Comparative study between strain gages for determination of autogenous shrinkage

Materia

Lopes, Anne Neiry de Mendonça¹  Paulo Junior, Francinete²  Silva, Eugênia Fonseca da³ 

[1] Furnas Centrais ElétricasGST, Aparecida de Goiânia, Brasil;Instituto Federal de Goiás, Goiânia, Brasil;Universidade de Brasília, Brasília, Brasil

关键词: high strength concrete;    autogenous shrinkage;    Carlson.;   

DOI  :  10.1590/s1517-707620180003.0518

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The Carlson-type strain gages are the most suitable for the measurement of autogenous shrinkage. However, your high cost is usually a limiting factor for your employment. A more economical alternative would be the use of Self-Temperature-Compensation Gages to be embedded in concrete. The main objective of this work was to verify if Self-Temperature-Compensation Gages can be used instead of the Carlson type to determine the autogenous shrinkage in high performance concrete. It was carried out measurements of the autogenous shrinkage, for the same concrete mix, using the two types of extensometers. The difference in the means of the autogenous shrinkage results between these two types of extensometers was typically less than 10x10-6 m/m.

【 授权许可】

CC BY