### Mechanical properties of recycled aggregate concrete under

May 04, 2020The mechanical properties of recycled aggregate concrete under multiaxial compression were tested by servo-controlled setup (TAWZ-5000/3000). Properties of strength and stress–strain relation were obtained, and the influence factors of stress ratio and recycled coarse aggregate replacement ratio were analyzed.

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applications is rarely reported because of its poorer compressive strength and high variability in mechanical behavior. This paper proposes a new approach in mixing concrete, namely "two-stage mixing approach (TSMA)", intended to improve the compressive strength for recycled aggregate concrete and hence lower its strength variability.

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In order to study the degradation characteristics of recycled aggregate concrete mixed with glazed hollow beads (RATIC), mechanical properties and internal meso-structural changes at high temperatures, the cube compressive strength test and CT test are carried.

Get Price### Prediction and analysis of compressive strength of

Aug 12, 2020This paper aims to predict the 28-day compressive strength of recycled thermal insulation concrete more accurately.,The initial weights and thresholds of BP neural network are improved by genetic algorithm on MATLAB 2014 a platform.,Genetic algorithm–back propagation (GA-BP) neural network is more stable. The generalization performance of the complex is better.,The GA

Get Price### The Design and Development of Recycled Concretes in a

1 The use of coarse recycled aggregate concrete and RMF (recycled mixed fine aggregate) has a beneficial effect on eco-efficiency to split tensile strength (strength/CO 2 emission ratio), whereas the eco-efficiency is slightly lower (3%) than HP in terms of compressive and flexural strength.

Get Price### Probabilistic Conversion of the Compressive Strength of

Jan 16, 2019This paper investigates the effect of recycled coarse aggregate incorporation on the relationship between 150 mm cubic and Փ 150 mm cylindrical compressive strength (the reference strength of standards) by comparing data from recycled and natural aggregate concrete compositions in which both cubes and cylinders were tested.

Get Price### INVESTIGATIONS OF THE STRUCTURAL CHARACTERISTICS OF

ratio values. There is a marginal difference between compressive strength of normal concrete and concrete produced by partial RCA of 15% replacement at 0.4 w/c ratio. Keywords: recycled concrete aggregate, natural aggregate, compressive strength, water/ cement ratio and natural aggregate concrete. 1. INTRODUCTION

Get Price### (PDF) Recycled Concrete Aggregate for Medium

Aug 17, 2021compressive strength of the recycled concrete using a non-destructive test (UPV t est). In In this research, the criterion variable included the compressive strength at 28 days a nd the

Get Price### (PDF) Recycled Concrete Aggregate for Medium

Aug 17, 2021compressive strength of the recycled concrete using a non-destructive test (UPV t est). In In this research, the criterion variable included the compressive strength at 28 days a nd the

Get Price### On statistical characteristics of the compressive strength

Jun 04, 2005This paper presents a statistical analysis of the compressive strength of recycled aggregate concrete (RAC) with recycled coarse aggregate (RCA) coming from one single source. The statistical analysis includes the mean value, the standard deviation and the coefficient of variation in addition to the probabilistic distribution.

Get Price### Performance Assessment of Cold Asphalt Concrete Mixtures

Aug 23, 2021Increasing of recycled aggregate percent in cold asphalt concrete mixtures decreases the asphalt content. Consequently, the recycled aggregate can be used to reduce the asphalt content of paving mixtures. 5. Using of the recycled aggregate in cold asphalt concrete mixtures can improve the Marshall stability as well as shear strength. 6.

Get Price### Effect of Recycled Aggregate on Compressive Strength of

The main aim that testing the recycled aggregate is to find out the result of the strength characteristic on it and analysis whether recycled aggregate is suitable to apply in the construction area. The compressive strength of recycled aggregate concrete was

Get Price### Performance Assessment of Cold Asphalt Concrete Mixtures

Aug 23, 2021Increasing of recycled aggregate percent in cold asphalt concrete mixtures decreases the asphalt content. Consequently, the recycled aggregate can be used to reduce the asphalt content of paving mixtures. 5. Using of the recycled aggregate in cold asphalt concrete mixtures can improve the Marshall stability as well as shear strength. 6.

Get Price### Microstructure analysis of hardened recycled aggregate

Dec 10, 2006Recycled aggregates are formed basically by adhered mortar and original aggregates. Adhered mortar is a very porous material, with a high absorption capacity and high permeability. Four different percentages (0, 25, 50 and ) of wet recycled coarse aggregates were used in the production of the concrete tested, the same compressive strength

Get Price### Compression Size Effect of Recycled Aggregate Concrete

Apr 29, 2021Many previous studies have presented that the compressive strength of recycled concrete mixed with a certain proportion of ﬁne recycled concrete aggregates (FRCAs) is greatly reduced due to the large water absorption rate of FRCAs [27–29]. Additionally, the adverse effect of FRCAs on concrete is greater than that of coarse recycled concrete

Get Price### Vol. 2, Issue 3, March 2013 Recycled Plastics as Coarse

With limited test on bond strength of PCA concrete an admixture was added to the mixing water 0.4% by weight of cement to improve bonding between plastic aggregate and the matrix. The limited test result shows that the compressive strength increased 14% when compared with PCA concrete without admixture. Some tests were also conducted to study

