심력으로 다져진 콘크리트의 압축강도 시험방법), 0000.