Characterization of three recycled materials for alternative use of mortars

Because natural resources in construction are limited, it is advisable to look for new alternatives that meet comparable functions, and likewise, reduce consumption of non-renewable resources. The use of recycled materials is of benefit to the uncontrolled eliminations of residues that cause the use of the public resources, such as landfills. In addition, this contributes to the reduction of the environmental imact caused by the industries in the process of obtaining the same ones. Therefore, recycled materials such as concrete or masonry demolished, glass and ceramics different, can be employed in different ways to be used in the construction industry. This work focuses on presenting the initial characterization of three reveled materials as an alternative to use in relacement of natuals sand in mortars, this as a first step for furher study in different percentages of replacement, as currently his inderstanding is unknown, or little known.Peer ReviewedPostprint (published version

Evaluation of the effects of waste glass in asphalt concrete using the Marshall test

The study investigates the use of waste glass as filler in asphalt concrete. Waste glass constitutes a significant proportion of the waste generated in both developed and developing countries. Successful utilization of the waste glass in asphalt will reduce the problem faced by environmental agencies at ensuring safe disposal of the non-biodegradable waste and may improve the asphalt properties. In the study, a waste glass in form of a filler was introduced into the asphalt mix at 8%, 10%, 12%, 14%, 16%, 18% and 20% of the total mix. The asphalt concrete samples with and without waste glass as filler were subjected to the Marshall test to determine the stability, flow, air voids, void in mix aggregate and void filled with bitumen. The Marshall test results show that stability increases when increasing glass filler up to 18%, although the values were lower than of the asphalt concrete without waste glass. This implies improved resistance to fatigue for higher waste glass content. Also, the flow increases with increasing glass filler, which implies the resistance to permanent deformation which did not improve. Generally, the introduction of waste glass in the asphalt concrete is environmentally friendly, and it will aid the sustainable management of waste glass

Effect of Partial Replacements of Coarse Aggregate by Polycarbonate Plastic Waste on the First Crack Impact Resistance of Concrete Beam

This paper examines impact strength properties of concrete in which different amounts 2.5%, 5% and 10% of polycarbonate plastic waste particles were used as coarse aggregate replacement. For each amount, six beams of 100 mm ×100 mm × 500mm were subjected to 4.5 kg hammer from 457 mm height. The number of blows of the hammer required to induce the first visible crack of the beams were recorded. The results are presented in terms of impact energy required for the first visible crack. The concrete mixtures exhibited ability to absorb a large amount of impact energy. The polycarbonate plastic waste increased the first crack impact energy of concrete. Keywords: Polycarbonate plastic waste; Cement concrete; Compressive strength; First crack impact energy. DOI: 10.7176/JEES/10-2-06 Publication date: February 29th 202

The Influence of Replacing Sand with Waste Glass Particle on the Physical and Mechanical Parameters of Concrete

Glass is a special type of materials which is widely used in various forms and colors for different usages. Colored bottles comprise a large part of waste glass. To reduce the destructive effects of waste glass on the environment, it might be recycled. However, some indecomposable waste materials are buried. This will have harmful effects on the environment. A practical solution for reducing non-recyclable waste colored glass is using them as replacements for materials in other industries such as concrete industry. The effect of replacing aggregate with waste glass particle on the compressive strength and weight of concrete is investigated in this study. To achieve the goal, totally 27 cubic specimens were created; 6 specimens were made of concrete, while waste glass particle was added to the mix of other specimens. To prevent Alkali Silica Reaction (ASR), Microsilica was added to the mix of specimens containing glass. Generally, Results indicated that replacing aggregate with glass particle more than 30% lead to increment in compressive strength of concrete. The weight of concrete remains almost the same in all of the specimens. Briefly, based on the results it could be concluded that the optimum percentage for replacing aggregate with glass particle is 50%

Recycled Fibers for Sustainable Hybrid Fiber Cement Based Material: A Review

Reinforcing fibers have been widely used to improve physical and mechanical properties of cement-based materials. Most fiber reinforced composites (FRC) involve the use of a single type of fiber to improve cement properties, such as strength or ductility. To additionally improve other parameters, hybridization is required. Another key challenge, in the construction industry, is the implementation of green and sustainable strategies based on reducing raw materials consumption, designing novel structures with enhanced properties and low weight, and developing low environmental impact processes. Different recycled fibers have been used as raw materials to promote circular economy processes and new business opportunities in the cement-based sector. The valuable use of recycled fibers in hybrid FRC has already been proven and they improve both product quality and sustainability, but the generated knowledge is fragmented. This is the first review analyzing the use of recycled fibers in hybrid FRC and the hybridization effect on mechanical properties and workability of FRC. The paper compiles the best results and the optimal combinations of recycled fibers for hybrid FRC to identify key insights and gaps that may define future research to open new application fields for recycled hybrid FRC.TRUEComunidad de Madridpu

