Predicting Compressive Strength of Recycled Concrete for ...

recycled aggregate concrete and design optimal mix proportions. Artificial neur-al network (ANN) has good potential to be used as a tool for predicting the compressive strength of recycled aggregate concrete 12]. Analysis was con- [ducted to study the practicability of using the ANN theoretical model as predic-tion tool. The results showed that ...

PERFORMANCE OF RECYCLED AGGREGATE CONCRETE

ABSTRACT: Compressive 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%, 100%) of Recycled Aggregate (RA) on compressive strength of Recycled Aggregate Concrete (RAC) were investigated. RA is used to

aggregate Topic - American Concrete Institute

Jan 23, 2020· Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume of concrete. Aggregates influence the workability of plastic concrete and also the durability, strength, thermal properties, and density of hardened concrete. Particle size divides aggregates into two categories: fine and coarse. Most fine aggregates are sand and contain particles smaller than 3/8 ...

THE ESTIMATION OF COMPRESSIVE STRENGTH OF …

The Estimation of Compressive Strength of Normal and Recycled Aggregate Concrete 421 water-cement ratio) concrete mixtures explanation is different. For water-cement ratios under 0.3, disproportionately high increases in the compressive strength can be achieved with very small reductions in water-cement ratio. A significant improvement in the

The Effect of Aggregate Properties on Concrete

The compressive aggregate strength is an important factor in the selection of aggregate. When determining the strength of normal concrete, most concrete aggregates are several times stronger than the other components in concrete and therefore not a factor in the strength of normal strength concrete. Lightweight aggregate concrete may be more ...

Compressive strength prediction of recycled concrete based ...

Jun 30, 2018· Considering on the current difficulties of predicting the compressive strength of recycled aggregate concrete, this paper proposes a prediction model based on deep learning theory. First, the deep features of water-cement ratio, recycled coarse aggregate replacement ratio, recycled fine aggregate replacement ratio, fly ash replacement ratio as ...

Compressive stress-strain relation of recycled aggregate ...

Ordinary Portland cement with a 28d compressive strength of 32.5 MPa was used in this study. The fine aggregates used were river sand. The coarse aggregates included the NCA and RCA, the latter of which were obtained by crushing the waste concrete specimens.

Strength of Recycled Concrete Made From Crushed Concrete ...

Compressive strength of hardened concretes made from recycled concrete coarse aggregates was studied as a function Of the compressive strength of original concretes from which the coarse aggregates were derived Also studied were properties of fresh concretes made from recycled aggregates, gradings of crusher products, properties of recycled ...

The Mechanical Properties of Recycled Coarse Aggregate ...

The screening analysis of fine aggregate and coarse aggregate was carried out in accordance ... "Study on strength characteristics of recycled aggregate concrete using polypropylene fiber," Journal of Civil ... Z. P. Sun, and X. Hao, "Study on compressive strength of recycled aggregate concrete," Journal of Tongji University, vol ...

Compressive strength and hydration processes of concrete ...

Abstract. This paper deals with the correlation between the time evolution of the degree of hydration and the compressive strength of Recycled Aggregate Concrete (RAC) for different water to cement ratios and initial moisture conditions of the Recycled Concrete Aggregates (RCAs).

Microstructure and Mechanical Properties of Recycled ...

Sep 26, 2013· The basic properties of recycled aggregate concrete (RAC) including the compressive strength, the elastic modulus, and chloride penetration depth were explicitly investigated. And the microstructure of recycled concrete aggregate (RCA) was revealed to find the seawater corrosion by using scanning electron microscope (SEM).

Effect of recycled concrete aggregates on strength and ...

This paper investigates the effect of recycled con-crete aggregate (RCA) on the rate of concrete compressive strength and stiffness gain with time and on the bond strength between seven-wire steel prestressing strand and concrete. The use of RCA did not have a significant effect on the rate of concrete compressive strength or stiffness

Experimental Study of Compressive Strength of Recycled ...

Experimental Study of Compressive Strength of Recycled Aggregate Concrete - written by Yati R. Tank, Jigar P. Parmar, Darpan H. Gadhiya published on 2014/04/25 download full article with reference data and citations

Crushed Concrete Aggregates - Properties and Uses of ...

Strength variation of concrete produced from recycled aggregate is higher than concrete made from natural aggregate. For the recycled aggregate concrete, it would be necessary to add more cement in concrete made with 100% of recycled aggregate in order to achieve the same workability and compression strength as conventional concrete.

On statistical characteristics of the compressive strength ...

It was found that the statistical characteristics of the compressive strength of recycled aggregate concrete do not differ very much from those of normal concrete (NC) with similar strength ...

Compressive Strength of Lightweight Concrete | IntechOpen

This chapter has been prepared with the hope that its readers will become interested in lightweight concrete (LWC). Therefore, after a brief background of lightweight concrete, different types of LWC will be introduced and then LWC made of lightweight aggregates (LWA) will be specifically discussed. Compressive strength and density of LWC are the main points of interest in this chapter. In ...

Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015· Compressive strength and resistance to chloride ion penetration and carbonation of recycled aggregate concrete with varying amount of fly ash and fine recycled aggregate. Waste Management, 31 (11), 2352–2360. doi: 10.1016/j.wasman.2011.06.014 .

Effect of Recycled Coarse Aggregate on Concrete Properties ...

Abstract. This research was conducted with the use of recycled aggregate as modification. In terms of the use of recycled aggregate, the percentage of recycled aggregate should be determined because the strength of concrete would not be obtained by the high percentage of recycled aggregate.The scope of study is about comparison between recycle coarse aggregate and natural aggregate in …

Flexural Fatigue Analysis of Concrete made with 100% ...

To improve the strength of concrete made with RCA, a method has been investigated i.e. by applying acoustic emission technique for detecting micro-cracking in concrete under compression [8]. The compressive strength and stress–strain curves of recycled aggregate concrete (RAC) with different replacement percentages

Evaluation of Concrete Strength Made with Recycled Aggregate

Concrete with 80% RA showed good workability and mechanical properties. The compressive strength of the concrete with 80% RA was 60 MPa at 28 days and 77 MPa at 56 days. ... Sieve analysis, aggregate crushing value, specific gravity ... Abdelfatah, A.S. Influence of recycled concrete aggregates on strength properties of concrete. Constr. Build ...