properties of recycled aggregates to be used in concrete ppt

properties of recycled aggregates to be used in concrete ppt

Recycled Aggregate Concrete - SlideShare

Nov 15, 2014  Classification properties of recycle aggregate concrete Material composition is the basis for classification of recycled concrete aggregate in two main types- 1) Crushed concrete 2) Mixed material Each of these types is divided in a class for bound and a class for unbound use

Recycled aggregate concrete - SlideShare

Nov 16, 2014  Crushed recycled concrete can also be used as the dry aggregate for brand new concrete if it is free of contaminants. Also, concrete pavements can be broken in place and used as a base layer for an asphalt pavement through a process

Recycled aggregate concrete - SlideShare

Nov 15, 2017  REFERENCES [1] Limbachiya M.C., Leelawat T. and Dhir R.K.; Use of recycled concrete aggregate in high-strength concrete, Materials and Structures, Vol. 33, pp. 574-580, 2000. [2] Buyle-Bodin F. and Hadijieva-Zaharieva R.; Influence of industrially produced recycled aggregates on flow properties of concrete, Materials

Recycled concrete aggregate - slideshare

Mar 14, 2015  The use of recycled concrete aggregate is proved to be a valuable, buildings materials in technical, environmental economical respects. Recycle reuse is an appropriate solution to problems of dumping hundred of thousands of tons of demolition wastes.

Recycled Concrete Aggregate - PowerPoint Presentation ...

Files > Download Recycled Concrete Aggregate - PowerPoint Presentation - CivilEngineeringBible (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.

(PPT) CIVIL PROJECT PPT RECYCLED AGGREGATE CONCRETE ...

RCA is feasible in concrete pavements, if performance comparable to virgin materials can be expected J-4.USE OF RECYCLED AGGREGATE CONCRETE AUTHORS: OBJECTIVE: CONCLUSION: Mr. Tushar R 1. To find out the % use 1.Use of recycled aggregate up to feasible for construction.

PROPERTIES OF RECYCLED AGGREGATE CONCRETE

According to the Japanese standard for the use of recycled aggregate as a component of concrete, there is a limit so that a coarse fraction of recycled aggre-gate whose absorption is not higher than 7%, and fine fractions whose absorption goes up to 13% [8], i.e. 10% can be used for the production of concrete.

Aggregates of Concrete - SlideShare

Aggregates of Concrete 1. AggregatesAggregates Water for ConcreteWater for Concrete 2. AggregatesAggregates • Aggregates generally occupy 65- 80% of a concrete’sAggregates generally occupy 65- 80% of a concrete’s volume.volume. Aggregates are inert fillers floating in theAggregates are inert fillers floating in the cement paste matrix ...

Concrete- types, testing properties - SlideShare

Sometimes such a concrete is referred to as no-fines concrete. Suitable aggregates are — natural aggregate, blast furnace slag, clinker, foamed slag, etc. Since fine aggregates are not used, voids will be created and the concrete produced will be light weight. • By replacing coarse aggregate by porous or cellular aggregate. The concrete ...

Aggregates for Concrete - Memphis

Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3⁄ 8 in. and 11⁄ 2 in.). Some natural aggregate deposits, called pit-run gravel, consist of gravel and sand that can be readily used in concrete after minimal processing. Natural ...

Properties of Concrete - Memphis

Concrete Material Properties For concretes up to about 6,000 psi it can be approximated as: Ewf 33 15. ' where w is the unit weight (pcf), f’c is the cylinder strength (psi). c Concrete Material Properties The weight density of reinforced concrete using normal aggregates is about 150 lb/ft3 (pcf). If 5 pcf of this is allowed for the steel and ...

3 Aggregate Properties - IN.gov

Some aggregates have minerals that are subject to oxidation, hydration, and carbonation. These properties are not particularly harmful, except when the aggregates are used in portland cement concrete. As might be expected, iron sulfides, ferric and ferrous oxides, free

Use of RECYCLED AGGREGATES In CONCRETE- A Paradigm Shift

The properties of recycled aggregate concrete obtained by various authors are given in Table2. International Status. 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. ...

WHAT ARE THE PROPERTIES OF AGGREGATES FOR CONCRETE ...

Oct 01, 2016  For the preparation of economical concrete mix on should use largest coarse aggregates feasible for the structure. IS-456 suggests following recommendation to decide the maximum size of coarse aggregate to be used in P.C.C R.C.C mix. Maximum size of aggregate should be less than. One-fourth of the minimum dimension of the concrete member.

Recycled Plastics as Coarse Aggregate for Structural Concrete

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 [10].

Aggregates - Portland Cement Association

Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, or large-size gravel. Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases, soil-cement, and in new concrete. After harvesting, aggregate is processed: crushed, screened, and washed to obtain proper cleanliness and gradation.

(PDF) Use of Recycled Plastics in Concrete: A Critical Review

Furthermore, the morphology of concrete containing plastic materials is described in this paper to explain the influence of plastic aggregates and plastic fibers on the properties of concrete.

7 Lab Tests on Aggregates to Make Better Concrete for ...

In this article we explore the importance of aggregate testing, various tests on aggregates and all the important properties of aggregates. Aggregate is one of the primary building materials and constituent of concrete. Aggregates are used in construction and include sand, gravel, crushed stone, slag, recycled concrete etc.

