Review Paper on the Study of Common and Plastic Aggregate (Recycled Aggregate)

Recent technology has also improved the recycling process. In this fast-growing world, the volume of construction of waste has suddenly increased in the recent decades. In a rapid industrialized world recycling play a very vital role to save our natural resources which are very limited. And we see that the various countries like America, china and other countries are widely adapt the recycled aggregates in


INTRODUCTION
The demolition of old building and with respect to their traffic infrastructure and their exchange with new once is the frequent phenomenon in large part of world, as we all know that the rapid industrialization required the large amount of construction material also land requirements In the present study the recycled plastics were used to prepares the coarse aggregates thereby providing the sustainable option to deal with the plastic waste which is todays headache. There are so many recycling plants all over India but plastics are recycled it lose its strength with the plastic waste. The rising needs of middle-class and lower-class peoples and abilities of to satisfy them to cheaper prize as compared to other materials like the glass and metals has to contributes to an increased consumption of plastics in last five years.
Plastics have become a crucial part of our current lifestyle, and the worldwide plastic production has increased vastly during the past 50 years. Plastics have been used progressively in a large variety of products because of their favourable properties, including low density, high strength-to-weight ratio, high durability, ease of design and production, and low cost.
Plastic is nearly inert that is it get very less affected by the chemicals and have higher durability. So, from above consideration we confess that we must preforms various tests on the aggregate like common aggregate and plastic-coated aggregate and compared all the physical properties and all required test and explores such a new thing which will used in future of civil engineering.
BASES OF NATURAL AGGREGATE: -There are two primary sources of natural aggregate: (1) exposed or near-surface bedrock that can be crushed, (2) deposits of sand and gravel. Sources for these basic materials can be grouped into three main areas: Mining of mineral aggregate deposits, including sand, gravel, and stone; use of waste slag from the manufacture of iron and steel; and recycling of concrete, which is itself chiefly manufactured from mineral aggregates.
BASES OF RECYCLED AGGREGATE: -Construction and demolished waste generated due to natural disasters, for future development the old buildings are replaced by new ones, and war inflicted damages. Crushing of Portland concrete pavement. Tested specimens from laboratory Concrete from ready mix concrete plants and precasting units worn out rail ballast.
II. IDENTIFY, RESEARCH AND COLLECT IDEA Plastic needs no introduction as it is the widely used material now a days on our Earth. Due to its properties like strength, durability and easy processing it can be used for many purposes. Studies shows that plastic is nearly inert that is it get very less affected by the chemicals and have higher durability. Disposal of plastic waste is a huge problem as due to absence of organic compounds, it is non-decomposable material and proves to be a threat to our environment as it has many health hazards. As decomposition of plastic is a serious problem as it takes very long time and adversely affection the environment in many ways. So, we can use it in construction, where we need life of structure to be improved and use of waste plastic after small processing can help us to reduce the waste in the environment which is new motto of civil engineering.

III. STUDIES AND FINDINGS
⮚ we study the properties of aggregates. ⮚ We doing the comparative study while on common aggregates and plastics aggregate. ⮚ we analyze which one is good in construction. ⮚ Identification of properties of aggregate: -Although some variation in aggregate properties is expected, characteristics that are considered include:
• particle shape and surface texture.
• abrasion and skid resistance.
• unit weights and voids.
• absorption and surface moisture.
⮚ Identification role of aggregate in practical life: -Aggregate in concrete is a structural filler, but its role is more important than what that simple statement implies. The composition, shape, and size of the aggregate all have significant impact on the workability, durability, strength, weight, and shrinkage of the concrete.
⮚ Utilization of aggregate all over world: -Construction aggregate, or simply "aggregate", is a broad category of coarse to medium grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world. Aggregates are a component of composite materials such as concrete and asphalt concrete; the aggregate serves as reinforcement to add strength to the overall composite material. Due to the relatively high hydraulic conductivity value as compared to most soils, aggregates are widely used in drainage applications such as foundation and French drains, septic drain fields, retaining wall drains, and roadside edge drains. Aggregates are also used as base material under foundations, roads, and railroads. In other words, aggregates are used as a stable foundation or road/rail base with predictable, uniform properties (e.g. to help prevent differential settling under the road or building), or as a lowcost extender that binds with more expensive cement or asphalt to form concrete. proportions of plastic aggregates in replacement of coarse aggregates and found the optimum result at 22% replacement of coarse aggregates with plastic aggregates. They further performed the test for other properties on concrete with 22% plastic aggregates and found that concrete with plastic aggregates was weaker in fire resistance LhakpaWangmoThinghTamanget. al. [4] in 2017 performed experiment on Plastics in Concrete as Coarse Aggregate. They performed the testing of mechanical properties of concrete containing Plastic aggregates They use plastic aggregates in proportion of 10%, 15%, and 20%. They found marginal reduction in strength and suggested the optimum result as 15% replacement Elango A and Ashok Kumar A [5] in 2018 performed study concrete with plastic fine aggregates. They used OPC 53 grade, River sand and crushed aggregates. They used plastic in place of fine aggregates in proportion of 10%, 20% and 30%. They test mechanical and durability properties on their concrete samples. They found the decrease in strength of concrete. But found that the concrete shows good results against acid attacks and increase in elasticity. So they concluded that the plastic aggregate concrete can be used in place where we need less compressive strength but more durability. [6]in 2011 prformed study on The compressive strength of concrete containing recycled aggregate at 1, 4, 7, 28 and 90 days was lower than that of the control specimen, but could be compensated by the use of 10% SF or 15% MK. However, the use of 30% FA or 55% GGBS lowered the strength.

Chaitradip Sarkar , Parikshit Chauhan ,NavedKhan ,Abu Sufiyan Khan ,Mohammad Aquib [7]Comparative
Study of Natural and Recycled Aggregate Concrete in this paper they studied According to the test results, the performance of recycled aggregate concrete, even with the total replacement of coarse natural with coarse recycled aggregate, is satisfactory and shows that there is enormous scope of this aggregate in at present and in future, not only in terms of the mechanical properties, V. IMPROVEMENT AS PER REVIEWER In this review paper we studied that the rising needs of middle class and lower-class people and ability of satisfy them to cheaper price as compared to other materials, in this we use the primary source of aggregate. Studies shows that the plastic is nearly inert that it gets very less affected by the chemicals and have higher durability. As plastic is very dangerous for decomposition as it takes very long and adversely effects on environment. from this we are improving the properties for reuse. As the previous study of the authors they can mainly focused on the waste plastics and its utilization in construction so there is a need of the improvement in our paper we are make an review paper so we study on both common aggregate and the plastic aggregate. While studying on plastic and the common aggregate we can analyze that we can use it as a partial replacement of an coarse aggregate also we can be used in the bituminous roads section as well as we want higher flexibility.
VI. CONCLUSION As we can studied the research of all authors from that we can conclude that there is some research required in plastic aggregate to used it in partial replacement of the common aggregate. As we can see nowadays the depletion of natural resources in main parts so we have to move towards our next option i.e. plastic or recycled aggregate so from our study on plastic aggregate it can be implies that we can gives an better option to society as well to our world.
From the above study the following conclusions can be drawn.
❖ Due to use of recycled aggregate in construction industry it can slow the impact of waste on environment.
❖ Higher ratio of Recycle aggregate can worsen the properties and strength of mix. ❖ It is clear that recycled aggregate can be used with natural aggregates. ❖ It can be studied that again much more enhancement is needed in the recycled aggregate to replace common aggregate.