预防泵送砼裂缝的理论及其施工技术的研究(下)

砼结构裂缝是目前国内外难于解决的技术问题,为此通过以前工程的调研,总结一套施工方法经现场应用验证,取得较好成果。为了便于交流,本文着重介绍采用目前裂缝较严重的泵送混凝土,施工25万平米各种建筑功能的梁、柱、板结构没有出现早期和后期裂缝的理论基础及施工技术。

Study on theoretical foundation and construction technology of concrete structure crack resistance

The cracking of concrete structures, especially floors, can still not be fully avoided over the world. By engineering investigation, analysis and in situ tests, the outcome obtained is satisfied. The authors introduce the theoretical foundation and construction technology , wih which the early - age cracks and the late - age cracks of a 250,000m2 frame structure including beams, columns and floors using pumping concrete, are not appeared.