This work studies the physical and mechanical properties of recycled concrete aggregate (recycled aggregate from concrete waste) and their influence in structural recycled concrete compressive strength. For said purpose, a database has been developed with the experimental results of 152 works selected from over 250 international eferr ences.
2015-05-14· Abstract. This stone 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
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.
Considering on the current difficulties of predicting the compressive strength of recycled aggregate concrete, this stone 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
2019-10-12· aggregate as well as for the recycled aggregate. The use of recycled aggregate generally increases the drying shrinkage creep & porosity to water & decreases the compression strength of concrete compared to that of natural aggregate concrete. It is nearly 10-30% as per replacement of aggregate.
2013-07-08· University of Southern Queensland Faculty of Engineering and Surveying High-Strength Structural Concrete with Recycled Aggregates A Dissertation Submitted By Nelson, Shing Chai NGO In fulfilment of the requirement of Course ENG 4111 and ENG 4112 Research Project
This stone 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).
For this purpose, compressive strength at 7, 28, 90 and 365 days are determined for fully natural and recycled aggregate concrete mixes made with or without nano-silica. In addition to above, Vickers microhardness test and backscattered-mode scanning electron microscopic analysis is carried to characterize ITZ of concrete mixes.
The applications of pervious concrete made with recycled aggregate (RA) have been hindered by its significantly reduced strength. In this study, a silane polymer emulsion treatment method was used to promote the strength of pervious concrete while maintaining its permeability.
2019-07-01· Experimental Study of Compressive Strength of Recycled Aggregate Concrete . Prof. Dharmesh K. Bhagat, Civil Engineering Department, Sarvajanik College of Engineering and Technology, Surat, India . Jigar P. Parmar . Civil Engineering Department,
2019-01-28· This paper, therefore, evaluated the feasibility of reusing waste concrete as recycled aggregate (RA) to produce concrete. The replacement levels were 20 The compressive strength of the concrete with 80% RA was 60 MPa at 28 days and 77 MPa at 56 days. Rapid Sieve analysis, aggregate
The influence of the use of recycled aggregates on the compressive strength of concrete : a review . This stone provides a systematic review of 119 publications, selected from 235, pub-lished over a period of 36 years from 1978 to 2014, relating to the effect on concrete
Experimental work for the compressive strength of recycled aggregate concrete was designed and performed with 264 cubes. The results indicated that the recycled coarse aggregate (RCA) replacement ratio has a remarkable influence on the compressive strength of recycled aggregate concrete, the relationships between the compressive
On statistical characteristics of the compressive strength of recycled aggregate concrete J. Xiao, J. Li and Ch. Zhang This stone presents a statistical analysis of the compressive strength of recycled aggregate concrete (RAC) with recycled coarse aggregate (RCA) coming from one single source.
2018-12-30· than that of corresponding recycled aggregate concrete. The results of the study showed that recycled concrete aggregate can potentially replace completely natural aggregate in the production of both non-structural and structural concrete. Keywords: compressive strength, coarse aggregate, concrete, natural aggregate, recycled concrete aggregate.
This work studies the physical and mechanical properties of recycled concrete aggregate (recycled aggregate from concrete waste) and their influence in structural recycled concrete compressive strength. For said purpose, a database has been developed with the experimental results of 152 works selected from over 250 international references.
Microstructure analysis of hardened recycled aggregate concrete M. Etxeberria, E.Va´zquez and A. Marı´ Universitat Polite´cnica de Catalunya (UPC) Fifty percent of the total weight of construction and demolition waste is concrete. Consequently, the utilisation of
While the focus of this study is limited to the compressive strength of recycled aggregate concrete, the method used in this study is applicable to a variety of problems in environmental and sustainability research where data-driven approaches are uti-lized. The
Compressive Strength Analysis On Recycled Aggregate Concrete; 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
2016-08-25· 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).
