Energy efficiency in building installations using thermal insulating materials in northeast Brazil

Melo, Miguel Otávio; Silva, Luiz Bueno da; Coutinho, Antonio S.; Sousa, Vivian de Oliveira; Perazzo, N.

doi:10.1016/j.enbuild.2011.11.021

Cited by 21 publications

(9 citation statements)

References 15 publications

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“…All of this has the purpose of obtaining lightweight, insulation materials that outperform conventional materials, reducing haulage costs, improving energetic efficiency, and exploiting recycled waste products (that would otherwise be dumped). A lighter weight that allows quicker assembly and improved thermal characteristics that require no further insulative layers, represent two implicit advantages of these materials in prefabricated products (9,10). Numerous references in the literature refer to the incorporation of different waste products in prefabricated plasterboard, in order to improve certain physical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Characterization of gypsum plasterboard with polyurethane foam waste reinforced with polypropylene fibers

et al. 2016

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Gypsum plasterboard that incorporates various combinations of polyurethane foam waste and polypropylene fibers in its matrix is studied. The prefabricated material was characterized in a series of standardized tests: bulk density, maximum breaking load under flexion stress, total water absorption, surface hardness, thermal properties, and reaction to fire performance. Polypropylene fibers were added to the polyurethane gypsum composites to improve the mechanical behavior of the plasterboard under loading. The results indicate that increased quantities of polymer waste led to significant reductions in the weight/surface ratio, the mechanical strength and the surface hardness of the gypsum, as well as improving its thermal resistance. The polypropylene fibers showed good adhesion to the polymer and the gypsum matrix, which enhanced the mechanical performance and the absorption capacity of these compounds. The non-combustibility test demonstrated the potential of the new material for use in internal linings. RESUMEN: Caracterización de placas de yeso con residuos de espuma de poliuretano reforzadas con fibras de polipropileno.Este artículo presenta un estudio experimental basado en la reutilización de residuos de poliuretano en una matriz de yeso para elaborar una placa de yeso laminado. Las placas fueron caracterizadas mediante los ensayos normalizados de densidad aparente, carga de rotura máxima a flexión, absorción total de agua, dureza superficial y reacción al fuego. Se han introducido fibras de polipropileno en la matriz con el objetivo de aumentar la resistencia mecánica del material. Los resultados muestran que el incremento de residuo polimérico en el material implica importantes reducciones de peso, resistencia mecánica y dureza superficial, a la par que se mejora su resistencia térmica consiguiéndose valores similares a los comerciales. Las fibras de polipropileno mostraron una buena adhesión con el polímero, mejorando el comportamiento mecánico y la capacidad de absorción. El ensayo de reacción al fuego confirmó que los residuos de poliuretano pueden ser empleados en la fabricación de placas de yeso laminado en cumplimiento con la normativa.

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Section: Introductionmentioning

confidence: 99%

Characterization of gypsum plasterboard with polyurethane foam waste reinforced with polypropylene fibers

et al. 2016

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“…They are marketed in bags of 50 to 100 liters or bulk. 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).…”

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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“…When vermiculite is heated to 650ºC-1000°C, it expands to 8-30 times its original volume (Hwang and Hung 2005). Therefore, the expanded form of vermiculite shows very low density, high refractoriness, high sound insulation and low thermal conductivity (Melo et al 2012;Schackow et al 2014). In addition, there is no data on the formation of carbon dioxide emissions during the expansion process of vermiculite (Epa U.…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of C class fly ash based lightweight geopolymer mortar produced with expanded vermiculite aggregate

Kaya

Köksal

2022

rdlc

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This study presents the physical and the mechanical properties of C class fly ash (FA) based lightweight geopolymer mortars produced with expanded vermiculite (EV) aggregate. The FA was activated with NaOH containing 12%, 14% and 16% sodium by weight. The volumetric ratios of EV/FA in the samples were chosen as 2,4 and 6 in the study. The liquid/solid ratio 0.23, 0.26 and 0.29. Lightweight geopolymer mortar (LGM) samples were produced by mixing FA, EV, NaOH and water in a mixer. The samples placed in molds were exposed to activation temperature of 100°C for 24 hours in the oven. The samples taken out of the oven were demoulded and kept in air curing for 28 days at 20°C±2°C room temperature. After curing, unit weight, apparent porosity, water absorption ratio, ultrasonic pulse velocity (UPV), flexural strength and compressive strength tests were performed on the samples. In addition, the thermal conductivity coefficients of the samples were determined. As a result of the experiment, a compressive strength varying between 0.59 MPa and 3.81 MPa was obtained in lightweight geopolymers samples with a unit weight between 906 kg/m3 and 1477 kg/m3. Expanded vermiculite showed a good performance on thermal conductivity of LGMs and a decrease in thermal conductivity up to the 0.094 W/mK was observed.

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Energy efficiency in building installations using thermal insulating materials in northeast Brazil

Cited by 21 publications

References 15 publications

Characterization of gypsum plasterboard with polyurethane foam waste reinforced with polypropylene fibers

Characterization of gypsum plasterboard with polyurethane foam waste reinforced with polypropylene fibers

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

Physical and mechanical properties of C class fly ash based lightweight geopolymer mortar produced with expanded vermiculite aggregate

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