The Apparent Density, Tensile Properties and Drying Shrinkage of Ultra High Toughness Cementitious Composites

Author:

Cai Xiang Rong1,Fu Bai Quan2,Xu Shi Lang3

Affiliation:

1. Building Science Research Institute of Liaoning Province

2. Shenyang jianzhu University

3. Zhejiang University

Abstract

A new class of high performance fiber reinforced cementitious composites called Ultra High Toughness Cementitious Composites (UHTCC) is developed in the last few years. It is a pseudo strain hardening material with maximum tensile strain capacity more than 3%, yet the fiber volume fraction no more than 2%. The multiple cracking patterns accompanying pseudo strain hardening behavior are obtained which implies high ductility, energy absorption capacity, and toughness. A remarkable characteristic distinguish it from conventional high performance fiber reinforced concrete is the maximum crack width of multiple cracks which is about 60µm under ultimate tensile load. Such micro-cracks are often small enough to prevent the intrusion of aggressive agents. From a durability point of view this composite can be considered as an effectively uncracked material. The performances of this new material, including the apparent density, the uniaxial tensile property, and the drying shrinkage performance, are experimental studied in this paper.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference6 articles.

1. S.L. Xu, X. R. Cai. Experimental study on mechanical properties of ultra high toughness fiber reinforced cementitious composite. Journal of Hydraulic Engineering. Vol. 40 (2009), pp.1055-1063 ( in Chinese).

2. S.L. Xu, X. R. Cai. Experimental Study and Theoretical Models on Compressive Properties of Ultrahigh Toughness Cementitious Composites. ASCE J. Materials in Civil Engineering. Vol. 22 (2010), pp.1067-1077.

3. X. R. Cai, S.L. Xu. Study on corresponding relationships between flexural load-deformation hardening curves and tensile stress-strain hardening curves of UHTCC. Engineering mechanics. Vol. 27 (2010), pp.8-15 ( in Chinese).

4. H. D. Li, S.L. Xu. Tensile and flexural properties of ultra high toughness cementitious composite. Journal of Wuhan University of Technology (Materials Science Editon), Vol. 24 (2009), pp.677-683.

5. V.C. Li. On Engineered Cementitious Composites (ECC) – A review of the material and its applications. Advanced Concrete Technology, Vol. 1 (2003), pp.215-230.

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