Experimental Investigation on Mechanical and Thermal Properties of Concrete Using Waste Materials as an Aggregate Substitution

Sosoi, Gavril; Abid, C.; Bărbuţă, Marinela; Burlacu, Andrei; Bălan, Marius Costel; Brănoaea, Marius; Vizitiu, Robert Ștefan; Rigollet, Fabrice

doi:10.3390/ma15051728

Cited by 19 publications

(9 citation statements)

References 36 publications

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“…This module is insulated using a polystyrene layer of 0.1 m at the exterior to prevent heat loss. The concrete blocks were built according to previous research [ 30 ], which analyzed the density, compressive strength, and thermal conductivity of several concrete samples mixed with various percentages of fly ash, chopped PET, sawdust, and granular polystyrene.…”

Section: Methodsmentioning

confidence: 99%

Innovative Passive and Environmentally Friendly System for Improving the Energy Performance of Buildings

et al. 2022

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The aim of the study is to develop a system for converting, accumulating, and delivering solar energy that is based on the development of an innovative solar panel with heat pipes and a heat storage wall, for the construction of passive structures. The novel aspect of this experiment is the utilization of concrete walls that have different recyclable materials added to their structure in various proportions. The solar energy from the sunny façades is transformed by this system into thermal energy, which is then transferred by integrated heat pipes in a massive element with high thermal inertia. Using insulated shutters, thermal energy can be stored during the day and released at night to keep the room at a comfortable temperature. In order to integrate the modules into the solar recovery system, four concrete samples were cast with a blend of standard and waste aggregates. Four heat fluxes of 100 W/m2, 150 W/m2, 200 W/m2, and 250 W/m2 were applied to each global system. Thermal imaging data and numerical simulations both supported the findings of temperature sensors. The most effective mixture, fly ash and chopped PET, delivered temperatures that were, on average, 3.3% higher at the end of the charging cycle than those measured for the control sample. The discharging cycle of the concrete block with fly ash and sawdust was the most effective, with an average temperature loss of 5.0 °C as compared to 5.5 °C for the control sample, on average.

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Section: Methodsmentioning

confidence: 99%

Innovative Passive and Environmentally Friendly System for Improving the Energy Performance of Buildings

et al. 2022

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“…It is possible to add additives and admixtures to sawdust concrete. As a result of the combination of wood and concrete, a material with a lower density and greater thermal and acoustic insulation than regular concrete is obtained [13], [15]. Fig.…”

Section: Sawdust Concretementioning

confidence: 99%

Application of sawdust concrete in construction

Kropidłowska

2022

Bud-Arch

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Sawdust concrete is a type of lightweight concrete in which some of the mineral aggregate is replaced by sawdust - a by-product of wood processing. It is not a new material, but its potential is not utilised to its full degree. Taking into account the most important advantages of sawdust concrete - lower density and greater thermal and acoustic insulation than ordinary concrete - it is worth to consider the possibilities of its usage in construction wider than currently . In order to present the properties of sawdust concrete, the review of contemporary technical literature has been performed. For the production of sawdust concretes mineralized sawdust from various types of trees, ordinary cements, mineral aggregates and water, are used. The usage of additives and admixtures is also allowed. The properties of the finished sawdust concrete are mainly influenced by the proportion of its components, especially the amount of fine aggregates replaced by sawdust. The construction products made of sawdust concrete are characterized by a low coefficient of thermal conductivity λ and soundproofing properties. In bending tests, a simply supported sawdust concrete beam behaves similar to a regular concrete beam, cracks first appear in the tension zone. Tensile strength, compressive strength and Young's modulus of sawdust concrete products depend on the proportion of components and the method of sawdust preparation before applying in the sawdust concrete-mix. Compared to ordinary concrete, the obtained values for sawdust concrete are lower, but partially fall within the ranges for the lower classes of ordinary concrete. There are several possible applications of sawdust concrete in construction. One of the perspectives is to use it to build walls in buildings that require soundproofing between rooms, or to replace wood with it when renovating old buildings. However, further tests of sawdust concrete are needed in terms of the most favourable composition for its mechanical properties, and to define the standards according to which sawdust concrete elements should be produced.

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“…Wang introduces high-impact recycled polystyrene (HIPS) as a substitute for sand in the cement mortar, achieving a reduction in thermal conductivity of up to 87% compared to that of the reference mortar, measured using transient plane source equipment [11]. Sosoi manufactures concrete in which he replaces part of the sand with PET waste and polystyrene granules, achieving a lighter concrete with a thermal conductivity value 25% lower than the reference sample, obtained using transient plane source equipment [12]. Senhadji studied the possibilities of adding polyvinyl chloride (PVC) waste as an alternative fine aggregate in ecological mortars, achieving reductions of up to 41% in thermal conductivity with respect to a traditional mortar, whose measurements were obtained through a Quick Thermal Conductivity Meter (QTM 30) device using the steady state method for 90 days [13].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Thermal Properties of Gypsum Plaster with Plastic Waste Aggregates

Vidales-Barriguete,

Barreira,

Gomes Dias

2024

Materials

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Building material manufacturers must support new production models that encourage the manufacture of more efficient and sustainable products. This includes thinking about savings in the use of raw materials, a contribution to the energy efficiency of buildings during their useful life, and a reduction in the generation and deposit of waste in landfills. In this research, an analysis of the thermal properties of gypsum composites added with plastic waste is carried out using the most common methods, the steady state method and the transient plane source method, and the effect of water saturation on these composites is tested. The results show an improvement in the thermal performance of the composites (values reduced with respect to the reference by 4–7%), despite their heterogeneity, as well as a variation in the measurements carried out, depending on the method used for the measurements (variation up to 10%). It is also found that the degree of humidity negatively affects the thermal conductivity coefficient but, on the contrary, this coefficient is not altered in the composites with plastic waste, due to their lower hygroscopicity. Therefore, it is considered that the proposed eco-plasters are a good alternative to traditional plasters, with which to contribute to the achievement of the objectives of the current European directives on waste and circular economy.

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Experimental Investigation on Mechanical and Thermal Properties of Concrete Using Waste Materials as an Aggregate Substitution

Cited by 19 publications

References 36 publications

Innovative Passive and Environmentally Friendly System for Improving the Energy Performance of Buildings

Innovative Passive and Environmentally Friendly System for Improving the Energy Performance of Buildings

Application of sawdust concrete in construction

Assessment of the Thermal Properties of Gypsum Plaster with Plastic Waste Aggregates

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