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IMPACT OF COARSE AGGREGATE ON COMPRESSIVE

2020-5-15  Production of concrete requires wa ter that is free from suspended particles, inorganic salts, acids and alkalis, contamination and algae (Elices and Rocco, 2008). ... cement, sand to stone in proportion of 1:2:3, with water-cement ratio of 0.70. The material was mixed ... Impact of Coarse Aggregate on Compressive Strength of Concrete ...

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Replacement Of Coarse Aggregate In Concrete

2021-8-29  Coarse aggregates are uneven and granular materials such as gravel, sand, or crushed stone, and are utilized for making concrete. As concrete demand a nd conumption is increased rapidly demand of natural aggregate also rised. Similarly, the production of natural coarse aggregate is not sufficent ro satisfied these increased demand.

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Aggregates for Concrete

2017-8-5  Hydraulic cement concrete is a cement and water paste in which aggregate particles are embedded. Aggregate is granular material such as sand, gravel, crushed stone, blast-furnace slag, and lightweight aggregates that usually occupies approxi-mately 60 to 75% of the volume of concrete. Aggregate properties significantly affect the workability of ...

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TOWARD THE USE OF HIGH VOLUME COARSE

2014-10-22  TOWARD THE USE OF HIGH VOLUME COARSE RECYCLED CONCRETE AGGREGATE IN NEW CONCRETE PRODUCTION BY Anto Sucic, B.Eng Ryerson University 2006 – 2010 A Thesis Presented To Ryerson University In Partial Fulfillment of the Requirements for the Degree of Master of Applied Science In The Program of Civil Engineering Toronto, Ontario, Canada, 2013

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Exploratory Study of Date Seed as Coarse Aggregate in ...

The use of DS in concrete production will not only reduce the problem of Agricultural wastes in the societies but will greatly reduce the cost of concrete production. It is in the light of this that this research exploratory studied the suitability of DS when used as coarse aggregate in concrete production. 1.1 Research Hypothesis

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Impact of Workability in Aracaura Columaris (Christmas ...

2019-1-1  compressive strength at 28 days which is suitable in application of concrete production, also from another study, (Et.al [9]) mentioned that at 28 days compressive strength of concrete produced using crushed Doum palm shell as partial replacement in coarse aggregate in concrete

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Use of recycled FRP reinforcing bar in concrete as coarse ...

2016-9-15  The use of FRP bars for reinforcing concrete is increasing in construction. This study investigates the impact of replacing coarse natural aggregate (NA) in concrete with cut FRP bar waste (FRP-RA) on the compressive and tensile strength of both high strength and normal strength concretes.

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(PDF) Recycled aggregates in concrete production ...

recycled concrete aggregate substantially affect the properties and mix design of concrete both at fresh and hardened states since it is known by high porosity due to the adhered layer of old...

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Strength and microstructure of eco-concrete produced

2021-3-8  A study by Olofinnade, Ndambuki, Ede, and Olukanni (2016b) recommended the use of combined fine and coarse Limestone aggregate by up to 25% content in concrete. In addition, Ismail and Al-Hashmi (2009) opined that the observed low strength in Limestone con-crete could be attributed to the weak adhesive bond between Limestone aggregate and the cement paste.

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Comparative study on mechanical properties of

2020-1-1  Replacement of coarse aggregates in the geopolymer concrete with recycled coarse aggregate from demolition sites has the potential to reap financial as well as environmental benefits over conventional concrete with natural coarse aggregates.

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Environmental Impact of Aggregates - Concrete

Environmental Impact of Aggregates. Aggregates form the major part of concrete and are derived from many types of rock. Granite and limestone are extracted from quarries, crushed and graded. In many parts of the UK, land-based or marine sand and gravel are available: these require some processing, such as washing and grading, before use in ...

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Replacement Of Coarse Aggregate In Concrete

2021-8-29  As concrete demand and conumption is increased rapidly demand of natural aggregate also rised. Similarly, the production of natural coarse aggregate is not sufficent ro satisfied these increased demand.Therefore, as a solution and to save enviroment the replacement of coarse aggregate in concrete is become essenetial.. Theare various alternative materials for coarse aggregate such as

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Understanding the Role of Aggregates in Concrete - Bay ...

Cement is necessary, but the strength can still be retained when using well-graded aggregates that cost significantly less. Aggregates make up 60-80% of the volume of concrete and 70-85% of the mass of concrete. Aggregate is also very important for strength, thermal and elastic properties of concrete

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Impact of Workability in Aracaura Columaris (Christmas ...

