Effect of steel fibers on the mechanical properties of natural lightweight aggregate concrete

Düzgün, Oğuz Akın; Gül, Rüstem; Aydın, Abdulkadir Cüneyt

doi:10.1016/j.matlet.2005.05.071

Cited by 139 publications

(44 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…AC can be used to decrease the dead load, earthquake effect and the size of building members. Thus, foundations become more economical and the building cost is decreased [5,6]. However, this type of concrete has lower mechanical properties and additional cement is required for the same strength as a normal concrete [7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of lightweight aerated concrete with different aluminium powder content

Shabbar

Nedwell

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. Aerated concrete is produced by introducing gas into a concrete, the amount dependent upon the requirements for strength. One method to achieve this is by using powdered aluminium which reacts with the calcium hydroxide produced upon hydration of the cement. The aim of the current study was to investigate the influence of the powder content on the mechanical properties of aerated concrete namely; compressive and flexural strengths, modulus of elasticity, density and porosity. The results indicated that an increase in aluminium content caused a decrease in the compressive and tensile strengths. It also produced a decrease in the modulus of elasticity. When the aluminium content increased, the density decreased and the porosity increased.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanical properties of lightweight aerated concrete with different aluminium powder content

Shabbar

Nedwell

2017

MATEC Web Conf.

View full text Add to dashboard Cite

show abstract

“…Lightweight aggregate concrete (LWC) has been widely used in recent years due to its high porosity, low density, frost resistance, and favorable heat retaining property (8,(10)(11)(12)(13)(14). In the northern area of China, the damage to hydraulic concrete, such as dams (see Figure 1), is relatively large owing to cyclic freezing and thawing.…”

Section: Introductionmentioning

confidence: 99%

“…Alengaram and Khokhrin (4,17) found that, at a strength level of 30-40 MPa, the water permeability of LWC was lower than that of corresponding conventional concrete. Numerous other studies (9,10,12,18,19) have shown that the use of fibers in LWC is an appropriate solution to resolve problems associated with the material's higher brittleness and reduced mechanical properties. For example, researchers (5,6) have investigated the use of oil palm shell as an additive fiber for LWC, and the Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete • 3 production of medium and high strength LWC was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete

et al. 2016

View full text Add to dashboard Cite

This paper presents an analysis of the damage propagation features of the pore structure of natural pumice lightweight aggregate concrete (LWC) under freeze-thaw cyclic action. After freeze-thaw cycling, we conducted nuclear magnetic resonance (NMR) tests on the concrete and acquired the porosity, distribution of transverse relaxation time T 2 , and magnetic resonance imaging (MRI) results. The results showed the following. The T 2 distribution of the LWC prior to freeze-thaw cycling presented four peaks representative of a preponderance of small pores. After 50, 100, 150, and 200 freeze-thaw cycles, the total area of the T 2 spectrum and the porosity increased significantly. The MRI presented the changing spatial distribution of pores within the LWC during freeze-thaw cycling. Ultrasonic testing technology was applied simultaneously to analyze the NMR results, which verified that the new NMR technology demonstrated high accuracy and practicability for research regarding freeze-thaw concrete damage. RESUMEN:Análisis por resonancia magnética nuclear del deterioro en hormigón con piedra pómez tras ciclos hielo-deshielo.En este trabajo se analiza la propagación de los daños que se producen en la estructura porosa de hormigón aligerado a base de piedra pómez natural sometido a la acción cíclica de hielo-deshielo. Después de realizarse los ensayos de hielo-deshielo, el hormigón se analizó mediante resonancia magnética nuclear (RMN), determinándose la porosidad y la distribución del tiempo de relajación transversal, T 2 , y registrándose las imá-genes captadas por resonancia magnética. De acuerdo con los resultados obtenidos, antes de los ciclos de hielodeshielo la distribución de T 2 del hormigón aligerado presentaba cuatro picos, indicativos de un predominio de poros pequeños. Después de que se sometiera a 50, 100, 150, y 200 ciclos, se observó un aumento importante tanto de la porosidad como de la superficie total del espectro de T 2 . Las imágenes captadas por resonancia magnética evidenciaron la modificación de la distribución espacial de los poros del hormigón aligerado durante el ensayo. Por otra parte, mediante la comprobación por técnicas de prospección ultrasónica se confirmó que la nueva tecnología RMN es de alta precisión y gran practicidad en la investigación de los daños producidos en el hormigón por los ciclos de hielo-deshielo.

show abstract

“…1,2 . Structural lightweight concrete is a popular material in construction industry due to some substantial benefits such as good tensile capacity, low coefficient of thermal expansion and superior heat as well as sound insulation capability [2][3][4][5][6][7] . Furthermore, using lightweight concrete in construction decreases the dead load of the structures and further earthquake forces which reduce the risk for human's life.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, using lightweight concrete in construction decreases the dead load of the structures and further earthquake forces which reduce the risk for human's life. This feature allows to decrease the dimensions of structural and non-structural sections and cost of the construction 4,[8][9][10] . Nonetheless, there are some defects in mechanical properties of lightweight concretes, which have prevented it from being used as load bearing structural members in construction industry 3,11,12 .…”

Section: Introductionmentioning

confidence: 99%

Waste steel wires modified structural lightweight concrete

Aghaee

Yazdi

2014

Mat. Res.

View full text Add to dashboard Cite

Nowadays, the use of different waste fibers in concrete has started to increase rapidly due to some reasons such as economic savings and positive effects on the environment. In this study, waste steel wires taken from reinforcement and formwork which were previously utilized in construction projects, were employed in structural lightweight concrete (SLWC). The objective was to investigate the possibility of using this type of fiber as reinforcement in the SLWC. Compressive, tensile, flexural and impact tests were performed for investigating the mechanical properties of 28-day reinforced lightweight concrete specimens with the waste wires. The percentage of wire in the fiber reinforced concrete (FRC) was 0.25%, 0.5% and 0.75% in the volume fraction of the concrete. According to the results, by using waste wires, flexural, tensile and impact characteristics of SLWC were effectively improved. Moreover, it was concluded that waste steel wires could be used as a suitable micro reinforcement in the SLWC.

show abstract

Effect of steel fibers on the mechanical properties of natural lightweight aggregate concrete

Cited by 139 publications

References 7 publications

Mechanical properties of lightweight aerated concrete with different aluminium powder content

Mechanical properties of lightweight aerated concrete with different aluminium powder content

Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete

Waste steel wires modified structural lightweight concrete

Contact Info

Product

Resources

About