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石灰石粉在水泥基材料中的作用及对其耐久性的影响
作者:史才军 王德辉 贾煌飞 刘剑辉 
单位:湖南大学土木工程学院 长沙 410082 
关键词:水泥基材料 石灰石粉 作用机理 耐久性 
分类号:TQ172
出版年,卷(期):页码:2017,45(11):0-0
DOI:
摘要:

 作为水泥基材料的矿物掺合料,石灰石粉对它的凝结硬化、微观结构和耐久性能会有显著影响。本文概述了石灰石粉在水泥基材料中的4 个作用:晶核、填充、化学和稀释作用。在一定的掺量范围内,石灰石粉的粒径越小或者掺量越大,能加速硅酸盐水泥的水化、改善孔结构和硬化水泥浆体的界面,从而提高基体性能。当石灰石粉粒径较大或者掺量过多时,石灰石粉反而起稀释作用,降低基体性能。然后基于石灰石粉的四个作用机理,综述了其对水泥基材料渗透性、碳化性能、硫酸盐腐蚀、抗冻性、钢筋锈蚀的影响。最后对掺石灰石粉水泥基材料的进一步研究工作提出了建议。

 Limestone powder (LP), as a supplementary cementitious material (SCM), can have a certain influence on the hydration, microstructure and durability of cement-based materials. This paper reviewed the action mechanism of limestone power in

cement-based materials (i.e., nucleation effect, filler effect, dilution effect and chemical effect). LP accelerates the hydration reaction, improves the pore structure and ITZ, and enhances the properties of cement-based materials. Instead, LP with larger sizes or excessive additions shows a dilution effect on the properties of cementitious materials. Moreover, this paper also represented the four action mechanisms of LP for the durability properties, i.e., permeability, carbonation resistance, sulfate corrosion, frost resistance and reinforcement corrosion. In addition, further researches on the addition of limestone power into cement-based materials were also proposed.
基金项目:
青年科学基金项目(51608187)。
作者简介:
史才军(1964—),博士,教授。
参考文献:
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