With the increase in the use of recycled aggregate concrete (RAC), it is necessary to clearly understand its behavior and characteristics. In this paper, experimental study on compressive strength of RAC with same water/cement ratio is conducted. Firstly, influence of recycled coarse aggregate contents on cube compressive strength of
2017-04-07· found that with addition of recycled aggregate the concrete strength and workability decrease, to improve the strength and the workabilit y, the flyash is added at the rate of 10% and 20% as replacement of PPC. The compressive strength of concrete is determined, after curing periods of 7, 28 and 90 days. To establish an empirical relationship
Recycled aggregate concrete was in close proximity to normal concrete in terms of split tensile strength and compressive strength. The slump value of recycled aggregate concrete was low and that can be improved by using saturated surface dry (SSD) coarse aggregate.
2013-05-25· This stone presents an experimental research on mechanical properties of recycled aggregate concrete (RAC) at low and high water/binder (W/B) ratios. Concrete at two W/B ratios (0.255 and 0.586) was broken into recycled concrete aggregates (RCA). A type of thermal treatment was employed to remove mortar attached to RCA. The RAC at a
2017-03-24· compressive strength. When the CoV of RAC compressive strength is 20%, the RAC design strengths are 0.93 and 0.90 times of the NAC design strength with a 95% confidence level for grade C30 and C40 concrete, respectively. Keywords: recycled aggregate concrete (RAC); beams in bending; strength vari-ation; reliability index; design strength .
2018-10-21· Crushed concrete aggregates also called as recycled concrete aggregates are fragments and pieces of concrete buildings which are demolished or rebuild. These crushed concrete are cleaned from dirt and broken to smaller pieces to manufacture aggregate which is termed as recycled aggregate.
2017-10-24· 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
Compressive behavior of steel fiber reinforced recycled aggregate concrete after exposure to elevated temperatures G.M. Chena, Y.H. He a, H. Yanga, J.F. Chena,b,* and Y.C. Guo a a School of Civil and Transportation Engineering, Guangdong University of Technology,
2018-12-15· strength of concrete: Compressive strength of concrete is increased with the addition of 2.5 % rubber. Results are more effective for Mix M25 as compared to Mix M30 for a replacement of 2.5% coarse aggregate by rubber. Compressive strength of concrete is slightly decreased with addition of 5% of rubber.
2019-08-06· Micro-structural analysis of recycled aggregate concrete produced from two-stage mixing approach . Vivian W. Y. Tam 1, X. F. Gao2 and C. M. Tam3* 1 Department of Building & Construction, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong
Today, efforts are underway in a number of areas to conserve the environment and protect natural resource. In the construction industry, many researchers have studied the development of new concrete using recycled aggregate (RA). This research proposes a multiple regression model (MRM) for predicting the compressive strength of
2018-11-01· | MarchApril 87 This stone 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.
Study on effect of compressive strength of recycled aggregate concrete with water cement Influence of moisture states of natural and recycled aggregates on the slump and compressive strength of concrete. Cem Concr Res Gao XF, Tam CM. Microstructural analysis of recycled aggregate concrete produced from two-stage mixing
2019-01-10· This stone presents a proposed uniaxial damaged stone constitutive relation of recycled aggregate concrete (RAC) based on the experimental studies. A total of five groups of RAC specimens with different recycled coarse aggregate (RCA) replacement percentages of 0, 25%, 50%, 75%, and 100%, respectively, are
2018-05-06· mineral admixed recycled aggregate concrete by using the relationship between compressive strength, and the various percentage replacement of virgin aggregate with recycled aggregate and also cement with flyash and slag. 2. Multiple Li near Regression Analysis MLR model used to predict the relationship between number of independent
2014-12-04· on compressive strength of concrete. Compressive Strength of Concrete, f’c Concrete Technology 14 2.4a) Influence of Mineralogy Differences in the mineralogical composition of aggregates affect concrete strength. fc 1000 psi The reason for limestone to produce higher strength is because CaCO3.Ca(OH)2.xH2O is formed at interface in TZ.