Autogenous deformation and coefficient of thermal expansion of early-age concrete: Initial outcomes of a study using a newly-developed Temperature Stress Testing Machine

2021 ◽  
pp. 103997
Author(s):  
Liang Li ◽  
Vinh Dao ◽  
Pietro Lura
Keyword(s):  
Thermal Expansion ◽  
Temperature Stress ◽  
Stress Testing ◽  
Coefficient Of Thermal Expansion ◽  
Testing Machine ◽  
Early Age ◽  
Autogenous Deformation ◽  
Early Age Concrete

scholarly journals Effect of Reinforcement on Early-Age Concrete Temperature Stress: Preliminary Experimental Investigation and Analytical Simulation

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jianda Xin ◽  
Siqing Lin ◽  
Nannan Shi ◽  
Jianshu Ouyang ◽  
Dahai Huang
Keyword(s):  
Reinforced Concrete ◽  
Temperature Stress ◽  
Testing Machine ◽  
Early Age ◽  
Principle Of Superposition ◽  
Stress Development ◽  
Concrete Crack ◽  
Analytical Simulation ◽  
Concrete Temperature ◽  
Early Age Concrete

For concrete under short-term loading, effect of reinforcement on concrete crack resistance capability is usually negligible; however, recent research results show that extension of this viewpoint to concrete under long-term loading (temperature variation) may be unsuitable. In order to investigate this phenomenon, this paper presents the experimental and analytical results of early-age reinforced concrete temperature stress development under uniaxial restraint. The experiments were carried out on a temperature stress testing machine (TSTM). Experimental results show that the coupling of reinforcement and concrete creep behavior influenced the concrete temperature stress development, and nearly 16% of concrete stress was reduced in the current research. Moreover, the cracking time of reinforced concrete was also delayed. Finally, based on the principle of superposition, analytical simulations of effect of reinforcement on concrete temperature stress have been performed.

Influence of Aggregates on Cracking Resistance of Concrete at Early Age

2012 ◽  
Vol 151 ◽  
pp. 474-479
Author(s):  
Bo Chen ◽  
Jian Tong Ding ◽  
Yue Bo Cai
Keyword(s):  
Thermal Expansion ◽  
Elastic Modulus ◽  
Stress Testing ◽  
Testing Machine ◽  
Tensile Creep ◽  
Early Age ◽  
Test Results ◽  
Cracking Resistance ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients

In order to investigate influence of aggregates on cracking resistance of concrete at early age, four kinds of aggregates, i.e. syenite, basalt, marble and sandstone, were used for the test on cracking resistance of hydraulic concretes by the temperature stress testing machine. Analogy analysis was carried out with test results of concretes with two gradings of aggregates. The results show that aggregates affect elastic modulus, thermal expansion coefficients and tensile creep behavior of concrete at early age. However, the temperature rise of concrete was slightly affected by various types and gradings of aggregate. Moreover, the cracking temperature is reliably to be used to quantitatively evaluate the influence of aggregates on cracking resistance of concrete at early age.

scholarly journals Evaluation of cracking behavior of concrete using temperature stress testing machine

2019 ◽  
Vol 304 ◽  
pp. 052104
Author(s):  
Guoxin Zhang ◽  
Jianda Xin ◽  
Zhenhong Wang ◽  
Yi Liu ◽  
Zhe Wu
Keyword(s):  
Temperature Stress ◽  
Stress Testing ◽  
Testing Machine ◽  
Cracking Behavior

A new test setup for measuring early age coefficient of thermal expansion of concrete

2019 ◽  
Vol 98 ◽  
pp. 14-28 ◽  
Author(s):  
B. Zahabizadeh ◽  
A. Edalat-Behbahani ◽  
J. Granja ◽  
J.G. Gomes ◽  
R. Faria ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Early Age ◽  
Test Setup
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