آخرین محصولات
Evaluation of recycled concrete aggregate in asphalt mixes
This paper investigates the feasibility of using recycled concrete aggregate (RCA) as a replacement to the natural aggregates (NAs) in hot mix asphalt (HMA).
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Concrete Mix Design for Completely Recycled Fine Aggregate by …
As the compacted bulk density of 1 m of the aggregate mixture at this proportion is 1835 kg/m, the content of the CRFA, crushed aggregate 1, and crushed aggregate 2 in 1 m of the concrete is equal to 734, 220, and 881 kg/m. The compacted bulk density of the mixed aggregate (kg/m. Note: MFF: the mass fraction of the fine aggregate.
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Use of recycled plastic in concrete: A review
Results indicate that there is a chance to replace fine or coarse aggregate with PVC aggregate not more than 30% for the production of concrete with acceptable properties. At this plastic content there is a margin loss of workability, absorption, and different strengths. Compressive and splitting tensile strengths loss was found not more …
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Using recycled coarse aggregate and ceramic waste to produce
In this research, experimental work was conducted to validate the efficiency of Ceramic Waste Powder (CWP), Ceramic Fine Aggregate (CFA) and Recycled …
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Modified recycled concrete aggregates for asphalt …
Using recycled concrete aggregate (RCA) in an asphalt mixture has many economic and environmental benefits for our society. However, due to the poor adhesion of RCA to asphalt binder, the …
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Mechanical Properties of Concrete Using Recycled Aggregates
The M2 (50% replacement of fine natural aggregate) and M4 (50% replacement of natural coarse aggregate by recycling) mixtures were selected based on results for flexural (modulus of rupture) and compressive strengths of the concrete mixtures concerning the behavior of the reference mixture and the established design strengths.
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Recycling of waste glass as aggregate in cement-based materials
20 μm waste glass at 20% cement replacement obtains optimal results. •. 20% fine aggregate for waste glass obtains satisfactory results. •. Waste glass provides a poor coarse aggregate due to the smooth surface of glass. Glass is a common material made from natural resources such as sand. Although much of the waste glass is …
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Use of recycled concrete aggregates in asphalt mixtures for …
Giri et al. (2018a) studied the replacement of the coarse fraction of aggregates in a DBM mix. Previously, particles were superficially treated with asphalt …
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Replacing Coarse Aggregate in Concrete: Alternative Materials …
1. Fibrous Concrete Or Papercrete 2. Plastic Waste 3. Glasscrete 4. Expanded Polystyrene Concrete 5. Crushed Rubber 6. Coconut Shell 7. E-waste Partial Replacement What Is …
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Performance of recycled waste glass sand as partial replacement …
The aggregate to be tested was added to Fehling's solution, and the resultant mixture was heated. A reddish-brown precipitate indicates the presence of sugar in aggregate. In this research, fresh and hardened concrete properties were also evaluated to investigate the effect of using RGS in concrete as a partial fine aggregate replacement.
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Research on the Mechanical Properties of Recycled Aggregate …
The influences of the water cement ratio and recycled aggregate replacement rate on the stress–strain curve, elastic modulus, compressive strength, peak strain, and failure mode are studied. In Section 5, the influence of the water cement ratio and replacement rate on the meso damage mechanism is analyzed based on the statistical …
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Mechanical evaluation of recycled aggregate mixes and
Abstract Background The depletion of natural resources has led to the need of looking out for alternatives of primary construction materials. The use of reclaimed …
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A systematic review of the utilization of waste materials as aggregate
The waste materials used as an aggregate replacement in the SMA mix are recycled asphalt pavement, recycled concrete, steel slag, palm oil clinker, waste ceramic, shredded waste plastic, and crumb rubber. ... Yap, Yuen, Onn, Koting, Babalghaith (2020) Laboratory study on recycled concrete aggregate based asphalt mixtures for …
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Mechanical evaluation of recycled aggregate mixes and
The trend shown in Fig. 5d reflects that unit weight of the mix increases continuously with increase in percentage replacement of fresh aggregate due to increased unit weight of recycled aggregates. This is due to intrusion of binder into micro-pore structure of aggregates and coating on the exterior surface in recycled aggregates.
