The recycled lightweight aggregate replacement ratio was used as a variable. Subsequently, 15 cubes with dimensions of 150 mm × 150 mm × 150 mm were used to analyze the cubic compressive strength test. Furthermore, 15 prisms of size 150 mm × 150 mm × 300 mm were also employed for exploring the axial compression and stress-strain curves. 3.
Abstract This 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.
For the recycled coarse aggregate, it should be noted that it contained two types of RCA with different gradation of 5–16 mm and 16–31.5 mm in the ratio of 3:2. The proportions of each component, the tested cubic compressive strength ( fcu) and the elastic modulus ( Ec) were presented in Table 3. Table 3.
This study investigates the fundamental characteristics of concrete using recycled concrete aggregate (RCA) for its application to structural concrete members. The specimens used coarse RCA, various replacement levels of natural aggregate with fine RCA, and several levels of fly ash addition.
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.
This research proposes a multiple regression model (MRM) for predicting the compressive strength of recycled aggregate concrete (RAC). The compressive strength data of 85 specimens of RAC strengths were used for constructing and evaluating the prediction model. The average error rate of the constructed MRM evaluation is 7.18 percent.
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 …
Prediction of compressive strength (CS) of environmentally friendly (EF) concrete containing recycled aggregate is important for understanding sustainable structures' concrete behaviour. In this research, the capability of the deep learning neural network (DLNN) approach is examined on the simulation of CS of EF concrete.
Recycled aggregate concrete (RAC) specimens with different water–cement ratios and replacement levels of recycled coarse aggregate (RCA) were prepared. The effects of these two factors on...
Artificial 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.
Firstly, linear, nonlinear regression and Random Forest methods are used to propose prediction models for estimating compressive strength of concrete with recycled aggregate. …
The purpose of the study is to characterize the strength recycled aggregate concrete mechanically especially compressive strength in order to propose improvement methods in …
Abstract. This chapter intensively studied the strength indexes of recycled aggregate concrete (RAC), which includes the RAC compressive strength, tensile strength, flexural …
A 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 ...
Works on recycling have emphasized that if old concrete has to be used in second generation concrete, the product should adhere to the required compressive strength. This paper reports the basic properties of recycled fine aggregate, recycled coarse aggregate and also comparing it with the natural aggregate.
Regression Analysis on Compressive Strength Change Curve of Recycled Aggregate Concretes during Age Periods Abstract: In this paper, a regression analysis method of compressive strength curve of recycled concrete is proposed. Firstly, the compressive strength of recycled aggregate concrete at different ages is measured through laboratory tests.
This study examined that compressive and flexural strengths of recycled aggregate concrete at 7 and 28 days and compared the strength with control mix with natural aggregates. …
Furthermore, other studies indicated that concrete with RCA has comparable fresh and hardened properties to normal aggregate concrete, the ratio between splitting tensile and …
Compression Testing Machine (Capacity-2000 kN) with a loading rate of 140 kg/cm 2 /min [IS: 516–1959] [42] was used to find the compressive strength of 100 mm size SCCs cubes produced using different materials at 28, 180, and 270 days. Compression Testing Machine is shown in Fig. 2, and Fig. 3 shows the concrete samples in curing tank.
The performance of compressive strength produced by Recycled Aggregate Concrete (RAC) and results are compared with the Natural Coarse Aggregate Concrete (NAC). The studies were conducted with M20 mix with the selected w/c ratio of 0.5 and the development of compressive strength of the RAC and NAC at the age of 7 & 28 days were studied.
As noted in Sections 3.1–3.4, the RCA strength improves after the aggregate is treated with SFC paste, indicating that the enhancement in RCA quality increases the compressive …
Request PDF | On Mar 21, 2015, Mehran Seifollahi and others published Compressive strength of recycled aggregate concrete ( in Persian ) | Find, read and cite all the research you need on ResearchGate
This 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 …
The application of recycled aggregate as a sustainable material in construction projects is considered a promising approach to decrease the carbon footprint of concrete structures. Prediction of compressive strength (CS) of environmentally friendly (EF) concrete containing recycled aggregate is important for understanding sustainable structures’ …
This paper analyzed the cube compressive strength of concrete containing recycled aggregate as part of coarse aggregates and rubber particles as part of fine aggregate, simultaneously. The effect of content of both aggregates on concrete compressive strength was studied. 25 sets of samples were made with a constant water/cement ratio of 0.39.
RCA compressive strength with 50% replacement is found to be 15% lesser and 28% lesser in replacement compared to the natural aggregate concrete. RAC045100 shows the flexural strength of 3.10 N/mm 2, whereas RAC04550 and NC045 recorded the strengths of 3.25–3.55 N/mm 2, respectively.
Using recycled aggregate in the construction of reinforced concrete (RC) buildings has become essential to reduce the waste produced from demolished buildings. In this paper, the influence of using… View 3 excerpts, cites background The Optimization of Mix Proportion Design for SCC: Experimental Study and Grey Relational Analysis
It is the experimental study of recycled concrete aggregate (RCA) when it is compared with the natural concrete aggregate on account of its properties. Cubes having dimension 150x150x150 mm3 were casted using recycled aggregate by replacing the natural aggregate by 0%, 25%, 50% and 75% and corresponding results of compressive strengths were noted.
The compressive strength of concrete is an important mechanical property, which is used as a quantitative measure to estimate other mechanical properties of normal concrete. …
•The use of recycled aggregates is a promising solution to enhance sustainability. •Recycled aggregates affect both hydration processes and compressive strength. •A fundamental approach is proposed to unveil the influence of recycled aggregates. •Some experimental comparisons are presented to validate the more » Authors: