Measurement and Analysis of Early-Age Concrete Strains and Stresses: Continuously Reinforced Concrete Pavement Under Environmental Loading

Nam, Jeong-Hee; Kim, Seong-Min; Won, Moon

doi:10.3141/1947-08

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…As pavements generally have a large surface area, shrinkage-induced cracking in concrete pavements is more critical than in other structural members (Zhang and Li 2001) and can significantly affect their performance and lifetime (Nam et al 2006;Kwon and Shah 2008). Curling resulting from drying shrinkage is a common cause of pavement slab failure (Ruiz et al 2005) and creates high stress regions near the drying surface (Lee et al 2010).…”

Section: Introductionmentioning

confidence: 99%

The effect of shrinkage cracks on the load bearing capacity of steel-fibre-reinforced roller-compacted-concrete pavements

2015

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Section: Introductionmentioning

confidence: 99%

The effect of shrinkage cracks on the load bearing capacity of steel-fibre-reinforced roller-compacted-concrete pavements

2015

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“…In order to calculate the thermal strains and stresses of concrete slabs, the COTE of concrete is needed. The COTE of concrete is measured by many researchers so far (Nam et al, 2006;Byfors, 1980;ACI Committee. 517, 1980;Emborg, 1989).…”

Section: Temperature Of the Concrete Slabmentioning

confidence: 99%

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

Mirsayar¹,

Zollinger²

2018

10.5267/j.esm

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The use of cement concrete as a stronger and more durable material than asphalt concrete in construction of the pavements has been increased during the past decades. This review paper investigates the effect of various input variables for the design of continuously reinforced concrete pavements. A literature review is prepared based on the efforts performed by many researchers to investigate the effect of different factors including temperature change, shrinkage, material properties of the concrete, and concrete slab/ subbase bond properties on the displacements and stresses in the concrete slab. It is found that the important role of concrete slab/ subbase bond strength has not been investigated properly as compared to other input variables.

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“…The crack width was determined with a ruler on the slab surface. Although fast, this method only provides the crack width at the surface; it is known that crack width varies with depth (NAM et al, 2006). Table 4.1 presents the crack width for three position, right (Rnear the edge), center (C) and left (L -near the center line) along with the average crack width from these three measurements.…”

Section: Crack Widthmentioning

confidence: 99%

Short continuously reinforced concrete pavement design recommendations based on non-destructive ultrasonic data and stress simulation.

Salles¹

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Four sections of continuously reinforced concrete pavement (CRCP) were constructed at the University of São Paulo campus in order to introduce this kind of pavement structure to Brazil's technical transportation community. Sections were designed as 50 m long concrete slab, short in comparison to traditional CRCP, in order to simulate bus stops and terminalslocations of critical interest for public infrastructure. The thesis presented herein concludes this research project initiated in 2010. As the initial goal of this study was the development of coherent, reliable and intuitive design recommendations for the use of CRCP technology in Brazil, a profound understating of its structural and performance peculiarities was needed. For that, the cracking process of the experimental CRCP sections was recorded over a span of seven years. Due to the sections' short length and lack of anchorage, the experimental "short" CRCP presented a cracking behavior quite different than traditional CRCP. There were much less visible cracks than expected. To address this issue, a novel technology in ultrasonic nondestructive testing of concrete structures was applied. Through ultrasonic signal interpretation it was possible to discover several incipient non-visible cracks within the slabsmany of these became apparent on the slab surface in later crack surveysand to characterize visible and non-visible cracks regarding crack depth. The updated crack map with non-visible cracks showed similarities with traditional CRCP. Additionally, the ultrasonic data analysis provided important information on thickness variation, reinforcement location and concrete condition that were applied in theoretical simulations (finite element software) of the short CRCP. Simulations were attempted considering different slab geometries, firstly with transverse cracks as joints with high load transfer efficiency (LTE) and secondly with a continuous slab without cracks or joints. The latter simulation was more accurate reaching a shift factor between field and simulated stresses in the order of 0.7 to 1.0. Deflection data and LTE analysis from cracks and panels in between cracks further attested the slab continuous behavior, which contradicts current CRCP design models and performance predictors. Furthermore, critical traffic and environmental loading conditions concerning Brazil's climate and bus traffic characteristics were investigated and related using a selected fatigue model resulting in design recommendations in a chart format for the short CRCP aimed at long-term projects for over 20 years of operation. The design chart was successfully applied to investigate three failures presented by the experimental short CRCP due to thickness deficiencies pointed out by the ultrasonic testing.

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Measurement and Analysis of Early-Age Concrete Strains and Stresses: Continuously Reinforced Concrete Pavement Under Environmental Loading

Cited by 7 publications

References 1 publication

The effect of shrinkage cracks on the load bearing capacity of steel-fibre-reinforced roller-compacted-concrete pavements

The effect of shrinkage cracks on the load bearing capacity of steel-fibre-reinforced roller-compacted-concrete pavements

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

Short continuously reinforced concrete pavement design recommendations based on non-destructive ultrasonic data and stress simulation.

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