Structural Behaviour of Composite Members with Recycled

concrete-filled thin-walled steel tube column have similar deformation and failure patterns, and the replacement ratio of recycled coarse aggregate (RCA) has some effect on the load bearing capacity and deformation (see Figure 1). Yang and Ma ( ) experimentally studied the compressive behaviour of stainless RACFST stub

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Influence of Quality and Replacement Rate of Recycled

Compared with natural aggregate, the content of hardening cement in recycled aggregate is larger, which leads that the water absorption of recycled aggregate is larger and its performance such as robustness is poorer. And the engineering field pays much attention to the problem of the recycled fine aggregate which can be used in the durability requirements of recycled concrete or not.

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Recycling of PET bottles as fine aggregate in concrete

The use of coarse recycled concrete aggregates (CRCA) in conjunction with fine recycled concrete aggregates (FRCA) as sub-base materials has been widely studied. Although research results indicate that it is feasible to employ both CRCA and FRCA as granular sub-base, the influence of the unhydrated cement in the adhered mortar of the RCA on the

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PDF Properties of Recycled Aggregate Concrete

properties of recycled aggregate are much more pro-nounced than as is the case with natural aggregates. Figure 2. Appearance of the recycled aggregate grains [2] 2.1. Aggregate grading Grading of recycled coarse aggregate normally satisfies the standards for natural aggrega-te, while in the case of recycled fine aggregate,

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Effect Of Using Basalt And Limestone As Coarse Aggregate

In this study, concrete mixtures were tested to effect of basalt and limestone as coarse aggregate and evaluate their efficiency on fresh and hardened concrete to achieve the design compressive strengths of [25N/mm2]. By using different proportions is 25%, 50%, 75% and100 %from the weight of coarse aggregate.

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PDF Mechanical and Durability Properties of Concrete Produced

an alternative material for natural coarse aggregate. One of the sources for alternative aggregate is recycled concrete aggre-gate (RCA) from construction and demolition wastes.1,2 Construction and demolition waste consists of inert mate-rial such as concrete, plaster, metal, glass, wood, and plastics.

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Recycled concrete as fine and coarse aggregates in

May 25,  · The effects of using crushed concrete as coarse and fine aggregates upon strength and deformation of concrete are reported. The properties of recycled aggregates differ from those of natural aggregates due to the presence of a considerable proportion of mortar attached natural aggregate

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PDF Effect of Recycled Aggregate and Iron Slag in Concrete

dispose. In this work, the effect of iron slag and recycled aggregate in the concrete were studied. The compressive strength of the concrete cubes containing Iron slag(20,40,60,80,100%) and recycled aggregate(25,50,75,100%) as partial replacements of fine aggregate and natural coarse aggregate were studied in

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PDF Use of Recycled Concrete Aggregate in PCCP: Literature Search

Properties and Characteristics of Recycled Concrete Aggregate A concrete pavement's strength and performance is very dependent on the aggregates used to produce the concrete. Recycled concrete aggregates are different in many ways from aggregates as shown in Table 1. Table 1. Comparison of typical aggregate and recycled concrete

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PDF Aggregates for Concrete - Memphis

Recycled concrete, or crushed waste concrete, is a Size numbers (grading sizes) for coarse aggregates apply to the amounts of aggregate (by mass) in percent-ages that pass through an assortment of sieves (Fig. 5-5). The effect of a collection of various sizes in reducing

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Application of Conventionally Recycled Coarse Aggregate to

4. Tests for recycled concrete using coated recycled coarse aggregate 4.1 Types of concrete and mix proportions The types of concretes and mix proportions are listed in Table 5. Two types of recycled coarse aggregate were used, i.e., middle- and low-quality recycled coarse ag-gregate. Three types of surface treatment were applied,

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Fly Ash and Recycled Coarse Aggregate in Concrete: New Era

The strength of recycled coarse aggregate is lower than natural aggregate. The weight of recycled coarse aggregate is lighter than natural aggregate. This is the general effect that will reduce the strength of reinforced concrete. TEXTURE Recycled Coarse Aggregate has the rough – textured, angular and elongated particles

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Effect of Recycled Coarse Aggregate on the Fresh

plastic and gypsum. The concrete which is made with such recycled aggregate is called as recycled aggregate concrete (RAC). Type of Aggregates Description Application Recycled Concrete Aggregate (RCA) Crushed sound and clean waste Concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass.

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PDF Fly Ash and Recycled Coarse Aggregate in Concrete: New Era

The strength of recycled coarse aggregate is lower than natural aggregate. The weight of recycled coarse aggregate is lighter than natural aggregate. This is the general effect that will reduce the strength of reinforced concrete. TEXTURE Recycled Coarse Aggregate has the rough - textured, angular and elongated particles

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PDF Effect of Different Treatment Methods on the Interfacial

Effect of Different Treatment Methods on the Interfacial Transition Zone Microstructure to Coarse Recycled Concrete Aggregate Hanaa Khaleel Alwan Al-Bayati1 Ph.D. Candidate, Centre for Pavement and Transportation Technology (CPATT), Department of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, 200

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PDF Bond Efficiency and Effect of Cover on Bond Strength

recycled coarse and fine aggregates for concrete but in practice are not used for structural purposes although research shows that, structural concrete can be produced using quality controlled recycled aggregates (Lotfy & Al-fayez ) (Rahal 2007). Recently Pedro et al, (Pedro et al. ) demonstrated

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