Assessment of geopolymers with Construction and Demolition Waste (CDW) aggregates as a building material

Panizza, Matteo; Natali, Marco; Garbin, Enrico; Tamburini, S.; Secco, Michele

doi:10.1016/j.conbuildmat.2018.06.018

Cited by 81 publications

(47 citation statements)

References 42 publications

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“…Table 6. Selected properties of B50S50 IPs fired at high temperatures 1 . As seen in Table 6, the compressive strength values decrease gradually with the increase in firing temperature.…”

Section: Durability Performance Of Selected Ipsmentioning

confidence: 99%

“…Construction and demolition wastes (CDWs) comprise the largest waste fraction in industrialized countries. They represent one third of the total waste volume generated by industrial activities, which in the EU-28 is about 3 billion tons per year [1]. CDWs derive from construction and demolition activities and mainly contain concrete, masonry, asphalt and metals [2].…”

Section: Introductionmentioning

confidence: 99%

“…It is estimated that approximately 54% of CDW is comprised of ceramic materials (i.e., bricks and tiles), while approximately 12% is concrete [3]. Their disposal requires large areas and often causes severe impacts to the environment [1,4]. On the other hand, the energy requirements for the production of concrete are almost 5% of the global energy consumption.…”

Section: Introductionmentioning

confidence: 99%

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Properties of Inorganic Polymers Produced from Brick Waste and Metallurgical Slag

et al. 2019

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This paper explores the alkali activation potential of brick wastes and metallurgical slags. Inorganic polymers (IPs) were produced using an alkaline medium consisting of sodium hydroxide and sodium silicate solutions and the optimum synthesis conditions were determined. In this context, the variable parameters, such as solid to liquid (S/L) ratio, curing temperature (60, 80 and 90 °C) and ageing time (7 and 28 days) on the compressive strength and the morphology of the produced IPs were investigated. Specimens produced under the optimum synthesis conditions were subjected to high temperature firing and immersed in distilled water and acidic solutions for various periods of time, in order to assess their durability and structural integrity. The results showed that the IPs produced using a mix ratio of 50 wt % metallurgical slag and 50 wt % brick wastes, cured at 90 °C and aged for 7 days obtained the highest compressive strength (48.9 MPa). X-ray fluorescence analysis (XRF), particle size analysis, Fourier transform infrared spectroscopy (FTIR), mineralogical analysis (XRD), mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM) and thermogravimetric (TG) analysis also confirmed the optimum microstructural characteristics and the chemical reactions that took place during synthesis. The overall results of this study indicate that the co-valorization of different waste streams, which are produced in large quantities and cause environmental problems if not properly managed, is a viable alternative for the production of binders or secondary construction materials with higher added value.

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“…Table 6. Selected properties of B50S50 IPs fired at high temperatures 1 . As seen in Table 6, the compressive strength values decrease gradually with the increase in firing temperature.…”

Section: Durability Performance Of Selected Ipsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Properties of Inorganic Polymers Produced from Brick Waste and Metallurgical Slag

et al. 2019

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“…The development of the inorganic HDG mixture, carried out through an extensive experimental research, basically involved two phases. The first, described in detail in Panizza et al [ 22 ], was devoted to identifying the main parameters affecting mechanical, physical and technological properties related to a possible industrial exploitation, whereas the second was focused on the optimisation of the mixture to comply with the requirements set by the pilot plant and by the prototype panels’ features, especially in terms of viscosity and setting time of the fresh paste, curing parameters and adequate strength and limited drying shrinkage of the hardened material. The final HDG formulation delivered the following properties: Brookfield viscosity (spindle n 5 at 1 rpm) in the range 120–150 Pa·s and setting time greater than 70 min at 23 °C, compressive strength of about 37 MPa and splitting tensile strength of about 3 MPa at 28 days of age, apparent density of 1.89 g/cm 3 , open porosity of about 30% and drying shrinkage lower than 0.25% after 6 months.…”

Section: Methodsmentioning

confidence: 99%

Life Cycle Assessment of Prefabricated Geopolymeric Façade Cladding Panels Made from Large Fractions of Recycled Construction and Demolition Waste

et al. 2020

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The construction and demolition sector is one of the biggest consumers of natural resources in the world and consequently, one of the biggest waste producers worldwide. The proper management of construction and demolition waste (CDW) can provide major benefits for the construction and recycling industry. However, the recycling rate of CDW is relatively low, as there is still a lack of confidence in the quality of recycled CDW materials. Therefore, new research projects are looking for innovative solutions within recycling of CDW in order to overcome uncertainties currently associated with the use of construction products made from recycled or re-used CDW. In this paper, a “cradle-to-cradle” life cycle assessment (LCA) study has been conducted to investigate the environmental performance of the prefabricated geopolymeric façade cladding panels made from large fractions of CDW. The LCA results indicate that the majority of the environmental burden arises within the manufacturing stage; however, the environmental burden can be reduced with simple optimisation of the manufacturing process. Furthermore, the environmental impact of the prefabricated geopolymeric façade cladding panels is generally lower than the environmental burden associated with the façade cladding panels made from virgin materials.

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“…The CDW was a blend of fired clay brick and concrete aggregates below 2 mm in size and was incorporated at a level of 50 % by weight. Details of the formulations have been published elsewhere [10]. The HD binder was used to cast an 8 mm thick geopolymer layer on top of expanded polystyrene (EPS) plates to form ETICS panels as follows: HD binder was cast into a casting box of size 50 cm × 50 cm.…”

Section: Methodsmentioning

confidence: 99%

Durability assessment of geopolymer façade panels based on CDW

Ducman¹,

Frankovič²,

Kramar³

et al. 2018

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Within InnoWEE project (Innovative pre-fabricated components including different waste construction materials reducing building energy and minimising environmental impact) construction and demolition waste (CDW) were processed into fine fractions which were further embedded into innovative high performance prefabricated geopolymeric panels. CDW fractions consisted of bricks, concrete, mortars, and wood chips. As a binder slag and metakaolin were used and activated by mixture of K/Na-silicate and KOH/NaOH. Optimized compositions were defined and panels were produced into sizes of 50 cm x 50 cm with the intended use for contact bonded (ETICs like) or ventilated façades. One type of panels was produced by using mainly inorganic CDW and are designated as high density geopolymer panels (HDP), another type was made of at least 40 % of CDW woodchips and designated as wood- based geopolymer panels (WGP). Panels were assessed for their durability according to the provisions of ETAG 004 and other relevant standards for façade systems; among them freeze – thaw resistance, impact resistance, water vapour permeability, capillary water uptake. Results showed that the performance of such panels is suitable for inteded use. “This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 723916”.

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Assessment of geopolymers with Construction and Demolition Waste (CDW) aggregates as a building material

Cited by 81 publications

References 42 publications

Properties of Inorganic Polymers Produced from Brick Waste and Metallurgical Slag

Properties of Inorganic Polymers Produced from Brick Waste and Metallurgical Slag

Life Cycle Assessment of Prefabricated Geopolymeric Façade Cladding Panels Made from Large Fractions of Recycled Construction and Demolition Waste

Durability assessment of geopolymer façade panels based on CDW

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