Analysis of epoxy composite with diapers waste as fillers: relationship of density, porosity and sound absorption coefficient

In this study, epoxy composites consisting of diapers waste (DW) as filler to improve the strength of the materials were produced by hand lay-up fabrication process. The inclusion of the DW significantly improves the sound absorption properties of epoxy composites. This study analyzes the relationship between the density, porosity and sound absorption coefficient properties of different weight ratio of the DW in the epoxy composites. Density and porosity is the key factor for acoustic efficiency determination in the same composite form. It can be mainly attributed to great number of voids which more porous and less dense into the matrix, increasing the sound absorption efficiency of the epoxy composites materials. The properties of the diapers waste are lightweight which show that, the incorporation of the diapers waste as fillers in the epoxy composite shows lower value of the density while increase in terms of porosity. Ratio 0.5 DW/epoxy had the most excellent properties in terms of lower density, higher porosity and sound absorption coefficient with 0.93 SAC score

Influence of Recycled Glass Ceramic Waste on Physical and Mechanical Properties of Foamed Concrete (FC)

Glass ceramic waste (GCW) has been left unrecycled due to the challenges it causes. The primary purpose of this research is to find the optimal GCW composition as a quartz sand additive for Foamed Concrete-based Glass Ceramic Waste (FC-GCW) which will reduce the amount of unrecycled GCW that ends up in landfills while producing a sustainable product. The samples were prepared by grinding the GCW and mixing varying percentages of GCW (0, 5, 10, 15, 20, 25, and 30%) with a consistent quantity of cement, quartz sand, water, and foam. Physical and mechanical tests were performed on the samples. During physical tests, the density increased as the GCW percentage increased, but water absorption and porosity decreased. 20% FC-GCW had appropriate density, water absorption, and porosity values of 0.887 g/cm3, 22.6 %, and 88.9%, respectively, which demonstrated that the material is lightweight and porous. For mechanical testing, it was discovered that FC-GCW with 20% GCW addition had the highest average compressive strength of 0.94 MPa and 2.01 MPa for 7 and 28 days, respectively. This research's contribution can be applied to areas where low densities are preferred and low compressive strength is required, such as replacing existing soil to balance foundations, profiling positive slope to drains of flat concrete roofs, lightweight raft foundation in housing construction, trench reinstatement, soil stabilization by backfill of embankments, floor levelling, blinding concrete for thermal insulation purposes, pipefilling, lightweight foundations, and trench reinstatement

Influence of Recycled Glass Ceramic Waste on Physical and Mechanical Properties of Foamed Concrete (FC)

Glass ceramic waste (GCW) has been left unrecycled due to the challenges it causes. The primary purpose of this research is to find the optimal GCW composition as a quartz sand additive for Foamed Concrete-based Glass Ceramic Waste (FC-GCW) which will reduce the amount of unrecycled GCW that ends up in landfills while producing a sustainable product. The samples were prepared by grinding the GCW and mixing varying percentages of GCW (0, 5, 10, 15, 20, 25, and 30%) with a consistent quantity of cement, quartz sand, water, and foam. Physical and mechanical tests were performed on the samples. During physical tests, the density increased as the GCW percentage increased, but water absorption and porosity decreased. 20% FC-GCW had appropriate density, water absorption, and porosity values of 0.887 g/cm3, 22.6 %, and 88.9%, respectively, which demonstrated that the material is lightweight and porous. For mechanical testing, it was discovered that FC-GCW with 20% GCW addition had the highest average compressive strength of 0.94 MPa and 2.01 MPa for 7 and 28 days, respectively. This research's contribution can be applied to areas where low densities are preferred and low compressive strength is required, such as replacing existing soil to balance foundations, profiling positive slope to drains of flat concrete roofs, lightweight raft foundation in housing construction, trench reinstatement, soil stabilization by backfill of embankments, floor levelling, blinding concrete for thermal insulation purposes, pipefilling, lightweight foundations, and trench reinstatement

Acoustic Properties of Autoclaved Aerated Concrete (AAC) based on Gypsum-Ceramic Waste (GCW)

Noise pollution and municipal solid waste (MSW) are two ongoing issues for inhabitants of urban due to the growth development. We need to manage of MSW such as gypsum and ceramic waste properly to solve environment and acoustic issues. To our knowledge, the gypsum and ceramic waste (GCW) are rich in silica and calcium oxide and have been recognized and approved to have a good building material such as lightweight concrete and also have a good sound insulation material. Meanwhile, autoclaved aerated concrete (AAC) is one of the lightweight concrete family members and the major chemical composition is silica, calcium oxide and small amount of iron and aluminum. Due to the similarities of major chemical composition between AAC and GCW, it was interesting to study the acoustic properties of AAC based on GCW as an alternative natural source for partial fine aggregate replacement. The objective of this work was to determine the performance of the acoustic properties of AAC based on GCW in addition to reduce the negative effect of GCW on the environment. The AAC with different composition of GCW (5%, 10%, and 15%wt) has been prepared according to ASTM C1693-09. The compressive strength was in range of 5.08 to 7.10MPa. The sound absorption of all samples has been carried out at range of 350Hz to 2000Hz according to ASTM E1050. The results found that AAC-GCW performed well in terms of sound absorbance but in different frequency range. The sound absorption coefficient was around 0.77 to 0.88 at 1050 – 1350Hz. Our results indicated the GCW can use as an alternative natural source for partial fine aggregate replacement on AAC and has improved the acoustic properties of AAC samples. The best sound absorption coefficient was showed by AAC with 10% wt of GCW i.e 0.88. Generally, AAC-GCW samples have higher sound absorbance coefficient compare to previous studies and suitable for wall application such as partition walls, party walls, and especially for sound insulation material

Acoustic Properties of Autoclaved Aerated Concrete (AAC) based on Gypsum-Ceramic Waste (GCW)

Noise pollution and municipal solid waste (MSW) are two ongoing issues for inhabitants of urban due to the growth development. We need to manage of MSW such as gypsum and ceramic waste properly to solve environment and acoustic issues. To our knowledge, the gypsum and ceramic waste (GCW) are rich in silica and calcium oxide and have been recognized and approved to have a good building material such as lightweight concrete and also have a good sound insulation material. Meanwhile, autoclaved aerated concrete (AAC) is one of the lightweight concrete family members and the major chemical composition is silica, calcium oxide and small amount of iron and aluminum. Due to the similarities of major chemical composition between AAC and GCW, it was interesting to study the acoustic properties of AAC based on GCW as an alternative natural source for partial fine aggregate replacement. The objective of this work was to determine the performance of the acoustic properties of AAC based on GCW in addition to reduce the negative effect of GCW on the environment. The AAC with different composition of GCW (5%, 10%, and 15%wt) has been prepared according to ASTM C1693-09. The compressive strength was in range of 5.08 to 7.10MPa. The sound absorption of all samples has been carried out at range of 350Hz to 2000Hz according to ASTM E1050. The results found that AAC-GCW performed well in terms of sound absorbance but in different frequency range. The sound absorption coefficient was around 0.77 to 0.88 at 1050 – 1350Hz. Our results indicated the GCW can use as an alternative natural source for partial fine aggregate replacement on AAC and has improved the acoustic properties of AAC samples. The best sound absorption coefficient was showed by AAC with 10% wt of GCW i.e 0.88. Generally, AAC-GCW samples have higher sound absorbance coefficient compare to previous studies and suitable for wall application such as partition walls, party walls, and especially for sound insulation material