An Experimental Study on the Engineering Properties of High Strength Flowing Concrete Using Flyash and Silicafume (Part I. Workability of Fresh Concrete)

플라이애시 및 실리카흄을 사용한 고강도유동화콘크리트의 공학적 특성에 관한 실험적 연구 (제1보, 아직 굳지않은 콘크리트의 시공성 검토)

Production of high strength concrete requires a low water-cement ratio and this leads to the high cement content. Mineral admixture like fly ash(FA) is often cheaper than ordinary portland cement(OPC) and this factor in combination with possible improvement in workability and moderation of the heat evolution of the cement-rich mixes tends to encourage its use. The other mineral admixture that its use has been widly advocated is silica fume that increases compressive strength due to its pozzolanic reaction. The objective of this study is to assess the contribution of mineral admixtures(FA, SF) to the workability and the strength of concrete with low water-binder ratios. In this experimental study that investigates and analyzes the properties of fresh concrete, it is presented that using admixtures like flysh and silica fume as binding material increases properties of high strength flowing concrete having very low water cementitious ratios of 0.25 and 0.30.