A contribution to the study of the fracture energy of polymer concrete and fibre reinforced polymer concrete

2004 ◽  
Vol 23 (4) ◽  
pp. 437-440 ◽  
Author(s):  
J.M.L. Reis ◽  
A.J.M. Ferreira
Keyword(s):  
Fracture Energy ◽  
Polymer Concrete ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Seismic Performance of Natural Fibre Reinforced Polymer-Concrete Bridge Piers

2015 ◽  
Vol 1120-1121 ◽  
pp. 1480-1484 ◽  
Author(s):  
Jia Xin Chen ◽  
Nawawi Chouw
Keyword(s):  
Seismic Performance ◽  
Construction Materials ◽  
Natural Fibre ◽  
Polymer Concrete ◽  
Reinforced Polymer ◽  
Earthquake Resistant Structures ◽  
Future Earthquake ◽  
Fibre Reinforced Polymer ◽  
New Construction ◽  
Shake Table Experiments

This paper addresses the usage of new construction materials made of natural fibre reinforced polymer and concrete composite for future earthquake-resistant structures. The structure considered is a simple circular bridge pier. To evaluate the seismic performance of the structure shake table experiments were performed. To reveal the consequence of the magnitude of the ground excitation for the structure the effect of a gradual increase of the peak ground displacement is investigated. The results show that although external damage to the structure cannot be observed the bond between polymer and concrete is a significant factor that determines the performance of the structure.

Improvement of flammability resistance of epoxy adhesives used in infrastructure applications

2007 ◽  
Vol 34 (3) ◽  
pp. 323-330 ◽  
Author(s):  
Lixin Wu ◽  
Suong V Hoa ◽  
Heng Wang
Keyword(s):  
Epoxy Adhesive ◽  
Polymer Concrete ◽  
Limit Oxygen Index ◽  
Index Number ◽  
Test Results ◽  
Epoxy Adhesives ◽  
Reinforced Polymer ◽  
Average Residual ◽  
Fire Endurance ◽  
Fibre Reinforced Polymer

Fire endurance of fibre-reinforced-polymer (FRP) concrete systems is crucial for safe use of FRPs in the construction industry. Nanoclay was introduced into epoxy resin to retard flame spread and improve the fire endurance of bonds between FRP and concrete. Test results show that the addition of nanoclay can greatly improve the flame retardancy of epoxy. With only 2% nanoclay, the limit oxygen index number of epoxy increases by 5 and 10 using two types of mixing methods developed at the Concordia Centre for Composites. The epoxy with the addition of nanoclay possesses self-extinguishing properties, whereas the epoxy without the addition of nanoclay burned completely. After exposure to 260 °C for 2 h, the FRP-concrete system using epoxy and 2% nanoclay adhesive showed 23% greater average residual bonding strength than that using control epoxy adhesive. The nanoclay used in this study is a nontoxic and inexpensive material that may fulfill the requirements for civil engineering applications.Key words: fire resistance, fibre-reinforced polymer, concrete, bond, adhesive, nanoclay, epoxy.

scholarly journals Flexural Fatigue-Life Assessment and Strength Prediction of Glass Fibre Reinforced Polymer Concrete Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Raman Bedi ◽  
S. P. Singh ◽  
Rakesh Chandra
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Glass Fibre ◽  
Strength Prediction ◽  
Polymer Concrete ◽  
Flexural Fatigue ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

The paper presents the results of an investigation conducted to assess the fatigue-life and prediction of flexural fatigue strength of polymer concrete composites based on epoxy resin as binder material. Three point flexural fatigue tests were conducted on polymer concrete specimens using MTS servo controlled actuator, to obtain the fatigue lives of the composites at different stress levels. One hundred and thirty-seven specimens of size 40×40×160 mm were tested in flexural fatigue. Forty-three static flexural tests were also conducted to facilitate fatigue testing. It has been observed that the probabilistic distribution of fatigue-life of polymer concrete composite (PCC) and glass fibre reinforced polymer concrete composite (GFRPCC), at a particular stress level, approximately follows the two-parameter Weibull distribution, with statistical corelation coefficient values exceeding 0.90. The fatigue strength prediction model, representing S-N relationship, has been examined and the material coefficients have been obtained for GFRPCC containing 0.5% and 1.0% glass fibres. Design fatigue lives for GFRPCC containing different contents of glass fibres have been estimated for acceptable probabilities of failure and compared with those of PCC.

Mechanics of fibre-reinforced polymer - concrete interfaces

2007 ◽  
Vol 34 (3) ◽  
pp. 367-377 ◽  
Author(s):  
U A Ebead ◽  
K W Neale
Keyword(s):  
Finite Element ◽  
Load Capacity ◽  
Concrete Block ◽  
Polymer Concrete ◽  
Element Analysis ◽  
Interface Elements ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Interfacial Behaviour ◽  
Fibre Reinforced Polymer

A finite element model is developed for analyzing the interfacial behaviour for fibre-reinforced polymer (FRP) laminates externally bonded to concrete prisms and subjected to direct shear. The element sizes of the FRP, adhesive, and concrete at the interface were chosen to be very small (0.25–0.5 mm) so that the debonding behaviour could be properly captured. The behaviour at the interface between the FRP composite and the concrete is modelled using truss elements connecting the FRP laminate to the concrete block. The truss elements incorporate a nonlinear bond stress-slip relationship controlled by several parameters related to the characteristics of the FRP composite, adhesive, and concrete. Results are given in terms of the load capacity of the joint and the stress and strain distributions in the FRP, at the interface, and in the concrete. In addition, the transfer lengths, as well as the force transfer between the FRP laminate and the concrete block, are investigated. Comparisons between the finite element results and available experimental data are presented.Key words: nonlinear finite element analysis, FRP-to-concrete bonded joints, interface elements, debonding, interfacial behaviour, transfer lengths.

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