Assessing the efficiency of entrained air voids for freeze-thaw durability through modeling

Mayercsik, Nathan P.; Vandamme, Matthieu; Kurtis, Kimberly E.

doi:10.1016/j.cemconres.2016.06.004

Cited by 92 publications

(33 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This critical degree of saturation was approximately 86% saturation. Since the time of this research, this value has been observed to vary depending upon the quality of the air void system with systems having poorer air void spacing having a value closer to 80% (Mayercsik, Vandamme, & Kurtis, 2016). A model was extended from that of Fagerlund to predict the time to reach critical saturation.…”

Section: Findings Of Spr-3200mentioning

confidence: 99%

Synthesis: Accelerating Implementation of Research Findings to Reduce Potential Concrete Pavement Joint Deterioration

Weiss¹,

Olek²,

Whiting³

et al. 2019

View full text Add to dashboard Cite

JOINT TRANSPORTATION RESEARCH PROGRAMThe Joint Transportation Research Program serves as a vehicle for INDOT collaboration with higher education institutions and industry in Indiana to facilitate innovation that results in continuous improvement in the planning, design, construction, operation, management and economic efficiency of the Indiana transportation infrastructure. AbstractDistress has recently been observed in the joints of some concrete pavements, primarily in the wet-freeze states. This distress often begins in longitudinal joints, followed by transverse joints and results in the significant loss of material from the joint area. Although it may only affect approximately 10% of the concrete pavements system-wide, it greatly reduces the service life and increases maintenance costs of the pavements it effects. Primary issues that emerged from studies on this phenomenon include the importance of the timing of joint sawing, the width of the joint opening, degree of concrete or joint sealing, drainage and degree of saturation of the concrete at the joint, quality of the air void system, role of deicing chemicals, quality of curing, and the degree of restraint at the joint. Although this broad collection of issues implies that we still lack complete understanding of all causes of joint deterioration, it also makes it pretty clear that the observed damage is a result of combination of several factors. This study synthesizes completed research related to concrete pavements joint deterioration and provides information to advance the knowledge and understanding of the variables involved in in this deterioration process and suggests the best practices that can lead to its reduction or mitigation. 17.

show abstract

Section: Findings Of Spr-3200mentioning

confidence: 99%

Synthesis: Accelerating Implementation of Research Findings to Reduce Potential Concrete Pavement Joint Deterioration

Weiss¹,

Olek²,

Whiting³

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These pores are larger than the capillary pores, and they will hereafter be referred to as air pores and categorized as pores larger than 10 μm, as is commonly done in the literature (e.g. Fagerlund 1993Fagerlund , 2004Mayercsik et al 2016). The gel pores and capillary pores are basically a product of the chemical reactions between cement and water during the hardening of concrete (Jennings et al 2008), while the air pores are normally caused either by unintended entrapped air in the concrete during mixing or by an air entrainment agent added to the mix in order to create artificial air pores, for example to improve the frost resistance.…”

Section: Absorption Of Water In Air-entrained Concretementioning

confidence: 99%

A Hygro-Thermo-Mechanical Multiphase Model for Long-Term Water Absorption into Air-Entrained Concrete

2018

View full text Add to dashboard Cite

Many concrete structures located in cold climates and in contact with free water are cast with air-entrained concrete. The presence of air pores significantly affects the absorption of water into the concrete, and it may take decades before these are fully saturated. This generally improves the long-term performance of such structures and in particular their frost resistance. To study the long-term moisture conditions in air-entrained concrete, a hygrothermo-mechanical multiphase model is presented, where the rate of filling of air pores with water is described as a separate diffusion process. The driving potential is the concentration of dissolved air, obtained using an averaging procedure with the air pore size distribution as the weighting function. The model is derived using the thermodynamically constrained averaging theory as a starting point. Two examples are presented to demonstrate the capabilities and performance of the proposed model. These show that the model is capable of describing the complete absorption process of water in air-entrained concrete and yields results that comply with laboratory and in situ measurements. Keywords Air-entrained concrete • Multiphase model • Long-term absorption • Diffusion • Pore size distribution The research presented was carried out as a part of Swedish Hydropower Centre-SVC. SVC has been established by the Swedish Energy Agency, Energiforsk and Svenska Kraftnät together with

show abstract

“…Air bubbles must remain stable so that they could be preserved in the fresh concrete and maintain a certain amount in solid concrete [23]. It has been reported that assuring appropriate number, spacing, and distribution of tiny entrained air bubbles in concrete can significantly affect the mechanical properties of concrete [24][25][26][27][28] and is critical for solving the destruction of freeze-thaw cycles [14,29,30]. This is because the distance the freezing water travels to the nearest air void is shortened [31].…”

Section: Introductionmentioning

confidence: 99%

A Review on Bubble Stability in Fresh Concrete: Mechanisms and Main Factors

et al. 2020

View full text Add to dashboard Cite

In order to improve the stability of air bubbles in fresh concrete, it is of great significance to have a better understanding of the mechanisms and main influencing factors of bubble stability. In the present review, the formation and collapse process of air bubbles in fresh concrete are essentially detailed; and the advances of major influencing factors of bubble stability are summarized. The results show that the surface tension of air–liquid interface exerts a huge impact on bubble stability by reducing surface free energy and Plateau drainage, as well as increasing the Gibbs surface elasticity. However, surface tension may not be the only determinant of bubble stability. Both the strength of bubble film and the diffusion rate of air through the membrane may also dominate bubble stability. The application of nano-silica is a current trend and plays a key role in ameliorating bubble stability. The foam stability could be increased by 6 times when the mass fraction of nano-particle reached 1.5%.

show abstract

Assessing the efficiency of entrained air voids for freeze-thaw durability through modeling

Cited by 92 publications

References 21 publications

Synthesis: Accelerating Implementation of Research Findings to Reduce Potential Concrete Pavement Joint Deterioration

Synthesis: Accelerating Implementation of Research Findings to Reduce Potential Concrete Pavement Joint Deterioration

A Hygro-Thermo-Mechanical Multiphase Model for Long-Term Water Absorption into Air-Entrained Concrete

A Review on Bubble Stability in Fresh Concrete: Mechanisms and Main Factors

Contact Info

Product

Resources

About