Effect of Temperature and Aging on the Relationship Between Dynamic and Static Elastic Modulus of Concrete

Title & Authors
Effect of Temperature and Aging on the Relationship Between Dynamic and Static Elastic Modulus of Concrete
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Abstract
This paper investigates the relationships between dynamic elastic modulus and static elastic modulus or compressive strength according to curing temperature, aging, and cement type. Based on this investigation, the new model of the relationships we proposed. Impact echo method estimates the resonant frequency of specimens and uniaxial compression test measures the static elastic modulus and compressive strength. Type I and V cement concretes, which have the water-cement ratios of 0.40 and 0.50, are cured under the isothermal curing temperatures of 10, 23, and 50$\small{\^{C}}$ Cement type and aging have no large influence on the relationship between dynamic and static elastic modulus, but the ratio of dynamic and static elastic modulus comes close to 1 as temperature increases. Initial chord elastic modulus which is calculated at lower strain level of stress-strain curve, has the similar value to dynamic elastic modulus. The relationship between dynamic elastic modulus and compressive strength has the same tendency as the relationship between dynamic and static elastic modulus according to cement type, temperature and aging. The proposcd relationship equations between dynamic elastic modulus and static elastic modulus or compressive strength properly estimates the variation of relationships according to cement type md temperature.
Keywords
elastic modulus;compressive strength;impact echo method;temperature;aging;
Language
Korean
Cited by
1.
웨이블릿 해석을 이용한 콘크리트의 동탄성계수 추정 및 응용,정범석;

한국콘크리트학회논문집, 2010. vol.22. 6, pp.843-850
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