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首页> 外文期刊>PCI journal >Development of the Concrete Technology for a Precast Prestressed Concrete Segmental Bridge
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Development of the Concrete Technology for a Precast Prestressed Concrete Segmental Bridge

机译:预制预应力混凝土分段桥混凝土技术的发展

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align="left">A laboratory study to establish the concrete requirements for the Linn Cove Viaduct in North Carolina was undertaken for the contractor. This multispan precast prestressed segmental bridge is being? built by the? progressive placing method. The investigations? conformed to the project specifications and to special requirements desired by the contractor. The laboratory work included petrographic studies and physical tests on different aggregates, concrete mix proportioning studies using conventional and high-range water reducers, accelerated heat-curing studies, creep and drying shrinkage tests,? the development of field mix proportions, and preparation of a quality control procedural manual. A unique aspect of the project was the use of a volumetric mixing mobile at the site instead of a conventional?? batching and mixing facility.
机译:align =“ left”>为承包商进行了一项实验室研究,以确定北卡罗来纳州Linn Cove高架桥的具体要求。这座多跨度预制预应力节段桥正在被使用吗?建的?渐进式放置方法。调查?符合项目规格和承包商要求的特殊要求。实验室工作包括对不同骨料的岩石学研究和物理测试,使用常规减水剂和高范围减水剂的混凝土配合比研究,加速热固化研究,蠕变和干燥收缩率测试?开发田间混合比例,并准备质量控制程序手册。该项目的一个独特方面是在现场使用容积混合移动设备,而不是传统的?配料和搅拌设备。

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