Recycled aggregate concrete (RAC), due to its high porosity and the residual cement and mortar on its surface, exhibits weaker strength than common concrete. To guarantee the safe use of RAC, a compressive strength prediction model based on artificial ...

MoreRecycled aggregate concrete (RAC), due to its high porosity and the residual cement and mortar on its surface, exhibits weaker strength than common concrete. To guarantee the safe use of RAC, a compressive strength prediction model based on artificial neural network (ANN) was built in

MoreApr 25, 2014 Total four concrete mix batches were tested in which one mix was of normal aggregate concrete at 0% replaced by RCA and other are of Recycled aggregate concrete at 20%, 40% and 60% replaced by RCA. The result of the test are shown in the table 1.The compressive strength of the specimens was calculated by following formula.

MoreMar 01, 2021 Most studies have focused on the properties of recycled aggregate concrete (RAC) , , , , while no extensive studies have been carried out on the prediction of the compressive strength of RAC. The variability in compressive strength of RAC is a main

MoreMar 01, 2013 The ANN model, run in a Matlab platform, was used to predict the compressive strength of the recycled aggregate concrete. The results show that ANN has good potential to be used as a tool for predicting the compressive strength of recycled aggregate concrete prepared with varying types and sources of recycled aggregates.

MoreApr 25, 2014 Total four concrete mix batches were tested in which one mix was of normal aggregate concrete at 0% replaced by RCA and other are of Recycled aggregate concrete at 20%, 40% and 60% replaced by RCA. The result of the test are shown in the table 1.The compressive strength of the specimens was calculated by following formula.

MoreStudy of recycled concrete aggregate quality and its relationship with recycled concrete compressive strength using database analysis • 3. Materiales de Construcción 66 (323), July–September 2016, e089.

MoreCompressive strength is the basic mechanical properties and one of the indicators to determine the performance of a concrete. In this paper, the effects of various percentages (0%, 25%, 50%, 75% ...

MoreRecycled aggregate concrete (RAC), due to its high porosity and the residual cement and mortar on its surface, exhibits weaker strength than common concrete. To guarantee the safe use of RAC, a compressive strength prediction model based on artificial neural network (ANN) was built in this paper, which can be applied to predict the RAC compressive strength for 28 days. A data set containing 88 ...

MoreJan 01, 2021 So in this study analyse the strength of concrete mixes, at the w/c ratio and mix proportion (i.e. M-30 and M-20) were kept constant at different proportion of RA. Compressive strength (CS) of Recycled Aggregate Concrete (RAC) determined at the age of 3, 7, 14 and 28 days and the flexural strength (FS) conducted at 7 and 28 days.

MoreAnalysis of the Impact on Axial Compression and Diametric tensile strength of concrete using recycled fine aggregate - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Due to the current environmental crisis and the improper disposal of construction and demolition waste (CDW), the incorporation of these as aggregates in the manufacture of concrete is presented as one ...

Moreaggregate concrete ,the slump test was about 1.0cm slump for 60 % coarse recycled aggregate concrete and increases as the percent of recycled aggregate decreases . The compressive strength of recycled aggregate concrete with 60 % recycled aggregate, is about 76 % of natural aggregate concrete. The compressive strength increases as the

MoreMay 14, 2015 This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

MoreNational Institute of Technology Rourkela strength of the concrete, resulting in lower concrete strength. Odisha,769008, India [email protected] account the results of a study to evaluate whether or not the compressive strength of concrete made with different types and sources of recycled aggregates can be predicted by regression analysis.

MoreJan 20, 2016 Research on this subject started with basic observations on the effects of using recycled concrete aggregates (RCA) on the compressive strength of concrete (Buck, 1973, Frondistou-Yannas, 1977), as well as its economic feasibility (Frondistou-Yannas and Itoh, 1977). Since then, research on recycled aggregate concrete (RAC) has become ...

MoreJul 05, 2021 1. Introduction. Recycled aggregate concrete (RAC) is a type of green material by replacing the natural aggregate (NA) with the recycled aggregate (RA) in the mix proportion design of concrete , .It is widely recognized that the RAC has a poor mechanical performance due to some inherent defects of the RA, including the higher porosity, higher crushing index and lower apparent

MoreThis 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.

