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Plastic shrinkage in dry mix shotcrete
2009Plastic shrinkage cracking of dry-mix shotcrete is a common problem encountered within the construction industry. Dry-mix shotcrete is used in a wide variety of applications most commonly, the repair and rehabilitation of deteriorated concrete structures.
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Study on the Effectiveness of Shrinkage Reducing Admixtures on Plastic Shrinkage of Concrete
2019Concrete is plastic for a very short time from being cast to final setting time. But even in this early age, the concrete shrinks and induces cracking. Aiming to mitigate the impact of shrinkage in concrete, shrinkage reducing admixtures can be used in concrete.
E. K. Arya +2 more
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Influence of Crumb Rubber on the Drying Shrinkage and Plastic Shrinkage Cracking of AASM
Materials Science Forum, 2013The alkali-activated slag mortar (AASM) has disadvantages of high shrinkage and therefore low crack resistance. In this paper, water quenched raw slag was used to replace sand for making AASM, and effects of crumb rubber on the drying shrinkage and plastic shrinkage cracking of AASM were investigated.
Tao Li, Ya Mei Zhang, Zheng Gui Zhu
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Concrete Plastic Shrinkage-Reduction Potential of Synergy Fibers
Transportation Research Record: Journal of the Transportation Research Board, 2001The contribution of synergy fibers to plastic shrinkage reduction of concrete was studied using cement-rich concrete, and the experimental results are reported. The fiber dosages were 0.5, 1.0, and 2.0 vol% of concrete. Three different batches of concrete were made, and 15 slabs were tested.
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Cement and Concrete Research, 2009
Fresh concrete exposed to high evaporation rates is prone to plastic shrinkage cracking, especially in structures with large surface area/volume ratios. The present work shows that the reduction of the surface tension of the mixing water is an effective way for decreasing such cracking.
José Mora-Ruacho +2 more
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Fresh concrete exposed to high evaporation rates is prone to plastic shrinkage cracking, especially in structures with large surface area/volume ratios. The present work shows that the reduction of the surface tension of the mixing water is an effective way for decreasing such cracking.
José Mora-Ruacho +2 more
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Cement and Concrete Research, 2015
Water transport in fresh, highly permeable concrete and rapid water evaporation from the concrete surface during the first few hours after placement are the key parameters influencing plastic shrinkage cracking. In this work, neutron tomography was used to determine both the water loss from the concrete surface due to evaporation and the redistribution
Mateusz Wyrzykowski +5 more
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Water transport in fresh, highly permeable concrete and rapid water evaporation from the concrete surface during the first few hours after placement are the key parameters influencing plastic shrinkage cracking. In this work, neutron tomography was used to determine both the water loss from the concrete surface due to evaporation and the redistribution
Mateusz Wyrzykowski +5 more
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Effect of Expansive Additive and Shrinkage Reducing Agent on Plastic Shrinkage of Steam-Cured Mortar
Materials Science Forum, 2018This research is part of the mortar’s plastic shrinkage study. Contents in this article is related to how the Expansive Additive (EX), Shrinkage Reducing Agent (SRA), and Fly Ash (FA) help to reduce and control the shrinkage and to compare the effectiveness of these substances used in the normal curing, i.e., at 30 °C and in the steam curing process by
Sarapon Treesuwan +2 more
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Effect of superplasticizers on the plastic shrinkage of concrete
Magazine of Concrete Research, 1992This Paper presents the results of a study on the effect of five different superplasticizers on plastic shrinkage of concrete. Test specimens of fresh concrete were subjected to a simulated hot dry environmental condition of 35°C, 50% RH and a wind velocity of 3·5mls immediately after casting.
J. G. Cabrera +2 more
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The Effectiveness of Shrinkage Reducing Admixture and Fly Ash on Plastic Shrinkage of Concrete
2020Concrete members are normally subjected to service load stresses and deformations. Even in the plastic stage, which is very short, the concrete shrinks and induces cracking. To mitigate the impact of shrinkage in concrete, Shrinkage Reducing Admixtures (SRA) and supplementary cementitious materials can be used in concrete.
Jerison Scariah James, Elson John
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PLASTIC SHRINKAGE CRACKING OF FIBER REINFORCED CONCRETE
2006The main objective of this study was to investigate the effect of fiber volume (i.e control, 0.5%, 1.0%, and 1.5%) and aspect ratios of 55, 65, and 80 of hooked-end steel fibers on the behaviour of plastic shrinkage cracking during the first few hours after mixing.
Eren, Özgür, Abdalkader, Ashraf
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