Discover Civil Engineering (2025)

The Study of Light Weight Concrete using PET as aggregates

Examining Polyethylene Terephthalate (PET) as Artificial Coarse Aggregates in Concrete

Civil Engineering Journal, 2020

This study aims to examine the effect of recycled Polyethylene Terephthalate (PET) artificial aggregate as a substitute for coarse aggregate on the compressive strength and flexural strength, and the volume weight of the concrete. PET plastic waste is recycled by heating to a boiling point of approximately 300°C. There are five variations of concrete mixtures, defined the percentage of PET artificial aggregate to the total coarse aggregate, by 0, 25, 50, 75 and 100%. Tests carried out on fresh concrete mixtures are slump, bleeding, and segregation tests. Compressive and flexural strength tests proceeded based on ASTM 39/C39M-99 and ASTM C293-79 standards at the age of 28 days. The results showed that the use of PET artificial aggregate could improve the workability of the concrete mixture. The effect of PET artificial aggregate as a substitute for coarse aggregate on the compressive and flexural strength of concrete is considered very significant. The higher the percentage of PET pl...

Investigation on the Use of PET Waste Plastic as Coarse Aggregate for Lightweight Concrete

Plastic waste and its low recycling rate make a significant contribution towards the pollution of the environment. Plastic waste is utilised in different applications, such as aggregate in concrete. The development of new construction materials using recycled plastics is important to both the construction and the plastic recycling industries. This paper emphasizes on using the plastic waste PET (Polyethylene Terephthalate) to substitute the coarse aggregates in concrete to lower the density of concrete. The shredded waste plastic was used in concrete with partial replacement of 10%, 20%, 30% and 40 % by weight of conventional coarse aggregate. Five types of concrete specimens including one without plastic aggregate, for comparison purpose, were prepared. All the concrete specimens were tested for compressive strength after a curing period of 7, 14 and 28 days.

State-of-the-art Review: Concrete Made of Recycled Waste Pet As Fine Aggregate

It is well known that the foremost environmental sustainability concern derives from the abundance of the plastic waste. The growing problem of the plastic waste originates from the presence of Polyethylene terephthalate (PET) from plastic bottles. Nevertheless, the versatile performance of PET in terms of its lightweight, strong, flexible, moisture-resistant, and cheap can make it a replacement substance for aggregates in green concrete. On the other hand, PET replacement has mostly been restricted to non-structural uses, generally due to its lower strength/stiffness, larger creep and shrinkage, poorer durability associated to natural aggregate concrete (NAC). This paper presents a comprehensive review of the published studies on waste recycled plastic by means of fine aggregate replacements. Parameters including fresh concrete properties (workability and density) and the hardened concrete properties (compressive strength and splitting strength) have been considered. After a detailed review it was found that most of the studies conducted in the area of using PET as a fine replacement outlined the adherencebetween concrete and PET.

Use of Waste Plastic in Concrete Mixture as Aggregate Replacement

— One of the environmental issues in most regions of Iran is the large number of bottles made from poly-ethylene terephthalate (PET) deposited in domestic wastes and landfills. Due to the high volume of these bottles, more than 1 million m3 landfill spaces are needed for disposal every year. The purpose of this experimental study was to investigate the possibility of using PET waste in asphalt concrete mixes as aggregate replacement (Plastiphalt) to reduce the environmental effects of PET disposal. Concrete is the most widely used man made construction material in the w and its second only to water as the most utilized substance in the planet. Seeking aggregates for concrete and to dispose of the waste from various commodities is the present concern. Today sustainability has got top priority in construction industry. In the present study the recycled plastics were used to prepare the coarse aggregates thereby providing a sustainable option to deal with the plastic waste There are many recycling plants across the world, but as plastics are recycled they lose their strength with the number of recycling. So these plastics will end up as earth fill. In this circumstance instead of recycling it repeatedly, if it is utilized to prepare aggregates for concrete, it will be a boon to the construction industry. Most of the failures in concrete structures occur due to the failure of concrete by crushing of aggregates. Plastic aggregate which have low crushing values will not be crushed as easily as the stone aggregates. These aggregates are also lighter in weight compared to stone aggregates. Since a complete substitution for Conventional Aggregate was not found feasible, a partial substitution with various percentage of plastic aggregate was done. Both volumetric and grade substitution was employed in this investigation.

