concrete slump; (2) compressive strength; and (3) modulus of elasticity. A total of 42 mixtures were designed and tested utilizing normal strength concrete. Aggregates. One type of fine natural aggregate (FA), one type of coarse natural aggregate (NA), and two types of recycled concrete aggregates (RCA) were used in the experimental program.
Chat with salesWhen recycled aggregates are used in a concrete mix the concrete is termed as recycled aggregate concrete (RAC). Several researches have studied the influence of RA on concrete properties such as compressive strength, tensile strength, etc. ( Ajdukiewiez and Kliszczewicz, 2002, Hansen and Narud, 1983, Tsung et al., 2006, Ryu, 2002 ).
Chat with salesprediction of the ultimate compressive strength than the other methods. Keywords cold-formed steel, concrete-filled steel tube, equivalent stress-strain model, numerical analysis, recycled aggregate concrete, ultimate compressive strength 1Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, China
Chat with salesthe effect of recycled concrete aggregate on the strength of ordinary concrete. The basic engineering properties of Recycled Concrete Aggregate (RCA) is evaluated and it is compared with the Normal Aggregate (NA). Similarly, the basic concrete properties like, compressive strength.
Chat with salesThe compressive strength of concrete depends on the water to cement ratio, degree of compaction, ratio of cement to aggregate, bond between mortar and aggregate, and grading, shape, strength and size of the aggregate (Roccoand Elices, 2009; Elices and Rocco, 2008).
Chat with salesDemolished concrete can be used as recycled concrete aggregate (RCA) for construction purposes. In the research, the compressive strength of concrete made from recycled coarse aggregates and natural coarse aggregates was compared.
Chat with salesAbstract—This paper presents results of compressive strength, capillary water absorption, and density tests conducted on concrete containing recycled aggregate (RCA) which is obtained from structural waste generated by the construction industry in Turkey.
Chat with salesKeywords: compressive strength, recycled aggregate, recycled aggregate concrete, natural aggregate, natural aggregate concrete, replacement, water cement ratio 1.0 INTRODUCTION Recycled Aggregate Concrete (RAC) is concrete that using Recycled Aggregate (RA) as partially or fully replacement in coarse and fine aggregate.
Chat with salesNational 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.
Chat with salesThe ultimate strength of concrete is related to water/cement ratio and the size, shape, and strength of the aggregate used. Concrete with lower water/cement ratio (down to 0.35) makes a stronger concrete than a higher ratio. Concrete made with smooth pebbles is weaker than that made with rough-surfaced broken rock pieces for example.
Chat with salesBetween concrete with aggregates and concrete with recycled aggregates, there is no significant difference in thermal coefficient and permeability; however, there are significant differences in modulus of elasticity, compressive and indirect tensile strength, and water
Chat with salesThe rest of the mix consists of fly ash, slag, crushed recycled concrete for both coarse aggregate and sand, recycled concrete water, and admixtures. The air-entrained mix, with a water-cement (w/c) ratio of 0.45, attained an ultimate compressive strength exceeding 4000 psi and reasonable early strength.
Chat with salesThe main aim that testing the recycled aggregate is to find out the result of the strength characteristic on it and analysis whether recycled aggregate is suitable to apply in the construction area. The compressive strength of recycled aggregate concrete was
Chat with salesRahal (2007) showed that the compressive strength of concrete using recycled coarse aggregate having water absorption of 3.47% was 90% of that of natural aggregate concrete. Therefore, it is noted that workability and compressive strength development of recycled aggregate concrete are significantly dependent
Chat with salesoutcome of the study depicts that the selected factors are significantly affecting the compressive strength of concrete. However, the analysis indicates that interaction of factors has no substantial influence on compressive strength of concrete. Keywords-recycled aggregate concrete, nano-silica, compressive strength, ANOVA. 1, INTRODUCTION .
Chat with salescompressive strength formula of recycled concrete block masonry also requires a lot of valid test data, which should be paid attention to in practical application. 3.3 Analysis of stress - .
Chat with salesanalysis shows that as the W/C ratio increases the strength of concrete using aggregate is decreases and that of recycled aggregate concrete is increases. The mix-A and mix-E gave comparable compressive strength after 7 days and
Chat with salesAbstract— This research aimed at studying the effect of sulfate attack on the compressive concrete strength with various percentages of recycled aggregate replacements (0%, 30%, 60% and ).
Chat with salescompressive strength of concrete containing recycled aggregates. In the first part of the study the natural aggregates are proposed to be replaced by coarse aggregates retrieved from construction demolition waste in varying percentages i.e 20%, 30%, 40% and 50% to produce recycled aggregate concrete.
Chat with salesStrength 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 of recycled aggregate in order to achieve the same workability and compression strength as conventional concrete.
Chat with salesThe compressive strength varies with the compressive strength of the original concrete and the water-cement ratio of the new concrete It has been found that concrete made with recycled concrete aggregate has at least two-thirds the compressive strength and modulus of elasticity of natural aggregate concrete.
Chat with salesThis study evaluated the use of recycled concrete as coarse aggregate in new concrete pavements. Recycled concrete aggregate (RCA) produced from demolished pavements in three geographically-dispersed locations in Washington state were used to perform testson aggregate characte ristics, fresh concrete propertiesand hardened concrete properties.
Chat with salesmodulus of rupture of conventional concrete and recycled aggregate concrete made with coarse recycled aggregate and natural sand;( [3]- [5]). Katz [6] concluded in his work that the ratio of the flexural and the splitting strengths to the compressive strength is .
Chat with salesrecycled 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 .
Chat with salesRecycled concrete aggregates produced from all but the poorest quality original concrete can be expected to pass the same tests required of conventional aggregates. Recycled concrete aggregates contain not only the original aggregates, but also hydrated cement paste.
Chat with salesDemolished concrete can be used as recycled concrete aggregate (RCA) for construction purposes. In the research, the compressive strength of concrete made from recycled coarse aggregates and natural coarse aggregates was compared.
Chat with salesWhile 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 LASSO method described in .
Chat with salesaggregates used in the concrete mix, the water absorption of the same mixture, and the 7-day compressive strength of the concrete mix itself. The advantages of this process are (i) it eliminates the need to know the precise origin of the recycled aggregates (e.g. ceramics, mortars or recycled
Chat with salescompressive strength of the various aspects related to the use of recycled aggregates (RA) such as replacement level, size, origin, moisture content, exposure of the result- ing concrete to different environmental conditions, use of chemical admixtures and
Chat with salesRecycled Concrete Aggregate – A Viable Aggregate Source For Concrete Pavements by James Trevor Smith A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Doctor of Philosophy in Civil Engineering .
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