摘要
多年来 ,人们在粉煤灰的掺量问题上一直持比较保守的态度。混凝土能否长期作为最主要的建筑材料 ,关键在于能否成为绿色材科 ,使之纳入可持续发展的轨道。针对我国国情 ,本文探讨了中等强度大掺量粉煤灰高性能混凝土的社会经济意义、工作性、力学性能及耐久性。在大量试验的基础上 ,对不同掺量粉煤灰高性能混凝土的坍落度损失、抗压强度、干缩以及耐久性等性能进行了全面的分析。研究表明 ,大掺量粉煤灰高性能混凝土在道路工程、大体积工程以及房建工程等方面有着广阔的应用前景。
? For so many years,people have been holding a quite conservative attitude towards the admixture amount of fly ash in concrete.Whether concrete can remain to be the most important building material over a long period of time depends critically on whether it is a green material and can be put on the right course of the sustaining project.In viewing the national conditions,the social and economic significance,workability,mechanical properties and durability of middle strength PFA high performance concrete of high replacement levels were investigated in this paper.Basing on many tests,we analyzed comprehensively the slump loss,compressive strength,drying shrinkage and durability of PFA high performance concrete.Results indicated that PFA high performance concrete of high replacement levels would have promising application prospects at many fields of highway,large volume concrete engineering as well as house building engineering. 〔
出处
《混凝土》
CAS
CSCD
北大核心
2000年第4期14-17,50,共5页
Concrete
关键词
粉煤灰混凝土
后期强度
耐久性
高性能混凝土
PFA concrete
fly ash composite ultra-fine powder
later-stage strength
slump loss