Crushed Concrete Aggregates - Properties and Uses of ...

Influence of Recycled Aggregate on Concrete Properties 1. Concrete Strength Reductions By and large, strength of concrete produced from crushed concrete aggregate is lower than concrete made using natural aggregate. Strength reduction of concrete produced from recycled coarse aggregate and natural fine aggregate ranges from 5 to 24%.

Concrete Containing Recycled Concrete Aggregate with ...

Jan 01, 2017  After crushing and sorting, such recycled concrete aggregate (RCA) can be used for production of new concrete. The use of RCA may help to save natural aggregate sources and thus contributes to environmental protection. The most negative properties of such aggregate, comparing the natural one are roughness of its surface and high water ...

Green Concrete from Sustainable Recycled Coarse Aggregates ...

Present investigations deal with the development of green concrete (M 30 grade) using recycled coarse aggregates for sustainable development. Characterization of recycled coarse aggregates showed that physical and mechanical properties are of inferior quality and improvement in properties was observed after washing due to removal of old weak mortar adhered on its surface.

(PDF) Use of selected waste materials in concrete mixes

Recycled concrete aggregates, oil palm shell, and expanded polystyrene resulted in the increased workability whereas, the addition of ceramic waste and steel slag as coarse aggregates reduced the ...

Properties of Concrete - Memphis

Concrete Material Properties For concretes up to about 6,000 psi it can be approximated as: Ewf 33 15. ' where w is the unit weight (pcf), f’c is the cylinder strength (psi). c Concrete Material Properties The weight density of reinforced concrete using normal aggregates is about 150 lb/ft3 (pcf). If 5 pcf of this is allowed for the steel and ...

3 Aggregate Properties - IN.gov

Some aggregates have minerals that are subject to oxidation, hydration, and carbonation. These properties are not particularly harmful, except when the aggregates are used in portland cement concrete. As might be expected, iron sulfides, ferric and ferrous oxides, free

Aggregates - Portland Cement Association

Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, or large-size gravel. Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases, soil-cement, and in new concrete. After harvesting, aggregate is processed: crushed, screened, and washed to obtain proper cleanliness and gradation.

Use of waste rubber tyres as aggregate in concrete

cut into pieces with maximum size of 20 mm to use as coarse aggregate, and crumb rubber tyres used as fine aggregate. The replacement of the rubber tyres aggregates in concrete was done in three phases. In the first phase, fine rubber tyres aggregates were used to replace 50% of the normal sand.

(PDF) Use of selected waste materials in concrete mixes

Recycled concrete aggregates, oil palm shell, and expanded polystyrene resulted in the increased workability whereas, the addition of ceramic waste and steel slag as coarse aggregates reduced the ...

(PDF) Use of Recycled Plastics in Concrete: A Critical Review

Furthermore, the morphology of concrete containing plastic materials is described in this paper to explain the influence of plastic aggregates and plastic fibers on the properties of concrete.

Green Concrete: By-Products Utilization and Advanced ...

replace the components of the ordinary concrete for waste or recycled materials. In fact, the idea of green concrete has been extended to not only waste materials, but also to nano-engineered materials that can enhance concrete’s mechanical properties, and, as a result, its life-cycle sustainability.

(PDF) Introduction to Concrete Technology

The use of concrete in structures consumes millions of tons of aggregates. Since earth is the source of the aggregates (either natural or crushed), then obtaining these amounts would have an ...

7 Lab Tests on Aggregates to Make Better Concrete for ...

In this article we explore the importance of aggregate testing, various tests on aggregates and all the important properties of aggregates. Aggregate is one of the primary building materials and constituent of concrete. Aggregates are used in construction and include sand, gravel, crushed stone, slag, recycled concrete etc.

(PDF) Color pigments in concrete and their properties

The resulting properties of colored concrete depend on the used color pigment and thus on the composition of the pigm ent, from compliance with dosage a nd technological process of production.

SEPTEMBER 2011 TECHNICAL NOTE Use of Recycled

Use of Recycled Materials for . Road Construction. TECHNICAL NOTE . 107. Recycled concrete, basalt spalls, asphalt, glass and brick, processed to meet specification requirements, provide suitable materials for roadworks applications, and also for path and drainage construction, saving on use of natural materials. INTRODUCTION

Recycled Aggregate - an overview ScienceDirect Topics

Said Kenai, in Waste and Supplementary Cementitious Materials in Concrete, 2018. Abstract. Construction industry generates huge amounts of debris that needs to be recycled and reused as recycled aggregates (RAs) for partial or total substitution of natural aggregates. Recycling reduces waste and reduces energy consumption and hence contributes to a more sustainable construction

Use of selected waste materials in concrete mixes ...

Jan 01, 2007  This showed that the used recycled aggregates have a similar particle size distribution as that specified for natural aggregates. The mix proportions and the fresh concrete properties, slump and unit weight results are shown in Table 4. Table 4. Mix proportions and fresh crushed concrete–concrete properties.

Recycled Concrete as Aggregate for Structural Concrete ...

The results of recycled concrete aggregate testing are shown in Table 2 and grading curves in Figure 5. Properties of natural and recycled concrete aggregate were tested according to Serbian standards for natural aggregates and quality requirements given in Tables 1 and 2 are also according to Serbian