The mechanical, transport and thermal properties of mortar and concrete containing waste cork

Panesar, Daman K.; Shindman, B.

doi:10.1016/j.cemconcomp.2012.06.003

Cited by 125 publications

(68 citation statements)

References 8 publications

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“…The breaking load decreased with the increase in the quantity of polyurethane waste. This reduction in resistance might be related to the lower content of gypsum in the samples, which represents the structural skeleton of the composite material (25). The breaking load appeared to increase with the addition of polypropylene fibers.…”

Section: Flexural Strength (Measured As Breaking Load Flexion)mentioning

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: Flexural Strength (Measured As Breaking Load Flexion)mentioning

confidence: 99%

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

et al. 2016

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“…The mortar and concrete mix variables examined included the percentage of cork as sand replacement (0%, 10% and 20%, by weight). Panesar et al [20] concluded that the thermal conductivity of concrete-cork composites decreases, as the concrete density decreases. A 46% greater thermal resistance was measured for concrete-cork composites containing 20% of cork in comparison to the reference concrete without cork.…”

Section: Literature Review -Cork and Eps Propertiesmentioning

confidence: 99%

“…Taking advance of the low density and high gas content of cork's cellular structure in the low thermal conductivity, Panesar et al [20] studied the impact of cork used as sand replacement or stone replacement on the plastic, mechanical, transport, microstructural and thermal properties of mortar and concrete. Mix design variables include the percentage of cork, cork size and the cork blend.…”

Section: Literature Review -Cork and Eps Propertiesmentioning

confidence: 99%

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Cement-cork mortars for thermal bridges correction. Comparison with cement-EPS mortars performance

Brás

Leal

Faria

2013

Construction and Building Materials

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The aim of this paper is to demonstrate the advantage of cork-mortars for renderings when compared to EPSmortars, from a thermal characteristics point of view, namely in steady and unsteady conditions. It was intended to develop specific rendering mortars able to be applied in thermal bridges to reduce condensation effects and heat transfer in buildings envelopes. The impact of this solution is significant, especially in building typologies as framed reinforced concrete structures. Cement mortars and cement-EPS mortars are used as a reference as their properties are easily recognized compared to cement-cork mortars, which are made with by-products from the cork industry. Several studies were made concerning fresh and hardened state behaviour of mortars, namely: rheological and mechanical properties, microstructure evolution with time and thermal behaviour. For a cement based mortar, different cork dosages (from 0% to 80%) were tested (as sand replacement by mass). Microstructural analyses show that the mechanical properties of cement-cork blends are not only controlled by cork's low density, but also by interaction of cork extractives with the cement hydration process. Thermal conductivity presents a linear decrease for an increasing cork dosage in mortars. Concerning the effect on thermal delay, cork-mortars seem to behave better than EPS-mortars.

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“…Finer cork sizes were most beneficial to achieve optimum mechanical and transport properties. However, high permeability values indicated that concrete-cork composites considered in this study may be vulnerable to poor durability performance 8 .…”

Section: Introductionmentioning

confidence: 99%

Strength and Durability of Mortar Using Cork Waste Ash as Cement Replacement

2014

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Cork powder, the major waste from cork processing industries, is generated from grinding, cutting and finishing operations throughout the industrial cork process. Cork powder has been used mainly as fuel in cork industries. Cork waste ash is usually landfilled but if efficiently used in cement based construction materials it could contribute to sustainability. Strength and durability testing was undergone on mortar with 10 and 20% cement replacement with cork waste ash. Although strength is acceptable for 10% cement replacement with cork ash (5% loss at 90 days, compared to control), most durability properties (tested up to 6 months according to test type) reduced performance probably due to a broader pore structure caused by coarse particles in the ash which tested non pozzolanic. Moreover, cork waste ash does not present the necessary requirements in terms of chemical properties considering several standards. Present work has revealed that this cork waste cannot be used as a pozzolan or as a filler in cement based materials. In fact it is known that chemical composition of biomass ash is highly variable due to moisture variations, ash yield and different genetic types of inorganic matter in biomass and therefore it is important to pinpoint which types of biomass waste are adequate or not to use as cement replacement in construction.

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The mechanical, transport and thermal properties of mortar and concrete containing waste cork

Cited by 125 publications

References 8 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

Cement-cork mortars for thermal bridges correction. Comparison with cement-EPS mortars performance

Strength and Durability of Mortar Using Cork Waste Ash as Cement Replacement

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