| Summary: | 碩士 === 國立海洋大學 === 河海工程學系碩士在職專班 === 90 === The study is to investigate the placement and construction method of cellular concrete. The air content and cementitious materials varied in cellular concrete, which influences the unit weight , compressive strength, and placement procedure.
Test results indicate that the unit weight of cellular concrete was about 1/3~2/3 of that of normal concrete. When the air content is below 60%, the average void diameter is between 0.02 cm~0.03 cm, and the voids are distributed individually in concrete. The slump of celluar concrete can reach up to 27.5~28.8 cm with a slump flow up to 64~92 cm. After 45 minutes, there is almost no slump loss or slump flow loss.
The pouring height of cellular concrete significantly affects the unit weight , air content and compressive strength. When the pouring height increases, the air content in the bottom part will lose to 11~12%. For controlling the uniformity of cellular concrete, it is suggested to keep the pouring height below 0.5m or at most not greater than 1.0m.
|
|---|
