Development of cost-effective VARTM technology for repair and hardening design method and specifications for ALDOT contractor : phase 3.

Uddin, Nasim; Ramos, Luis; Vaidya, Uday; University of Alabama. Dept. of Civil and Environmental Engineering; University of Alabama. Dept. of Materials Science and Engineering

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Development of cost-effective VARTM technology for repair and hardening design method and specifications for ALDOT contractor : phase 3.

2013-04-01
By Uddin, Nasim ; Ramos, Luis ; Vaidya, Uday

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English

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Details:

Creators:

Uddin, Nasim ; Ramos, Luis ; Vaidya, Uday

Uddin, Nasim ; Ramos, Luis ; Vaidya, Uday Less -
Corporate Creators:

University of Alabama. Dept. of Civil and Environmental Engineering ; University of Alabama. Dept. of Materials Science and Engineering

University of Alabama. Dept. of Civil and Environmental Engineering ; University of Alabama. Dept. of Materials Science and Engineering Less -
Subject/TRT Terms:

[+]

Alternatives Analysis Cost Effectiveness Durability Fiber Reinforced Polymers Flexural Strength Reinforced Concrete Repairing Resins Surface Preparation Vacuum
Publication/ Report Number:

ALDOT Report 930-607B
Resource Type:

Tech Report
Geographical Coverage:

Alabama
Corporate Publisher:

Alabama. Dept. of Transportation
Abstract:

Resin infusion, a method of fabricating fiber reinforced polymer (FRP), has been shown to produce a stronger FRP of

more consistent quality than other methods. It is a preferred method of fabrication in industries like automotive,

aerospace, and boat building. In infrastructure, however, FRP is commonly applied by the hand layup method. Hand

layup produces FRP of questionable quality. Vacuum Assisted Resin Transfer Molding (VARTM), a form of resin

infusion, can be used to apply externally bonded FRP to infrastructure to increase structural capacity. Based on

experience and knowledge in other industries, VARTM is expected to produce a better FRP than that currently used

in infrastructure. This report aims to facilitate the transfer of a proven technology for the benefit of this industry.

This report highlights VARTM’s benefits compared to hand layup for infrastructure applications. Shear and flexural

strength and strain are tested and compared to verify the assumption that VARTM can produce a better FRP. FRP

durability is one of the main areas where further research is needed for externally bonded FRP. This report does a

thorough analysis of the performance of both VARTM and hand layup FRP durability. Temperature and humidity

have been identified as the principal drivers of environmental degradation. Accelerated conditioning protocols

(ACP) for both temperature extremes are applied.

Having analyzed VARTM FRP strength and durability, this research will also test a modification to improve the

VARTM application process on concrete structures. Grooves sawed into concrete are believed to be able to

accelerate the VARTM application time without diminishing the capacity of the final product. Both of these

assumptions are tested and verified. Having proven VARTM performance and having found a way to improve the

original application process, it is hoped that this research has facilitated the implementation of VARTM FRP.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

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urn:sha256:0cec020399bee4da8af4c81fbae728c1274182fbfe0ec05d4feb596fde83b0bf
Download URL:

https://rosap.ntl.bts.gov/view/dot/28052/dot_28052_DS1.pdf
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Development of cost-effective VARTM technology for repair and hardening design method and specifications for ALDOT contractor : phase 3.

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