Correlation between concrete-to-concrete bond strength and the roughness of the substrate surface

Santos, Pedro; Júlio, Eduardo; Silva, Vı ́tor D.

doi:10.1016/j.conbuildmat.2006.05.044

Cited by 220 publications

(93 citation statements)

References 4 publications

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“…Moreover, increasing roughness promotes adhesion due to better mechanical interlocking for high strength concrete substrates [5]. This is confirmed by Santos et al [6] The fundamental objective of this research project is to estimate the quality of concrete substrate and to evaluate its surface roughness by means of quantitative parameters with regard to adhesion. In the present paper, influence of substrate quality resulting from different surface treatments is particularly analyzed and mathematical relations between surface properties and bond strength are established.…”

Section: Fig1 Factors Affecting Bond Between Concrete Substrate and mentioning

confidence: 56%

“…Many approaches are valuable to quantify surface roughness [6,16,18]. EN 1504 [10] recommends visual observation, the use of a profile meter or sand test for this purpose.…”

Section: Roughnessmentioning

confidence: 99%

“…Calculation of statistical and amplitude distribution parameters of the profile allows a quantitative and objective evaluation of the surface geometry [22]. Profile can be obtained by means of profilometers (mechanical and laser) or digitalization of the cross-section image [6,16]. A combination of profiles can be also extended onto surfometry, resulting in a 3D image of the real surface [23].…”

Section: Fig2 Sand Test For Surface Roughness Evaluationmentioning

confidence: 99%

“…Treatment of concrete substrate is commonly used for cleaning, removing laitance layer and roughening the surface. However, it can induce microcracking if it is not well operated with regard to the quality and the strength of concrete [4][5][6]. Even if roughening is not considered as the most important factor for interface quality [2], it seems however to influence bond strength.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Near-to-surface properties affecting bond strength in concrete repair

Courard

Piotrowski

Garbacz

2014

Cement and Concrete Composites

155

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Abstract:One of the main processes for repairing concrete structures is patch repair.Efficiency and durability of a repaired system depends on the bond between concrete substrate and repair material. By increasing the surface roughness, the surface treatment of concrete substrate can promote mechanical interlocking that is one of the basic mechanisms of adhesion. Nevertheless, some problems may arise from "co-lateral" effects of the treatment, especially due to the development of microcracks inside the substrate. In the presented paper, the effect of concrete substrate surface preparation has been characterized by roughness measurement, description of microcracking in the near-to-surface layer and a pull-off cohesion test. After repair, pull-off bond strength has been evaluated. It is concluded that selection of a suitable surface treatment technique should be preceded by the analysis of its aggressiveness in relation to the concrete substrate strength. A procedure for bond strength estimation using multiple regression approach, based on parameters describing surface quality really generated from various roughening techniques, is then proposed.

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Section: Fig1 Factors Affecting Bond Between Concrete Substrate and mentioning

confidence: 56%

“…Many approaches are valuable to quantify surface roughness [6,16,18]. EN 1504 [10] recommends visual observation, the use of a profile meter or sand test for this purpose.…”

Section: Roughnessmentioning

confidence: 99%

Section: Fig2 Sand Test For Surface Roughness Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Near-to-surface properties affecting bond strength in concrete repair

Courard

Piotrowski

Garbacz

2014

Cement and Concrete Composites

155

View full text Add to dashboard Cite

show abstract

“…Even sometimes before application of FRP, some investigations have been carried out about effect of surface coarseness on concrete adhesion strength to concrete (Wambold and Henry, 1982;Abu-Tair et al, 2000;Talbot et al, 1994;Julio et al, 2004;Santos and Julio, 2007). There are some studies (Toutanji and Ortiz, 2001;Mitsui et al, 2000;Matana et al, 2005;Myers et al, 2007;Li and Ghebreyesus, 2006;Seo et al, 2012;Yuan et al, 2012;Chen and El-Hacha, 2013) regarding effect of surface preparation in application of FRP where the results of these studies signify that preparation of surfaces by means of water pressure and sandblasting techniques are best methods for creating efficient adhesion For FRP on bedding concrete.…”

Section: Introductionmentioning

confidence: 99%

The analysis of efficiency of GFRP and CFRP covers to reinforce concrete beams under various conditions

Khamesi

2016

Int. j. adv. appl. sci

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Application of Fibre Reinforced Plastic (FRP) composites has been very widely developed for seismic reclamation during recent years. One of the important reasons that may be implied for selection of these materials is the high tensile strength, low-weight, and also flexibility of the system in these materials and very high durability of them. Rather than describing of installation technique of recent studies, it has been dealt with bending-shear behavior in the reinforced concrete beams with Glass-Fibre Reinforced Plastic (GFRP) and Carbon Fibre Reinforced Plastic (CFRP) composites. For this purpose, the concrete reinforced beams have been analyzed by various techniques and using built-in glass and carbon fibers. The carbon-fiber built samples without the end brace and other samples with end-brace were anchored by glass fibers. Similarly, glass-fiber reinforced plastic (GFRP) beams were built with and without bracing at end and reserved under laboratory conditions. These fibers have been installed in tensile point of beams and by means of epoxy adhesive and also one sample was built as control beam without using fibre. On the other hand, some solid and hollow beams were prepared as well. The results of experiments indicate that rates of rising strength for non-bracing carbon and glass were about 19-40% and 8-43% respectively and the strength were increased for braced carbon and glass 17-75% and 10-82% respectively. In hollow cylindrical column enclosed the compressional strength has increased 66% in one CFRP layer, 96% in two CFRP layers, and 123% in three CFRP layers while application of GFRP has increased compressional strength up to 36% in one GFRP layer, 63% in two GFRP layers, and 105% in three GFRP layers for hollow cylindrical column. In solid cylindrical enclosed by one CFRP layer the compressional strength has increased 71%, 138% in two CFRP layers, and 154% in three CFRP layers while application of one GFRP layer has increased compressional strength 45% and in two layer GFRP layer 79% and in three GFRP layers it has been increased up to 144% for solid cylindrical column. The rate of increase in final resistance at beams reinforced by bending-shear strength is greater than final resistance in other beams.

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Design recommendations for interface shear transfer in fib Model Code 2010

Randl

2013

Structural Concrete

105

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Interface shear transfer between differently aged concretes is a topic that crops up frequently and in different situations in structural design. In the fib Model Code for Concrete Structures 2010 the fundamental basics of concrete‐to‐concrete load transfer are given in section 6.3 and the corresponding design rules in 7.3.3.6. The different potential mechanisms contributing to the shear resistance along the interface, i.e. adhesive bond, aggregate interlock, friction and dowel action, are thus combined and their relationship taken into account by interaction factors. This article summarizes the most important results from past and ongoing studies and presents the background to the theory forming the design basis of fib Model Code 2010, the “extended shear friction theory” (ESF).

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Correlation between concrete-to-concrete bond strength and the roughness of the substrate surface

Cited by 220 publications

References 4 publications

Near-to-surface properties affecting bond strength in concrete repair

Near-to-surface properties affecting bond strength in concrete repair

The analysis of efficiency of GFRP and CFRP covers to reinforce concrete beams under various conditions

Design recommendations for interface shear transfer in fib Model Code 2010

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