A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fatigue behavior of new ultra-high performance cement composite
The LCPC has patented a new cement composite, CEMTECmultiscale, which have been developed to be stress hardening in tension and to have a very high tensile strength, more than 20 MPa. The main objective is to be able to conceive structural element without any reinforcement, except metallic fibers. The composite is conceived starting from the same concept as a Multi-Scale Cement Composite, but with two evolutions. First, it contains 3 different metallic fiber geometries. Secondly the volume fraction of fiber is increased up to 11%. One of the industrial applications aimed is related to thin structural slabs. In this type of application the fatigue behavior is a very important problem to verify. So, the objective of this research is to study and quantify the CEMTECmultiscale fatigue behavior. The paper examines the response of this new ultra-high performance cement composite (UHPCC) to static and cyclic loading. Static and fatigue tests were performed on thin prismatic specimens under flexion. Deflection at mid-span, strain in the constant moment zone and crack opening are monitored using adequate transducers. A critical initial strain threshold is identified; a strong correlation is highlighted between the fatigue life and the initial damage (due to the first static loading). A Wöhler curve is rebuilt based on the initial damage measurement (during first static loading) and the characteristic static curve (integrating dispersion). The fatigue endurance limit calculated is equal to 30 MPa, respectively 65 % of the characteristic Modulus of Rupture. A gain of 7% is observed between the bending static behaviour of the specimens being previously loaded in fatigue and those not being loaded in fatigue.
Fatigue behavior of new ultra-high performance cement composite
The LCPC has patented a new cement composite, CEMTECmultiscale, which have been developed to be stress hardening in tension and to have a very high tensile strength, more than 20 MPa. The main objective is to be able to conceive structural element without any reinforcement, except metallic fibers. The composite is conceived starting from the same concept as a Multi-Scale Cement Composite, but with two evolutions. First, it contains 3 different metallic fiber geometries. Secondly the volume fraction of fiber is increased up to 11%. One of the industrial applications aimed is related to thin structural slabs. In this type of application the fatigue behavior is a very important problem to verify. So, the objective of this research is to study and quantify the CEMTECmultiscale fatigue behavior. The paper examines the response of this new ultra-high performance cement composite (UHPCC) to static and cyclic loading. Static and fatigue tests were performed on thin prismatic specimens under flexion. Deflection at mid-span, strain in the constant moment zone and crack opening are monitored using adequate transducers. A critical initial strain threshold is identified; a strong correlation is highlighted between the fatigue life and the initial damage (due to the first static loading). A Wöhler curve is rebuilt based on the initial damage measurement (during first static loading) and the characteristic static curve (integrating dispersion). The fatigue endurance limit calculated is equal to 30 MPa, respectively 65 % of the characteristic Modulus of Rupture. A gain of 7% is observed between the bending static behaviour of the specimens being previously loaded in fatigue and those not being loaded in fatigue.
Fatigue behavior of new ultra-high performance cement composite
Parant, Edouard (author) / Rossi, Pierre (author) / Boulay, Claude (author)
2004
8 Seiten, 6 Bilder, 1 Tabelle, 3 Quellen
Conference paper
English
Fatigue behavior of new ultra-high performance cement composite
| British Library Conference Proceedings | 2004
| British Library Online Contents | 2018
| British Library Online Contents | 2018