路用泡沫混凝土长期耐久性研究

关键字：泡沫混凝土；耐久性；循环荷载；冻融循环

（浙江交工宏途交通建设有限公司，浙江 杭州  310051）

    摘要：随着高速公路建设的飞速发展，泡沫混凝土越来越频繁地用于公路工程领域。泡沫混凝土是一种轻质材料，多应用于桥台台背回填、路堤边坡置换等分项工程，由于其材料的特殊性，在控制路基沉降方面有着天然的优势。针对路用泡沫混凝土长期耐久性进行研究，在循环荷载和冻融循环单一因素和多因素耦合作用下，得出了泡沫混凝土微裂缝的变化规律，其力学性能均有不同程度的下降。可为类似项目的施工提供参考和借鉴。

    关键词：泡沫混凝土；耐久性；循环荷载；冻融循环

    中图分类号：TU528.2        文献标识码：A        文章编号：1001-702X（2018）07-0033-04

 

Study on long term durability of road foam concrete

CHEN Pinming，ZENG Rong，BIAN Shaoyang，CHEN Feng

（Zhejiang Jiaogong Hongtu Transportation Construction Co. Ltd.，Hangzhou 310051，China）

    Abstract：With the rapid development of highway construction in China，foam concrete appears more and more frequently in the field of highway engineering. Foamed concrete is a kind of lightweight material，which is mostly used in embankment backfill，embankment slope replacement and other sub-projects. Because of its particularity，it has a natural advantage in controlling subgrade settlement. In this paper，the long-term durability of foamed concrete for road is studied. Under the condition of single factor and multi-factor coupling of cyclic load and freeze-thaw cycle，the variation and evolution law of micro-crack of foamed concrete is obtained，and the mechanical properties of foamed concrete decrease in varying degrees. It can provide basis and reference for the construction of similar projects.

    Key words：foam concrete，durability，cyclic loading，freeze-thaw cycles