| 摘要 |
A method for the treatment of expanded plastic particles for admixture in lightweight concrete. The treatment is characterized in that monoethylene glycol monopropyl ether diethylene glycol monopropyl ether, monopropylene glycol monopropyl ether, dipropylene glycol monopropyl ether, monoethylene glycol monobutyl ether, diethylene glycol monobutyl ether, monopropylene glycol monobutyl ether, dipropylene glycol monobutyl ether, isomers or mixtures thereof, corresponding to 0.2 - 20 l/m<3> completed lightweight concrete, preferably 1 - 8 l/m<3>, is applied on the expanded plastic particles, e.g. by spraying. The treatment with chemicals has several functions, whereof the most important ones are to facilitate the mixing of expanded plastic particles, cement and water into a homogenous mass due to the surface activity effect, to reduce the shrinkage of the material during the drying process, and in case the expanded plastic particles are distributed with dry cement applied on their surfaces, also to bind the cement to the expanded plastic particles during transportation and storage. |