Manufacturing Light Concrete with PET Aggregate

ISRN Civil Engineering, 2012

The manufacture of concrete using a polymer instead of a stony coarse aggregate known as gravel is presented. Polyethylene terephthalate (PET) is the polymer used,recycling soft drink containers with sufficient tenacity. PET is a material commonly used by engineers as a structural element, not as an aggregate. The research work revealed that PET aggregate produces good quality mixtures with lower volumetric weight but mechanical behavior similar to that of natural concrete with adequate granulometry.The water/cement (W/C) ratio is lower for light concretes than for natural concrete. Regarding stress and Flexural strength, it was found that for 300 kg/cm3and higher cement consumption, which may be due to the fact that at lowW/Cratios, the coarse aggregate behavior prevails, while at highW/Cratios, the paste behavior prevails. This leads us to the fact that PET aggregate is best applied on low cement consumption up to 300 kg/m3, since expensive mixtures for higher consumption may resu...

A REVIEW ON THE USE OF POLYETHYLENE TEREPHTHALATE (PET) AS AGGREGATES IN CONCRETE

Malaysian Journal of Science (MJS), 2018

Massive amount of plastic and polymer products are being produced worldwide on a daily basis. Most of these are intended to be recycled, but the reality is quite different. Statistics show that the percentage of recyclable plastic and polymer products that are actually recycled is very insignificant. These plastic products are mostly non-biodegradable. As a result, they persist in the environment as potential pollutants. Hence there have been countless attempts to reuse these plastic products through versatile applications. This paper attempts to compile the studies which explored the reusability of plastic products in structural concrete. The principal focus will be on use of recycled Polyethylene Terephthalate (PET) in structural concrete in various forms. This study concludes that incorporating PET as a supplementary material in different forms has both beneficial and harmful impacts on various fresh and hardened properties of concretes and thus should be considered for comprehensive investigation.

Modified Concrete Using Polyethylene Terephthalate Plastic Waste as a Partial Replacement for Coarse Aggregate

Open Journal of Applied Sciences

The effect of recycled Polyethylene Terephthalate (PET) bottles waste as a fine aggregate replacement in concrete

2019

This research aims to study the potential of PET bottles waste as a fine aggregate replacement in concrete. PET bottles waste was preferred because it is readily available, and it causes an environmental problem. The PET bottles waste was grinded into a fine particle which is similar to sand particle size. Then, it was partially replaced by sand with 0.5%, 1% and 1.5% in the concrete mix. This mix design is referred from the Department of Environment (DOE) method, and test specimen was cast for M30 grade concrete for 7-days,28-days, and 90-days. The performance of recycled PET bottles concrete were investigated based on several experimental methods such as slump test, compressive strength test and flexural strength test

Replacement of coarse aggregate by Polyethylene Terephthalate in Light Weight Concrete: A Review Paper

This study utilizes Polyethylene Terephthalate (PET) plastic waste which is light as coarse aggregate. The coarse aggregate from PET plastic waste is the result of the PET-heated to produce agglomeration and then it is cooled and crushed into aggregates that have variety of sizes with certain gradations. The purpose of this study is to determine the compressive strength of light concrete of PET plastic waste as coarse aggregate and influence of aggregate gradations towards the compressive strength of concrete that is produced. This work reviews several previous studies on the utilization and preparations of plastic materials and their effect on the physical and mechanical properties of concrete. The concrete with PET plastic waste can be used not only as an effective plastic waste management practice but also as an strategy to develop more economic and sustainable building materials in the future.