Effect of Change in Micro Steel Fiber Content on Properties of High Strength Steel Fiber Reinforced Lightweight Self-Compacting Concrete (HSLSCC)

Iqbal, Shahid; Ali, Ahsan; Holschemacher, Klaus; Bier, Thomas

doi:10.1016/j.proeng.2015.10.011

Cited by 28 publications

(18 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Steel fiber reinforced SCC with slump flow in the range of 560-700 mm, without segregation, have been produced in a previous research work [26]. A decrease of 10.5 % in the slump flow by addition of 0.75 % steel fibers to SCC have been reported by a previous research [27], which is in agreement with the current study.…”

Section: Fresh Concrete Propertiessupporting

confidence: 91%

An Experimental Study of Bond Behavior of Micro Steel Fibers Added Self-compacting Concrete with Steel Reinforcement

Salam

Room

Iqbal

et al. 2020

Period. Polytech. Civil Eng.

Self Cite

View full text Add to dashboard Cite

The obstruction offered by the surrounding concrete to the pulling out of embedded steel bar is known as bond strength. Steel fibers addition to concrete improves its bond strength by arresting the cracks due to their bridging effect. Bond failure occurs when cracks in the surrounding concrete initiates, providing enough space for bar to be pulled-out. Micro steel fibers efficiently control the formation of micro cracks and may improve bond strength to a greater extent compared to the longer steel fibers. However, it reduces the workability of concrete which is of greater importance in case of self-compacting concrete (SCC). Reduction of workability is less pronounced when straight micro steel fibers are used due to their shorter lengths and straight geometry. Thus, different amount of straight micro steel fibers (0.25 %, 0.5 %, 0.75 %) were incorporated in to SCC to investigate their fresh and mechanical properties with major emphasis on the bond strength. Results indicate that steel fibers addition to SCC improve the splitting tensile strength and bond strength significantly with a maximum increase of 33.5 % and 54.9 % respectively with 0.75 % fibers addition. An equation is proposed for the calculation of bond strength with micro steel fibers addition to SCC with a maximum variation of 4 % to those of experimental values.

show abstract

Section: Fresh Concrete Propertiessupporting

confidence: 91%

An Experimental Study of Bond Behavior of Micro Steel Fibers Added Self-compacting Concrete with Steel Reinforcement

Salam

Room

Iqbal

et al. 2020

Period. Polytech. Civil Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Adding conductive filler reduces the percolation concentration, which is the lowest concentration of filler at which insulating material is converted to conductive material. Several conductive fillers have been investigated including carbon nanotubes, carbon fiber and graphite, however micro steel fibers were chosen for their outstanding properties, including higher abrasion resistance; resistance to micro crack propagation; improvements to the tensile and flexural strength by 120% and 25%, respectively, from adding 0.53% of steel fiber (60-µm diameter and 5-mm length); non-hazardous to work with; relatively cheap (around $0.1 per gram); provides low electrical resistivity; and enhances its sensitivity to the presence of chloride [ 33 , 34 , 35 , 36 ]. The micro steel fibers can also be used to evaluate stress, strain and crack propagation or damage of the blocks [ 37 , 38 , 39 , 40 , 41 ].…”

Section: Sensing Elementmentioning

confidence: 99%

Miniature Resistance Measurement Device for Structural Health Monitoring of Reinforced Concrete Infrastructure

Corva

Hosseini

Collins

et al. 2020

Sensors

View full text Add to dashboard Cite

A vast amount of civil infrastructure is constructed using reinforced concrete, which can be susceptible to corrosion, posing significant risks. Corrosion of reinforced concrete has various causes, with chloride ingress known to be a major contributor. Monitoring this chloride ingress would allow for preventative maintenance to be less intrusive at a lower cost. Currently, chloride sensing methods are bulky and expensive, leaving the majority of concrete infrastructures unmonitored. This paper presents the design and fabrication of a miniature, low-cost device that can be embedded into concrete at various locations and depths. The device measures localized concrete resistance, correlating to the chloride ingress in the concrete using equations listed in this paper, and calculated results from two experiments are presented. The device benefits from a four-probe architecture, injecting a fixed frequency AC waveform across its outer electrodes within the cement block. Voltage across the internal electrodes is measured with a microcontroller and converted to a resistance value, communicated serially to an external computer. A final test showcases the ability of the device for three-dimensional mass deployment.

show abstract

“…W Polsce z uwagi na brak krajowych producentów tego typu dodatku do betonu przed długi czas nie stosowano go zbyt powszechnie. Wiele analiz [10][11][12] jednoznacznie potwierdza ogromne korzyści konstrukcyjne oraz ekonomiczne wynikające ze stosowania włókien jako zbrojenia rozproszonego. Istotne są także badania nad pozostałymi cechami towarzyszącymi bezpośrednio mrozoodporności (nasiąkliwość, porowatość).…”

Section: Wprowadzenieunclassified

Mrozoodporność Betonów Ze Zbrojeniem Rozproszonym

Borowska¹,

Kosior‐Kazberuk²

2019

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

View full text Add to dashboard Cite

W pracy przedstawiono porównanie odporności na powierzchniowe łuszczenie pod wpływem oddziaływania mrozu betonów zawierających trzy typy zbrojenia rozproszonego (włókna syntetyczne, makro-i mikrowłókna stalowe) zastosowane w ilości 0,5 oraz 1,0% objętości mieszanki betonowej, a także betonów bez włókien. Badanie prowadzono na podstawie normy PKN-CEN/TS 12390-9: (2007), metodą Slab test, w warunkach cyklicznych zmian temperatury, w obecności 3% roztworu solnego. Na podstawie wyników badania mrozoodporności określono najbardziej efektywny rodzaj dodatku do betonu w postaci włókien oraz korzystną zawartość. Wykonano dodatkowe badania właściwości fizycznych betonów, takich jak: nasiąkliwość, podciąganie kapilarne roztworu NaCl, gęstość objętościowa.

show abstract

Effect of Change in Micro Steel Fiber Content on Properties of High Strength Steel Fiber Reinforced Lightweight Self-Compacting Concrete (HSLSCC)

Cited by 28 publications

References 3 publications

An Experimental Study of Bond Behavior of Micro Steel Fibers Added Self-compacting Concrete with Steel Reinforcement

An Experimental Study of Bond Behavior of Micro Steel Fibers Added Self-compacting Concrete with Steel Reinforcement

Miniature Resistance Measurement Device for Structural Health Monitoring of Reinforced Concrete Infrastructure

Mrozoodporność Betonów Ze Zbrojeniem Rozproszonym

Contact Info

Product

Resources

About