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bond of recycled coarse aggregate concrete model

bond of recycled coarse aggregate concrete model

Bond of recycled coarse aggregate concrete: Model ...

2021-7-15  The partial factor for recycled aggregate concrete design would be smaller if the mechanical reasons for recycled aggregates influencing the model uncertainty were offset by the resistance model. However, bond models are semi empirical and do not include the tensile strength of concrete, or any parameter related to aggregate strength (e.g. a ...

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Bond of recycled coarse aggregate concrete: Model ...

A stochastic model for this model uncertainty is developed from a meta-analysis. The model uncertainty, estimated from analogue specimens made with either natural aggregate concrete or recycled aggregate concrete, is compared and the incorporation of recycled aggregates was indeed found to have a detrimental influence on the model uncertainty.

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Bond of recycled coarse aggregate concrete: Model ...

A descriptive bond strength equation has been proposed for recycled aggregate concrete and it is noted that the ACI Committee 408R-03 model (for conventional concrete) gave

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An overview of bond behavior of recycled coarse

2021-1-1  Abstract. In this paper, an overview focusing on the bond behavior of recycled coarse aggregate concrete (RAC) with steel bar is carried out. The results show that the failure modes of RAC specimen were not only influenced by a single factor, it is necessary to comprehensively consider the influence of various factors on the failure modes of RAC specimen; The steel bar

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Bond behavior between recycled coarse aggregate

2019-11-30  Bond behavior between recycled coarse aggregate concrete and steel bar after salt-frost cycles. Author links open overlay panel Tian Su a Jin Wu a Guixin Yang b Zhenghao Zou a c. Show more. ... The prediction model of the bond-slip between the RAC and steel bar after salt-frost cycles was established. ...

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Bond of Reinforcement in Concrete Incorporating Recycled ...

The results showed that bond strength of RCA concrete was reduced by up to 21% in comparison to NA concrete, and that there was a strong correlation between bond strength and coarse aggregate crushing strength. A regression model was developed to relate bond strength to coarse aggregate strength, concrete compressive strength, and the bonded ...

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Bond Behavior of Recycled Concrete: Analysis and ...

This paper studies the bond stress–slip curve of recycled concretes and the influence of recycled coarse aggregate, which leads to the determination of bond behavior at serviceability. In order to perform this analysis, a study of the compressive strength of the recycled aggregate concretes is required, due to the relationship between the ...

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Bond strength and prediction model for deformed bar ...

2020-12-30  Bond behavior of steel bar embedded in recycled coarse aggregate concrete under lateral compression load Constr. Build. Mater. , 150 ( 2017 ) , pp. 529 - 537 , 10.1016/j.conbuildmat.2017.05.060

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Evaluation of Recycled Concrete Aggregate Performance in ...

The strength of coarse aggregate as quantified by the aggregate crushing value (ACV) was found to be the most significant aggregate property for influencing bond strength. A regression model (based on the beam-end specimens test results) was developed to extrapolate the experimental development lengths as a function of f’c1/4 and ACV.

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Experimental study and finite element modeling of bond ...

2019-12-15  The purpose of this paper is to study the bond behavior of steel reinforced recycled aggregate concrete (SRRAC) structure, and to solve the problem that the bond behavior cannot be correctly and accurately considered in finite element analysis (FEA) due to the difficulty in modeling the interface.

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Bond of Reinforcement in Concrete Incorporating Recycled ...

The results showed that bond strength of RCA concrete was reduced by up to 21% in comparison to NA concrete, and that there was a strong correlation between bond strength and coarse aggregate crushing strength. A regression model was developed to relate bond strength to coarse aggregate strength, concrete compressive strength, and the bonded ...

get price

Bond performance of recycled aggregate concrete

2020-7-13  replacing coarse natural aggregates for recycled concrete aggregates (RCA) on the bond strength between deformed mild reinforcing steel and surrounding concrete. Two different RCA replacement levels were considered, 50% and 100%, and were compared to a standard Missouri Department of Transportation (MoDOT) mix design. All RCAs

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Bond Behavior of Recycled Concrete: Analysis and ...

This paper studies the bond stress–slip curve of recycled concretes and the influence of recycled coarse aggregate, which leads to the determination of bond behavior at serviceability. In order to perform this analysis, a study of the compressive strength of the recycled aggregate concretes is required, due to the relationship between the ...

get price

An overview of bond behavior of recycled coarse

In this paper, an overview focusing on the bond behavior of recycled coarse aggregate concrete (RAC) with steel bar is carried out. The results show that the failure modes of RAC specimen were not only influenced by a single factor, it is necessary to comprehensively consider the influence of various factors on the failure modes of RAC specimen; The steel bar diameter, the

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Bond behavior between steel reinforcement and recycled ...

