Durability of lightweight masonry mortars made with white recycled polyurethane foam

Junco, C.; Gadea, J.; Rodríguez, Ángel; Gutiérrez-González, S.; Carpintero, Verónica Calderón

doi:10.1016/j.cemconcomp.2012.07.006

Cited by 55 publications

(34 citation statements)

References 18 publications

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“…One of the problems presented by cement-based composite materials is the change that occurs in their porosity due to the interaction of additive materials [16]. These changes in porous structure can affect the density, water absorption and thermal conductivity, as well as the mechanical properties [17] and strength of the compounds [18]. Almost all solid materials have some level of porosity, and it has been shown that the mechanical strength of building materials is directly related to their porosity, pore size distribution [19], and the length of fibres [20].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of the use of mineral wool fibres recovered from CDW for the reinforcement of conglomerates by study of their porosity

Ramírez

Sánchez

Merino

et al. 2018

Construction and Building Materials

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The addition of mineral fibres waste does not affect the functionality of mortars.• The porous structure of admixed fibres mortars is similar to that of the reference.• Waste mineral fibres are an alternative to current commercial reinforcements.• Mortars reinforced with mineral fibres waste minimize environmental impact. a b s t r a c tMineral wool is currently the most used insulation in the European Union, and quantities of this waste have increased alarmingly in the last decade, making it essential to recycle or reuse the material, which is not current practice. This study aims to verify the feasibility of compounds of a cement base with additives of insulating mineral fibre residues recovered from the recycling of construction and demolition waste (CDW). For this purpose, experiments were designed to classify the physical-chemical behaviour of architectural mineral wool waste, and that of mortars incorporating them to determine their porosity due to the effects of these fibres on the properties of the compounds. The results obtained show that both the structure and chemical composition as well as the microstructure of the reinforced mortars are viable, and that they would therefore be a sustainable alternative to the current mortars of composite materials.

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Section: Introductionmentioning

confidence: 99%

Feasibility of the use of mineral wool fibres recovered from CDW for the reinforcement of conglomerates by study of their porosity

Ramírez

Sánchez

Merino

et al. 2018

Construction and Building Materials

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“…Recycled materials such as ladle furnace slag (LFS) are being increasingly used in cement production, as their use reduces the consumption of natural resources and limits the overall environmental impact of the construction industry. These materials would otherwise be transported to landfill sites for disposal, where they would cause further environmental contamination .…”

Section: Introductionmentioning

confidence: 99%

Analysis of long‐term corrosion behavior in mortars containing recycled ladle furnace slag using computerized tomography and SEM

Rodríguez

Gutiérrez-González

Barrio

et al. 2014

Materials & Corrosion

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A series of mortars subjected to accelerated corrosion in a humid environment form the basis for this study. In particular, we studied the corrosion behavior of steel reinforcement bars that were embedded in cement mortars that contained white ladle furnace slag (LFS) in partial substitution for fines and cement. The effects were observed using computerized axial tomography and scanning electron microscopy. Zones with fissures resulting from corrosion and the degree of damage due to passivation were identified from the imaging analysis.Mortars with and without white LFS behaved in a similar manner in the presence of chlorides. X-ray diffraction (XRD) analysis confirmed that the formation of different hematite and goethite-type iron oxides was mainly responsible for the corrosion that was observed.

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“…If a relationship between mechanical resistance and the imprints made in each of the tested mortars is established, it can be confirmed that the BM, with the greater imprint is that which more greatly withstands compression (35.1 MPa), whereas the rest of the mortars, with lesser imprinting, are resistant to compression between (15)(16)(17)(18)(19)(20). In all cases, materials lightened with expanded clay which incorporated recycled concrete and mixed aggregates improve resistance to abrasion, with very uniform resistance to compression.…”

Section: Physical Results: Mechanical Strength Porosity and Surfacmentioning

confidence: 97%

“…This behavior is explained by the hydration reactions that happen in the mortars' mineralogical components, which, can occur up to 6 months after being manufactured in normal mortars, this would justify a gradual increase during this period. The decrease occurring in the last cycles may be due to the washing and dissolution of the mortar's soluble components . Variations in weight are not particularly relevant.…”

Section: Durability Resultsmentioning

confidence: 99%

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Durability of lightweight concrete made concurrently with waste aggregates and expanded clay

Muñoz‐Ruiperez

Rodríguez

Junco

et al. 2018

Structural Concrete

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The use of waste aggregates simultaneously with expanded clay to obtain lightweight masonry mortars in construction constitutes a good way for a more sustainable society. This research presents a study about the physical properties of the mortars fabricated with construction and demolition wastes and expanded clay as lightweight material by way of flexural and compressive strength, porosity and surface abrasion resistance. Computerized tomography and microporosity show a good distribution of materials and pores. The paper also contains an analysis of the influence in the durability after incorporating different proportions of recycled aggregates. The results indicate that the properties do not suffer significant changes in external appearance after accelerated aging tests as thermal shock, saline solution, freeze and thaw, resistance to SO2 and carbonation. No flaking, cracking, splitting or cracks in the specimen's outer surfaces being observed. Therefore, it can be confirmed that the masonry mortars tested performed well in all cases when exposed to external climatic atmospheres according to the international standards.

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Durability of lightweight masonry mortars made with white recycled polyurethane foam

Cited by 55 publications

References 18 publications

Feasibility of the use of mineral wool fibres recovered from CDW for the reinforcement of conglomerates by study of their porosity

Feasibility of the use of mineral wool fibres recovered from CDW for the reinforcement of conglomerates by study of their porosity

Analysis of long‐term corrosion behavior in mortars containing recycled ladle furnace slag using computerized tomography and SEM

Durability of lightweight concrete made concurrently with waste aggregates and expanded clay

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