桥梁混凝土结构工程.doc

SECTION 900 - CONCRETE WORKS 901 SCOPE OF SECTION 927 PRECAST REINFORCED CONCRETE STAIRS DOWN EMBANKMENT SIDE SLOPE AT END OF OVERPASS在立交桥末端沿路堤边坡预制钢筋混凝土阶梯 53 SCOPE OF SECTION章节范围 This section covers the materials, design of mixes, mixing, transport, placing, compaction and curing of concrete and mortar required in the Works. It also covers formwork and reinforcement for concrete. 本章节既包括工程中要求使用的材料，混合料设计，搅拌，运输，摊铺，压实和混凝土及砂浆的养护，还包括模板以及钢筋。 DEFINITIONS定义 Structural concrete is any class of concrete which is used in reinforced, prestressed or non-reinforced concrete construction, that is subject to stress. Non-structural concrete shall be Class B20. 结构混凝土是加固，预应力，或非钢筋混凝土结构（该结构承受压力）中所用的任何等级混凝土。非结构混凝土为等级 B20。 Non-structural concrete is composed of materials complying with this specification and is used only for filling voids, blinding foundations and similar purposes where it is not subjected to significant stress. 非结构混凝土由符合规范的材料组成，并且只用于填补空隙、填塞基础以及类似的不承受主要压力的地方。 A formed surface is a face that has been cast against formwork. 成型表面是指在模板上已经浇筑完成的面。 An unformed surface is a horizontal or nearly horizontal surface produced without using formwork. 未成型的表面是不使用模板而制造出来的水平或接近水平的表面。 A pour refers to the operation of placing concrete into any mould, bay or formwork, etc., and also to the volume that has to be filled. Pours in vertical succession are referred to as lifts. 浇筑是指结构物砼浇筑时任何形式砼的填筑。垂直作业的浇筑分层进行。 Falsework comprises the structural elements that initially support both the formwork and the placed concrete. 脚手架由结构部件组成，结构部件最初是用于支撑模板和已摊铺的砼。 Formwork is a structure, either temporary or permanent, provided to contain fresh concrete and support it in the required shape until it has hardened. 模板是一个用于容纳新混凝土，支撑新混凝土凝固成形的结构，模板包括临时性或永久性模板。 Consistence refers to fresh concrete’s resistance to flow and is most commonly measured by the slump test. Other methods of measuring consistence include the stiffness measuring apparatus. 稠度是指新混凝土的抗流动性，通常通过坍落试验测试。其它测量稠度的方法包括稳定性测量仪器。 MATERIALS