水工超高掺粉煤灰混凝土设计与试验研究  

Design of ultra-high fly ash content hydraulic concrete:experimental study

作　　者：周厚贵 张振宇 

机构地区：[1]中国能源建设集团有限公司,北京100022 [2]葛洲坝集团试验检测有限公司,湖北宜昌443002

出　　处：《水力发电学报》2017年第5期1-9,共9页Journal of Hydroelectric Engineering

基　　金：中国能源建设集团有限公司科技项目(CEEC12-KJ02);中国葛洲坝集团股份有限公司科技项目(2012KJ-03)

摘　　要：尽管目前水工高掺量粉煤灰混凝土的设计方法很多,但受已有的设计理念、设计方法及现行规范的限制和束缚,水工常态混凝土的粉煤灰掺量很难超过50%,这一状况就与国外形成了较大差距。本文介绍了一种水工超高掺粉煤灰混凝土配合比的设计新方法,采用以普通硅酸盐水泥+80%粉煤灰拌制的混凝土,其各项性能均达到水工混凝土C_(180)40要求,与采用普通方法设计的中热水泥+35%粉煤灰同强度等级混凝土相比,水化温升更低,干缩更小,抗裂性能更优,且总体成本更低,为水工混凝土进一步展现其完整含义,实现特征归真开辟了途径。Various design methods are available in China for ultra-high fly ash content hydraulic concrete, but the fly ash volume content in normal hydraulic concrete could hardly exceed 50% due to the restrictions of their design concept and methodology and the existing regulations, showing a significant difference from the current techniques overseas. This paper describes a new design method of mixing fly ash and ordinary portland cement that can raise the mix portion of fly ash up to 80% and retain all the performances meeting the requirement of hydraulic concrete C18040. Compared with the concrete with the same strength grade but a lower content 35% fly ash mixed with medium heat cement by the common method, this new design is superior in lower hydration temperature rise, less shrinkage, and lower total cost. Thus, it would provide a new method to demonstrate the integrated meanings and real characteristics of hydraulic concrete.

关 键 词：配合比 设计方法 粉煤灰 超高掺 水工混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]