| 摘要 |
PROBLEM TO BE SOLVED: To produce ultra-lightweight aggregate concrete by preventing ultra- lightweight aggregate from excessively absorbing water, holding ultra-lightweight properties, and stabilized in quality. SOLUTION: A method for producing ultra-lightweight aggregate concrete is constituted of test stages (1)-(6) of a front process measuring the supply amt. of water to ultra-lightweight aggregate in an absolute dry state by a water absorbing test and calculating the max. value of the correction amt. of water added to kneading water and performing the trial kneading of ultra-lightweight aggregate concrete compounded with a predetermined amt. of the aggregate to determine the suitable value of the correction amt. of water added to the kneading water and further determining the suitable charging amt. of the kneading water therefrom and production stages (7)-(9) of a rear process immersing the compounded aggregate in an absolute dry state in a part of the suitable charging amt. of kneading water or introducing the same into a mixer and charging a part of kneading water to perform stirring or preliminarily infiltrating a part of kneading water into the aggregate to bring the aggregate to a stable low hydrated state after the elapse of a predetermined time and charging the remainder of kneading water and all of compounding materials to perform final kneading to produce ultra-lightweight aggregate concrete. |
