By collecting the used concrete and breaking it up, recycled concrete aggregate rca is created fig. View waste material based concrete ppts online, safely and virusfree. Some of the important elements in this respect are the reduction of the consumption of energy and natural raw materials and consumption of waste materials. Replacement of recycled coarse aggregates with natural.
Replacement of recycled coarse aggregates with natural coarse aggregates in concrete. Highstrength structural concrete with recycled aggregates. The suitability of recycled plastics as coarse aggregate in concrete and its advantages are discussed here. Recycled concrete sand pty ltd is a dynamic innovative company based in cape town south africa. By adding a portion of recycled aggregate instead of natural aggregate coarse into the mixture, producing the recycled concrete, which can. Use of recycled aggregate in concrete can be useful for environmental protection and economical terms. Bulk density of aggregate the bulk density of the recycled aggregate, due to a higher porosity of mortar layer, has a lower value than the bulk density of natural aggregates and. Highstrength structural concrete with recycled aggregates a dissertation submitted by nelson, shing chai ngo. Recycled concrete aggregates rca contain not only the original aggregates, but also hydrated cement paste. According to bodin and zaharieva, precautions must also be taken of pathological reactions such as alkali aggregate reaction and sulphate reaction in the.
In order to evaluate their potential use of recycle materials in highway construction, two different recycled concrete aggregate rca materials and two. Literature survey limbachiya and leelawat 2000 found that recycled aggregate concrete had 7 to 9% lower relative density and 2 times higher water absorption than natural aggregate. The widespread use of this material has led to continuous developments such as ultrahigh strength concrete and selfcompacting concrete. Recycled coarse aggregates international journal of advanced technology in civil engineering, issn. Mix design for pervious recycled aggregate concrete open. First effort has been made by nixon in 1977 who complied all the work on recycled aggregate carried out between 19451977 and prepared a stateof. Construction materials are increasingly judged by their ecological characteristics. Crushed concrete aggregates properties and uses of. The unique properties of recycled aggregates provides, superior compaction and constructability.
Recycled concrete aggregate an overview sciencedirect. One of the major challenges of our present society is the protection of environment. However, with urbanisation comes the moral responsibility of sustaining the environment. The use of plastic is increasing day by day, although steps were taken to reduce its consumption. The extensive research on recycled concrete aggregate and recycled aggregate concrete rac as started from year 1945 in various part of the world after second world war, but in a fragmented manner. Recycled aggregate concrete is defined as concrete manufactured with waste materials in order to reduce the negative environmental impact that results from the manufacturing process of cement, achieving a more sustainable product. The characteristic of recycled aggregates could be different by its parent concrete because the parent concrete was designed for its purposes such as permeable, durable and high strength concrete. Recycled concrete sand sustainable concrete sand solutions.
Find powerpoint presentations and slides using the power of, find free presentations research about recycled aggregate concrete ppt. Recycled aggregate concrete is in close proximity to normal concrete in terms of split tensile strength. The scope of this project is to determine and compare the. Recycled plastics as coarse aggregate for structural concrete. After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. Recycled aggregate self compacting concrete prashant o.
Recycled concrete aggregates ppt download slideplayer. In general, the reuse and recycle of construction waste is concentrated in the preparation of recycled aggregate for concrete. Mix design for pervious recycled aggregate concrete. Mixes with 10%, 30%, 50% and 100% by volume replacement of fine natural aggregates fna with fra were produced and tested for water.
In this study, total 90 cylinders and 5 beams were prepared with stone aggregate and 5%, 10%, 15% and 20%. In addition, the use of rca leads to a possible solution to the environmental problem caused by concrete waste and reduces the negative environmental impact of. Recycled aggregates in concrete aggregate research. Review article assessment of recycled aggregate concrete parekh d. This paper focuses on the possibility of the use of recycled aggregate concrete as a structural material. This creates substantial garbage every day which is much unhealthy. Laboratory and field performance of recycled aggregate base in a seasonally ppt. Recycled concrete as aggregate for structural concrete. Pdf recycled aggregate concrete as structural material. There are many testing based on the recycled aggregate have been carried out all around the world. The aggregates are categorized by size as coarse and fine aggregate. The slump of recycled aggregate concrete is more than the normal concrete. Properties of recycled aggregate 510mm not less than 10mm no 1st 2nd 3rd water absorption % recovery percentage % recycled fine aggregate recycled coarse aggregat e powder size of supplied concrete lumps sand gravel cement paste no 1st 2nd 3rd original concrete number of crushing treatment number of crushing treatment. Find powerpoint presentations and slides using the power of, find free presentations research about non destructive test for concrete ppt.
