permeability compatibility between concrete repair

Permeability Compatibility Between Concrete Repair ...

Permeability Compatibility Between Concrete Repair Material and Concrete Substrate - Scoping Study. 8 . Abstract . The primary objective of this report is to develop a robust research program and to highlight the importance of research related to freeze-thaw durability and repair material compatibility with existing concrete substrates.

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Bureau of Reclamation : Research and Development ...

Permeability Compatibility Between Concrete Repair Material and Concrete Substrate. Project ID: 1863 Principal Investigator: Shannon Harrel Research Topic: Repair and Maintenance Funded Fiscal Years: 2018, 2019 and 2020

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Compatibility of concrete repair materials and systems ...

Feb 01, 1996  Permeability compatibility In designing repair materials and systems consideration should be given to the permeability of the repair mater­ial relative to that of the substrate concrete. This is important not only from the perspective of chloride ion diffusion and electrochemical compatibility, but also with respect to the ability of the ...

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Compatibility Issues in Design and Implementation of ...

Figure 25. – Model of concrete repair failure caused by cracking [68].....70 Figure 26. – Low permeability material – high permeability repair. The core sample will have low permeability, but the crack allows for high permeability in the repair [71]..... 71 Figure 27.

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Durable concrete repair — Importance of compatibility and ...

Jan 01, 1997  Those most often considered are compressive strength and low permeability. As reinforced concrete most often fails due to chloride ingress or carbonation this may seem logical. In fact, failure of a concrete repair material is more likely to occur due to incompatibility between the repair and concrete or high shrinkage levels.

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INVESTIGATION INTO COMPATIBILITY BETWEEN REPAIR

May 10, 2015  compatibility between repair material and substrate concrete. The compatibility between repair material and substrate concrete exists when the composite section of repair ... freeze-thaw resistance, and permeability, were determined using standard ASTM test procedures. Second, the compatibility was investigated using a composite beam of repair ...

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Compatibility Considerations for Durable Concrete Repairs

The topic of durability of concrete repair is too broad to be presented in a single paper. This paper, therefore, will be limited to reviewing one problem aspect of repair: compati­ bility. This paper is an attempt to characterize compatibility between repair materials and existing concrete and its relative contribution to durability.

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Durable concrete repair — Importance of compatibility and ...

Those most often considered are compressive strength and low permeability. As reinforced concrete most often fails due to chloride ingress or carbonation this may seem logical. In fact, failure of a concrete repair material is more likely to occur due to incompatibility between the repair and concrete or high shrinkage levels.

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Performance Compatability of Permeability Reducing and ...

permeability reducing admixtures at various dose rates. The program included testing of both plastic state and hardened state properties of these concretes to assess the compatibility and impact on performance properties. Both concrete and mortar testing have been undertaken in

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A Study on Compatibility of Concrete Repair Materials

repairs. Compatibility is a balance of physical, chemical and electrochemical properties and dimensions between a repair material and the existing concrete substrate that certain thing the repair can withstand all the stresses induced by the volume change, chemical and electrochemical effects without distress.

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Compatibility of repair mortars with concrete in a hot-dry ...

Feb 01, 2001  Compatibility in a repair system is the combination of properties between the repair material and the existing concrete substrate which ensures that the combined system withstands the applied stresses and maintains its structural integrity and protective properties in a certain exposure environment over a designated service life , .Dimensional stability, chemical, electrochemical, and ...

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CONFERENCE: SCC 2007 GHENT COMPATIBILITY

between the two materials (mechanical, chemical, electrochemical and permeability compatibility) [5]. Specifically, in order to characterize the potential deformation compatibility between concrete substrate and repair material, five main parameters have to be known: shrinkage, E modulus, creep, restraint and tensile strength. That means that a ...

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Chapter 4 Planning and Design of Concrete Repairs

Compatibility is defined as the balance of physical, chemical, and electrochemical properties and dimensions between the repair material and the concrete substrate. This balance is necessary if the repair system ... Permeability. Good quality concrete is relatively impermeable to liquids, but when moisture evaporates at a

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Concrete Repair - National Precast Concrete Association

Jan 08, 2018  ACI 546R-14, “Guide to Concrete Repair,” states the problem of product compatibility in regard to mechanical attributes in strong mixes – such as modulus of elasticity, permeability and thermal expansion – may not be in harmony with the original concrete base.

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Evaluation of Rapid Set Patching Materials for PCC ...

concrete repair. Based on these studies, the compatibility of the repair materials was evaluated and a new test method is proposed to examine the compatibility between repair material and substrate concrete. 17. Key Words Rapid Set Patching, Repair, Concrete, Bridge Decks, Bond Strength, Material Compatibility, Slant Shear Bond Strength 18.

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Research by Shannon Harrel Research and Development Office

Permeability Compatibility Between Concrete Repair Material and Concrete Substrate. Project ID: 1863 Fiscal Years of Funding: 2018 - 2020 Research Results: Permeability Compatibility Between Concrete Repair Material and Concrete Substrate (final, PDF, 1.0MB)

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Code Requirements for Durability - Concrete

• cover — the least distance between the surface of embedded reinforcement and the surface of the concrete (CT) • effective-producing a desired effect (i.e., low permeability, proper thickness, good quality, etc.) • equivalent cover—a system to supplement insufficient concrete

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Compatibility of repair mortars with concrete in a hot-dry ...

