Bond strength of the interface between normal concrete substrate and GUSMRC repair material overlay

Sabah, S.H. Abo; Hassan, Mohd Sayuti; Bunnori, Norazura Muhamad; Johari, Megat Azmi Megat

doi:10.1016/j.conbuildmat.2019.04.270

Cited by 56 publications

(17 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cubic compressive strength of the old concrete and the new concrete were 30 N/mm 2 and 35 N/mm 2 , respectively. The type of ordinary Portland cement used was P.O42.5, with the density of 3.16 g/cm 3 . Coarse aggregate is 5-20 mm gravel, and fine aggregate is river sand (fineness modulus = 2.7).…”

Section: Specimens Preparationmentioning

confidence: 99%

“…Identification, evaluation, reinforcement and repair of aging concrete structures has become a popular industry [1]. With the increase of the application scope and field of concrete materials and the improvement of engineering quality requirements, the durability problems of concrete-to-concrete structures are gradually exposed [2,3]. The construction industry in many countries has entered the period of maintenance and renovation [4].…”

Section: Introductionmentioning

confidence: 99%

“…A bonding interface is thus formed between the repair material and the concrete substrate. The bonding interface is the weakest part in the repaired structure, and the bonding property is critical for the performance of repaired structure [3,4,[7][8][9]. Efficient and durable concrete repair can extend the service life of concrete structure and ensure the long-term durability [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Fan

Zhang

2021

Materials

View full text Add to dashboard Cite

The bonding surface structure generated by the repair of concrete structures has been paid more attention as a weak point. The effects of old concrete age, interface roughness, and freeze-thawing (F-T) attack on adhesive interface are comprehensively investigated. In this study, six kinds of interface roughness and five different old concrete age are designed. The interfacial bonding property is mainly evaluated by splitting tensile strength (fts). Fractal analysis was used to characterize the interface roughness using laser scanning data. In general, the fts increased with the increasing value of interface fractal dimension. The relationship between fts and fractal dimension value was further analyzed, considering the old concrete ages and the F-T cycles. The results show that the effect of roughness on the bonding property of new-to-old concrete is more significant than the age of old concrete, and the influence of the F-T cycles on the bonding surface is mainly reflected in the initial stage of the F-T deterioration process. The relative dynamic elasticity modulus decreased obviously under F-T cycles, especially for the specimens with low interface roughness. In combination with the results of two non-destructive methods (ultrasonic non-destructive test and relative dynamic elastic modulus test), the larger roughness and the smaller age of old concrete can improve the bond performance.

show abstract

Section: Specimens Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Fan

Zhang

2021

Materials

View full text Add to dashboard Cite

show abstract

“…What is more, surface exposure of the coarse aggregate of the substrate, and strengthening of the surface of the concrete substrate, are frequently done [20,21,22]. Increasingly, various additives are also being used to modify the material of the cement mortar used to make the overlay [23,24,25,26,27,28,29,30,31,32]. For example, Luković et al [33] recently used blast furnace slag to replace part of the Portland cement in repair overlay.…”

Section: Introductionmentioning

confidence: 99%

The Development of Nanoalumina-Based Cement Mortars for Overlay Applications in Concrete Floors

Szymanowski

Sadowski

2019

Materials

View full text Add to dashboard Cite

This article focuses on the development of nanoalumina-based cement mortars for overlay applications in concrete floors. It focuses on the effect of applying aluminum oxide (Al2O3) nanopowder to the cement mortar used to make the overlay, on the adhesion of this overlay to concrete substrate and on its functional properties. It was claimed that the addition of 0.5% of Al2O3 nanopowder has a positive effect on the adhesion of the cement mortar used to make the overlay to the substrate made of concrete. The prior studies performed using scanning electron microscopy (SEM) confirmed that the reason for the improvement in adhesion is the fact that cement mortar used to make the overlay with the addition of 0.5% of Al2O3 nanopowder is less porous than the reference mortar within the interphase. The article concurs that the most favorable results, in terms of lower abrasion resistance and higher subsurface tensile strength of the cement mortar used to make the overlay, are mainly brought about by adding 0.5% of Al2O3 nanopowder.

show abstract

“…Abo Sabah et al investigated the possibility of employing GUSMRC as a repair material and found that it has an excellent potential for concrete repair application. Hassan and Bunnori studied the fluid transport properties between NC substrate and GUSMRC.…”

Section: Introductionmentioning

confidence: 99%

Interfacial behavior between normal substrate and green ultra‐high‐performance fiber‐reinforced concrete under elevated temperatures

Sabah

Zainal

Bunnori

et al. 2019

Structural Concrete

View full text Add to dashboard Cite

This study assesses the effects of elevated temperatures (100, 200, 300, 400, and 500°C) on the bonding behavior of normal concrete (NC) substrate as old concrete and the new Green Universiti Sains Malaysia Reinforced Concrete (GUSMRC) as a repair material through slant shear, pull‐off, splitting tensile, and flexural tests. Sandblasting (SB) and grinding (GR) surface treatments were employed to enhance the bond strength of the NC/GUSMRC composite. The research also evaluates the mechanical characteristics of the GUSMRC mix which 50% of its content is ultrafine palm oil fuel ash prior to and after the exposure to elevated temperatures. The results showed degradation in the mechanical properties of the monolithic GUSMRC and the bonding strength of the NC/GUSMRC composite after exposure to elevated temperatures; however, the bonding quality is excellent. Moreover, the SB surface treatment enhanced the interfacial bonding more than the GR surface treatment before and after elevated temperature exposure.

show abstract

Bond strength of the interface between normal concrete substrate and GUSMRC repair material overlay

Cited by 56 publications

References 34 publications

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

Influence of Old Concrete Age, Interface Roughness and Freeze-Thawing Attack on New-to-Old Concrete Structure

The Development of Nanoalumina-Based Cement Mortars for Overlay Applications in Concrete Floors

Interfacial behavior between normal substrate and green ultra‐high‐performance fiber‐reinforced concrete under elevated temperatures

Contact Info

Product

Resources

About