Novel cement-based sandwich composites engineered with ground waste tire rubber: design, production, and preliminary results

Valente, Marco; Sambucci, Matteo; Sibai, Abbas; Iannone, Annalaura

doi:10.1016/j.mtsust.2022.100247

Cited by 11 publications

(4 citation statements)

References 52 publications

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“…The proposed material is a compound made with scrap tires in the form of ground Tire rubber (GTR). Some other researchers as Valente et al [22], have proposed the use of GTR in cement-based sandwich composites, in our case the cement is not included in the mix, using only GTR, fibers obtained from the recycling of the tires and PUR as an agglomerate agent.…”

Section: Introductionmentioning

confidence: 99%

New approach in the reuse of modified ground tire rubber as thermal and acoustic insulation to be used in civil engineering

Colom,

Girbau,

Marin

et al. 2023

J Mater Cycles Waste Manag

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The concern for the amount of end-of-life tires generated each year has arisen from constant research directed to their valorisation. Herein we propose a new material, which is constituted by GTR with a binder, as acoustic and also as a thermal insulator for civil engineering. The insulator can also include the fibre mat present in the tire, seldomly considered as a recyclable sub-product. To provide insight into the insulating behaviour of these materials, four mathematical models have been tested and compared with the experimental results of thermal conductivity. The Lewis-Nielsen modelization presented good accuracy with deviations of less than 3%. A statistical analysis has also been conducted on the experimental data showing that the parameter with more effect on thermal conductivity is thickness (differences up to 43%) being particle size, less important (ca 6%). In acoustic properties, different effects can be observed depending on the frequency range, being the density the most relevant. From the mathematical, statistical and experimental analysis can be deduced that good insulation properties would be achieved in materials with: low density, porous; including mat and thick. The effect of these parameters causes variations of thermal conductivity from 0.189 to 0.117 W/m·K and in sound absorption coefficient from 0.06 to 0.6.

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Section: Introductionmentioning

confidence: 99%

New approach in the reuse of modified ground tire rubber as thermal and acoustic insulation to be used in civil engineering

Colom,

Girbau,

Marin

et al. 2023

J Mater Cycles Waste Manag

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“…For mold-casted mixtures, the values of Rc, Φ, and SRI were collected by Refs. [24,25]. The k-values, instead, were specially determined for this manuscript.…”

Section: Performance Characterization Of Materialsmentioning

confidence: 99%

“…SRI was determined by impedance tube measurements, following the experimental procedure described in Refs. [19,25].…”

mentioning

confidence: 99%

Life Cycle Assessment (LCA) of 3D Concrete Printing and Casting Processes for Cementitious Materials Incorporating Ground Waste Tire Rubber

2023

Self Cite

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Ordinary concrete is an indispensable construction material of modern society which is used for everything from mundane road pavements to building structures. However, it is often used for non-load-bearing applications (for instance, insulating lightweight building units) where mechanical strength is not a priority. This leads to an avoidable depletion of natural aggregates which could instead be replaced by alternative waste materials capable of conferring to the material the desired performance while ensuring a “green” route for their disposal. Furthermore, the automation of production processes via 3D printing can further assist in the achievement of a more advanced and sustainable scenario in the construction sector. In this work, performance and environmental analyses were conducted on a 3D-printable cementitious mix engineered with ground waste tire rubber aggregates. The research proposed a comparative study between rubberized concrete mixes obtained by 3D printing and traditional mold-casting methods to achieve a comprehensive analysis in terms of the mix design and manufacturing process. To evaluate the environmental performance (global warming potential and cumulative energy demand) of the investigated samples, Life Cycle Assessment models were built by using the SimaPro software and the Ecoinvent database. The Empathetic Added Sustainability Index, which includes mechanical strength, durability, thermo-acoustic insulation, and environmental indicators, was defined to quantify the overall performance of the samples in relation to their engineering properties and eco-footprint.

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“…This exacerbates the diffusion and penetration of chloride ions into the concrete [ 26 ], thereby significantly impacting its resistance to chemical corrosion and frost resistance [ 27 ]. In addition, the latest applications in civil engineering including the bond strength between concrete overlays [ 28 ] and the design of sandwich/hybrid cementitious structures [ 29 ] are also necessary to consider the effect of the dry environment. Therefore, when studying concrete materials adapted to the salt lake environment in China, it is essential to consider preventing concrete shrinkage cracking and reducing the adverse effects of the dry climate on concrete durability.…”

Section: Introductionmentioning

confidence: 99%

Influence of Drying Conditions on the Durability of Concrete Subjected to the Combined Action of Chemical Attack and Freeze–Thaw Cycles

Song,

Yu,

2024

Materials

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The durability of concrete is critical for the service life of concrete structures, and it is influenced by various factors. This paper investigates the impact of the relative humidity (RH) of the curing environment on the durability of five different concrete types. The aim is to determine a suitable approach for designing concrete that is well-suited for use in the salt lake region of Inner Mongolia. The concrete types comprise ordinary Portland cement (OPC), high-strength expansive concrete (HSEC), high-strength expansive concrete incorporating silica fume, fly ash, and blast furnace slag (HSEC-SFB), steel fiber-reinforced high-strength expansive concrete (SFRHSEC), and high elastic modulus polyethylene fiber-reinforced high-strength expansive concrete (HFRHSEC). All these concrete types underwent a 180-day curing process at three distinct relative humidities (RH = 30%, 50%, and 95%) before being subjected to freeze–thaw cycles in the Inner Mongolia salt lake brine. The curing environment with a 95% RH is referred to as the standard condition. The experimental results reveal that the durability of OPC and HSEC decreases significantly with increasing relative humidity. In comparison with the control sample cured in 95% RH, the maximum freeze–thaw cycles for concrete cured in lower RHs are only 31% to 76% for OPC and 66% to 77% for HSEC. However, the sensitivity of the durability of HSEC-SFB, SFRHSEC, and HFRHSEC to variations in RH in the curing environment diminishes. In comparison with the corresponding reference value, the maximum freeze–thaw cycles for samples cured in dry conditions increase by 14% to 17% for HSEC-SFB and 21% for SFRHSEC. Specifically, the service life of HFRHSEC cured in a low RH is 25% to 46% higher than the reference value. The durability of HSEC-SFB, SFRHSEC, and HFRHSEC has been proven to be appropriate for structures located in the salt lake region of Inner Mongolia.

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Novel cement-based sandwich composites engineered with ground waste tire rubber: design, production, and preliminary results

Cited by 11 publications

References 52 publications

New approach in the reuse of modified ground tire rubber as thermal and acoustic insulation to be used in civil engineering

New approach in the reuse of modified ground tire rubber as thermal and acoustic insulation to be used in civil engineering

Life Cycle Assessment (LCA) of 3D Concrete Printing and Casting Processes for Cementitious Materials Incorporating Ground Waste Tire Rubber

Influence of Drying Conditions on the Durability of Concrete Subjected to the Combined Action of Chemical Attack and Freeze–Thaw Cycles

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