mechanical properties of recycled coarse aggregate concrete journals in ppt

mechanical properties of recycled coarse aggregate concrete journals in ppt

Comparative LCA of concrete with recycled aggregates: a

Results show that the concrete with 25% recycled aggregates is the best solution from an environmental point of view. Furthermore, geopolymer mixtures could be a valid alternative to reduce the phenomenon of “global warming”; however, the production of sodium silicate and sodium hydroxide has a great environmental impact. A possible future implementation of the present study is certainly

The Mechanical Properties of Recycled Coarse Aggregate

Using recycled coarse aggregate (RCA) to replace natural pebbles and using lithium slag (LS) from industrial waste to replace cement in order to improve the mechanical properties of concrete and solve environmental problems. In this study, the effects of different substitution rates of RCA (0, 30%, 50%, and 70%) and different LS contents (0, 10%, 15%, 20%, and 25%) on the mechanical properties

Author: Yongjun Qin, Jiejing Chen, Zhenxing Li, Zhenxing Li, Yabin Zhang

Use of recycled concrete aggregate in concrete: a review

The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for virgin aggregate. In addition, the use of RCA leads to a possible solution to the environmental problem caused by concrete waste and reduces the negative environmental impact of the aggregate

Cited by: 55

Effect of Chemical Enhancing-Technology on the Properties

Strengthening the attached old cement mortar of recycled aggregate (RA) is a common approach to enhance the RA properties. In this study, four representative chemical enhancing-technologies were chosen. Through the analysis of physical properties, mechanical properties, and shape indexes, the changes of performance before and after strengthening were tested, so as to grasp the influence of

Mechanical Properties Of Recycled Aggregates Concrete

Three types of concrete mixtures were tested: concrete made entirely with natural aggregate (NAC) as a control concrete and two types of concrete made with natural fine and recycled coarse aggregate (50% and 100% replacement of coarse recycled aggregate). Ninety-nine specimens were made for the testing of the basic properties of hardened concrete. Load testing of reinforced concrete beams

Influence of Glass Fibers on Mechanical Properties of

Influence of Glass Fibers on Mechanical Properties of Concrete with Recycled Coarse Aggregates. Despite plain cement concrete presenting inferior performance in tension and adverse environmental impacts, it is the most widely used construction material in the world. Consumption of fibers and recycled coarse aggregates (RCA) can add ductility and sustainability to concrete. In this research

PROPERTIES OF RECYCLED AGGREGATE CONCRETE

application of coarse recycled concrete aggregate, as the component materials in the con-crete mixtures, it is possible to produce structural concrete that can be satisfactory and even with high quality, which primarily depends on the characteristics of crushed demolished concrete. Keywords: recycled aggregate concrete, construction and demolition waste, concre-te properties, research. 1

Engineering Properties of Geopolymer Aggregate Concrete

2018-11-11· This paper reports a novel methodology to manufacture geopolymer coarse aggregate (GPA) using low calcium fly ash. The developed methodology is outlined together with a systematic experimental study undertaken to examine a viable manufacturing process for GPA production and the consideration of key mechanical properties and durability characteristics of GPA concrete up to 90

Author: Chamila Gunasekara, Sujeeva Setunge, David W. Law, Nick Willis, Trevor Burt

Mechanical properties of recycled aggregate concrete

2005-06-01· It is shown that some properties of recycled aggregate concrete (RAC) may be generally lower than those of normal concrete (NC), but they are still sufficient for some practical applications in Civil Engineering. The most important mechanical properties of RAC are the compressive strength, the tensile and the flexural strengths, the bond strength and the elastic modulus of such concrete. In

Cited by: 758

Recycled Aggregate Concrete LinkedIn SlideShare

2014-11-15· 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 Crushin g age Bulk specific gravity Bulk density Absorp tion (%) Crushin g value(% ) 1 days Coarse Mediu m

PROPERTIES OF RECYCLED AGGREGATE CONCRETE

application of coarse recycled concrete aggregate, as the component materials in the con-crete mixtures, it is possible to produce structural concrete that can be satisfactory and even with high quality, which primarily depends on the characteristics of crushed demolished concrete. Keywords: recycled aggregate concrete, construction and demolition waste, concre-te properties, research. 1

Effect of recycled coarse aggregate on the properties of

The effect of recycled coarse aggregate (RCA) on the fresh and hardened properties of C40 self-compacting concrete (SCC) was investigated in this paper. The slump, T

An Investigation of Mechanical Properties of Recycled

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Mechanical Properties, Drying Shrinkage and Resistance

It was found that the recycled aggregate concrete decreased the compressive strength at 7 to 28 days as compared with those properties of the control concrete. The decrease in strength can be suppressed low by partial use of recycled coarse aggregate. Drying shrinkage of recycled aggregate concrete showed larger value than conventional crushed aggregate concrete. The use of shrinkage reducing

Microstructural Characterization of Concrete Prepared with

2013-05-15· Several authors have reported the workability, mechanical properties, and durability of concrete produced with construction waste replacing the natural aggregate. However, a systematic microstructural characterization of recycled aggregate concrete has not been reported. This work studies the use of fine recycled aggregate to replace fine natural aggregate in the production of concrete

