Rheological properties and the air content in fresh concrete for self compacting high performance concrete

Kostrzanowska–Siedlarz, Aleksandra; Gołaszewski, Jacek

doi:10.1016/j.conbuildmat.2015.07.051

Cited by 52 publications

(15 citation statements)

References 22 publications

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“…It is suggested that for the glass concrete specimens, the trend of the increased compressive strength with the increase of SP dosage, can be explained as the use of high dosage of SP causes a wider spread of the cementitious particles in the mixture [41], [42]. Similar observations were also reported in few of the previous studies [32], [41]- [43]. Therefore, the concrete containing spherical and crushed glass as a complete replacement of natural gravel could achieve a comparable strength with the normal specimens, but only if an adequate amount of water and SP dosage were used.…”

Section: Compressive Strengthsupporting

confidence: 76%

A Study of the Replacement of Natural Coarse Aggregate by Spherically-Shaped and Crushed Waste Cathode Ray Tube Glass in Concrete

Pauzi¹,

Karim²,

Jamil³

et al. 2020

JCM

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The aim of this study is to conduct an experimental investigation on the influence of complete replacement of natural coarse aggregate with spherically-shape and crushed waste cathode ray tube (CRT) glass to the aspect of workability, density, and compressive strength of the concrete. After characterizing the glass, a group of concrete mixes was prepared to contain a 40% spherical CRT glass and 60% crushed CRT glass as a complete (100%) replacement of natural coarse aggregates. From a total of 16 types of concrete mixes, the optimum proportion was selected based on its best performance. The test results showed that the use of spherical and crushed glass that possesses a smooth surface, rounded, irregular and elongated shape, and low water absorption affects the workability of concrete. Due to a higher specific gravity of crushed glass, concrete mixes containing CRT glass had a higher density compared to ordinary concrete. Despite the spherical and crushed CRT glass being stronger than gravel, the results revealed a reduction in compressive strength of the concrete. However, using a lower water to binder (w/b) ratio and a higher superplasticizer (SP) dosage, it is found to enhance the compressive strength of 60.97 MPa at 28 days that is lower by 13% than the control specimen. These findings indicate that waste CRT glass in the form of spherical and crushed could be used as an alternative of coarse aggregate that may pave the way for the disposal of hazardous e-waste.

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Section: Compressive Strengthsupporting

confidence: 76%

A Study of the Replacement of Natural Coarse Aggregate by Spherically-Shaped and Crushed Waste Cathode Ray Tube Glass in Concrete

Pauzi¹,

Karim²,

Jamil³

et al. 2020

JCM

View full text Add to dashboard Cite

show abstract

“…It was believed that the nature of changes in air content for non-air-entrained concrete mixtures mainly depend on rheological parameters. Previous experiments showed that when yield stress and plastic viscosity decrease, the diameter of slump flow increases and time of slump flow decreases, and the air content in the SCC (Self Compacting Concrete) mixture also decreases [26]. This can be used to explain the tendency of change in entrapped air content with flowability for the UHPC mixtures in this study.…”

Section: The Relationship Between Flowability and Entrapped Air Contentmentioning

confidence: 54%

Relationship between Flowability, Entrapped Air Content and Strength of UHPC Mixtures Containing Different Dosage of Steel Fiber

Wang

Gao

2016

Applied Sciences

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This study investigated the effects of different fiber contents by volume (0%, 1%, 2%, and 3%) on flowability, entrapped air content, and compressive and flexural strength of ultra high performance concrete (UHPC). Four water-to-binder ratios (0.18, 0.20, 0.22, 0.24) were used and four different dosages of superplasticizer were introduced for preparing each water-to-binder ratio mixture. The experimental results reveal that the increased content of fiber decreases the flowability and entrapped air content of fresh UHPC mixtures. The compressive strength of UHPC increased with a greater addition of steel fiber, from 1% to 3%. The flexural strength was increased slightly by the addition of 1% steel fiber and increased remarkably with the addition of 2% and 3% steel fiber. For every water-to-binder ratio mixture, with and without steel fiber, a good linear relationship can be found between compressive strength and entrapped air content. Therefore, it is suggested that lowering the entrapped air provides a significant contribution to increasing compressive strength of UHPC containing higher steel fibers.

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“…Furthermore, some of the mixes containing 75% and 100% SSA were not good enough to be self compacted, which may result in increase in air content. e study is supported by Kostrzanowska-Siedlarz and Gołaszewski [36]. ey showed that the air content of fresh high performance SCC depends on the universal components of the mix.…”

Section: E Bleeding Testmentioning

confidence: 82%

Towards Sustainable Self-Compacting Concrete: Effect of Recycled Slag Coarse Aggregate on the Fresh Properties of SCC

Qasrawi

2018

Advances in Civil Engineering

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Steel industry results in accumulation of steel slag wastes causing severe environmental problems. ese wastes can be recycled and replace natural aggregates resulting in sustainable green concrete. In this research, natural aggregates in self-compacting concrete (SCC) are replaced, wholly or partly, by steel slag coarse aggregates that were produced by crushing by-product boulders obtained from the steel industry. Fresh properties, (workability, stability, bleeding, air content, and fresh density) are the crucial ones that affect the final properties of SCC. erefore, it becomes important to evaluate the impact of SSA on the fresh properties of SCC mixes. e properties that are studied include stability, flowability, blocking, segregation, and bleeding. Furthermore, air content and fresh density are measured. In order to evaluate the impact of SSA on SCC properties, several testing methods are employed. Slump flow, V-funnel, column segregation, sieve segregation, segregation probe, U-shaped box, and VSI tests have been used in the study. e results show that it is possible to produce SCC using steel slag aggregate. Hence, green sustainable SCC can be produced. e results show that the fresh properties become sensitive for SSA replacement ratios exceeding 50%.

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Rheological properties and the air content in fresh concrete for self compacting high performance concrete

Cited by 52 publications

References 22 publications

A Study of the Replacement of Natural Coarse Aggregate by Spherically-Shaped and Crushed Waste Cathode Ray Tube Glass in Concrete

A Study of the Replacement of Natural Coarse Aggregate by Spherically-Shaped and Crushed Waste Cathode Ray Tube Glass in Concrete

Relationship between Flowability, Entrapped Air Content and Strength of UHPC Mixtures Containing Different Dosage of Steel Fiber

Towards Sustainable Self-Compacting Concrete: Effect of Recycled Slag Coarse Aggregate on the Fresh Properties of SCC

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