scholarly journals Recent Developments of FRP Bars as Internal Reinforcement in Concrete Structures & Field Applications

◽  
2016 ◽  
Author(s):  
Brahim Benmokrane ◽  
◽  
Hamdy Mohamed ◽  
Ehab Ahmed ◽  
◽  
...  
Keyword(s):  
Concrete Structures ◽  
Recent Developments ◽  
Frp Bars

Le béton projeté : nouveaux développements et applications

2000 ◽  
Vol 27 (2) ◽  
pp. 383-388 ◽  
Author(s):  
Marc Jolin ◽  
Pierre Lacombe
Keyword(s):  
Civil Engineering ◽  
Setting Time ◽  
Concrete Structures ◽  
Concrete Repair ◽  
Basic Principles ◽  
Dry Process ◽  
Air Content ◽  
The Third ◽  
General Rules ◽  
Recent Developments

This paper presents the most recent developments in shotcrete technology obtained in the last 5 years through the "Industrial Chair on Shotcrete and Concrete Repair" hosted at Laval University. The main goal of this paper is to inform those involved in the construction and repair of civil engineering concrete structures of the various possibilities of "shotcrete." The two first sections present the basic principles in pneumatic application of concrete along with the two processes in shotcrete technology, the dry-mix and wet-mix. The advantages of both processes as well as the general rules to follow in a shotcrete application are also presented and explained. The third and last section, the most important, highlights the latest developments in shotcrete technology. These developments concern the use of set accelerating admixtures in dry process shotcrete and their effects on the durability of materials, the use of liquid and powdered air-entraining admixtures in dry-mix shotcrete as well as the concept of "high initial air content" in wet mix shotcrete.Key words: shotcrete, set accelerator, air-entraining admixture, durability, setting time.

scholarly journals Laboratory assessment and durability performance of vinyl-ester, polyester, and epoxy glass-FRP bars for concrete structures

2017 ◽  
Vol 114 ◽  
pp. 163-174 ◽  
Author(s):  
Brahim Benmokrane ◽  
Ahmed H. Ali ◽  
Hamdy M. Mohamed ◽  
Adel ElSafty ◽  
Allan Manalo
Keyword(s):  
Vinyl Ester ◽  
Concrete Structures ◽  
Laboratory Assessment ◽  
Glass Frp ◽  
Durability Performance ◽  
Frp Bars

The effects of seawater on the integrity of offshore structures

1978 ◽  
Vol 76 (1-3) ◽  
pp. 95-114
Author(s):  
T. Hodgkiess
Keyword(s):  
Corrosion Fatigue ◽  
Concrete Structures ◽  
Steel Structures ◽  
Offshore Structures ◽  
Internal Environment ◽  
The North ◽  
Recent Developments ◽  
The North Sea ◽  
Corrosion Mechanisms ◽  
Basic Features

SynopsisThis paper reviews the knowledge of deterioration processes which occur when steel and concrete structures are situated in seawater. The basic corrosion mechanisms of steel, together with possible methods of protection, are outlined briefly. With regard to coatings and cathodic protection, recent developments to counteract the increasingly severe conditions encountered by oil-production platforms in the North Sea, are discussed. Concrete structures usually provide a naturally-inhibitive internal environment to confer protection from corrosion to encased steel reinforcements, but mention is made of the possibilities of such protection becoming ineffective during long service in severe offshore conditions.The basic features of corrosion fatigue are described in the light of recent research but some aspects, which are of great importance for the performance of steel structures, are shown to be not well documented or understood. Corrosion fatigue of concrete structures has not been studied extensively, a particularly neglected area being the elucidation of the fundamental mechanisms of deterioration.

scholarly journals Mechanical Properties of Hybrid FRP Bars and Nano-Hybrid FRP Bars

2019 ◽  
Vol 65 (1) ◽  
pp. 97-110 ◽  
Author(s):  
E.D. Szmigiera ◽  
K. Protchenko ◽  
M. Urbański ◽  
A. Garbacz
Keyword(s):  
Axial Loading ◽  
Structural Behaviour ◽  
Reinforced Polymer ◽  
Hybrid Fibre ◽  
Recent Developments ◽  
Fibre Reinforced Polymer ◽  
Efficient Alternative ◽  
The Difference ◽  
Nanosilica Particles ◽  
Frp Bars

AbstractThe paper describes the recent developments of Hybrid Fibre-Reinforced Polymer (HFRP) and nano-Hybrid Fibre-Reinforced Polymer (nHFRP) bars. Hybridization of less expensive basalt fibres with carbon fibres leads to more sustainable alternative to Basalt-FRP (BFRP) bars and more economically-efficient alternative to Carbon-FRP (CFRP) bars. The New-Developed HFRP bars were subjected to tensile axial loading to investigate its structural behaviour. The effect of hybridization on tensile properties of HFRP bars was verified experimentally by comparing the results of tensile test of HFRP bars with non-hybrid BFRP bars. It is worth to mention that the difference in obtained strength characteristics between analytical and numerical considerations was very small, however the obtained results were much higher than results obtained experimentally. Authors suggested that lower results obtained experimentally can be explained by imperfect interphase development and therefore attempted to improve the chemical cohesion between constituents by adding nanosilica particles to matrix consistency.

scholarly journals Performance Improvement of a Fiber-Reinforced Polymer Bar for a Reinforced Sea Sand and Seawater Concrete Beam in the Serviceability Limit State

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 654 ◽  
Author(s):  
Jiafei Jiang ◽  
Jie Luo ◽  
Jiangtao Yu ◽  
Zhichen Wang
Keyword(s):  
Composite Beam ◽  
Limit State ◽  
Concrete Structures ◽  
Fiber Reinforced Polymer ◽  
Serviceability Limit State ◽  
Reinforced Polymer ◽  
Cracking Control ◽  
Sea Sand ◽  
Optic Fibers ◽  
Frp Bars

Fiber-reinforced polymer (FRP) has supreme resistance to corrosion and can be designed with optic fibers. FRP can be an alternative to steel reinforcement for concrete structures, and can serve as a sensor for smart concrete structures. Due to poor cracking control and bond performance, the limit of flexural capacity in the serviceability limit state has not been determined, which has obstructed the wider application of FRP bars in smart structures. In this study, in order to overcome these shortcomings, a new engineering cementitious composite (ECC) with superior tensile strain capacity was used to replace the cover around the FRP bars in the tensile zone. To investigate the anti-cracking performance of the new composite beam, seven simply supported beams were designed. In the preliminary investigation, the longitudinal FRP bars in these beams were designed without optic fibers to focus on the mechanical behavior. The beams were tested under four-point load and measured using the digital sensor technique, digital image correlation (DIC). The test results showed that introducing a new ECC layer on the tensile side improves the cracking control and flexural behavior (load capacity and deformability) of a FRP-reinforced sea sand and seawater concrete (SSC) beam, especially in the serviceability limit state. We demonstrate the new composite beam can steadily and fully improve the tensile capacity of FRP bars, which is the basis of using FRP bars as sensors.

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