Effect of Partial Replacements of Sand by Polycarbonate Plastic Waste on the First Crack Impact Resistance of Concrete Beam

Disposal of waste polycarbonate plastic is a serious environmental issue all around the globe, on account of its health hazard and difficulty in land filling. As a possible solution to the problem of polycarbonate plastic waste, an experimental study was conducted to examine the potential of using it as sand replacement in the concrete. This paper examines impact strength properties of concrete in which different amounts 2.5%, 5% and 10% of polycarbonate plastic waste particles were used as sand replacement. For each amount, six beams of 100 mm ×100 mm × 500mm were subjected to 4.5 kg hammer from 480mm height. The number of blows of the hammer required to induce the first visible crack of the beams were recorded. The results are presented in terms of impact energy required for the first visible crack. The concrete mixtures exhibited ability to absorb a large amount of impact energy. The polycarbonate plastic waste increased the first crack impact energy of concrete. Keywords: Polycarbonate plastic waste; Cement concrete; Compressive strength; First crack impact energy. DOI: 10.7176/CER/12-2-05 Publication date: February 29th 2020

Advanced tests for durability studies of concrete with plastic waste

This paper reviews the literature available on utilisation of waste materials in concrete and its effect on the strength and behaviour of concrete. Considering the effect of over-exploitation of natural sand from river beds for ever increasing concrete production, alternatives to natural sand are being explored. One such alternative discussed in this paper is shredded/pulverised recycled plastic waste which has been used as a partial replacement for natural sand (replacements up to 20-40 % by volume). The option of partially replacing ordinary Portland cement with ground granulated blast furnace slag is also explored. Concrete produced with plastic waste is expected to give lower values of 28-days characteristic strength and at the same time there can be questions regarding its long term durability and behaviour during fire. This paper explores various tests that can be performed to determine long term durability, chloride ingress resistance and fire performance

An Experimental Study of Plastic Waste as Fine Aggregate Substitute for Environmentally Friendly Concrete

Decomposing plastics, including plastic bottles, is a very difficult process because it takes 50-100 years. Every year, the use of plastic bottles is increasing, but only few people are willing to treat plastic bottle waste. In this study, plastic bottle waste is used as a substitute of fine aggregate and shaped in such a way to have a sand-like gradation. The variations of graded plastic bottle waste are 0%, 5%, 10%, and 12%. The test objects for each variation consist of three specimens. Data are analyzed by using regression and classical assumption test with SPSS program. The results of the data analysis show that there is a simultaneous effect on the compressive strength with variations in plastic waste substitution. The compressive strength decreases with the increase in the percentage of plastic added. Maximum compressive strength is at the variations of 0% and 5% with19.192 MPa and 16.414 MPa, respectively

Effect of Recycling Waste Glass as Fine and Coarse Aggregate on Same Properties of Concrete

This research aims to study the possibility of reuse of glass waste as a partial replacement in the first two cases, instead of fine aggregates and weight ratios (5%, 10%, 15%, and 20%) percent, in the second case a partial replacement of the coarse aggregates and the same proportions of the previous weight. The results showed that increasing the content of these wastes replaced by sand Resulted in a decrease in density and an increase in compressive strength at 28 days(16%,18%,27%,22%) respectively. The increase in splitting strength was 28 days (17%, 18.4%, 24.8%, 18%) respectively. The decrease in density was (1.5%,3%,4.4%,6%)respectively. The greatest effect was the compressive strength and splitting strength at 15% the replacement ratio. The results showed that increasing the content of these wastes replaced by gravel Resulted in a decrease in density and an increase in compressive strength at 28 days(12%,14%,16%,11%) respectively. The increase in splitting strength was 28 days (8.4%, 10.4%, 12%,8%) respectively. The decrease in density was(2.8%,4%,5.2%,6.4%)respectively. The greatest effect was the compressive strength and splitting strength at 15% the replacement ratio. The experimental results obtained from the modeling test showed that substituting the sand gave a higher density than replacing the gravel as well as compressive resistance and exhalation higher than gravel replacement