MoreReinforced Concrete Design. 1 hours ago Faculty-legacy.arch.tamu More results . Reinforced Concrete Beam Members Ultimate Strength Design for Beams The ultimate strength design method is similar to LRFD. There is a nominal strength that is reduced by a factor which must exceed the factored design stress.For beams, the concrete only works in compression over a rectangular “stress” block ...

MoreDue to the greater absorption capacity of the recycled aggregate, concretes that have higher contents of this aggregate could still present a lower water-cement ratio in the cement paste around the grain, which contributes to the increase in paste-aggregate adhesion strength and, consequently, the compressive strength of the concrete.

MoreCompressive strength and capillary water absorption tests were made after heating, and the experiments showed higher residual strength in concretes with the greatest content of recycled aggregates. However, a statistical analysis made with additional data available in the literature seemed to predict otherwise, and the recycled aggregate ...

MoreA total of 27 concrete mixtures with three replicates were considered by varying the levels of key factors affecting compressive strength of concrete, namely, w/c ratio, recycled coarse /natural coarse aggregate ratio, and recycled fine/ natural fine aggregate ratio .The experimental data were utilized to carry out analysis of variance (ANOVA ...

MoreCompressive strength of mortar and concrete which used RCA gradually decreased as the amount of the recycled materials increased. Regardless of curing conditions and fly ash addition, the 28 days strength of the recycled aggregate concrete was greater than the design strength, 40 MPa, with a complete replacement of coarse aggregate and a ...

MoreRecycled aggregate concrete (RAC), due to its high porosity and the residual cement and mortar on its surface, exhibits weaker strength than common concrete. To guarantee the safe use of RAC, a compressive strength prediction model based on artificial neural network (ANN) was built in this paper, which can be applied to predict the RAC compressive strength for 28 days. A data set containing 88 ...

MoreRequest PDF Prediction of compressive strength of recycled aggregate concrete based on gray correlation analysis Recycled aggregate concrete (RAC) specimens with different water–cement ...

MoreArtificial neural network (ANN) has good potential to be used as a tool for predicting the compressive strength of recycled aggregate concrete [12] . Analysis was conducted to study the practicability of using the ANN theoretical model as prediction tool.

MoreJun 07, 2021 A new model based on multiple linear regression analysis of the data from this study and other 14 studies from the literature was developed. The model can be used to predict the compressive strength of general-use concrete mixes with recycled aggregate (20–40 MPa) considering both the recycled aggregate content and the curing age of concrete.

MoreAnalysis of the Impact on Axial Compression and Diametric tensile strength of concrete using recycled fine aggregate - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Due to the current environmental crisis and the improper disposal of construction and demolition waste (CDW), the incorporation of these as aggregates in the manufacture of concrete is presented as one ...

MoreThe inﬂuence of the use of recycled aggregates on the compressive strength of concrete: a review R.V. Silvaa, J. de Britob* and R.K. Dhirc,d aICIST, Instituto Superior Técnico,Universidade de Lisboa, Lisbon, Portugal; bICIST, Department of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico,Universidade de

MoreJun 30, 2021 The compressive strength values of the recycled aggregate permeable concrete under different water-cement ratios and recycled aggregate replacement rates were measured and calculated to determine the relationship between water-cement ratio, recycled aggregate replacement rate, and compressive strength.

Morespecimens were constructed by normal concrete with compressive strength ratings of C20 and C30, respectively, while the others were made from recycled coarse aggregate (RCA) concrete

MoreJul 07, 2015 The second study examines how the workability and compressive strength characteristics of concrete mixes are affected when varying amount of recycled concrete fines are used as cement replacement. Experimental procedures for both studies involved the breaking and crushing of cast concrete blocks to produce recycled materials.

MoreJun 12, 2021 Abstract The present work is the outcome of two years of investigations for the effect of incorporation of coarse recycled concrete aggregate (RA) in self-compacting high-strength concrete (SCHSC). By destructive and non-destructive methods; the compressive strength for SCHSC mixes with the incorporation of three different proportions of RA has been studied at various ages for up to

MoreThen, the effect of adding fibers and pozzolans on the properties of fiber-reinforced high-strength concrete including the shape of the stress–strain curve, compressive strength, strain at peak ...

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