Response of precast foamed concrete sandwich panels to flexural loading

Amran, Mugahed; Rashid, Raizal Saifulnaz Muhammad; Hejazi, Farzad; Safiee, Nor Azizi; Ali, Aidy

doi:10.1016/j.jobe.2016.06.006

Cited by 75 publications

(37 citation statements)

References 22 publications

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“…Axel Erikson was the first to patent Portland cement-based FC technology in the year 1923 [ 9 , 42 , 43 ]. The characteristics, behaviour and structural applications of FC have been widely investigated by many researchers [ 2 , 6 , 7 , 14 , 18 , 44 , 45 ]. FC is reportedly proved to be superior to conventional concrete mainly due to its lower density, which helps in reducing the static construction loads, foundation volume, labour, transportation, and exploitation expenses, respectively [ 10 , 46 , 47 , 48 ].…”

Section: Foam Concrete: a Prefacementioning

confidence: 99%

“…Developments in mechanical and chemical foaming methods, admixtures of cement composite, and other additives considerably amended FC’s constancy and hardened properties [ 75 , 219 ]. Simultaneously, the appropriate use of FC for structural concrete utilizations is well-known, and many investigation works have been concentrated on enhancing its mechanical properties [ 6 , 7 , 10 , 14 , 15 , 55 , 75 , 218 , 219 , 220 ]. However, FC’s application has been noticeable as widespread applications internationally, particularly in distress from housing scarcities or endangered to adverse climate, storms and tremors [ 42 ].…”

Section: Applications Of Frfcmentioning

confidence: 99%

“…The basis for developing a wide range of these lightweight composites is pure cement combined with fine sand and discrete, evenly spaced, micro or macroscopic air cells [ 5 , 10 , 13 ]. As a result, FC provides the above advantages, reduces construction expenses and allows for sustainable designs with low weight [ 7 , 14 , 15 , 16 ]. Often, foamed concrete produced under construction site conditions shows terrible compressive strength, up to 9 MPa, does not allow its use as a material for supporting structures [ 5 , 8 , 10 , 13 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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Foamed concrete (FC) is a high-quality building material with densities from 300 to 1850 kg/m3, which can have potential use in civil engineering, both as insulation from heat and sound, and for load-bearing structures. However, due to the nature of the cement material and its high porosity, FC is very weak in withstanding tensile loads; therefore, it often cracks in a plastic state, during shrinkage while drying, and also in a solid state. This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC). For this purpose, various foaming agents, fibres and other components that can serve as a basis for FRFC are reviewed and discussed in detail. Several factors have been found to affect the mechanical properties of FRFC, namely: fresh and hardened densities, particle size distribution, percentage of pozzolanic material used and volume of chemical foam agent. It was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam; therefore, it is necessary to apply an additional dosage of a foam agent to enhance the adhesion and cohesion between the foam agent and the cementitious filler in comparison with materials without fibres. Various types of fibres allow the reduction of by autogenous shrinkage a factor of 1.2–1.8 and drying shrinkage by a factor of 1.3–1.8. Incorporation of fibres leads to only a slight increase in the compressive strength of foamed concrete; however, it can significantly improve the flexural strength (up to 4 times), tensile strength (up to 3 times) and impact strength (up to 6 times). At the same time, the addition of fibres leads to practically no change in the heat and sound insulation characteristics of foamed concrete and this is basically depended on the type of fibres used such as Nylon and aramid fibres. Thus, FRFC having the presented set of properties has applications in various areas of construction, both in the construction of load-bearing and enclosing structures.

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Section: Foam Concrete: a Prefacementioning

confidence: 99%

Section: Applications Of Frfcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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“…However, most of the researches on insulation methods so far have been conducted under the purpose of improving the sandwich panel method that are actively applied for low-rise buildings construction [35][36][37][38][39] and approached the external insulation system in terms of thermal engineering and building materials. Studies conducted for improving the construction aspect of external insulation system are highly limited.…”

Section: Research Background and Purposementioning

confidence: 99%

Simulation Model for Productivity Analysis of External Insulated Precast Concrete Wall System

Baik

Kim

Lee³

et al. 2018

Sustainability

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External Insulation Finishing System (EIFS) is recognized as a suitable method for attaining energy efficiency of buildings. However, conventional EIFS is not actively applied to building construction due to additional time and cost compared with interior insulation method. Therefore, as an alternative that can contribute to active utilization of the external insulation system, this study proposes an External Insulated Precast Concrete (PC) Wall System and its simulation for performing productivity analysis. Results of this study are as follows: (1) an external insulated PC-Wall system is developed of which its insulation performance is above 40% higher than that of the conventional EIFS; (2) performance of the developed system satisfied American Standards for Testing of Materials (ASTM) and American Architectural Manufacturers Association (AAMA) standards; (3) applicability of the developed system is verified via test-bed with construction time lapsing about 40 min for each PC-Wall; and (4) CYCLONE modeling methodology is employed to perform productivity analysis of the developed system compared with conventional EIFS.

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“…The continuous-type connectors can structurally behave better than studtype connectors [11]. In general, also it was noticed that larger deformation was observed due to the increased core thickness [12,13]. Many software like Abaqus software were used to analysis composite sections [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Changing Properties of Wythes in Precast Structural Sandwich Panels

et al. 2020

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This study investigates the effects of changing in the properties of face and core wythes in structural sandwich panels (with dimensions of 500 500 mm and 120 mm total height). Concrete face wythes of three grades (80, 70, 37) MPa, thicknesses of (25, 35, and 45) mm, and three types of core materials (high density foam, polyethylene foam, and palm bark) were used in the production of panels. Steel shear connectors were installed in the panels with angle of 45º. Three-point bending load test was carried out on all panels and results were compared with both of the theoretical extremes capacities of non- composite and fully-composite states and ANSYS software results. The degree of composite action (%) and the (strength/weight) ratio were the main parameters that judged the specimens. It was found that upgrading concrete increased overall strength of slabs especially in high strength concrete (80 MPa), however the use of lightweight concrete (70 MPa) caused high (strength/weight) ratio due to very lightweight. Results revealed that decreasing thickness of concrete face wythes had a positive effect on strength/weight ratio (although the ultimate loads decreased) that enhanced the performance of panels as lightweight structural panels. The optimum face wythe thickness is that of 2.5 cm and has high (strength/weight) ratio. It was noticed that adding polyethylene foam as a core material results in positive effect and high (strength/weight) ratio. Results revealed that high strength concrete (80 MPa) and light-weight concrete (37 MPa) are very successful in the production face wythes of precast light-weight sandwich panels that can obtain high (strength/weight) ratio and high percent of composite action.

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Response of precast foamed concrete sandwich panels to flexural loading

Cited by 75 publications

References 22 publications

Fibre-Reinforced Foamed Concretes: A Review

Fibre-Reinforced Foamed Concretes: A Review

Simulation Model for Productivity Analysis of External Insulated Precast Concrete Wall System

Effect of Changing Properties of Wythes in Precast Structural Sandwich Panels

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