30.05.2020Siliceous CRCA and FRCA utilized in this study were obtained by crushing waste concrete sourced from a 15-year-old frame structure in Harbin, China. The cube compressive strength of the parent concrete is about 41.5 MPa determined by the rebound method. The CRCA and FRCA used in this work were produced by a 2-stage crushing process. weight of Natural Coarse Aggregatefor M-35 grade concrete. The compressive strengths were evaluated for 56 days of normal curing and 28 days normal + 28 days 5% NaOH contain water curing. The results show that, the compressive strength of Recycled Coarse Aggregate Concrete (RCAC) has come down with an increase in the % replacement of Natural Coarse Aggregate by Recycled Coarse Aggregate

Mechanical Properties of M 25 Grade Concrete Made With

The aim of the research is to study the attitude of the conventional mix has been designed for M 25 grade concrete and coarse aggregate replaced with pumice aggregate in volume percentages of 10, 20, 30 and 40% further cement replaced with the Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash (FA) in weight percentages of 10, 20 and 30% study in the present investigation. The properties

The aim of the research is to study the attitude of the conventional mix has been designed for M 25 grade concrete and coarse aggregate replaced with pumice aggregate in volume percentages of 10, 20, 30 and 40% further cement replaced with the Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash (FA) in weight percentages of 10, 20 and 30% study in the present investigation. The properties

cement,meanwhile,the ratio of recycled aggregate to replace natural coarse aggregate on the compressive strength of volcanic slag concrete .he regression analysis of Origin8.5 is used to sum up . 2 1234567890 `' 2018 International Conference on Civil and Hydraulic Engineering (IConCHE 2018) IOP Publishing IOP Conf. Series: Earth and Environmental Science 189 (2018) 032063 doi :10.1088

of Recycled Aggregate (RA) on compressive strength of Recycled Aggregate Concrete (RAC) and to determine the performance of a concrete. RA is used to replace natural aggregate (NA) as coarse aggregate in concrete mixes. This research also covered RAC mixtures at different water-cement ratio (0.4, 0.5, and 0.6). It was found that RAC had lower compressive strength compared to Natural Aggregate

Basic concrete properties like compressive strength, flexural strength, workability etc are explained here for different combinations of recycled aggregate with natural aggregate. Use of recycled aggregate has been found useful for pavement construction. Reasons, of use of recycled aggregate concrete in pavement construction, with technical proofs are explained here in detail. Individual

Prediction of compressive strength of concrete from early

Prediction of compressive strength of concrete from early age test result M. Monjurul Hasan Ahsanul Kabir Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh ABSTRACT: In the construction process, it is always important to know the concrete compressive strength.

20.07.2020The use of crushed concrete or Recycled Concrete Aggregate (RCA) has proven to be especially suitable for high-performance concrete, resulting in countless experimental tests (Etxeberria et al., 2007) and many reviews of conventional concrete manufactured with RCA regarding fresh state (Silva et al., 2018), compressive strength (Silva et al., 2015), mechanical behavior (Behera et al.,

recycled aggregate. However, the inferior quality of recycled aggregate (RA) has restricted its use to low-grade applications such as roadwork sub-base and pavements, while its adoption for higher-grade concrete is rare because of the lower compressive strength and higher variability in mechanical performance of RA. A new concrete mixing method

2319-5606 Volume 2, 0, October 2013 study on compressive strength of recycled concrete aggregate as complete replacement of natural aggregate [8] M.S.Shetty, (2005), Concrete Technology, 17th edition. New Delhi: S. Chand and Company. [9] M L Gambhir, Concrete Technology .

as aggregate by partial replacement of natural aggregates. The parameters of this investigation include the compressive strength of concrete specimens. Cubes of 150 X 150 X 150mm size for compressive strength, cubes are casted for the testing of concrete. The concrete having compressive strength of 20N/mm2 (M 20) is used

Title: CREEP AND SHRINKAGE OF NORMAL STRENGTH CONCRETE WITH RECYCLED CONCRETE AGGREGATES Author(s): Adam M. Knaack and Yahya C. Kurama Publication: Materials Journal Volume: 112 Issue: 3 Appears on pages(s): 451-462 Keywords: creep compliance; recycled concrete aggregate; shrinkage. Date: 5/1/2015 Abstract: This paper describes an experimental

