“…The PSD curve of the RCA samples shows that there were particles larger than 20 mm and smaller than 0.6 mm that did not conform to the standard specifications.Fig. 2PSD curves of the RCA samples with upper and lower limit curves of the standard base layer materials (Jayakody et al., 2017). …”
Section: Main Textmentioning
confidence: 98%
“…2 and Table 1 as a reference. These values were extracted from a previous research study by Jayakody et al. (2017) since the same lot of the RCA samples was used for this test program as well.…”
Section: Main Textmentioning
confidence: 99%
“…2PSD curves of the RCA samples with upper and lower limit curves of the standard base layer materials (Jayakody et al., 2017). …”
Section: Main Textmentioning
confidence: 99%
“…RCA have been subjected to many research studies to investigate their properties and ascertain their applicability as pavement materials over the past years (Jayakody et al., 2014; Gobieanandh and Jayakody, 2016). Many studies revealed that the strength properties of RCA were comparable to those of the conventional pavement aggregates even with constituents, such as asphalt, bricks and glass (Jayakody et al., 2017; Arulrajah et al., 2014). Further investigations on RCA are needed to determine their performance characteristics under repetitive loads since only a few research findings are available on this topic.…”
Use of recycled concrete aggregates (RCA) as a pavement material is one of the most sustainable engineering applications for the pavement industry. Investigation on the performance characteristics of RCA, such as elastic and plastic deformations of RCA is therefore, needed to assess RCA's application as an unbound pavement material. In this study, repeated load tri-axial (RLT) tests were conducted to investigate the response of RCA to elastic and plastic deformations under dynamic loads. The elastic and plastic properties were analysed through the ‘resilient modulus’ and the accumulation of plastic strain, respectively, at different confining stresses and moisture contents of the RCA specimens. The results from the tests revealed a steady gain of stiffness of the RCA specimens with an increase of load cycles at low moisture contents, high confining pressures and high vertical axial pressure.
“…The PSD curve of the RCA samples shows that there were particles larger than 20 mm and smaller than 0.6 mm that did not conform to the standard specifications.Fig. 2PSD curves of the RCA samples with upper and lower limit curves of the standard base layer materials (Jayakody et al., 2017). …”
Section: Main Textmentioning
confidence: 98%
“…2 and Table 1 as a reference. These values were extracted from a previous research study by Jayakody et al. (2017) since the same lot of the RCA samples was used for this test program as well.…”
Section: Main Textmentioning
confidence: 99%
“…2PSD curves of the RCA samples with upper and lower limit curves of the standard base layer materials (Jayakody et al., 2017). …”
Section: Main Textmentioning
confidence: 99%
“…RCA have been subjected to many research studies to investigate their properties and ascertain their applicability as pavement materials over the past years (Jayakody et al., 2014; Gobieanandh and Jayakody, 2016). Many studies revealed that the strength properties of RCA were comparable to those of the conventional pavement aggregates even with constituents, such as asphalt, bricks and glass (Jayakody et al., 2017; Arulrajah et al., 2014). Further investigations on RCA are needed to determine their performance characteristics under repetitive loads since only a few research findings are available on this topic.…”
Use of recycled concrete aggregates (RCA) as a pavement material is one of the most sustainable engineering applications for the pavement industry. Investigation on the performance characteristics of RCA, such as elastic and plastic deformations of RCA is therefore, needed to assess RCA's application as an unbound pavement material. In this study, repeated load tri-axial (RLT) tests were conducted to investigate the response of RCA to elastic and plastic deformations under dynamic loads. The elastic and plastic properties were analysed through the ‘resilient modulus’ and the accumulation of plastic strain, respectively, at different confining stresses and moisture contents of the RCA specimens. The results from the tests revealed a steady gain of stiffness of the RCA specimens with an increase of load cycles at low moisture contents, high confining pressures and high vertical axial pressure.
“…Xie et al [26] studied the effects of combined usage of ground granulated blast furnace slag and fly ash on workability and mechanical properties of alkaliactivated geopolymer concrete with recycled aggregates. Jayakody et al [27] studied the effects of reclaimed asphalt materials on geotechnical characteristics of recycled concrete aggregates as a pavement material. Li et al [28] studied the liquefaction characteristics of recycled concrete aggregates.…”
In this paper, to study the compressive and flexural properties of recycled concrete hollow blocks, the quality substitution rate of recycled fine aggregates is taken as a variable parameter, and four kinds of substitution rates are designed, which are 0%, 30%, 60%, and 100%. At the same time, one kind of recycled coarse and fine aggregates is designed, and the quality substitution rate is 100%. 110 specimens of MU10 and MU7.5 strength grades are tested for compressive and flexural strength. The failure process and morphology of the specimens are observed to obtain compressive and flexural strength. Based on the test data, the relationship between compressive and flexural strength of recycled fine aggregates with different replacement ratios is analyzed in detail. The main findings are that experiment results show the compressive and flexural strength decrease with the increase of substitution rate of recycled fine aggregates under the same other conditions. The work of the paper is a new reform for the source of raw materials for wall materials, and it is a new way for the reuse of concrete garbage and has important environmental protection significance and engineering practical significance for building energy saving.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
