Evaluation of Bond Strength between Normal Concrete Substrate and Ultra High Performance Fiber Concrete as a Repair Material

High Performance Fiber Reinforced Concrete (HPFRC) has been proposed to be used as a repair material for the deterioration of concrete structure since its very low porosity that leads to a low permeability and high durability. This characteristic makes it suitable for rehabilitation and retrofitting reinforced concrete structures or for as a new repair material. The bond strength between HPFRC and old concrete should have a good bond strength, thus surface preparation method and curing method can help strengthen the bond strength between HPFRC and normal concrete. This paper was performed to study the effect of surface preparation and curing method on the bond strength between HPFRC and normal concrete. In this study, three surface preparations were prepared: sandblasting, grooved and drill hole. Then, the curing methods that were performed in this study are ambient curing and water curing. The tests that were conducted to evaluate the bond strength between HPFRC and normal concrete are slant shear test and splitting tensile test. The result from this study shows that sandblasting gave the highest bond strength result between normal concrete and HPFRC. For the curing method, water curing gives the highest bond strength between normal concrete and HPFRC.

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Evaluation of bond strength between fire-damaged normal concrete substance and ultra-high-performance fiber-reinforced concrete as a repair material

World Journal of Engineering ◽

10.1108/wje-06-2016-0014 ◽

2016 ◽

Vol 13 (5) ◽

pp. 461-466 ◽

Cited By ~ 1

Author(s):

Nur Khaida Baharuddin ◽

Fadzli Mohamed Nazri ◽

Ramadhansyah Putra Jaya ◽

Badorul Hisyam Abu Bakar

Keyword(s):

Bond Strength ◽

High Performance ◽

Fiber Reinforced Concrete ◽

Repair Material ◽

Interfacial Bond ◽

Normal Concrete ◽

Content Type ◽

Surface Moisture ◽

High Performance Fiber ◽

Moisture Conditions

Purpose This study aims to investigate and compare the interfacial bond characteristics between fire-damaged normal concrete substrate and ultra-high-performance fiber-reinforced concrete (UHPFRC) as a repair material. Design/methodology/approach First, fire-damaged normal concrete was prepared. Then, with a cast surface, the substrate was subjected to different surface moisture conditions. Three types of moisture conditions were set, namely, air dry, saturated surface dry (SSD) and wet. Slant shear and splitting cylinder tests were conducted to determine the interfacial bond strength of the composite. Findings In general, results indicate that surface moisture conditions significantly influence bond strength. The substrate under SSD condition exhibited the highest bond strength. The findings suggest that UHPFRC is a promising material for the repair and reuse of fire-damaged concrete structures. Originality/value This study compares the bond strength between fire-damaged normal concrete and UHPRC.

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Mechanical and permeability properties of the interface between normal concrete substrate and ultra high performance fiber concrete overlay

Construction and Building Materials ◽

10.1016/j.conbuildmat.2012.06.013 ◽

2012 ◽

Vol 36 ◽

pp. 538-548 ◽

Cited By ~ 118

Author(s):

Bassam A. Tayeh ◽

B.H. Abu Bakar ◽

M.A. Megat Johari ◽

Yen Lei Voo

Keyword(s):

High Performance ◽

Normal Concrete ◽

Fiber Concrete ◽

High Performance Fiber

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UHPFRC as Repair Material for Fire-Damaged Reinforced Concrete Structure – A Review

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.802.283 ◽

2015 ◽

Vol 802 ◽

pp. 283-289 ◽

Cited By ~ 5

Author(s):

Muhd Afiq Hizami Abdullah ◽

Mohd Zulham Affandi Mohd Zahid ◽

Badorul Hisham Abu Bakar ◽

Fadzli Mohamed Nazri ◽

Afizah Ayob

Keyword(s):

Reinforced Concrete ◽

Concrete Structure ◽

High Performance ◽

Steel Fibre ◽

High Strength ◽

Fiber Reinforced Concrete ◽

Repair Material ◽

Reinforced Concrete Structure ◽

Normal Concrete ◽

High Performance Fiber

Exposure of concrete to intense heat will cause deterioration of its strength and durability. Previously, the fire-damaged concrete was repaired using the shotcrete and normal concrete. Recent studies utilize fibre reinforced polymer (FRP) in repairing fire-damaged concrete. Ultra High Performance Fiber Reinforced Concrete (UHPFRC) mostly developed using fine size aggregate, cement, silica fume, super plasticizer and reinforced with steel fibre has an excellent mechanical properties compared to high strength concrete and with an addition of steel fibre in the UHPFRC enhances its ductility behaviour which is not possessed by normal concrete, hence, UHPFRC indicates a promising candidate as repair material to fire-damaged concrete. The aim of this paper is to review on the properties of UHPFRC to be utilized as repair material to fire-damaged concrete structure based on previous research on UHPFRC and fire-damaged structure.

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