预拌商品混凝土经常出现混凝土初始坍落度可达到200mm、初始扩展度达到500mm,此时混凝土不泌水或略显泌水。但该混凝土送达工地或施工完后大约不到2个小时,混凝土出现大量的泌水现象,该泌水现象称之为混凝土滞后泌水。产生混凝土滞后泌水的原因由配比材料的综合因素引起,主要有如下几个方面及采取的预防措施。 Ready-mixed commercial concrete often appear initial slump of concrete up to 200mm, the initial expansion of 500mm, this time the concrete does not bleed or slightly bleeding. However, when the concrete is delivered to the site or about less than two hours after the construction is completed, a large amount of bleeding phenomenon occurs in the concrete, which is called as the lagging concrete bleeding. The reasons for the occurrence of concrete hysteresis bleeding caused by the combined factors of the proportion of materials, mainly in the following aspects and preventive measures taken.