集料中黏土质泥及其对混凝土性能的影响

混凝土是应用广泛的建筑材料,其中集料是混凝土的重要组成部分.目前集料生产状况表明其不可避免含泥.泥会对混凝土诸多性能产生影响,其中泥的重要组分黏土对混凝土性能产生的影响最大.本文介绍了泥的来源,代表性黏土矿物的结构与性质,含泥量和泥的矿物性质对混凝土工作性能、力学性能以及其它性能的影响,以及泥对水泥水化的影响,并对其原因进行一定程度的探讨.指出了泥应从矿物性质角度对其界定,这一界定对实际工作中集料含泥量的判定和泥对混凝土性能影响以及采取必要措施具有一定的参考价值.

Microfines in Aggregate and Its Influence on Concrete Performance

Aggregate is an important component of concrete which is widely used as building materials.Microfines is inevitable to present in aggregate because of produce technology.Microfines affect many properties of concrete and clay which is an important component of microfines has the largest influence on concrete.This paper introduces the source of the microfines,the mineral structure and properties of representative clay,the influence of content and mineral properties of microfines on workability,strength and other properties of concrete,and affect of microfines on cement hydration.The present paper points out that we should define microfines from mineral properties.It has certain reference value on judgment of microfines content in the practical work,on that microfines,influencing on concrete performance,and on adopting necessary measures to reduce the influence.