PERMEABILITY PROPERTIES OF FINE RECYCLED

In this paper, the permeability properties of fine recycled aggregate concrete are presented. The FRA used come from demolished concrete of known properties. Mixes with 10%, 30%, 50% and 100% by volume replacement of fine natural aggregates (FNA) with FRA were produced and tested for water

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Artificial Intelligence to Investigate Properties of

American Concrete Institute ACI Materials Journal January, 2019. Artificial Intelligence to Investigate Properties of Concrete Mixtures Incorporating Recycled Aggregate Concrete. by

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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.

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PROPERTIES OF RECYCLED AGGREGATE CONCRETE

Dec 15,  · [6] D. Jevtić, D. Zakić, A. Savić, Specific properties of recycled aggregate concrete production technology [In Serbian: Specifičnosti tehnologije spravljanja betona na bazi recikliranog agregata], Materijali i konstrukcije, Vol. 52−1 ( ) 52−62.

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Effect of Recycled Aggregate with Glass Fiber on Concrete

Effect of Recycled Aggregate with Glass Fiber on Concrete Properties S. R. Rabadiya S. R. Vaniya D.I.E.T. – Rajkot D.I.E.T. – Rajkot Abstract Concrete made from glass fiber and recycled coarse aggregate as partial replacement of coarse aggregate will be studied for workability, compressive strength, tensile strength, and modulus of elasticity.

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PDF) Mechanical properties of recycled aggregate concrete

Azzawi ( ) tested recycle aggregate concrete made from crushed tile and concluded that the tensile strength, compressive strength and elastic modulus are affected with the use of recycled

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Investigations on Concrete with Recycled Concrete as

properties of control concrete (concrete made with natural aggregate) and the properties of concrete made with different contents of recycled aggregate. Six concrete types were tested within the research program. The type and quantity of coarse aggregate were varied in the following way: - • The first concrete mix had 100% of natural

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PDF Influence of Treatment Methods on Recycled Aggregate

on fresh and hardened properties of concrete made with natural aggregates and recycled coarse aggregates, hence in the present work an attempt is made for sustainable development. Index terms-Construction and demolition waste, Recycled coarse aggregates, Recycled aggregate concrete, treatment methods, harden properties of concrete.

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PDF Sustainable Construction: Use of Recycled Concrete Aggregate

Workability and Compressive Strength Properties of Concrete Containing 287 Recycled Concrete Aggregates Montgomery, D. G. Recycled Aggregate Used for Making Building Blocks 297 Pimienta, P., Iran, T., Delmotte, P. and Colombard-Prout, M. Verification of the Dimensioning Values for Concrete with Recycled 309 Concrete Aggregate Roos, F.

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The equivalent mortar volume method in the manufacturing

Many studies have observed that the mechanical properties of concrete made of recycled aggregate are worse than for concrete made of natural aggregate; this is mainly due to the mortar that is attached to the recycled aggregate. In literature, an equivalent mortar volume method in the manufacturing of recycled aggregate concrete has been proposed.

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Mechanical and Durability Properties of Concrete Produced

study mechanical and durability properties of concrete. In this method, recycled aggregate was heated to a temperature of 250°C (482°F) and then the aggregates were dry-mixed in a pan mixture to remove the attached mortar. This method removed 70 to 80% of attached mortar of the RCA. Concrete mixtures were prepared by using 50% and 100% RCA and

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Improving the Durability Properties of Self-Consolidating

The paper evaluates the durability properties of Self-Consolidating Concrete (SCC) containing fine and coarse recycled concrete aggregates. The SCC mixtures were made with 0%, 25%, 50%, 75% and 100% substitution of Fine Natural Aggregates (FNA) with Fine Recycled Concrete Aggregates (FRCA) whereas Coarse Natural aggregates (CNA) were partially substituted (50%) with Coarse Recycled Concrete

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The influence of recycled concrete aggregate on the

The waste concrete from laboratory test cubes was crushed to produce the Recycled Coarse Aggregate used in recycled concrete. A comparative between the experimental results of the properties for fresh and hardened concrete is presented in the paper. Recycled aggregate concrete (RCA) had a satisfactory performance despite the replacement ratios.

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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.

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Mechanical properties of ready-mixed concrete

Experimental research was conducted to investigate the replacement ratio and water absorption of fine recycled aggregate (FRA) on the fresh and hardened properties of recycled aggregate concrete (RAC).

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PDF Investigation of Properties of Concrete Produced with

abrasion resistance) of recycled aggregate. It is seen that the mechanical and durability conduct of recycled aggregate concrete is optional to that of standard concrete yet with the utilizing various admixture and unique blending approach, required properties can be accomplished.

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PDF Environmental Suitability of Recycled Concrete Aggregates

Two conventional graded aggregate base (GAB) materials and two recycled concrete aggregate materials were used in the current study. GAB materials contain coarse and fine aggregate particles as well as fines (clay and silt). Generally, the ratio between coarse and fine aggregate particles varies between 1:1 and 7:3.

