. 30 (6): 10861088. chang, c. y., r. huang, p. c. lee, and t. l. weng. 2011. application of a weighted grey-taguchi method for optimizing recycled aggregate concrete mixtures.Get Price
article google scholar. garg, p., singh, h., & walia, b. s. (2013). optimum size of recycled aggregate. ge-international journal of engineering research. pp. 3541, issn:2321-1717.
the project, especially mast team for their contributions. recommended articles. citing articles (0). references. chen et al., 2003. h.j. chen, t. yen, k.h. chen. use of building
aggregate and environmental considerations. to fix these problems on surplus of concrete waste and shortage of proper virgin aggregate, the recycling and reuse of waste concrete as
, as specimens aged until 56 days, the rac 74 reached the compressive strength of n42. especially, the rac 100 showed a lower compressive strength than n42 but at 56 days, the.
2020. ram lal riyar mudasir nazeer kanish kapoor paramveer singh. this study presents the results of an experimental investigation performed on hardened state properties of
construction and building materials, vol. 24, no. 9, pp. 16161620, 2010. view at: publisher site google scholar; k. rahal, mechanical properties of concrete with recycled coarse
influenced by the material strength, the initial mixing ratio, and the initial void ratio. on this basis, the fractal dimension of recycled mixed coarse aggregates is determined by the
germany). the particle distribution of the other sample was measured by using the horiba la-950 laser particle size analyzer (horiba ltd., kyoto, japan). 2.5. concrete sample design
the cc concrete was reduced to 300 kg of cement/m3 of the concrete mix, with an effective w/c ratio of 0.55, while the same conditions were maintained for the production of the rc100.
the reuse of cdw in new concrete production could contribute to the construction sector sustainability through minimizing landfill and the need for new raw materials. literature data
materials must contain no clay lumps, foreign matter or excavated soils, and the clean coefficient must be less than 2 and the sand equivalent greater than 35. the materials must also
compared with that of. 72h treated by carbonization. the absolute value of the apparent density varies little, the results of 12h. and 48h might be caused by error in the apparent density
, 63 (8) (2011), pp. 617-627. google scholar. . s. car. influence of aggregates on chloride diffusion coefficient into mortar. cement concr. res., 33 (7) (2003), pp. 1021-1028.
, especially in the case of cca100. mechanical pre-processing is most impactful in the reduction of water absorption when the coarse and fine aggregates are cca such as cca100.
recycled coarse aggregate (rca) made from waste concrete is not a suitable structural material as it has high absorption of cement mortar, which adheres on the aggregate surface and on the tiny cracks thereon. moreover, the carbonation due to cement mortar adhesion was measured through a carbonation test.
china building material industry publishing house, beijing (2007).  beibei cao: study on the thermal properties of concrete and the technology of concrete reuse (in chinese),
was also used for casting of concrete cubes using similar mix proportion (table 2) as in case of unwashed recycled coarse aggregates considering it as final mix. all hardened concrete
construction of an new concrete pavement. however, when the contractor or producer retains ownership over a winter, between construction seasons, it becomes a longer-term asset,
trial mixes. the suggested modified procedure, however, demands 10 more cement which is considered quite reasonable and acceptable in view of the inferior quality of recycled
). 0.153. 0.118. 0.112. 0.109. 4. discussion. the environmental assessment of recycled aggregate concrete (rac) for structural use and its comparison with natural aggregate concrete
from 6.3 to 7.6). since the mixer capacity forced the use of three mixes per cycle (30 15 cm. cubic specimens were to be produced in each cycle), some variations to the basic com
standard 1141 (as 1141, 1974). eight ra samples (samples 1 to 8) collected from c&d sites and centralised recycling plants in brisbane and gold coast, australia are used in this