论文部分内容阅读
混凝土施工作业中干热的气候条件会带来一些特殊的问题,其中有:要耗用更多拌和用水;浇筑层和仓面快速干燥的结果造成强度的损失和出现裂缝;没待充分拌和就在固结了;以及混凝土的快干造成抹面困难。美国纽约混凝土建筑协会执行委员会主任,雷蒙特C·亥恩,通过以下预防措施可将干热气候条件给混凝土施工带来的一些问题,缩减到最小程度。▲改进施工进度的方案供潮湿木模、罐笼表层和养护的生产用水要能充分供应就必须备有充分的材料和设备,要使混凝土的浇捣不受耽误,施工安排中应考虑使用一些缓凝剂。
The dry and hot climatic conditions in concrete construction operations will bring about some special problems, among which are: to consume more mixing water; the rapid drying of the pouring layer and the warehouse surface results in loss of strength and cracks; not to be fully mixed Consolidated; and the quick-drying of the concrete caused the difficulty of wiping. Remont C. Heinen, Director of the Executive Committee of the New York Concrete Building Association, USA, can minimize the problems caused by dry and hot climate conditions to concrete construction through the following preventive measures. ▲The scheme for improving the construction schedule shall provide sufficient materials and equipment for the full supply of the production water for damp wood formwork, cage surface and maintenance. To prevent the concrete from pouring, the construction arrangement should consider the use of some relief. Coagulant.