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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characterisation of the tensile constitutive behaviour of fibre-reinforced concrete: A new configuration for the Wedge Splitting Test

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Author(s):
Segura-Castillo, Luis [1] ; Monte, Renata [2] ; de Figueiredo, Antonio D. [2]
Total Authors: 3
Affiliation:
[1] Univ Republica, UdelaR, Montevideo - Uruguay
[2] Univ Sao Paulo, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CONSTRUCTION AND BUILDING MATERIALS; v. 192, p. 731-741, DEC 20 2018.
Web of Science Citations: 2
Abstract

The fib Model Code chose the EN14651 test as the basic method for evaluating the structural behaviour of fibre-reinforced concrete (FRC). However, there are technological restrictions that must be considered. For example, this test has a relatively complex execution, and it is difficult to carry it out under samples extracted from real structures. In this study, an experimental campaign is developed to validate a new test, called Montevideo (MVD) test, for FRC. The test is based on the wedge-splitting test, but simplifications in terms of sample preparation and loading device allow it to be used in routine quality control. The results show a) a stable friction coefficient between the wedge and sample; b) a linear relationship between wedge displacement and crack mouth opening displacement (CMOD), which allows conducting the test through the stroke displacement only; c) a coefficient of variation below the usual range of the EN14651 test; and d) a load correlation factor (k(MVP) = 2.5) to transform the loads from the MVD test to EN14651 test for large values of CMODs (above 2 mm). This test can be performed on samples prepared from extracted cores with an open displacement control system in specimens with softening behaviour, and without producing post-peak instabilities. The development of the MVD test provides a practical and simple method for controlling the FRC quality, complementary to the EN14651 test. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 16/05255-5 - Development of a compact test method for fiber reinforced concrete residual strength evaluation
Grantee:Antonio Domingues de Figueiredo
Support Opportunities: Research Grants - Visiting Researcher Grant - International