Home
Resource
Development of low-shrinkage rapid set composite and simulation of shrinkage cracking distribution in repaired concrete members
PDF
PDF format is widely accepted and good for printing.
Plug-in required
PDF-1(5.22 MB)
Citation & Export
View Usage Statistics
Staff View

Citation & Export
Hide

Simple citation

Mansi, Aseel Shaban. Development of low-shrinkage rapid set composite and simulation of shrinkage cracking distribution in repaired concrete members. Retrieved from https://doi.org/doi:10.7282/t3-4wae-z928

Export

Click here for information about Citation Management Tools at Rutgers.

Statistics
Hide

Description

TitleDevelopment of low-shrinkage rapid set composite and simulation of shrinkage cracking distribution in repaired concrete members
NameMansi, Aseel Shaban (author); Yong, Yook-Kong (chair); Rutgers University; School of Graduate Studies
Date Created2019
Other Date2019-05 (degree)
SubjectCivil and Environmental Engineering, Cement composites, Portland cement, Concrete -- Cracking
Extent1 online resource (xii, 132 pages) : illustrations
DescriptionAs the global transportation infrastructure aged, the need for effective maintenance has become necessary to maintain not only strength but also durability. Although many materials used in repair provide adequate strength, they can suffer early failure and degradation as a result of several phenomena such as rigidness and rapid shrinkage. In instances where such repair materials are used, cracking and debonding can quickly occur because of the high stresses developed in the system. The Portland cement repair material considered reliable repair materials; however, they require sufficient curing time which leads to detours or lane closures. Hence, the efficient repair and replacement of concrete pavements often require a rapid setting material that can be placed, cured, and opened to traffic in a relatively short period of time. Rapid-hardening cementitious repair materials have been widely used. The use of very early strength materials will minimize the out-of-service time of the effective repairs.
In this dissertation, experimental and analytical programs were carried out. The experimental program included three phases. The first phase was conducted to design and test the fresh and shrinkage properties of high early strength rapid set materials (HES-RSM) and high early strength fiber reinforced rapid set materials (HES-FR-RSM)
mixtures. These mixtures were developed for concrete repair applications in transportation infrastructures with low cracking potential. For this purpose, three of the most common ready patch repair materials and approved from the most of DOT’S were selected, the samples were cured using dry curing to simulate the critical condition in the repair process. As a fiber reinforcement, three types of fibers (steel, carbon, and basalt) with different percentages were prepared to select the best mix designs that satisfy various requirements. The second phase was performed to investigate the mechanical properties of the optimized mixtures which selected from the first phase depending on its shrinkage strain and flowability requirements. The third phase contains the validation of the model. The analytical part of this research included the development of a finite element model (FEM) that can be used for the analysis and prediction of the structural behavior of the composite repaired beams due to the shrinkage effect of the repair materials.
The results showed that the developed HES-FR-RSM can achieve high early compressive strength more than 3000 psi and modulus of rupture more than 1400 psi at the age of 4hrs. The free shrinkage strain values were below than 500 microstrains for the most optimized mixtures. The best performance mixture was C1S0.5 with 268 microstrains which is less than the tensile strain capacity of concrete which ranges from 200 to 300 microstrains. The model establishes the development of a good basic tool to study the effects of free shrinkage of the repair materials on the repaired composite and make the selecting repair materials easiest for the engineers for practical purpose. The model is also capable of simulating the crack initiations and could describe the real structural behavior.
NotePh.D.
NoteIncludes bibliographical references
Genretheses, ETD doctoral
Persistent URLhttps://doi.org/doi:10.7282/t3-4wae-z928
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
Version 8.5.5
Rutgers University Libraries - Copyright ©2024