| Title |
Influence of Unit Water Content on the Durability and Properties of Fresh Concrete |
| Authors |
Han Cheon-Goo ; Hwang Yin-Seong ; Kim Kwang Soe ; Kim Young Deuk |
| Keywords |
Unit Water Content ; Fluidity ; Durability ; Drying Shrinkage ; Neutralization ; Resistance of Freezing and Thawing |
| Abstract |
As the durability of concrete tend to be regarded as important, the influence of water content on the durability and quality of concrete become a great concern. For that reason, this study is intended to investigate the influence of water content on the durability and the quality of concrete. According to the results, with an increase of water content, fluidity of fresh concrete increases but air content decreases. When water content is above 180kg/m3, bleeding occurs drastically at early age. As the properties of hardened concrete, compressive strength makes no difference with variation of water content. Length change ratio shows an increasing tendency with an increase of water content. As W/C decreases, neutralization of concrete is slackened due to dense organization, and is accelerated in order of upper, side and lower surface. As W/C decreases, it is also influenced much by an increase of water content. Resistance of freezing and thawing is favorable with an decrease of W/C, and is not influenced by water content. |