Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Utilization of recycled concrete aggregates in LDPE-bonded cementless paver blocks
https://orcid.org/0009-0002-4505-2210
https://orcid.org/0000-0003-3935-4108
Abstract This study investigates the utilization of recycled concrete aggregates (RCA) in waste low-density polyethylene (LDPE)-bonded, non-traffic cementless paver blocks. RCA is incorporated at varying percentages (0%, 25%, 50%, 75%, and 100%) to replace virgin coarse aggregates. Differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and melt flow index (MFI) were performed to characterize the thermal and physical properties of LDPE. RCA was treated using a 2-phase treatment technique to incorporate its efficient utilization. Four types of LDPE-to-aggregate mixes, namely, A (1:2.5), B (1:3), C (1:3.5), and D (1:4), were prepared to determine the optimal ratio and the quality control parameters through trial mixes. Paver blocks were evaluated based on their compressive strength, density, water absorption, and thermal strength stability. The results indicate that performing a double-treatment on RCA, optimized mix ratios, and identifying quality control parameters enhances the overall performance of paver blocks. A 35 MPa strength is achieved with 75% replacement, 1:3.5 LDPE-to-aggregate ratio, 30:70 coarse to fine aggregate ratio, and 50 mm depth, with a melt mixing temperature of 180–210°C. Microstructure analysis reveals a strong inter-transition zone (ITZ) for 75% replacement. The ANOVA, followed by a post-hoc analysis, was performed to validate the significance of these results.
Graphical Abstract Display Omitted
Highlights Alternate solutions for traditional pavements in pedestrian or low traffic areas. 35 MPa compressive strength for 75% replacement of CA with RCA for 1:3.5 LDPE to aggregate ratio. Statistical analysis, including ANOVA and post hoc tests validates the significance of replacement. Material characterization reveals strong ITZ and binder properties of LDPE.
Utilization of recycled concrete aggregates in LDPE-bonded cementless paver blocks
https://orcid.org/0009-0002-4505-2210
https://orcid.org/0000-0003-3935-4108
Abstract This study investigates the utilization of recycled concrete aggregates (RCA) in waste low-density polyethylene (LDPE)-bonded, non-traffic cementless paver blocks. RCA is incorporated at varying percentages (0%, 25%, 50%, 75%, and 100%) to replace virgin coarse aggregates. Differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and melt flow index (MFI) were performed to characterize the thermal and physical properties of LDPE. RCA was treated using a 2-phase treatment technique to incorporate its efficient utilization. Four types of LDPE-to-aggregate mixes, namely, A (1:2.5), B (1:3), C (1:3.5), and D (1:4), were prepared to determine the optimal ratio and the quality control parameters through trial mixes. Paver blocks were evaluated based on their compressive strength, density, water absorption, and thermal strength stability. The results indicate that performing a double-treatment on RCA, optimized mix ratios, and identifying quality control parameters enhances the overall performance of paver blocks. A 35 MPa strength is achieved with 75% replacement, 1:3.5 LDPE-to-aggregate ratio, 30:70 coarse to fine aggregate ratio, and 50 mm depth, with a melt mixing temperature of 180–210°C. Microstructure analysis reveals a strong inter-transition zone (ITZ) for 75% replacement. The ANOVA, followed by a post-hoc analysis, was performed to validate the significance of these results.
Graphical Abstract Display Omitted
Highlights Alternate solutions for traditional pavements in pedestrian or low traffic areas. 35 MPa compressive strength for 75% replacement of CA with RCA for 1:3.5 LDPE to aggregate ratio. Statistical analysis, including ANOVA and post hoc tests validates the significance of replacement. Material characterization reveals strong ITZ and binder properties of LDPE.
Utilization of recycled concrete aggregates in LDPE-bonded cementless paver blocks
https://orcid.org/0009-0002-4505-2210
https://orcid.org/0000-0003-3935-4108
Abstract This study investigates the utilization of recycled concrete aggregates (RCA) in waste low-density polyethylene (LDPE)-bonded, non-traffic cementless paver blocks. RCA is incorporated at varying percentages (0%, 25%, 50%, 75%, and 100%) to replace virgin coarse aggregates. Differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and melt flow index (MFI) were performed to characterize the thermal and physical properties of LDPE. RCA was treated using a 2-phase treatment technique to incorporate its efficient utilization. Four types of LDPE-to-aggregate mixes, namely, A (1:2.5), B (1:3), C (1:3.5), and D (1:4), were prepared to determine the optimal ratio and the quality control parameters through trial mixes. Paver blocks were evaluated based on their compressive strength, density, water absorption, and thermal strength stability. The results indicate that performing a double-treatment on RCA, optimized mix ratios, and identifying quality control parameters enhances the overall performance of paver blocks. A 35 MPa strength is achieved with 75% replacement, 1:3.5 LDPE-to-aggregate ratio, 30:70 coarse to fine aggregate ratio, and 50 mm depth, with a melt mixing temperature of 180–210°C. Microstructure analysis reveals a strong inter-transition zone (ITZ) for 75% replacement. The ANOVA, followed by a post-hoc analysis, was performed to validate the significance of these results.
Graphical Abstract Display Omitted
Highlights Alternate solutions for traditional pavements in pedestrian or low traffic areas. 35 MPa compressive strength for 75% replacement of CA with RCA for 1:3.5 LDPE to aggregate ratio. Statistical analysis, including ANOVA and post hoc tests validates the significance of replacement. Material characterization reveals strong ITZ and binder properties of LDPE.
Utilization of recycled concrete aggregates in LDPE-bonded cementless paver blocks
Saraswat, Pranav (Autor:in) / Singh, Bhupendra (Autor:in)
13.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
RCA , ITZ , LDPE , Plastic , Paver block
Proportioning Concrete Mixtures with Crushed Concrete Paver Blocks as Recycled Aggregates
| British Library Conference Proceedings | 2008