Influence of Glass Fibers on Mechanical Properties of

Influence of Glass Fibers on Mechanical Properties of Concrete with Recycled Coarse Aggregates. Despite plain cement concrete presenting inferior performance in tension and adverse environmental impacts, it is the most widely used construction material in the world. Consumption of fibers and recycled coarse aggregates (RCA) can add ductility and sustainability to concrete. In this research

EFFECT OF DIFFERENT TYPES OF FIBER UTILIZATION ON

The addition of recycled aggregates in concrete increases shrinkage, porosity and decreases the mechanical properties compared to that of normal concrete. This study was aimed at investigating how the addition of various proportions of polypropylene and steel fiber affect the mechanical properties of recycled aggregate concrete (RAC). The natural coarse aggregates (NCAs) used in the production

Strength and Durability Evaluation of Recycled Aggregate

2015-05-14· Therefore, the experimental program was focused on the evaluation of physical and mechanical properties of the recycled aggregate over a period of 6 months. In addition, concrete properties produced with fine and coarse recycled aggregate were evaluated. Several concrete mixes were prepared with 100 % recycled aggregates and the results were

Recycled Aggregate Concrete LinkedIn SlideShare

2014-11-15· 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 Crushin g age Bulk specific gravity Bulk density Absorp tion (%) Crushin g value(% ) 1 days Coarse Mediu m

Recycle of E-Waste in Concrete

Benefits of recycling are extended when responsible recycling methods are used. Concrete mixes with different percentages of E-waste were casted. It has been decided to make three different types of conventional specimens with partial replacement of E-waste on a percentage of 10%, 20%, and 30% to coarse aggregate with water cement ratio of 0.45. For conventional specimens are also prepared for

Effect of recycled coarse aggregate on the properties of

The effect of recycled coarse aggregate (RCA) on the fresh and hardened properties of C40 self-compacting concrete (SCC) was investigated in this paper. The slump, T

Study of recycled concrete aggregate quality and its

mechanical properties of recycled concrete coarse aggregates studied using the database. The quality of recycled aggregate concrete depends on the properties of the recycled aggre-gates. This paper deals with the study of aggregates recycled from concrete waste, which are the most suitable aggregates for creating structural recycled concrete. Apart from the natural aggregate, the other

Microstructural Characterization of Concrete Prepared with

2013-05-15· Several authors have reported the workability, mechanical properties, and durability of concrete produced with construction waste replacing the natural aggregate. However, a systematic microstructural characterization of recycled aggregate concrete has not been reported. This work studies the use of fine recycled aggregate to replace fine natural aggregate in the production of concrete

EFFECT OF DIFFERENT TYPES OF FIBER UTILIZATION ON

The addition of recycled aggregates in concrete increases shrinkage, porosity and decreases the mechanical properties compared to that of normal concrete. This study was aimed at investigating how the addition of various proportions of polypropylene and steel fiber affect the mechanical properties of recycled aggregate concrete (RAC). The natural coarse aggregates (NCAs) used in the production

Mechanical and fracture properties of recycled aggregate

In this paper the relationships between the mechanical and fracture properties of recycled aggregate concretes (RAC) are investigated based on the own research programs results and an extensive number of experimental data from the literature. The primary aim is the extension of design standards empirical models to the case of RAC with particular emphasis on the effect of replacement ratio on

Mechanical properties of recycled aggregate concrete

Mechanical properties of recycled aggregate concrete produced with Portland Pozzolana Cement Suman Saha* and Rajasekaran Ca Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore-575025, India (Received April 18, 2016, Revised June 15, 2016, Accepted June 23, 2016) Abstract. The quantity of construction and demolition waste has been

Mechanical Properties of Recycled Coarse Aggregate

along with recycled aggregate in concrete. Recycled aggregate replacement up to 50% enhanced the properties of concrete. Weerachart Tangchirapat et.al, [4] studied the influence of fly ash on slump loss and strength of concrete containing 100% recycled aggregates. Both the fine and coarse aggregates were replaced by recycled aggregates. Fly ash

Effect of Recycled Aggregates On Mechanical Properties Of

recycled concrete aggregate as coarse and fine aggregates were evaluated. Two series of RCA concrete aggregates were used. In series I the mixtures were prepared with 0, 20, 30, 40, 50, 60, 70 % Coarse RCA and in series II the mixtures were prepared with 0, 20, 30, 40, 50, 60, 70 % fine RCA. The results indicates, the strength of recycled concrete can be 1025% – lower than that of

Properties Of Concrete Ppt

9 小时前· Physical Properties of Aggregates 4 Coarse Aggregate Angularity • Measured on + 4. Fig 3 Ranges of rheological properties for normal concrete and SCC 10,3. 2Faculty of Science, Engineering and Technology, Swinburne Institute of Technology, Melbourne, Australia. Fire and flood resistant concrete steps do not suffer from the vibrations created by heavy traffic over wooden or metal access

Research Article A Study of Concrete Made with Fine and

A Study of Concrete Made with Fine and Coarse Aggregates Recycled from Fresh Concrete Waste and % by mass of aggregates. Several mechanical properties were tested as compressive and tensile strengths. e results show a good correlation between aggregates replacement percentage and concrete properties.Concerningmechanicalproperties,agradualdecreaseincompressive,splitting,and

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