Analytical solutions for bleeding of concrete due to consolidation

Morris, P. H.; Dux, P. F.

doi:10.1016/j.cemconres.2010.06.007

Cited by 34 publications

(14 citation statements)

References 16 publications

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“…As for the large-strain consolidation, the Gibson consolidation theory is more effective (Gibson et al, 1967;Gibson et al, 1981;Gibson et al, 1982), and the equation solutions are primarily based on numerical solution. However, some analytical solutions have been provided under certain conditions (Xie and Leo, 2004;Morris and Dux, 2010).…”

Section: Introductionmentioning

confidence: 99%

Shallow Compaction Modeling and Upscaling: A One-Dimensional Analytical Solution and Upscaling

Zhang

Osuji

2021

Front. Earth Sci.

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Natural depositional processes frequently give rise to the heterogeneous multilayer system, which is often overlooked but essential for the simulation of a geological process. The sediments undergo the large-strain process in shallow depth and the small-strain process in deep depth. With the transform matrix and Laplace transformation, a new method of solving multilayer small-strain (Terzaghi) and large-strain (Gibson) consolidations is proposed. The results from this work match the numerical results and other analytical solutions well. According to the method of transform matrix which can consider the integral properties of multilayer consolidation, a relevant upscaling method is developed. This method is more effective than the normally used weighted average method. Correspondingly, the upscaling results indicate that the upscaled properties of a multilayer system vary in the consolidation process.

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Section: Introductionmentioning

confidence: 99%

Shallow Compaction Modeling and Upscaling: A One-Dimensional Analytical Solution and Upscaling

Zhang

Osuji

2021

Front. Earth Sci.

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“…These results suggest that parameters other than IWU may influence the resulting bleed of fly ash blends. For example, it is well known that the bleed water is the free water in the pores/channels of freshly mixed cementitious composites that cumulates at the surface during the consolidation of the cementitious matrix with time [69]. Thus, it is likely that the unexpectedly lower bleed value of the 30% fly ash-OPC blend is the result of the combination of lower water uptake (i.e., more free water and less water bound by the particles) on one hand, but restrained consolidation of the composite on the other hand (two opposite effects).…”

Section: Initial Water Uptakementioning

confidence: 99%

A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials

et al. 2021

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The decades-long use of supplementary cementitious materials (SCMs) as replacements for ordinary Portland cement (OPC) by the cement and concrete industry is undergoing a resurgence in research activities related to goals addressing circular economy activities, as well as reduction in CO2 emissions. Differences in the chemistry, mineralogy and reactivity of SCMs compared to OPC impact the fresh properties of concrete. Some SCMs exhibit greater initial water uptake and thus compete strongly with OPC for water during hydration. This study focuses on the early interaction with water as a primary factor that determines the resulting fresh properties and workability. Currently, no test (standard or otherwise) is available for quantifying initial interactions between water and cementitious materials. A quick and reliable method to measure the initial water uptake of SCMs is presented herein, which relies on their affinity to water. The method enables the calculation of water-to-binder ratios for different SCMs required to achieve the same workability as a reference OPC. The results are then well correlated to measured slump and bleed properties. We propose this simple technique to be used by researchers and industry practitioners to better predict the fresh properties of concretes, mortars, or pastes with SCMs.

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“…It will end when movement of water is blocked by some solid or due to the growth of hydration. However, excessive bleeding in freshly placed concrete results in weakening of surface layer, reduction of the bond between concrete and steel, and, finally, plastic settlement crack [6][7][8]. Bleeding makes more trouble on slabs and large areas, such as pavement, because of having large surface areas, and it causes a weakening of the top surface, making it less durable.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Void Distribution Pattern on the Strength Development between OPC-Based and Geopolymer Concrete

Nazari

Bagheri

Yadav

et al. 2019

Advances in Materials Science and Engineering

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The correlation between the void structure, as a representative of bleeding behaviour, and the strength of concrete is investigated in the current article. Early age cracking, due to dry shrinkage, can negatively influence the durability of pavement structures. Also, dry shrinkage of concrete is directly proportional to the bleeding rate. Thus, modifying the bleeding rate reduces the early cracking that happens in hardened concrete. Geopolymer concrete is presented as a suitable material for the replacement of Ordinary Portland Cement (OPC). Geopolymers have shown superior bleeding behaviour to that of OPC concrete and can be substituted for paving by means of increasing the durability. This research has used section image analysis and rebound hammer techniques to create a relationship between the void structure and the strength of concrete. Mixtures are prepared by 10% substitution of the iron-making slag to study the effects of slag on the bleeding rate. Also, the influence of water-to-binder ratio on the void structure and strength development is studied. The results indicate that the void volume has an indirect correlation to the strength development of normal concrete, while the addition of slag makes it reverse. Geopolymer concrete shows less bleeding than OPC concrete, making it a suitable alternative for pavement. It is also concluded that the replacement of slag in concrete enhances the bleeding rate and durability.

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Analytical solutions for bleeding of concrete due to consolidation

Cited by 34 publications

References 16 publications

Shallow Compaction Modeling and Upscaling: A One-Dimensional Analytical Solution and Upscaling

Shallow Compaction Modeling and Upscaling: A One-Dimensional Analytical Solution and Upscaling

A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials

A Comparative Study of Void Distribution Pattern on the Strength Development between OPC-Based and Geopolymer Concrete

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