Effect of aggregate and cementitious material on properties of lightweight self-consolidating concrete for prestressed members

Floyd, Royce W.; Hale, William; Bymaster, Jared C.

doi:10.1016/j.conbuildmat.2015.03.084

Cited by 16 publications

(9 citation statements)

References 6 publications

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“…The fresh properties of LWSCC with Type III cement can be improved by partially replacing binder with fly ash as shown in their study. Floyd et al (2015) stated that LWSCC with expanded shale exhibited better fresh properties compared to expanded clay with the same amount of other mixture content which agreed with the findings of Lotfy et al (2015a). Also, the authors changed the coarse aggregates distribution in their study by limiting the maximum aggregate size to 12.5mm.…”

Section: Lwscc Workability Criteriasupporting

confidence: 69%

“…A comprehensive study of LWSCC was done by Floyd et al (2015) on the effect of cementitious material and aggregate type on the workability of LWSCC. Two types of aggregates, which are expanded clay and expanded shale, were studied by them.…”

Section: Lwscc Workability Criteriamentioning

confidence: 99%

“…A comprehensive study was done by Floyd et al (2015) to investigate the effect of cementitious material and aggregates type on the properties of LWSCC. The LWSCC with expanded clay were found to fail around the aggregate particle while LWSCC with expanded shale failed with the fracture of individual particles.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…The authors explained that the smooth surface of expanded shale aggregates had caused poor bonding between the aggregates and cement mortar. From the failure mode of LWSCC with expanded clay, Floyd et al (2015) concluded that the compressive strength of LWSCC is greatly influenced by the strength of LWA. The authors also found that water to binder ratio has less significant effect on compressive strength of LWSCC designed with high cement content in their particular research.…”

Section: Compressive Strengthmentioning

confidence: 99%

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Recent development and perspective of lightweight aggregates based self-compacting concrete

Ting

Rahman

Lau

et al. 2019

Construction and Building Materials

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The utilization of natural and artificial lightweight aggregates in lightweight self-compacting concrete (LWSCC) is gaining popularity in research field. Extensive research has been carried out in the past decade all over the world to utilize lightweight aggregates (LWA) in selfcompacting concrete (SCC). LWSCC, which uses renewable aggregates, has great potential to become an alternative material to conventional concrete. The paper is aimed to review the more recent research of physical properties of lightweight aggregates used in developing mix design of lightweight self-compacting concrete. In design, the mix proportion of LWSCC is a crucial factor to achieve the desired fresh and hardened concrete properties. The methods to develop LWSCC mix design with anticipated fresh and hardened concrete are reviewed. Research shows that the mix design LWSCC is preferably proportioned by aggregates packing concept. In addition, discussion on the fresh and hardened concrete properties is made and summarized in this paper. Studies indicate that there is a promising future for the use of lightweight aggregates in SCC as it shows satisfactory filling ability, passing ability, segregation resistance and compressive strength. Research gaps recommendations are then identified through this review to further discover lightweight self-compacting concrete in several aspects, particularly in term of sustainability.

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Section: Lwscc Workability Criteriasupporting

confidence: 69%

Section: Lwscc Workability Criteriamentioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 99%

See 2 more Smart Citations

Recent development and perspective of lightweight aggregates based self-compacting concrete

Ting

Rahman

Lau

et al. 2019

Construction and Building Materials

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“…In recent decades, significant efforts have been focused on the use of lightweight concrete (LWC) in the construction industry, especially for prefabricated structural components. The lower weight of LWC results in easier erection and reduces the dead loads on the structure, both leading to improved economy 7,8 . In buildings, the use of LWC can also improve the energy efficiency because LWC possesses greater thermal insulation capabilities 9 .…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of lightweight concrete beams reinforced with GFRP bars and prestressed with steel strands

Omrani

Dehestani

Yousefpour

2020

Structural Concrete

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The present research is focused on developing efficient, durable flexural members by combining the use of lightweight concrete (LWC), fiber‐reinforced polymer (FRP) bars, and prestressing. The use of LWC reduces the structural weight while providing suitable thermal insulation whereas using FRP bars instead of steel reinforcement provides corrosion resistance, light weight, high tensile strength, and fatigue resistance. Both materials possess smaller moduli of elasticity compared to those in materials within conventional construction, which may cause large deflections and excessive crack widths that are addressed via prestressing. Six LWC beam specimens were fabricated and tested, all of which contained FRP bars. Two specimens were not prestressed, one in under‐reinforced and the other in over‐reinforced conditions. The other four specimens contained different configurations of prestressing steel in addition to FRP bars. The experimental results were used to validate nonlinear finite element models in Abaqus. Results showed that of a prestress level of 6 MPa in concrete reduced the beam deflection at failure by 28% and increased the cracking load by three times. Therefore, a relatively small prestress level could compensate for the increase in deflection and possible cracking, which shows the merits of this combination in providing an optimal solution for the structural members of the future.

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Use of polymeric fibers to improve the mechanical properties and impact resistance of lightweight SCC

Omar

Hassan

2019

Construction and Building Materials

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Effect of aggregate and cementitious material on properties of lightweight self-consolidating concrete for prestressed members

Cited by 16 publications

References 6 publications

Recent development and perspective of lightweight aggregates based self-compacting concrete

Recent development and perspective of lightweight aggregates based self-compacting concrete

Flexural behavior of lightweight concrete beams reinforced with GFRP bars and prestressed with steel strands

Use of polymeric fibers to improve the mechanical properties and impact resistance of lightweight SCC

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