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The Effect of Recycled Waste Glass as a Coarse Aggregate on …
The mixture proportions of the OPC and geopolymer concretes are shown in Table 2, where the natural coarse aggregates (crushed granite) were replaced with a 0, 10, 20, 30 and 40% recycled glass aggregate. The …
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Study on the Compressive Properties and Factors of Recycled Mixture
This paper focuses on the disposal of iron tailings sand (ITS) and recycled aggregate of inorganic (RAI) and proposed the “ITS plus RAI” solid waste treatment methods, which uses ITS and RAI as a new base course material to replace new aggregates by 100% to apply in the pavement renovation project of national and …
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Recycled Glass Cullet as Fine Aggregate and Partial Cement Replacement
The figure shows that fissures were developed around the glass areas. The glass aggregates possibly caused the fissures in the cement mix and spread with time by the ASR situation [85].Another ...
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Comparative Study of Concrete with Polypropylene and
A wide range of replacement percentages was chosen with 2% to volume. The compressive strength results showed a slight reduction of 15.7% in strength for PET replacement up to 50%. Choi et al. replaced fine aggregate with recycled PET aggregate, 25%, 50%, and 75% by mass. However, PET aggregate was coated with …
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Recent developments in asphalt-aggregate separation …
In addition to the conventional mix design of hot recycled asphalt mixture, the separated coarser RAP materials can also be directly used as raw crushed stone because of their low asphalt content on the surface (<1.5%). In contrast, the separated finer RAP materials have a greater utilization value owing to the rich asphalt content.
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Resurfacing Performance Evaluation of Recycled Mixture with …
The replacement of cement-stabilized aggregate with the recycled mixture in pavement engineering not only helps to solve the problem of ITS stockpiles but also reduces carbon emissions. The carbon emissions will be generated in the gravel mining process, the processing process, and the rolling stage.
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Waste plastic as partial replacement for aggregates- a …
Coarse stone aggregate as a partial aggregate component was replaced by flake HDPE type plastic in 0, 25 and 50% replacement to coarse stone ratios. The compressive strength - unit weight of the ...
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Partial Replacement of Sand with Waste Glass in Concrete
The response of the blended mix to sulphate and acid attack was significantly better than that of the control concrete mix. Ibrahim (2020) utilized waste glass as a partial replacement for coarse aggregate, with ratios of 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50% by weight. At both the hardened and fresh stages, …
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RECYCLED PLASTIC AS COARSE AGGREGATE …
Dec 2000. CEMENT CONCRETE COMP. Salah S. Zoorob. Latif Budi Suparma. View. Show abstract. Use of waste plastic in concrete mixture as aggregate replacement. Article. Nov 2007.
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Waste-Glass As A Partial Replacement For Fine Aggregate In …
We have experimented on concrete cubes of 10 cm size and M20, M25 and M30 grade. Here crushed waste glass is used to replace the fine aggregate up to some proportion as a filler material that may ...
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Recycling | Free Full-Text | The Effect of Recycled HDPE Plastic …
The use of HDPE for non-structural uses was discussed by Lopez et al., who considered using recycled HDPE as a partial replacement of coarse aggregate in mixes of Acrylic Polymer Pervious Concrete (AcPPC) at ratios of 10%, 20%, and 30% at sizes of ½″ and ¾″. The study showed that the optimum strength was reached by a 10% addition at ...
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HDPE and PET as Aggregate Replacement in Concrete: Life …
Assuming that plastics can be used to replace 20% of the volume of natural aggregates in a typical concrete mix, 1.4 Mt of the 2.5 Mt post-consumer plastic waste generated per year could be utilised in concrete [6], which in turn would also conserve quarry aggregate materials and river sand.
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Investigation of the effectiveness of CFRP strengthening of
Experimental research was conducted involving the casting and testing 54 plain and confined concrete cylinders. A concrete mixture was designed in which the fine aggregate was partially replaced by polyethylene terephthalate (PET) waste plastic at ratios of 0%, 25%, and 50%, and with different w/c ratios of 0.40, 0.45, and 0.55.
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Use of recycled fines from waste concrete as an admixture in new
The use of recycled powder is an opportunity for the valorization of waste concrete and a need for its full recovery. Especially for the fraction with particle size below 2 mm of recycled aggregate, obtained from primary crushing of waste concrete, recent investigations have provided new potential applications.
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Partial Replacement of Fine Aggregate in Concrete by Tyre Rubber
Malek K. Batayneh et al, (2008).A research was carried out to find a positive method for disposing non-decaying materials, such as reuse in concrete mixes. Crumb rubber was used in the concrete mix to partially substitute for fine aggregate (sand) in various percentages of 20%, 40%, 60%, 80%, . For each mix, cubes of …
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Recycled Aggregates
Only up to 10 to 20 percent fine RCA is beneficial. The aggregate should be tested at several substitution rates to determine the optimal rate. Often recycled aggregate is combined with aggregate when used in new concrete. An example of a mix design using recycled aggregates in a pavement application is shown following table.
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