Composite cylindrical specimens (half repair mortar/half concrete) were prepared and used for the measurements of modulus of elasticity and shrinkage. The results of the different combined systems were obtained and compared to those calculated using a composite model. The variations between the measured and calculated values were less than 10%.

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Choosing Repair Materials Concrete Construction Magazine

Feb 13, 2013  The durability of a repair depends on proper bond with the substrate and between layers of repair material. Low permeability helps protect against carbonation and chloride ion penetration. Because most repairs are made to older concrete that will not be experiencing drying shrinkage, using repair materials with low shrinkage can help prevent ...

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Patch repair: compatibility issues

permeability, chemical, electrochemical. Recently, the understanding for compatibility re- ... The aim of this paper is analyzing the compatibility between repair materials and concrete substrate in the case of patch repair. The compatibility issues were discussed in light of the various requirements which ... ility between repair material and ...

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Performance Compatability of Permeability Reducing and ...

permeability reducing admixtures at various dose rates. The program included testing of both plastic state and hardened state properties of these concretes to assess the compatibility and impact on performance properties. Both concrete and mortar testing have been undertaken in

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Chapter 4 Planning and Design of Concrete Repairs

Compatibility is defined as the balance of physical, chemical, and electrochemical properties and dimensions between the repair material and the concrete substrate. This balance is necessary if the repair system ... Permeability. Good quality concrete is relatively impermeable to liquids, but when moisture evaporates at a

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"INVESTIGATION INTO COMPATIBILITY BETWEEN REPAIR MATERIAL ...

The failure of concrete repairs is mainly due to improper selection of repair material based on individual repair material properties, without investigating the compatibility between repair material and substrate concrete. In this dissertation the compatibility between eight repair materials and substrate concrete was investigated in three stages.

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Code Requirements for Durability - Concrete

• cover — the least distance between the surface of embedded reinforcement and the surface of the concrete (CT) • effective-producing a desired effect (i.e., low permeability, proper thickness, good quality, etc.) • equivalent cover—a system to supplement insufficient concrete

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Required Properties of Concrete Repair Materials - The ...

It is essential that repair materials should have a very low air/water permeability to provide protection to the reinforced concrete against ingress of harmful chemicals. Aesthetics It is desirable that colour and texture of the repair material should match with the structure and give aesthetically pleasant appearance.

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Evaluation of Rapid Set Patching Materials for PCC ...

concrete repair. Based on these studies, the compatibility of the repair materials was evaluated and a new test method is proposed to examine the compatibility between repair material and substrate concrete. 17. Key Words Rapid Set Patching, Repair, Concrete, Bridge Decks, Bond Strength, Material Compatibility, Slant Shear Bond Strength 18.

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Choosing Repair Materials Concrete Construction Magazine

Feb 13, 2013  The durability of a repair depends on proper bond with the substrate and between layers of repair material. Low permeability helps protect against carbonation and chloride ion penetration. Because most repairs are made to older concrete that will not be experiencing drying shrinkage, using repair materials with low shrinkage can help prevent ...

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RPMTAG Chapter 7 - Partial Depth Concrete Repair

Epoxy mixtures provide a repair material with excellent adhesive properties and low permeability. However, they are not thermally compatible with normal concrete, sometimes resulting in early repair failure. The use of larger aggregate can improve their thermal compatibility with concrete and reduce the risk of debonding.

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Coating Selection and Important Properties of Coatings for ...

in WVT properties of coatings used on concrete, consider the following results of ASTM D1653 testing: 1.Acrylic emulsion coatings used on concrete for exterior architectural purposes need to be very breathable. A typi-cal acrylic coating applied in two coats at 5 mils (125 µm) of dry film thickness (dft) will exhibit a WVT between

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Study on Effect of Polymer on Fibre Reinforced Repair Concrete

Repair Concrete Jatin Zia Sachin Paul ... compatibility between them. ... abrasion and permeability properties of concrete. Based on the experiments conducted, the following conclusions were drawn. 1) There is an inverse relation between Polymer-cement ratio and water-cement ratio.

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Permeability of the bonding interface between strain ...

May 10, 2019  Other studies experimentally investigated the water permeability of the bonding interface between new concrete and existing concrete and found that many factors, such as interface roughness, type of interfacial agents, compressive strength of existing concrete, and curing time, greatly affect the permeability of the bonding surface. 15,16 15. P. X.

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Factors affecting the durability 2.1.1 Dimensional ...

2.1.3 Electrochemical compatibility For each reinforced concrete repair case, electrochemical compatibility must be considered, and an evaluation of the electrochemical behaviour of local (substrate) and potential (repair material) macrocell must be carried out. 2.1.4 Permeability compatibility: a revised viewpoint

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Preservation Brief 15: Preservation of Historic Concrete

Achieving compatibility between repair work and original concrete may be difficult, especially given the variability often present in historic concrete materials and finishes. Formed rather than trowel-applied patch repairs are recommended for durability, as forming permits better ranges of mix ingredients (such as coarse aggregates) and ...

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