建筑石膏缓凝剂的研究

通常缓凝剂虽能延长建筑石膏的凝结时间但也大大降低了建筑石膏硬化体的强度．本文介绍一种新型缓凝剂（代号L），不仅能够有效的延长建筑石膏的水化时间，而且对石膏硬化体的强度几乎无不良影响．文中对缓凝剂的作用机理及其对石膏浆体水化、硬化过程的影响进行了探讨．

Studies on retarder for calcined-gypsum

Usually a rctarder prolongs the setting time of calcined-gypsum but it alsoreduces the strength of plaster This paper introduces a new retarder (Retarder L )which not only can effectively prolong the setting time of caIcined-gypsum but also hasno bad influence on the strength of the hardened palster. At the same time, this paperinquired into the slow setting mechanism of the Retarder L as well as the processes inwhich the Retarder L exerts influence on the hydration and hardening of plaster paste.