Method for determining early-age frost damage of concrete by using air-permeability index and influence of early-age frost damage on concrete durability

Choi, Hyeonggil; Wen-yan, Zhang; Hama, Yukio

doi:10.1016/j.conbuildmat.2017.07.140

Cited by 47 publications

(16 citation statements)

References 14 publications

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“…Classification and general technical requirements" and other regulatory and technical documents, the indicator is classified by the grade of concrete for frost resistance. The grade is assigned based on the results of tests that imply cyclic freezing and thawing of samples saturated with water or an aqueous solution of salts, followed by determining their strength characteristics and the presence of structural defects [2].…”

Section: Methodsmentioning

confidence: 99%

Organizational-and-technological solutions to optimize the quality control of building materials

et al. 2021

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The paper presents the results of the analysis of foreign and Russian experience in the field of research and development of new methods for the accelerated determination of frost resistance of concrete, as well as a description of the experimental method for determining frost resistance by exposing the tested samples to extremely low temperatures. The development of the building materials market, the improvement of construction and installation work technologies require the use of modern high-tech technologies and means, including in the implementation of construction control at unique construction facilities. Currently used regulatory documents of the Russian Federation and standards of foreign countries imply large time costs and high labor intensity. Foreign and domestic scientific research describes other methods of testing using expensive equipment, a large amount of mathematical calculations and mathematical modeling. Reducing the time interval for testing will slightly change. The developed experimental method takes into account the requirements of the regulatory documentation in force on the territory of the Russian Federation, and implies cyclic freezing of samples saturated in a 5% aqueous solution of sodium chloride at extremely low temperatures achieved by using liquid nitrogen. Based on the results of parallel tests in accordance with the requirements of regulatory documents and in accordance with the developed experimental method, a positive convergence of the results was obtained. A significant decrease in the time of testing to determine the frost resistance of concrete was recorded, which allows concluding that it is advisable to use this experimental method, especially if it is necessary to quickly control the quality of concrete at unique construction facilities.

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Section: Methodsmentioning

confidence: 99%

Organizational-and-technological solutions to optimize the quality control of building materials

et al. 2021

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“…Zhu et al [5] evaluated the durability of recycled polymer concrete in complex environment based on freeze-thaw cycles and chloride coupling experiments. Choi et al [6] Put forward a method to determine the early frost damage of concrete by measuring the permeability change of concrete, and studied the influence of early frost damage on the durability of concrete. Alireza Habibi et al [7] evaluated the mechanical properties and durability of recycled polymer concrete via RSM method.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Concrete Durability Based on Cloud Model and D-S Evidence Theory

Yang

Huang

Qin

et al. 2022

J. Phys.: Conf. Ser.

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The environment in alpine region is complex and harsh, and the durability of concrete is seriously affected by freeze-thaw and salt invasion. In this paper, the relative dynamic modulus of elasticity, chloride permeability coefficient, mass loss rate and carbonation depth are selected as the evaluation indexes of concrete durability in Northeast China. Based on prior knowledge and expert group decision-making, the durability grade is divided and the evaluation standard is established; The evaluation model of concrete durability based on cloud model and D-S evidence theory is established. According to the engineering experimental data, the membership degree of concrete durability evaluation index in different grades is obtained through the correlation measurement of cloud model. The normalized evidence is formed and fused by D-S evidence theory. The results show that the durability grade of concrete is grade I, which is consistent with the actual project. It shows that using cloud model and evidence theory evaluation model to evaluate the durability of concrete is a new and effective method.

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“…As well as theories about frost damage, limited mathematical models and methods have been proposed to make reliable predictions of the frost resistance of cement-based materials during their lifetime [3][4][5][6]. However, while numerous investigations have focused on the frost resistance of cement-based materials [7][8][9][10][11], no previous literature has been published concerning a prediction model for a distribution map of frost resistance due to the change in pore structure.…”

Section: Introductionmentioning

confidence: 99%

Distribution Map of Frost Resistance for Cement-Based Materials Based on Pore Structure Change

Quy

Noguchi

et al. 2020

Materials

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This paper presents a prediction method and mathematical model based on experimental results for the change in pore structure of cement-based materials due to environmental conditions. It focuses on frost damage risk to cement-based materials such as mortar. Mortar specimens are prepared using water, ordinary Portland cement, and sand and the pore structure is evaluated using mercury intrusion porosimetry. New formulas are proposed to describe the relationship between the pore structure change and the modified maturity and to predict the durability factor. A quantitative prediction model is established from a modified maturity function considering the influences of environmental factors like temperature and relative humidity. With this model, the frost resistance of cement-based materials can be predicted based on weather data. Using the prediction model and climate data, a new distribution map of frost damage risk is created. It is found that summer weather significantly affects frost resistance, owing to the change in pore structure of cement-based mortar. The model provides a valuable tool for predicting frost damage risk based on weather data and is significant for further research.

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Method for determining early-age frost damage of concrete by using air-permeability index and influence of early-age frost damage on concrete durability

Cited by 47 publications

References 14 publications

Organizational-and-technological solutions to optimize the quality control of building materials

Organizational-and-technological solutions to optimize the quality control of building materials

Evaluation of Concrete Durability Based on Cloud Model and D-S Evidence Theory

Distribution Map of Frost Resistance for Cement-Based Materials Based on Pore Structure Change

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