Concrete Mix Design – M 20 Grade Of Concrete. ii) Avg. comp. strength 7 days = 46.5 more than 33.0 OK 28 days Type Crushed stone aggregate can you please tell me.. how to derive mix design for M20 and M25 concrete.. if fine aggregate and cement is partially replaced by waste Read more. Engineering ABSTRACT Use of Recycled Coarse Aggregate in Basic concrete properties

Strength and Durability Study on Recycled Aggregate Concrete Using Glass Powder Priscilla M#1, Asst Prof. Pushparaj A Naik*2 # M.Tech student, Civil Engineering Dept, NMAMIT College, NITTE,UDUPI DIST, KARNATAKA, INDIA. * Asst. Prof, Civil Engineering Dept, NMAMIT College, NITTE, UDUPI DIST,KARNATAKA, INDIA. Abstract— Waste glass powder was used as secondary cementitious

Prediction of compressive strength of recycled aggregate

01.03.2013However, currently ANN are mainly used in concrete made only with natural aggregates, and is rarely adopted in the concrete containing recycled aggregates because of their complex composition of recycled aggregates, although Topu and Sarıdemir made a trial on predicting the compressive and splitting tensile strengths of recycled aggregate concretes containing silica fume.

The effect of concrete grade on the bond between 12 mm diameter deformed steel bars and recycled aggregate concrete (RAC) has been investigated with the help of 45 pullout tests with concentric rebar placement for coarse recycled concrete aggregate (RCA) replacement levels of 25, 50, 75 and . For all the three concrete grades, the measured bond‐slip relationships indicate similar

The effects of the replacement ratio of coarse aggregate (ratio between the mass of recycled coarse aggregate to the total mass of coarse aggregate) and degree of FRP confinement are investigated. Both the axial and lateral strain responses of the specimens are examined in detail. The test results show that specimens with a replacement ratio of 20% behave similarly to that of normal concrete

Keywords: Recycled plastic, Replacement of Coarse aggregate, compressive strength, plastic concrete. Introduction: Landfill sites are becoming over crowded and expensive for waste disposal, efforts made are to minimize the quantities of materials that are delivered to landfills. The threat due to leaching of nonbiodegradable materials like waste plastics, scrap tyres. e- -waste may contaminate

Grade of concrete is defined as the minimum strength the concrete must posses after 28 days of construction with proper quality control. Grade of concrete is denoted by prefixing M to the desired strength in MPa. For example, for a grade of concrete with 20 MPa strength, it will be denoted by M20, where M stands for Mix.

Similar to compressive strength test results, concrete incorporating 10% SF and con-taining 4/12 mm fraction recycled aggregates showed better performance among recycled aggregate concretes. 2014 Production and hosting by Elsevier B.V. on behalf of Housing and Building National Research Center. Introduction Many structures in Turkey are now either reaching the end of their design life time

COMPRESSIVE STRENGTH OF RECYCLED AGGREGATE CONCRETE WITH VARIOUS PERCENTAGE OF RECYCLED AGGREGATE Suraya Hani Adnan, Lee Yee Loon, Ismail Abdul Rahman, Hamidah Mohd Saman, Mia Wimala Soejoso Fakulti Kejuruteraan Awam dan Alam Sekitar Universiti Tun Hussein Onn Malaysia (UTHM) E-mail: surayauthm.edu.my ABSTRACT: Compressive strength

As a result, the concrete sector is now finding means to exploit alternative elements for concrete production in order to attain sustainable growth and to reduce the harsh environmental effect [7 Z.H. Duan, S.C. Kou, and C.S. Poon, Prediction of compressive strength of recycled aggregate concrete using artificial neural networks, Constr. Build.

The optimum silica fume replacement percentage for obtaining maximum 28- days strength of concrete ranged from 10 to 20 % (4)(5). Cement replacement up to 10% with silica fume leads to increase in compressive strength, for M30 grade of concrete.