赵丽伟

摘要：高性能混凝土是一种新型高技术混凝土，是在大幅度提高普通混凝土性能的基础上采用现代混凝土技术制作的混凝土，是以耐久性为基本要求，在混凝土中掺入一定量的矿物掺和料和专用复合外加剂，取用较低的水胶比和较少的水泥用量，在施工时采取严格的质量控制措施，制备的满足力学性能要求，并具有较高的耐久性能和良好的工作性能的混凝土。高性能混凝土应具有良好的工作性能，不离析、不泌水、和易性好、流动好，有利于提高混凝土的外观质量。本文对高性能混凝土的施工质量控制进行了探讨，为其在施工过程中得到更好的应用提供了科学的依据。

关键词：高性能混凝土；耐久性；施工控制

中图分类号：TU198文献标识码： A 文章编号：

On the high performance concrete construction technology

Zhangliwei

(Qinhuangdao the traffic construction supervision god Co., LTD, Qinhuangdao 066000,China;)

Abstract: High performance concrete is a new kind of high technology of concrete, is greatly increase in ordinary concrete performance on the basis of modern concrete technology making concrete, is the basic requirements for durability, adding a certain amount of concrete in mineral materials and special mixed compound admixtures, take with low water-binder ratio and less cement contents, when construction adopt strict quality control measures, the preparation of mechanical performance meet the requirements, and has a high durability and good performance of concrete. High performance concrete should have good work performance, not segregation, not secrete water, and the gender is good, good flow, and to improve the appearance of the concrete quality. In this paper, the high performance concrete construction quality control, the paper discusses the in construction process for its better applied to provide the scientific basis.

Key words: High performance concrete; Durability; Construction control

混凝土的拌和

混凝土生产前，核对原材料的产地、规格，检查搅拌设备是否运行正常。并按每班抽测不少于2次，雨天随时抽测原则，准确测定粗、细骨料的含水率，掌握因天气变化等所引起的粗细骨料含水量变化，据此及时调整混凝土配合比，计算出施工配合比和搅拌机一次性投料数量。试验室按规定签发配合比施工通知单，严格按照施工配合比进行准确称量，其最大允许偏差符合下列规定（按重量计）：胶凝材料（水泥、矿物掺和料等）±1％；高性能混凝土用外加剂±1％；粗、细骨料±2％；拌合用水±1％。如果偏差过大，将会影响混凝土性能，如当水的计量偏差为±1%、±2%、±3%、±4%和±5%时，混凝土强度波动幅度分别为±3%、±6%、±9%、±12%和±15%，若用水量太大，就失却了高性能的实际意义，同时混凝土容易离析，用水量过少混凝土的工作性降低，流动性差，不便于施工。……