2019-1-1  compressive strength at 28 days which is suitable in application of concrete production, also from another study, (Et.al [9]) mentioned that at 28 days compressive strength of concrete produced using crushed Doum palm shell as partial replacement in coarse aggregate in concrete

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THE ROLE OF AGGREGATES AND SANDS IN THE

A good concrete aggregate must be clean, chemically inert, and durable and roughly cubic in shape after crushing and of a size grade suitable to make concrete of desired physical qualities. Natural sand consists of loose grains which are commonly the result of the chemical weathering and/or

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The Environmental Impact of Recycled Concrete

2012-8-14  aggregate and the new concrete made with this recycled aggregate needs new cement. Sand, gravel, limestone and other materials many times are extracted from nature on a destructive way. The recycled aggregate production is about 5% of the total aggregates needed to

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EXPERIMENTAL INVESTIGATION FOR RECYCLED COARSE

2016-6-10  Due to the critical shortage of natural aggregate, the availability of demolished concrete for use as recycled concrete aggregate (RCA) is increasing. Using the waste concrete as RCA conserves natural aggregate, reduces the impact on landfills, decreases

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(PDF) Environmental Impact of Concrete - ResearchGate

2009-10-20  The use of concrete represents about 65% of all the building materials in the world [4]. This leads to overproduction of cement that results to environmental issues such as water pollution [5 ...

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Evaluation of the Properties of Lightweight Concrete

In concrete, coarse aggregate takes around 60% of the general self-weight of normal weight concrete ... utilization of alternatives material as aggregate in concrete production; Ramezanianpour et al (2009) and Ndoke (2006) assessed the performance of palm ... determine the aggregate impact value of coarse aggregates using Impact testing machine ...

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Properties of recycled concrete aggregate under

2020-4-10  recycled concrete aggregate in new concrete production appears to be an effective utilization of concrete waste. However, the strength of new concrete produced using recy-cled concrete aggregate needs to be evaluated before their use in structures. Many researchers studied the mechanical behavior of recy-cled concrete coarse aggregates [1–9].

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Environmental Impact of Aggregates - Concrete

Environmental Impact of Aggregates. Aggregates form the major part of concrete and are derived from many types of rock. Granite and limestone are extracted from quarries, crushed and graded. In many parts of the UK, land-based or marine sand and gravel are available: these require some processing, such as washing and grading, before use in ...

Get Price

THE ROLE OF AGGREGATES AND SANDS IN THE

A good concrete aggregate must be clean, chemically inert, and durable and roughly cubic in shape after crushing and of a size grade suitable to make concrete of desired physical qualities. Natural sand consists of loose grains which are commonly the result of the chemical weathering and/or

Get Price

Effect of Sand Fines and Water/Cement Ratio on

2019-10-29  concrete consisting sand with fines content of 2%, 4%, 6%, 8%, 10% and 12% with three constant water/cement ratios of 0.55, 0.60 and 0.70 were prepared for the study. The amounts of coarse aggregate used were kept constant for all batches. The concrete were mixed using 1m3 drum concrete mixer. Workability test: Slump measurement was taken

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Mechanical Properties of Recycled Coarse Aggregate ...

2021-3-1  the production of concrete are mined extensively, ... alternate materials are being looked at, producing concrete that creates a minimum impact on the environment. This paper discusses M25 grade concrete's mechanical properties made with recycled coarse aggregate using mineral admixtures such as fly ash, GGBS, and combination. By utilizing the

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EXPERIMENTAL INVESTIGATION FOR RECYCLED COARSE

2016-6-10  Due to the critical shortage of natural aggregate, the availability of demolished concrete for use as recycled concrete aggregate (RCA) is increasing. Using the waste concrete as RCA conserves natural aggregate, reduces the impact on landfills, decreases

Get Price

Experimental Investigation Of Coarse Aggregate With

2015-6-5  Experimental Investigation Of Coarse Aggregate With Steel Slag In Concrete International organization of Scientific Research 67 P a g e 3.5 Water Casting and curing of specimens were done with the potable water that is available in the college premises.

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Properties of recycled concrete aggregate under

2020-4-10  recycled concrete aggregate in new concrete production appears to be an effective utilization of concrete waste. However, the strength of new concrete produced using recy-cled concrete aggregate needs to be evaluated before their use in structures. Many researchers studied the mechanical behavior of recy-cled concrete coarse aggregates [1–9].

Get Price

Strength and microstructure of eco-concrete produced

2021-3-8  A study by Olofinnade, Ndambuki, Ede, and Olukanni (2016b) recommended the use of combined fine and coarse Limestone aggregate by up to 25% content in concrete. In addition, Ismail and Al-Hashmi (2009) opined that the observed low strength in Limestone con-crete could be attributed to the weak adhesive bond between Limestone aggregate and the cement paste.

Get Price

Experimental Study On Pervious Concrete Using Different ...

2018-5-17  concrete was first used in 1800’s in Europe as a pavement surfacing and load bearing wall. It is made using large aggregate with little to no fines also it’s cost effective way to reduce use of river sand. Pervious concrete contains open cells which help in high permeability due to the porous structure.

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Impact of Workability in Aracaura Columaris (Christmas ...

2019-1-1  compressive strength at 28 days which is suitable in application of concrete production, also from another study, (Et.al [9]) mentioned that at 28 days compressive strength of concrete produced using crushed Doum palm shell as partial replacement in coarse aggregate in concrete

Get Price