One of the major challenges of our present society is the protection of environment some of the important elements in this respect are. This version of concrete is made up from the mix of the industrial waste and inorganic polymer. Meanwhile, the alkalinity of recycled aggregate concrete, chloride and sulphate contents of recycled aggregate have not been adversely affected. As interest in sustainable materials such as recycled aggregate concrete rac rises, effort, it is important to understand the properties of rac that relates to its. Recycling concrete and asphalt has been taking place in the usa since at least the early 1970s nanasy 1972, and by the 1990s was a wellestablished activity. Strength and durability evaluation of recycled aggregate. Recycled glass aggregate concrete decor magazine vol.
Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete. The fra used come from demolished concrete of known properties. Use of recycled aggregates in concrete a paradigm shift. For that purpose an experimental study of the shear behaviour. Abstractthe use of recycled concrete aggregate rca in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for virgin aggregate. This is a high school building, 35% of coarse aggregate were replaced by recycled concrete aggregate. Environmental suitability of recycled concrete aggregates.
Recycled aggregate was made by crushing the waste concrete of laboratory test cubes and precast. The utilisation of recycled concrete aggregate rca in selfcompacting concrete scc has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. Concrete recycling gains importance because it protects natural resources and eliminates the need for disposal by using the readily available concrete as an aggregate source for new concrete or pavement subbase layers. However, to date limited research exists exploring the use of coarse rca in scc. View and download powerpoint presentations on non destructive test for concrete ppt. It is called recycled aggregate which can be produced by concrete crusher. Use of industrial, construction and demolition waste focuses on the recent development which the use of various types of recycled waste materials as aggregate in the production. Recycled concrete aggregate powerpoint presentation. Replacement of conventional aggregate by recyled aggregate free download as powerpoint presentation. Replacement of conventional aggregate by recyled aggregate.
Hanson and torben 1986 stated that since 1945, the research on recycled aggregate had been carried out in many countries. The adobe flash plugin is needed to view this content. Files download recycled concrete aggregate powerpoint presentation free. In this paper, the effects of various percentages 0%, 25%, 50%, 75%, 100% of recycled aggregate ra on compressive strength of recycled aggregate concrete rac were investigated. The work presented in this paper seeks to build on the existing knowledge in this area by. Strength variation of concrete produced from recycled aggregate is higher than concrete made from natural aggregate. Recycled aggregate in concrete civil engineering community. For the recycled aggregate concrete, it would be necessary to add more cement in concrete made with 100% of recycled aggregate in order to achieve the same workability and compression strength as conventional concrete. Download as ppt, pdf, txt or read online from scribd. The most commonly used way to produce green concrete is by using the industrial waste products such as fly ash, blast.
Concrete production using recycled waste plastic as aggregate. Recycled concrete aggregate ppt video online download. College of engineering, pusad 445204 2 secretery, maharashtra state board of technical education, mumbai 51 abstract an experimental inves tigation was conducted on self compacting concrete with different. This paper focuses on coarse rca which is the coarse aggregate from the original concrete that is created after the mortar is separated from the rock. Ra is used to replace natural aggregate na as coarse aggregate in concrete mixes. Ppt batching effects on properties of recycled aggregate. View and download powerpoint presentations on recycled aggregate concrete ppt. Recycled aggregate an overview sciencedirect topics. Properties of selfcompacting concrete with recycled. Files download recycled concrete aggregate powerpoint presentation free one of the major challenges of our present society is the protection of environment some of the important elements in this respect are the reduction of the consumption of energy and. The use of recycled concrete aggregate materials in highway constructions as compared to the use of virgin materials reduces virgin natural resource demands on the environment. Green concrete is that type of concrete that is used to create the construction materials having a lesser effect on the environment. In this paper, the permeability properties of fine recycled aggregate concrete are presented.
It has been shown that the application of coarse recycled concrete aggregate, as the component materials in the con crete mixtures, it is possible to produce. I would like to express my gratitude to all those who gave me the possibility to complete this project. Ppt batching effects on properties of recycled aggregate concretes for airfield rigid pavements powerpoint presentation free to download id. Modani 1, vinod m mohitkar 2 1 assistant professor, b. This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Recycled aggregate occurs as either recycled concrete aggregate rca or recycled asphalt pavement rap. Files download recycled concrete aggregate powerpoint presentation free one of the major challenges of our present society is the protection of environment some of the important elements in this respect are the reduction of the consumption of energy and natural raw materials and consumption of waste materials.