Mechanical and thermal properties of lightweight concretes with vermiculite and EPS using air-entraining agent

Schackow, Adilson; Effting, Carmeane; Folgueras, Marilena Valadares; Güths, Saulo; Mendes, Gabriela Azambuja

doi:10.1016/j.conbuildmat.2014.02.009

Cited by 169 publications

(64 citation statements)

References 25 publications

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“…A typical thermal conductivity value for concrete with quartzite aggregate is 3.5 W/(m Á K) (Metha and Monteiro 2006). The thermal conductivity of EPS concrete, with an EPS bulk ratio of 55-60%, was 0.50-0.56 W/(m Á K) at a density of approximately 1100 kg/m 3 (Schackow et al 2014). When comparing the typical values of lightweight concrete and EPS concrete, the thermal properties of EPS mortar in this study were found to be lower than anticipated.…”

Section: Thermal Properties Of Component Materialscontrasting

confidence: 49%

“…The strength of EPS concrete increased with increasing concrete density and decreasing EPS volume fractions (Chen and Fang 2011). The thermal resistance of EPS concrete can also increase with an increase of EPS volume fractions, due to the decreased density (Schackow et al 2014;Real et al 2016). To evaluate optimized HPEPC as a core element in a sandwich panel, the mechanical properties of HPEPC, according to the replacement ratio of UHPC and EPS in a unit volume, were investigated.…”

Section: Development Of High Performancementioning

confidence: 99%

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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: Thermal Properties Of Component Materialscontrasting

confidence: 49%

Section: Development Of High Performancementioning

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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“…Furthermore, not only do they offer a fair durability, but also a low manufacturing cost and good thermal insulation (20). Concrete produced from this type of clays and derivatives presents low density values appropriate for lightweight applications (21)(22)(23). The material here considered can be crushed and reused in the preparation of new lightened concrete.…”

Section: Introductionmentioning

confidence: 99%

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Carbajo¹,

Esquerdo-Lloret²,

Ramis³

et al. 2015

Mater. construcc.

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ABSTRACT:The use of sustainable materials is becoming a common practice for noise abatement in building and civil engineering industries. In this context, many applications have been found for porous concrete made from lightweight aggregates. This work investigates the acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates. These natural resources can still be regarded as sustainable since they can be recycled and do not generate environmentally hazardous waste. The experimental basis used consists of different type specimens whose acoustic performance is assessed in an impedance tube. Additionally, a simple theoretical model for granular porous media, based on parameters measurable with basic experimental procedures, is adopted to predict the acoustic properties of the prepared mixes. The theoretical predictions compare well with the absorption measurements. Preliminary results show the good absorption capability of these materials, making them a promising alternative to traditional porous concrete solutions. RESUMEN: Propiedades acústicas del hormigón poroso a base de áridos ligeros de arlita y vermiculita.El uso de materiales sostenibles se está convirtiendo en una práctica común para la reducción de ruido en las industrias de la edificación e ingeniería civil. Este trabajo investiga las propiedades acústicas de hormigón poroso fabricado a partir de áridos ligeros de arlita y vermiculita. Estos recursos naturales todavía pueden considerarse sostenibles ya que pueden ser reciclados y no generan residuos peligrosos para el medio ambiente. La base experimental utilizada se compone de especímenes de diferente tipo cuyas prestaciones acústicas se evalúan en un tubo de impedancia. Adicionalmente, se ha adoptado un modelo teórico simple para medios porosos granulares, basado en parámetros medibles con procedimientos experimentales básicos, con objeto de predecir las propiedades acústicas de las mezclas preparadas. Las predicciones teóricas muestran una buena concordancia con las medidas de absorción. Los resultados preliminares demuestran la buena capacidad absorbente de estos materiales, haciendo de ellos una alternativa prometedora a las soluciones de hormigón poroso tradicionales.

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“…In general, lightweight aggregates occupy more than 50% of the volume of concrete, and the total volume of the lightweight aggregates is a significant factor to determine the properties of lightweight concrete. For example, the density of lightweight concrete, which is a factor that strongly affects both mechanical and thermal properties, varies between 800 and 1500 kg/m 3 depending on the volume of lightweight aggregates [15], and when the specimen contains a large volume of lightweight aggregates, the density and thermal conductivity decrease, while the stiffness and compressive strength also tend to decrease [16]. In addition, the physical properties of lightweight concrete, such as density, and mechanical and thermal properties, are affected significantly by the characteristics of lightweight aggregates [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Gradings of Lightweight Aggregates on the Properties of Concrete

2017

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Lightweight aggregate concrete is a material with very low density and good thermal insulation, and several types of lightweight aggregates have been used for lightweight concrete. Since the characteristics of lightweight aggregates strongly affect the properties of lightweight concrete, a proper consideration for the use of lightweight aggregate is very important for development of lightweight materials. In particular, the sizes and spatial distributions of lightweight aggregates can influence the material responses of lightweight concrete, such as compressive strength and thermal conductivity. In this study, different types of gradings of lightweight aggregates are adopted to investigate the effect of gradings on the material properties. Liaver R , an expanded glass granulate, is used as a lightweight aggregate for the specimens. Virtual models of the lightweight specimens with different gradings are numerically generated, and both mechanical and thermal properties are evaluated using experimental and numerical approaches for more detailed investigation. The obtained results can be utilized to suggest an optimal grading that satisfies both the mechanical and thermal properties of lightweight concrete specimen.

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Mechanical and thermal properties of lightweight concretes with vermiculite and EPS using air-entraining agent

Cited by 169 publications

References 25 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

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Effect of Different Gradings of Lightweight Aggregates on the Properties of Concrete

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