Assessment of Ultra-High Performance Concrete Overlays on Concrete Bridge Decks

Toledo, William K.; Davila, Leticia; Al-Basha, Ahmed J.; Newtson, Craig M.; Weldon, Brad D.

doi:10.1061/9780784483305.028

Cited by 2 publications

(2 citation statements)

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“…One of the solutions to this problem can be fixed by using a 25-52-mm or 1-2-inch thick UHPC overlay [6]. UHPC can potentially be a material solution for bridge repair because of its ability to withstand the frost effect, alkali-silica reaction, and abrasion [7]. According to the research of Ahmed J et al, bridge repair methods with overlay can use highperformance concrete (HPC), low-slump concrete (LSC), latex-modified concrete (LMC), and polymer-IOP Publishing doi:10.1088/1755-1315/1195/1/012020 2 based concrete (PBC).…”

Section: Introductionmentioning

confidence: 99%

“…According to the research of Ahmed J et al, bridge repair methods with overlay can use highperformance concrete (HPC), low-slump concrete (LSC), latex-modified concrete (LMC), and polymer-IOP Publishing doi:10.1088/1755-1315/1195/1/012020 2 based concrete (PBC). These materials have drawbacks in the form of longevity, availability of materials, and price when compared to UHPC with a thickness of 25 mm [7].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of bonding performance of ultra high-performance concrete with fly ash content as overlay on normal strength concrete.

Kuncoro

Pranoto

Sacca

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Ultra High-Performance Concrete (UHPC) has good mechanical strength and durability, so it can be the solution for an overlay material for old materials that need to be renewed. The problem with using UHPC as a construction material is the high price and sustainability, so a partial replacement for cement is required to reduce production costs, energy consumption, and CO2 gas emissions. Bonding performance is an important parameter and must be considered when applying UHPC as an overlay material. The bonding performance test of the UHPC consists of three tests: the slant shear test, splitting tensile, and direct tensile/pull-off test. The results of this study were compared with the standards of ACI 546R-14 and M.M. Sprinkel & C. Ozyildirim. Based on the test results, replacing 40% of cement with fly ash on UHPC is good to use as an overlay because it meets applicable standards. The test results showed an increase of 27% in the slant shear test and 37% in the splitting tensile test compared to the existing standard. Replacing cement with fly ash in UHPC can also increase workability, reducing the need for superplasticizers, reducing UHPC production costs by 18.4%, energy consumption, and CO2 emission problems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of bonding performance of ultra high-performance concrete with fly ash content as overlay on normal strength concrete.

Kuncoro

Pranoto

Sacca

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Performance of Bond between Old and New Concrete Layers: The Effective Factors, Durability and Measurement Tests—A Review

Mokhtari,

Hassan

2024

Infrastructures

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With the rise in construction costs and aging of existing concrete structures, retrofitting and strengthening have gained more popularity. Among all of the available techniques, adding new repairing layers on top of old concrete ones has proven to be highly effective. However, the efficacy of such method is dependent on the performance of the cold bond between old and new layers of concrete whose establishment requires different considerations, such as paying attention to the properties of concrete layers, namely their strength, permeability, aggregate size, density, etc., and the qualities of the interface between the layer, such as how wet it is or its roughness degree. In this paper, the factors which can impact shear and tensile bond strength are fully discussed while being categorized into two major groups of factors related to each concrete layer’s properties and those directly associated with the connection area. The durability of the bond after exposure to various environments in terms of temperature and relative humidity is also addressed and then a list and comparison of numerous tests that are commonly conducted to measure the bond strength are provided. The findings indicate the characterization of suitable materials and surface roughening techniques which can ensure an adequate bonding between substrate and overlay, along with recommendations for the scope of future research.

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Assessment of Ultra-High Performance Concrete Overlays on Concrete Bridge Decks

Cited by 2 publications

References 1 publication

Evaluation of bonding performance of ultra high-performance concrete with fly ash content as overlay on normal strength concrete.

Evaluation of bonding performance of ultra high-performance concrete with fly ash content as overlay on normal strength concrete.

Performance of Bond between Old and New Concrete Layers: The Effective Factors, Durability and Measurement Tests—A Review

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