Effect of shrinkage reduction admixtures on the pore structure properties of mortars

被引：0
作者：
A. B. Ribeiro
A. Gonçalves
A. Carrajola
机构：
[1] LNEC,
来源：
Materials and Structures | 2006年 / 39卷
关键词：
Shrinkage; Ettringite; Oxygen Permeability; Disjoin Pressure; Capillary Suction;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In order to reduce the shrinkage of concrete, which can cause cracks on structural or non-structural elements, the addition of a shrinkage reducing admixture (SRA) in concrete mixtures is one of the techniques that can be used. The decrease of shrinkage due to SRA is attributed to the reduction of the surface tension of the pore water. This study analyses the changes on the capillary suction and the oxygen permeability of mortar mixtures with and without SRA. This indicates that the addition of a SRA causes another physical effect on the porous structure, which can also affect the shrinkage of concrete.
引用
收藏
页码：179 / 187
页数：8
相关论文
共 17 条
  • [1] Nagataki S(1998)Expansive admixtures (mainly ettringite) Cement and concrete composites 20 163-170
  • [2] Gomi H(1994)Microstructure of highly expansive cement pastes ACI Materials Journal 91 46-53
  • [3] Fu Y(1991)Procedure for mixture proportioning of type-K expansive cement blends for use in shrinkage-compensating mortars ACI Materials Journal 88 536-543
  • [4] Sheikh SA(2001)Shrinkage-reducing admixtures and early age desiccation in cement pastes and mortars Cement and Concrete Research 31 1075-1085
  • [5] Hooton RD(1992)Effects of shrinkage-reducing admixtures on restrained shrinkage cracking of concrete ACI Materials Journal 89 289-295
  • [6] Olek J(1997)Properties of high-performance concrete containing shrinkage-reducing admixture Cement and Concrete Research 27 1357-1364
  • [7] Cohen MD(2004)Swelling, shrinkage and creep: a mechanical approach to cement hydration Materials and Structures 37 237-243
  • [8] Bentz D(1989)The determination of permeability of concrete by Cembureau method: A recommendation Materials and Structures 22 225-230
  • [9] Geiker M(1999)Permeability of concrete as a criterion of its durability Materials and Structures 32 174-179
  • [10] Hansen K(undefined)undefined undefined undefined undefined-undefined
12