Effect of polystyrene aggregate size on strength and moisture migration characteristics of lightweight concrete

Babu, Daneti Saradhi; Babu, K. Ganesh; Wee, T. H.

doi:10.1016/j.cemconcomp.2006.02.018

Cited by 188 publications

(109 citation statements)

References 16 publications

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“…Compared with the typical sandwich panels, EPS concrete core in the EPS concrete sandwich panels can provide the dual function of transferring load and insulating structure in a single element, and enveloped face sheet acts as a strengthening reinforcement of EPS concrete core. However, the compressive strength of EPS concrete is generally less than 10 MPa (Ravindrarajah and Tuck 1994;Miled et al 2004;Babu et al 2006), which makes it difficult to use as a structural construction material. Additionally, mixture segregation of EPS beads and mortar during the manufacturing process easily leads to a deterioration in quality, and a degradation in durability.…”

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Lee

Kang

et al. 2018

Int J Concr Struct Mater

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Sandwich panels comprising prefabricated ultra-high performance concrete (UHPC) composites can be used as ecofriendly and multi-functional structural elements. To improve the structural and thermal performance of composite sandwich panels, combinations of UHPC and expanded polystyrene (EPS) beads were investigated. High-performance expanded polystyrene concrete (HPEPC) was tested with various EPS bulk ratios to determine the suitability of the mechanical properties for use as a high-strength lightweight aggregate concrete. As a core material in composite sandwich panels, the mechanical properties of HPEPC were compared with those of EPS mortar. The compressive strength of HPEPC is approximately eight times greater than that of EPS mortar, and the thermal conductivity of approximately a quarter that of EPS mortar. The structural behavior of composite sandwich panels was empirically analyzed using different combinations of cores, face sheets, and adhesive materials. In the flatwise and edgewise compression tests, sandwich panels with HPEPC cores had high peak strengths, irrespective of the type of face sheets, as opposed to the specimens with EPS mortar cores. In the four-point bending tests, the sandwich panels with HPEPC cores, or reinforced UHPC face sheets combined with adhesive mortar, exhibited higher peak strengths than the other specimens, and failed in a stable manner, without delamination.

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Section: Introductionmentioning

confidence: 99%

Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Lee

Kang

et al. 2018

Int J Concr Struct Mater

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“…The failure mode in control concrete was brittle and breakable, however, the failure mode of SPS concretes was more gradual and compressible and the specimens were capable of retaining the load after failure without full collapse (Figure 8). This clearly shows the high energy absorption capacity of these concretes that was suggested earlier [4,5,11,31,37]. A recent study [38] reported that there are two main advantages of concrete containing waste plastic: first, the compactness of between 15% and 35%, reducing the thickness under compressive loading and, second, dimensional regaining after load removal.…”

Section: Ultrasonic Pulse Velocitymentioning

confidence: 65%

“…The durability of concrete incorporating EPS particles may be comparable to the durability performance of higher density LWC produced by different types of porous LWA [11]. However, low density LWC with high WA may not be suitable for applications where durability and high resistance to water penetration, chloride performance, and chemicals are required.…”

Section: Effect Of Famentioning

confidence: 82%

“…Most research [3][4][5][6][7][8][9][10][11][12] on concrete containing unmodified expanded polystyrene (EPS) has revealed a decrease in the durability and mechanical properties of concrete with increasing the amount of EPS particles in concrete. These studies have also shown that an increase in strength can be obtained with smaller EPS bead size in concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it can be partially replaced with natural coarse and/or fine aggregates to produce lightweight aggregate concrete (LWAC). LWAC is an important material in reducing the dead-weight of concrete complying with special concrete structures of high-rise buildings [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Combined Effects of Densified Polystyrene and Unprocessed Fly Ash on Concrete Engineering Properties

Herki

2017

Buildings

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Abstract:The present study evaluated the combined effects of two types of waste materials of expanded polystyrene (EPS) and unprocessed fly ash (FA) on different properties of concrete. A novel recycling technique of densifying waste EPS is used to produce a novel lightweight aggregate (LWA). This new technique has solved the problem of segregation in concrete by coating EPS particles with a natural binder of clay and cement. Nine different concrete mixtures with a water to cement ratio of 0.8 were used. The densified EPS and unprocessed FA were partially replaced with natural aggregate and Portland cement, respectively. The engineering properties, including workability, density, compressive strength, ultrasonic pulse velocity (UPV), and water absorption (WA) were investigated at different curing times. According to the experimental results, there is a decrease in compressive strength and UPV with increasing this novel LWA content in concrete. However, by using a suitable mix design, the utilisation of these two waste materials in concrete using an appropriate recycling technique is possible.

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Physical and mechanical properties of heat‐damaged structural concrete containing expanded polystyrene syntherized particles

2014

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Materials recycling for sustainable concrete constructions are favoring the replacement of ordinary aggregate with waste materials, in the form of either solid particles or small void-formers. This is the case of expanded polystyrene syntherized (EPS) concrete containing EPS particles-or beads-whose high-temperature residual behavior is investigated in this project. Two EPS mixes and one reference mix ( fc = 25-30MPa) are tested in compression and tension after a thermal cycle at the reference temperature of 20°C, 150°C, 300°C, 500°C, and 700°C. The thermal diffusivity and the mass loss up to 700°C are investigated as well. The normalized mechanical decay of the two EPS concretes turns out to be slightly higher than that of ordinary concrete, but on the whole, the behaviors are rather close, while the thermal diffusivity of EPS concrete is definitely lower, to the advantage of its insulating capability. Damage indexes are also worked out on the basis of the elastic modulus and of the ultrasonic velocity, in order to have information on the possible void-induced nonlinear effects. The still open problem, however, is whether the game (polystyrene recycling and mass reduction) is worth the candle (more cement and additives)

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Effect of polystyrene aggregate size on strength and moisture migration characteristics of lightweight concrete

Cited by 188 publications

References 16 publications

Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Combined Effects of Densified Polystyrene and Unprocessed Fly Ash on Concrete Engineering Properties

Physical and mechanical properties of heat‐damaged structural concrete containing expanded polystyrene syntherized particles

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