Assessment on the engineering properties of ready-mixed concrete using recycled aggregates

Sheen, Yeong-Nain; Wang, Her-Yung; Juang, Yi-Ping; Le, Duc-Hien

doi:10.1016/j.conbuildmat.2013.03.072

Cited by 85 publications

(37 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In accordance with the results of other researchers [71], for concretes fabricated with w/c ratios close to 0.40, the differences in fc between a concrete made with natural aggregate and one made with RA can reach values of 25%. [22], for a w/c ratio of 0.50 and cement content of kg/m 3 , found a 20% to 25% reduction in fc in those cases in which the coarse fraction was completely replaced with RA from concrete using a process of pre-saturation of the aggregate.…”

Section: Mechanical Propertiessupporting

confidence: 92%

Steel-fibre-reinforced self-compacting concrete with 100% recycled mixed aggregates suitable for structural applications

Ortiz

Fuente

Sebastià

et al. 2017

Construction and Building Materials

View full text Add to dashboard Cite

This research focuses on designing and characterizing steel-fibre-reinforced self-compacting concrete using recycled aggregates (SFR-SCC-RA). Six different concrete dosages have been designed, and two extensive mechanical and physical characterization programs have been conducted. The first program was developed in a concrete production plant to verify the compatibility of the new material with the existing production systems. The second program was developed in a laboratory under controlled temperature and humidity conditions. Although compressive strengths greater than 25 N/mm2 have been reached (which allows the material to be classified as structural), the design in this initial phase is oriented to applications with limited mechanical requirements (e.g., foundations, earth retaining walls and pavements, in which design forces are moderate).Peer ReviewedPostprint (author's final draft

show abstract

Section: Mechanical Propertiessupporting

confidence: 92%

Steel-fibre-reinforced self-compacting concrete with 100% recycled mixed aggregates suitable for structural applications

Ortiz

Fuente

Sebastià

et al. 2017

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…According to these results, it can be observed that RAC has a flexural strength reduction of about 15% and follows a trend similar to those results of compressive strength compared to NAC. A similar trend can be seen, as Sheen et al (2013) [8] reported about a 10-23% reduction in the flexural strength for the specimens prepared with RA when compared with control specimens with normal coarse aggregate. The lower flexural values could be attributed to the weak nature of the RA, which allows the aggregate to fail faster compared to the cement paste.…”

Section: Flexural Strengthsupporting

confidence: 68%

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

et al. 2017

View full text Add to dashboard Cite

Abstract:The utilization of traditional supplementary cementitious materials (SCMs) has become more intense in the concrete industry due to their better long-term properties. This research evaluates the fresh and hardened properties of concrete that was developed using a high amount of recycled aggregate (RA) incorporated with sustainable SCMs. Rice husk ash (RHA), palm oil fuel ash (POFA) and palm oil clinker powder (POCP) were used as SCMs at 10%, 20% and 30% cement replacement levels to investigate their positive role in the performance of RA concrete. The results showed that the 10% replacement level of cement by RHA produced the highest strength at all ages tested. Although POFA and POCP were found to negatively affect the strengths at an early age, the hardened properties showed improvement after a relatively long curing time of 90 days. In addition, the targeted compressive strength of 30 MPa was achieved by using SCMs at levels up to 30%. Overall, the sustainable SCMs can reduce the quantity of cement required for concrete production, as well as reduce the conventional cement with the industrial by-products, which are considered as waste materials; thus, the concrete produced using up to 30% of SCMs as a replacement for cement could be considered as more environmentally-friendly concrete.

show abstract

“…Nevertheless, the compressive strength of RAC with fibers at both 7 and 28 is more than the compressive strength of normal concrete without fibers. The decrease in compressive strength is due to the lower strength of recycled aggregates by the porous nature than natural aggregates . The compressive strength of RAC with GF, WF, and SF at 7 and 28 days are 28.1, 38.51 MPa; 26.98 MPa, 34.26 MPa; 30.45 MPa, 40.14 MPa against the values of 26.51 MPa, 32.14 MPa of normal concrete without fibers.…”

Section: Resultsmentioning

confidence: 95%

Influence of different types of fiber on the properties of recycled aggregate concrete

Meesala

2019

Structural Concrete

View full text Add to dashboard Cite

Utilization of recycled aggregate from the construction and demolition waste as a partial substitution of natural aggregate in the concrete has been increased in the recent times in order to minimize the consumption of natural resources and the harmful effects to the environment. The present investigation mainly focuses on the influence of different fibers on mechanical and other properties of concrete made with 50% of recycled coarse aggregate (RCA) as well as concrete with 100% natural aggregate. Three types of fibers such as Woolen fibers (WF), Glass fibers (GF), and Steel fibers (SF) were used in both normal and recycled aggregate concrete mixes. The workability, compressive strength, split tensile and flexural strengths, modulus of elasticity, density, water absorption and volume of voids, and ultrasonic pulse velocity (UPV) properties of all the mixes were investigated. From the experimental findings it was observed that the fibers significantly improve the mechanical properties of both normal and recycled aggregate concretes. Further among the WF, GF, and SF, SFs had shown more positive impact on the properties of concrete. K E Y W O R D S compressive strength, flexural strength, glass fibers, recycled aggregate concrete, steel fibers, ultrasonic pulse velocity (UPV), woolen fibers

show abstract

Assessment on the engineering properties of ready-mixed concrete using recycled aggregates

Cited by 85 publications

References 24 publications

Steel-fibre-reinforced self-compacting concrete with 100% recycled mixed aggregates suitable for structural applications

Steel-fibre-reinforced self-compacting concrete with 100% recycled mixed aggregates suitable for structural applications

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

Influence of different types of fiber on the properties of recycled aggregate concrete

Contact Info

Product

Resources

About