Get Price### EVALUATION OF RECYCLED CONCRETE AGGREGATE

Using recycled concrete aggregate (RCA) in portland cement concrete pavements (PCCP) could prove to be an economical and sustainable way to alleviate our dependence on natural aggregates. RCA is produced from the rubble of demolished pavements and structures. In addition to alleviating our dependence on natural aggregates, recycling these

Get Price### Estimation of compressive strength of high

May 30, 2014In the compressive strength test at a material age of 28 days, the concrete incorporating recycled aggregates show almost the same or slightly lower strength compared with natural aggregate concrete. Using the variables of optimised contact time, the velocity of the compression wave obtained through simulation can be an index to determine non

Get Price### Thermally

In order to study the degradation characteristics of recycled aggregate concrete mixed with glazed hollow beads (RATIC), mechanical properties and internal meso-structural changes at high temperatures, the cube compressive strength test and CT test are carried.

Get Price### Study of the influence of jigging of recycled coarse

Analysis of the results of the axial compression strength tests showed that the variability of the recycled aggregates reflected in the inconstancy of the behavior of the concrete produced with them; it was not possible to perceive a common or uniform performance between the three sources of recycled aggregate for the mix design produced.

Get Price### Effect of fly ash on compressive strength of concrete

Sep 21, 2018Concrete specimens are tested after curing at 28 days. Compressive strength results are then used for multiple linear regression by using SPSS version 22 software to get an empirical formula between the compressive strength and percentage of recycled coarse aggregate, the percentage of fly ash and water-cement ratios.

Get Price### Prediction of Compressive Strength of Recycled Aggregate

How to cite this article: Arif C, Jale T. Prediction of Compressive Strength of Recycled Aggregate Concrete using LASSO. Civil Eng Res J. 2018; 5(1): 555654. DOI: 10.19080/CERJ.2018.05.555654. 0029 Civil ngineering Research ournal ment ratio expressed as a percentage, and concrete maturity be-

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high strength concrete by using different percentage of recycled aggregates. The investigation was carried out using workability test, compressive test, indirect tensile test and modulus of elasticity test. There were total of eight batches of concrete mixes, consists of every 20% increment of recycled aggregate replacement from 0% to .

Get Price### The Design and Development of Recycled Concretes in a

1 The use of coarse recycled aggregate concrete and RMF (recycled mixed fine aggregate) has a beneficial effect on eco-efficiency to split tensile strength (strength/CO 2 emission ratio), whereas the eco-efficiency is slightly lower (3%) than HP in terms of compressive and flexural strength.

Get Price### Influence of fly ash, glass fibers and wastewater on

In this study, mechanical properties such as compressive strength and split tensile strength as well as durability properties i.e., water absorption, chloride penetration, and resistance against H 2 SO 4 of the recycled aggregate concrete incorporating with fly ash and glass fibers (FGRAC) have been studied under different curing ages by

Get Price### EVALUATION OF RECYCLED CONCRETE AGGREGATE

Using recycled concrete aggregate (RCA) in portland cement concrete pavements (PCCP) could prove to be an economical and sustainable way to alleviate our dependence on natural aggregates. RCA is produced from the rubble of demolished pavements and structures. In addition to alleviating our dependence on natural aggregates, recycling these

Get Price### Thermally

In order to study the degradation characteristics of recycled aggregate concrete mixed with glazed hollow beads (RATIC), mechanical properties and internal meso-structural changes at high temperatures, the cube compressive strength test and CT test are carried.

Get Price### View of Study of recycled concrete aggregate quality and

Return to Article Details Study of recycled concrete aggregate quality and its relationship with recycled concrete compressive strength using database analysis Study

Get Price### (PDF) Recycled Concrete Aggregate for Medium

Aug 17, 2021compressive strength of the recycled concrete using a non-destructive test (UPV t est). In In this research, the criterion variable included the compressive strength at 28 days a nd the

Get Price### Influence of Using Recycled Ceramic Aggregate and Ultra

ceramic aggregate combining ultra-fine sand on the compressive strength of concrete. And the experiment was carried on to research the effect of the variation of replacement ratio of recycled ceramic aggregate on compressive strength of recycled ceramic mixed aggregate concrete (RCMC). EXPERIMENTAL PROGRAM Materials.

Get Price### Finite Element Analysis of Axial Compression Behaviour of

and carried out compressive strength test at 7,14,21, 28 days. The 28 days compressive strength of 12 batches of recycled aggregate concrete which they have obtained is 29.42 N/mm2 which were greater than characteristic compressive strength of 25 N/mm2. The experimental and the theoretical studies about the elasticity modulus and

Get Price### Buildings

This work aims to study the influence of using construction and demolition waste in the replacement of coarse and fine aggregate to produce recycled aggregate concrete (RAC). A moderate compressive strength concrete made with usual fine and coarse aggregate was used as a benchmark material. Compressive and split tensile tests were performed using 120 cylindrical concrete specimens with

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