Experimental studies and analysis on compressive strength of normal‐weight concrete at low temperatures

Xie, Jianwen; Yan, Jia‐Bao

doi:10.1002/suco.201700009

Cited by 63 publications

(11 citation statements)

References 15 publications

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“…Simple increase in secondary liner thickness cannot completely control the creep deformation in rock mass. FC-based members embedded between primary support and secondary liner can notably bear deformation pressure, thereby the high compressibility and [36,107,131,167,[194][195][196][197][198][199][200][201][202][203][204][205]. [232] was adopted in liner system of Tiefengshan No.…”

Section: Structure Membermentioning

confidence: 99%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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Foam concrete (FC) has the potential of being an alternative to ordinary concrete, as it reduces dead loads on the structure and foundation, contributes to energy conservation, and lowers the cost of production and labor cost during the construction and transportation. The paper reports a state-of-the-art review of foam concrete in terms of its components, manufacturing and material properties like drying shrinkage, compressive strength, stability and pore structure, etc. In view of the significance of the FC in engineering construction, it also includes a state-of-the-practice review of foam concrete in tunnel and underground engineering. Some shortcomings and technical limitations as well as emerging direction for performance enhancement of FC are also discussed. Current review concludes that the long-term performance and enhancement-associated properties need to be deeply investigated. This study can help alleviate consumer concerns and further encourage the wider application of FC in civil engineering.

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Section: Structure Membermentioning

confidence: 99%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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“…Drawing an analogy with plain or traditionally reinforced concrete under these conditions, an increase in compressive and tensile strength can be expected [ 53 , 54 ] along with the embrittlement of a concrete matrix [ 55 ]. Taking into account the increased tensile strength of the material, sufficient ductility to the structural element must be provided by the reinforcement once cracking occurs.…”

Section: Introductionmentioning

confidence: 99%

Effects of Low Temperatures on Flexural Strength of Macro-Synthetic Fiber Reinforced Concrete: Experimental and Numerical Investigation

Aidarov¹,

Nogales²,

Reynvart³

et al. 2022

Materials

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Fiber-reinforced concrete (FRC) is an attractive alternative to traditional steel bar-reinforced concrete structures, as evidenced by the constantly increasing market consumption of structural fibers for this purpose. In spite of significant research dedicated to FRC, less attention has been given to the effects of low temperatures on the mechanical properties of FRC, which can be critical for a variety of structural typologies and regions. With this in mind, an experimental program was carried out to assess the flexural behavior of macro-synthetic fiber-reinforced concrete (MSFRC) at different temperatures (from 20 °C to −30 °C) by means of three-point bending notched beam tests. The tested MSFRCs were produced by varying the content of polypropylene fibers (4 and 8 kg/m3). The results proved that the flexural strength capacity of all MSFRCs improved with decreasing temperature. Finite element analyses were then used to calibrate constitutive models following fib Model Code 2010 guidelines and to formulate empirical adjustments for taking into account the effects of low temperatures. The outcomes of this research are the basis for future experimental and numerical efforts meant to improve the design of MSFRCs subjected to low temperatures during service conditions.

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“…Repetition of this process leads to formation of microcracks, breakdown of wall structure, and damage to concrete or mortar . Damage to concrete due to freezing and thawing also deteriorates its mechanical properties and fracture behavior . The results of previous researches indicate that concrete elasticity modulus decreases when the number of cycles increases .…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17] Damage to concrete due to freezing and thawing also deteriorates its mechanical properties and fracture behavior. [18][19][20][21] The results of previous researches indicate that concrete elasticity modulus decreases when the number of cycles increases. 22 It is also indicated that the fracture energy of concrete after number of cycles is lower than original value before cycling.…”

Section: Introductionmentioning

confidence: 99%

Genetic prediction of cement mortar mechanical properties with different cement strength class after freezing and thawing cycles

Ghaemi‐Fard

Eskandari‐Naddaf

Ebrahimi

2018

Structural Concrete

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This study predicts the mechanical properties of cement mortars. It focuses specifically on cement strength classes of 32.5, 42.5, and 52.5 MPa, respectively. To this end, a total of 270 specimens using 54 mix designs were constructed and subjected to freezing and thawing cycles (FTCs) at −18 and 18 °C. Then, mechanical properties such as compressive and flexural strength and porosity of the specimens after 0, 50, 100, 150, and 200 cycles were obtained. Afterward, genetic expression programming (GEP) was used to predict the obtained results and to represent nonlinear relationships between the mechanical properties, freezing and thawing cycle, and cement strength class. The experimental data was used for training and testing of two GEP approach models. The results show that the strength of mortar reduces with increase in FTC. On other hand, a close correlation was observed between the predicted and experimental values when cement strength class and number of cycle were considered as independent input parameters. This fact indicates the significance of the aforementioned parameters along with the other parameters such as water to cement ratio, sand to cement ratio, and weight of cement on the accuracy of the prediction.

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Experimental studies and analysis on compressive strength of normal‐weight concrete at low temperatures

Cited by 63 publications

References 15 publications

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Effects of Low Temperatures on Flexural Strength of Macro-Synthetic Fiber Reinforced Concrete: Experimental and Numerical Investigation

Genetic prediction of cement mortar mechanical properties with different cement strength class after freezing and thawing cycles

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