Field test study on early strain development law of mass concrete in cold weather
- Release time:2024-08-09
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Affiliation of Author(s):
土木工程学院
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Journal:
Case Studies in Construction Materials
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Key Words:
Mass concrete
Winter construction
Strain law
Concrete site monitoring
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Abstract:
The early cracking of mass concrete in low temperature environment has always been a hot issue
in the industry. The exploration of the development law of temperature and strain of mass
concrete in low temperature environment is conducive to prevent its early cracking. Strain gauges
are embedded in the upper, middle, and lower layers of the four measuring points of mass concrete on site to obtain the development data of early temperature and strain. Then analyze these
data and reveal their internal laws. The following conclusions are drawn: (1) During the 0–30 h of
concrete curing monitoring, the temperature in the middle layer of concrete is the highest, followed by the temperature in the upper layer, while in the subsequent monitoring period, a
cooling gradient is formed from the lower layer to the upper layer. (2) The maximum compressive
strain of concrete mainly occurs in the middle layer, and the maximum temperature and
maximum compressive strain of concrete are positively correlated with its thickness. The ratio
value of temperature difference between inside and outside of concrete and its thickness is the key
factor affecting its external tensile strain. The strain of concrete decreases with the decrease of
temperature and the development of strength, and finally tends to be stable. (3) The thickness of
concrete has a significant effect on the complexity of the early strain development curve, but it
does not affect the time when the strain development tends to be stable. (4) The decisive factor
affecting the spatial correlation of concrete strain development is not its thickness and temperature, but the specific factors need to be further discusse
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First Author:
meiyuan
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Indexed by:
Journal paper
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ISSN No.:
2214-5095
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Translation or Not:
no
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Date of Publication:
2022-09-02
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