Coarse aggregate replacement.Coarse aggregate 1 coarse aggregate gsmohan 1011210335 1 2 introductionaggregate are the important constituent in concrete aggregate are granular material derived from the most part from the natural rocks crushed stones or natural gravels and sands aggregate generally occupy about 70 to 80 of the volume of concrete and can therefore.
After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste.By collecting the used concrete and breaking it up, recycled concrete aggregate rca is created fig.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.
Coarse aggregate, plastic aggregate, partial replacement, volumetric substitution, grade substitution.Introduction concrete is the most widely used man made construction material in the world and its second only to water as the most utilized substance in the planet.
High-density polyethylene can be added to concrete and sand as a feasible replacement for course aggregate.Research has shown that plastic bags that are tightly packed and then heated, shrink to a size that can easily be used in concrete.But as the name implies, the material is too ductile at full strength to support structural loads at 2500psi.
Wastes in concrete will contribute to the sustainability of the concrete design and the natural environment.The project aims at use of recycled plastic in concrete as a partial replacement of coarse aggregate.The maximum percentage of aggregate replaced by shredded plastic as been determined based on detailed experimental study.
A project report on behaviour of concrete by partial replacement of coarse aggregate with recycled plastic granules.
Partial replacement of coarse aggregate with broken ceramic tiles in concrete production yiosese a.Abstract the study reports on experimental investigation on the suitability of the use of broken tiles as partial replacement for crushed granite in concrete production.
Bottom ash as aggregate replacement in concrete 5.Report date june 2013 6.Performing organization code 7.Authors jeffery s.Performing organization report no.Project 00036313 9.Performing organization name and address center for transportation infrastructure and safetynutc program missouri university of science and technology.
The results proved that the replacement of 100 of fine aggregate by bottom-ash achieved higher compressive strength.Thus the environmental effects due to illegal extraction of sand and cost of conventional fine aggregate can be significantly reduced.Key words bottom ash, fine aggregate, replacement, concrete 1.
Concrete as partial replacement of portland cement or a substitute of aggregates.For example, copper slag has number of favourable mechanical properties to be used as an aggregate such as excellent soundness characteristics, good abrasion resistance and good stability.Also, copper slag exhibits pozzolanic properties.
Replacement of natural sand pofale et al 2013.The present study aimed to utilizing stone dust as fine aggregate in concrete in place of natural fine aggregate.For that an experimental programme was carried out to study the suitability and potential use of stone dust as partial replacement of fine aggregate in concrete.
The recycled coarse aggregate replacement percentages have limited influence on the ultimate stresses of the racfst columns and has more effect than that of the normal aggregate concrete-filled steel tubular columns.
For the replacement of fine aggregate in concrete.Aggarwal et al 3 observed that the bottom ash can be replaced as fine aggregate upto 50 without affecting the properties of concrete.25 had done experimental investigation on partial replacement of fine aggregate.
Replace fine aggregates or natural sand as if you replace fine aggregates from concrete it will become no fines concrete used for specific purposes to prepare pervious media.If you want to replace natural sand on the other hand there are ple.
Recycled aggregate concrete is viewed as an attempt to conserve the natural resource and preserving the environment ecologically balance.The recycled aggregate concrete are replacement with coarse aggregate when exceed the limit it have some disadvantages from its characteristics, property and behavior.Some drawbacks of.
Without concrete, the community and society today could not exist.Therefore, lots of researchers and engineers are doing the research of the aggregate sources.All these research as alternative sources for the replacement of the natural aggregates in producing concrete in the various future construction works.
Strong need to utilize waste glasses.Many efforts have been made to use waste glass in concrete industry as a replacement of coarse aggregate, fine aggregate and cement.Its performance as a coarse aggregate replacement has been found to be non-satisfactory because of strength regression and expansion due to alkali-silica reaction.
A viable fine aggregate replacement from this investigation, it can be concluded that ba can be satisfactorily used as a partial fine aggregate replacement in concrete up to 20 per cent of the total fine aggregate content with minimal effect on the fresh and hardened concrete properties.
Aggregate with replacement levels of 10, 20, 30, 40, and 50.Besides, five mixes incorporated fine crushed ceramic as partial substitute of fine aggregate with replacement levels of 20, 40, 60, 80, and 100.Slump test was conducted to investigate the effect of incorporating ceramic aggregates on the workability of fresh concrete.
It is advisable to not replace gravels with other consituents as possible as you can.Ofcourse coarse aggregates can be replaced with broken concrete debris however we are compromising the quality of resultant concrete upto some level that doesnt.
The purpose of this paper is to examine the use of a waste marine sea shell product incorporated into a concrete mix as an aggregate replacement.Utilising shells reduces the storage of shell waste, also reducing the need for quarried aggregate and has potential benefits of adding a different material to a design mix concrete mix design for improved performance., the test methods used.
This study investigated the mechanical behavior of normal strength ns and high strength hs concrete containing recycled fine aggregates rfas.A high slump mixing design was employed, which may be potentially used as filled structural concrete.The compressive strength, tensile strength, and elastic modulus were measured according to the rfa replacement ratio and curing time.
Aggregate is a granular material, such as sand, gravel, crushed stone used with a cement to produce either concrete or mortar.Aggregate is relatively inexpensive and does not enter into complex chemical reactions with water it has been customary, therefore, to treat it as inert filler in concrete.