摘要
结合已有大型自密实清水混凝土工程,从原材料、配合比、施工工艺和模板等影响因素方面,综述了国内外清水混凝土的配制方法与控制技术,分析了清水混凝土表面缺陷及形成机理,提出了清水混凝土配合比参数、控制技术和研究展望。进一步改善自密实清水混凝土表面性能关键技术为:在严格控制原材料性能的基础上,优化自密实清水混凝土配合比,控制其黏度低于80Pa·s,并防止离析泌水;采用辅助振捣以排除清水混凝土表层气泡;选用清水混凝土专用模板和满足性能要求的脱模剂,宜采用树脂类脱模剂。
Combined with the existing large self-compacting and fair-faced concrete engineering, from the aspects of raw materials, mix proportion, construction technology and template, the preparation method and control technology at home and abroad of concrete are summarized, and the surface defects and formation mechanism are analyzed. The mix proportion parameters, control technology and research prospect of fair-faced concrete are put forward. The key technology to improve the surface performance of self compacting and fair-faced concrete is that based on the strict control of raw materials, to optimize the self compacting concrete mix ratio, control the viscosity of less than 80Pa.s, and to prevent bleeding and segregation. And the auxiliary vibration is used to eliminate concrete surface bubbles, the special formwork concrete is selected and the demoulding agent which can satisfy the performance requirements is selected, while the resin release agent is appropriate.
出处
《混凝土与水泥制品》
2017年第4期27-31,共5页
China Concrete and Cement Products
关键词
清水混凝土
自密实
表面缺陷
影响因素
关键技术
脱模剂
Fair-faced concrete
Self-compacting
Surface defect
Effecting factor
Key technology
Demoulding agent