2013-4-3  In this paper the bond behavior of recycled aggregate concrete was characterized by replacing different percentages of natural coarse aggregate with recycled coarse aggregate (20, 50 and 100 %). The results made it possible to establish the differences between the conventional concrete bond strength and the recycled concrete bond strength depending on the

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Evaluation of Recycled Concrete Aggregate Performance in ...

The strength of coarse aggregate as quantified by the aggregate crushing value (ACV) was found to be the most significant aggregate property for influencing bond strength. A regression model (based on the beam-end specimens test results) was developed to extrapolate the experimental development lengths as a function of f’c1/4 and ACV.

get price

Prediction of recycled coarse aggregate concrete ...

Purpose. Recycling construction waste is a promising way towards sustainable development in construction. Recycled aggregate (RA) is obtained from demolished concrete structures, laboratory crushed concrete, concrete waste at a ready mix concrete plant and the concrete made from RA is known as RA concrete.

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Properties of coarse aggregate. Download Table

The model uncertainty, estimated from analogue specimens made with either natural aggregate concrete or recycled aggregate concrete, is compared and the incorporation of recycled aggregates was ...

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Mechanical Properties of Recycled Aggregate Concretes ...

In this study, the impact of steel fibres and Silica Fume (SF) on the mechanical properties of recycled aggregate concretes made of two different types of Recycled Coarse Aggregates (RCA) sourced from both low- and high-strength concretes were evaluated through conducting 60 compressive strength tests. The RCAs were used as replacement levels of 50% and 100% of

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Micromechanics-Based Prediction Models and

2021-10-10  Elastic modulus is one of the most important mechanical properties of concrete (including recycled aggregate concrete), and it has a notable guiding significance for engineering. There is a lack of micromechanical research on the elastic modulus of recycled aggregate concrete. This paper adopts four models based on micromechanics, including the Voigt model,

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An overview of bond behavior of recycled coarse

In this paper, an overview focusing on the bond behavior of recycled coarse aggregate concrete (RAC) with steel bar is carried out. The results show that the failure modes of RAC specimen were not only influenced by a single factor, it is necessary to comprehensively consider the influence of various factors on the failure modes of RAC specimen; The steel bar diameter, the

get price

Bond performance of recycled aggregate concrete

2020-7-13  replacing coarse natural aggregates for recycled concrete aggregates (RCA) on the bond strength between deformed mild reinforcing steel and surrounding concrete. Two different RCA replacement levels were considered, 50% and 100%, and were compared to a standard Missouri Department of Transportation (MoDOT) mix design. All RCAs

get price

An overview of bond behavior of recycled coarse

2021-1-1  In this paper, an overview focusing on the bond behavior of recycled coarse aggregate concrete (RAC) with steel bar is carried out. The results show that the failure modes of RAC specimen were not only influenced by a single factor, it is necessary to ...

get price

Study of Bond Properties of Steel Rebars with Recycled ...

2019-3-29  The results of analytical analysis of interfacial bond stress-slip behavior of steel bars embedded in recycled aggregate concrete (RAC) are reported in this paper. Significantly large data from the laboratory pullout tests of specimens were analyzed including the specimens tested by the author. A bond stress-slip constitutive law is proposed for the steel rebars embedded in

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Reliability of the bond strength of recycled coarse ...

2021-11-21  The model’s uncertainty of the Level I provision of the anchorage length of fib Bulletin 72 on ribbed steel/recycled aggregate concrete bond is quantified. Afterwards, reliability analyses on the bond strength are made and a partial safety factor for the anchorage length of recycled concrete elements is proposed.

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Bond behavior of H-shaped steel embedded in recycled ...

2016-6-30  Twenty two push-out tests were carried out in order to investigate the bond behavior between H-shaped steel and recycled aggregate concrete (RAC). Eleven kinds of recycled coarse aggregate (RCA) replacement ratios (i.e., 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100%) were designed in the test, and considering different categories of bond position of H-shaped steel,

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Prediction of recycled coarse aggregate concrete ...

Purpose. Recycling construction waste is a promising way towards sustainable development in construction. Recycled aggregate (RA) is obtained from demolished concrete structures, laboratory crushed concrete, concrete waste at a ready mix concrete plant and the concrete made from RA is known as RA concrete.

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(PDF) Theoretical and experimental investigation on bond ...

The model uncertainty, estimated from analogue specimens made with either natural aggregate concrete or recycled aggregate concrete, is compared and the incorporation of recycled aggregates was ...

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Recycled Concrete Aggregates: A Review International ...

2013-3-29  After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1).This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the mortar is

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Stress–Strain Relationship Model of Recycled Concrete ...

The use of recycled coarse aggregate (RCA) can reduce the consumption of natural coarse aggregate (NCA) and preserve the natural environment. The accurate calculation of the compressive stress-strain relationship of recycled aggregate concrete (RAC) is very important in designing the recycled concrete structure.

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