摘要
针对目前国内外对不同类型及含量矿物掺合料对高性能混凝土抗压强度随时间变化的规律研究较少的情况,文章设计了13组混凝土试件,分别研究不同含量的粉煤灰、矿渣粉、石灰粉以及双掺粉煤灰和矿渣粉在不同龄期对高性能混凝土抗压强度的影响规律。结果表明:掺入粉煤灰会对混凝土早期的抗压强度发展产生不良影响,掺入矿渣粉可大幅提高混凝土的后期强度;双掺矿渣粉和粉煤灰会导致前期混凝土抗压强度显著下降,但后期其抗压强度会显著提高;石灰石粉作为一种惰性材料会降低混凝土强度,且掺量越高,降幅越大。
The change law of different types and contents of mineral admixture on the compressive strength of high performance concrete over time is studied rarely at home and abroad currently.13 groups of concrete samples are designed in the paper.The influence law of different contents of fly ash,slag powder,lime powder,double mixing fly ash and slag powders on the compressive strength of high performance concrete in different ages is studied.The results show that the addition of fly ash has a negative effect on the early compressive strength development of concrete,and the addition of slag powder can greatly improve the late strength of concrete.The compressive strength of concrete in the early stage can be significantly decreased by double mixing of slag powder and fly ash,but a significant increase is caused in the later stage.Limestone powder can be used for reducing the strength of concrete as an inert material,and the content is higher,the decline is greater.
作者
赵立刚
ZHAO Ligang(China Railway 18 Bureau Group Municipal Engineering Co.,Ltd.,Tianjin 300000,China)
出处
《中国水能及电气化》
2021年第4期38-41,50,共5页
China Water Power & Electrification
关键词
高性能混凝土
配合比
抗压强度
矿物掺合料
high performance concrete
mixture ratio
compressive strength
mineral admixtures