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Application of low grade recycled aggregates for non

conventional concrete, concrete made with 50% of recycled aggregate and concrete made with 100% of recycled aggregate were approximately 0.67, 0.81 and 0.90, respectively. All the concretes were made maintaining the same production process as previous tests (González & Etxeberria ). Table 4. Mix proportions of produced concretes.

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Strength Properties of Concrete Made from Recycled Brick

Concrete of three different target strength, i.e. 17.23, 20.68 and 24.13 MPa was prepared using recycled brick concrete (RBC) and electric arc furnace slag (EAFS) blended as coarse aggregate. EAFS ratio was kept at 0%, 25% and 75% with respect to RBC. Concrete cylinder (200mmX100mm) specimens were prepared following standard procedure.

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Use Of Recycled Aggregate In Concrete

properties of recycled fine aggregate and recycled coarse aggregate & also compares these properties with natural aggregates. Basic changes in all aggregate properties are determined and their effects on concreting work are discussed at length. Similarly the properties of recycled aggregate concrete are also determined. Basic

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Performance and Properties of Structural Concrete Made

PERFORMANCE AND PROPERTIES OF STRUCTURAL CONCRETE MADE WITH RECYCLED CONCRETE AGGREGATE. Prior studies on recycled concrete aggregate (RCA) have largely been limited to the manufacture of nonstructural-grade concrete of up to 32 MPa strength, due to undesirable physical properties of RCA.

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PROPERTIES OF CONCRETE MADE WITH NORTH CAROLINA RECYCLED

The effects on the plastic and hardened properties of recycled aggregate concrete consisting of 60% or 100% recycled coarse aggregate (RCA) and 0%, 25%, 50%, 75%, or 100% recycled fine aggregate (RFA) were investigated. The objectives of the study were: (i) To determine the physical properties of North Carolina recycled aggregates.

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Research on Self-Compacting Concrete Made with Recycled

It is studied the effect of binder quantity, water binder ratio on properties of self-compacting concrete made with recycled coarse aggregates. It can be prepared C50 self-compacting concrete made with recycled coarse aggregate by adjusting send proportion, binder quantity, and mixing mineral additive. For example, when the binder quantity is 600 kg/m3, water binder ratio is 0.28, the flexural

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PDF A Study on the Properties of Recycled Aggregate Concrete

applied sciences Article A Study on the Properties of Recycled Aggregate Concrete and Its Production Facilities Jung-Ho Kim 1,* , Jong-Hyun Sung 1, Chan-Soo Jeon 2, Sae-Hyun Lee 2 and Han-Soo Kim 3 1 Technology Research Center, Hallaencom, 1170-5, Poseunghyangnamro, Hwaseong-si, Gyeonggi-do 18572, Korea; [email protected]

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Development and statistical database analysis of hardened

The use of recycled concrete aggregates (RCA) as a replacement in new concrete has gained popularity worldwide as a method of reducing natural aggregate consumption. Many engineers, owners, and agencies are reticent to use RCA due to a lack of understanding on how the material will impact overall concrete properties.

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Investigation of Properties of Concrete Produced with

abrasion resistance) of recycled aggregate. It is seen that the mechanical and durability conduct of recycled aggregate concrete is optional to that of standard concrete yet with the utilizing various admixture and unique blending approach, required properties can be accomplished.

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PDF The Environmental Impact of Recycled Concrete

4. Characteristics of recycled concrete aggregate The international literature provided numerous works at recycled concrete aggregate area, mainly from the beginning of 1980 (Hansen, 1992). The topics most investigated are durability and mechanical characteristics. The quality of aggregates made of recycled concrete affects directly the

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PDF An Investigation of Mechanical Properties of Recycled

The C25 concrete used in the experiment was a mixture of ordinary Portland concrete (strength grade = p.o42.5), clean river sand (fineness modulus = 2.72), continuous-grade coarse aggregate (particle diameter = 5mm to 25mm) and water.Recycled coarse aggregate is made of waste road concrete. Fig. 1 shows the waste road concrete collection site.

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PDF) Properties of concrete made with crushed concrete as

Tests on the aggregates showed that the recycled concrete aggregates have lower specific gravity and higher absorption capacity than the original crushed granite aggregate. The resistance to

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Properties of recycled aggregate concrete made with

This paper presents the experimental results of a study on comparing the difference in properties of recycled aggregates (RAs) with varying amounts of old adhered mortar obtained from different sources and evaluating the influence of the different RAs on the mechanical and durability properties of recycled aggregate concrete (RAC).

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Aggregate in Concrete - The Concrete Network

Recycled concrete will have a higher absorption and lower specific gravity than conventional aggregates. To produce good quality, durable concrete containing a portion of recycled concrete aggregate often requires trial concrete mixes and close monitoring of the properties of the old recycled concrete, with mix adjustments made, as needed.

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