摘要
基于通用旋转组合设计,研究了水胶比、矿粉掺量、CPA掺量、粉煤灰掺量等因素对海工混凝土性能的影响,得到配合比参数对28d龄期混凝土氯离子扩散系数和混凝土抗压强度影响的响应模型。在试验水平为-1.682≤x≤1.682时,28d混凝土氯离子扩散系数随着水胶比、矿粉掺量、CPA掺量、粉煤灰、的增大,分别呈现出缓慢增大和逐渐降低、先降后升、先降后升的趋势。而在混凝土28d抗压强度方面,随着水胶比、矿粉掺量、CPA掺量、粉煤灰掺量的增大,分别呈现出逐渐降低的趋势、先增后减、先减后增,先增后减的趋势。针对工程对混凝土性能的要求,并引入经济性指标,提出不同部位的混凝土配合比方案。
Based on the general rotating combination design, the effects of water-binder ratio, fly ash, mineral powder admixture, CPA on the performances of marine concrete were studied. Response model for the effects of mix ratio parameters on diffusion coefficient and concrete compressive strength were obtained. When the test level was between-1.682 and 1.682, with the increase of water-binder ratio and mineral powder content, the chloride ion diffusion coefficient of concrete at the age of 28d showed a slow increase and a gradual decrease, respectively. Meanwhile with the increase of fly ash and CPA content, the chloride ion diffusion coefficient of 28d concrete showed a trend of first decreasing and then increasing. In terms of concrete compressive strength, with the increase of water-binder ratio and CPA content, the 28d concrete compressive strength showed a trend of gradually decreasing, first decreasing and then increasing. With the increase of mineral powder content, the compressive strength of 28d concrete showed a trend of first increasing and then decreasing. According to the requirements of the concrete performance for the project, and introducing economic indicators, the concrete mix ratio for different parts of the structure were proposed.
作者
安邦
赵家琦
丁平祥
方翔
AN Bang;ZHAO Jiaqi;DING Pingxiang;FANG Xiang(Road&Bridge South China Engineering Co.,Ltd.,Zhongshan 528400,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China;Key Laboratory of Durability Technology for Harbor and Marine Structure Ministry of Communications,PRC,Guangzhou 510230,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期1119-1124,共6页
Building Structure
基金
广东省重点领域研发计划项目(2019B111106002)
关键词
通用旋转组合设计
混凝土配合比
氯离子扩散系数
抗压强度
general rotating combination design
concrete mix ratio
chloride ion diffusion coefficient
compressive strength
