Mechanical properties of expanded polystyrene lightweight aggregate concrete and brick

Xu, Yi; Jiang, Linhua; Xu, Jianhong; Li, Yang

doi:10.1016/j.conbuildmat.2011.08.030

Cited by 191 publications

(85 citation statements)

References 18 publications

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“…Structural lightweight concrete has many advantages: it provides a more efficient strength to weight ratio in structural elements, and thus allows designers to reduce the size of columns, footings and other bearing elements. Furthermore, it has superior thermal insulation characteristics and high-fire resistance than normal weight concrete (Khandaker & Anwar, 2004;Xu, Jiang, Xu, & Li, 2012).…”

Section: Introductionmentioning

confidence: 99%

Flexure strengthening of lightweight reinforced concrete beams using carbon fibre-reinforced polymers

Shannag

Al-Akhras

Mahdawi

2013

Structure and Infrastructure Engineering

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A series of 40 lightweight reinforced concrete (LWRC) beams of 1400 mm length and a rectangular cross section of 150 £ 200 mm were cast, strengthened and then tested under four-point bending test to study the effectiveness of using externally applied carbon fibre-reinforced polymer (CFRP) composites as a method of increasing the flexural strength of under-reinforced LWRC beams. Parameters investigated include reinforcement ratio, r; r ¼ 0.55r b and r ¼ 0.27r b , CFRP sheet length; 600, 800 and 1000 mm, CFRP sheet width; beam width and half-beam width. Three types of strengthening schemes were used: jacketing covers the beam from bottom and two sides with total width of 500 mm, sheets at the tension side with width equal to beam width and sheets with width equal to half-beam width. Test results showed a limited increase in ultimate load-carrying capacity accompanied with some reduction in mid-span deflection for the strengthened beams. Among the strengthening schemes investigated, jacketing was the most effective for strength enhancement (about 41%) with respect to control beam; however, it reduced ductility significantly. An analytical model was proposed for predicting the ultimate load-carrying capacity of LWRC beams strengthened with CFRP composites.Keywords: carbon fibre-reinforced polymers; lightweight concrete beams; flexure strength; strengthening Abbreviations: r, steel reinforcing ratio; CFRPs, carbon fibre-reinforced polymers; LWRC, lightweight reinforced concrete; F, diameter of reinforcing steel; r b , balanced steel ratio; 1 c , concrete strain; 1 cu , maximum usable compressive strain in concrete; h, overall thickness of a member in mm; c, distance from extreme compression fibre to the neutral axis in mm; 1 fu , design rupture strain of FRP; 1 0 s , strain level in compression steel; d 0 , depth of compression steel in mm; E s , modulus of elasticity of steel reinforcement in MPa; A s , area of tension steel in mm 2 ; A 0 s , area of compression steel in mm 2 ; A f , area of FRP reinforcement in mm 2 ; f 0 c , compressive strength of concrete in MPa; b, width of concrete cross section in mm; b 1 , 0.8 for concrete compressive strength of 35 MPa; c, additional reduction factor of the flexural strength contribution of FRP; X, distance between supports and loading point in m

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Section: Introductionmentioning

confidence: 99%

Flexure strengthening of lightweight reinforced concrete beams using carbon fibre-reinforced polymers

Shannag

Al-Akhras

Mahdawi

2013

Structure and Infrastructure Engineering

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“…8. The recycled foam is normally weaker than the geopolymer matrix and the increased amount thus reduced the strength of geopolymer lightweight concrete [7,[40][41][42]. The density decreased with the increase in RF content as the density of RF was only 215 kg/m 3 compared with that of geopolymer concrete of 2030 kg/m 3 .…”

Section: Foam Contentmentioning

confidence: 90%

Properties of lightweight high calcium fly ash geopolymer concretes containing recycled packaging foam

Posi

Ridtirud

Ekvong

et al. 2015

Construction and Building Materials

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“…Spherical EPS inclusions are also widely used to produce lightweight cement-based composites (Madandoust et al 2011;Xu et al 2012;Bouvard et al 2007;Guan et al 2007). These composites have lower density, better thermal insulation and energy absorption.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Loads on the Properties of Lightweight Composite

Kligys

Sinica

Sezemanas

et al. 2012

Journal of Civil Engineering and Management

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The paper describes the study on the operational properties of lightweight composite with density of 150-350 kg/m 3 . It was established that these properties depend on the ratio of porous cement matrix and inclusions of crushed expanded polystyrene packing tare waste per unit volume of the lightweight composite. Studies have demonstrated that when the density of lightweight composite varies in the above mentioned limits, the compressibility amounts to 2.4-0.8 mm, point load -0.38-3.39 kN, dynamic stiffness -35-135 MN/m 3 , and reduction in normalised impact sound pressure level -26-17 dB. The dependences between the established properties and the density of lightweight composite are showed in the equations of regression. Possible versions for the use of lightweight composite in different constructions of floors and roofs are also provided.

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Mechanical properties of expanded polystyrene lightweight aggregate concrete and brick

Cited by 191 publications

References 18 publications

Flexure strengthening of lightweight reinforced concrete beams using carbon fibre-reinforced polymers

Flexure strengthening of lightweight reinforced concrete beams using carbon fibre-reinforced polymers

Properties of lightweight high calcium fly ash geopolymer concretes containing recycled packaging foam

Influence of Different Loads on the Properties of Lightweight Composite

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