Experimental study of strength and deformation of plain concrete under biaxial compression after freezing and thawing cycles

2006 ◽  
Vol 36 (10) ◽  
pp. 1857-1864 ◽  
Author(s):  
H.S. Shang ◽  
Y.P. Song
Keyword(s):  
Experimental Study ◽  
Plain Concrete ◽  
Biaxial Compression ◽  
Freezing And Thawing ◽  
Strength And Deformation ◽  
Freezing And Thawing Cycles

Engineering properties of rubberized concrete

1992 ◽  
Vol 19 (5) ◽  
pp. 912-923 ◽  
Author(s):  
Neil N. Eldin ◽  
Ahmed B. Senouci
Keyword(s):  
Plain Concrete ◽  
Crumb Rubber ◽  
Engineering Properties ◽  
Unit Weight ◽  
Rubberized Concrete ◽  
Portland Cement Concrete ◽  
Freezing And Thawing ◽  
Scrap Tire ◽  
Plastic Energy ◽  
Freezing And Thawing Cycles

Growing piles of discarded tires are potential sources of fire and health hazards. The current disposal methods are wasteful and costly. As a possible solution to the problem of scrap-tire disposal, an experimental study was conducted to examine the potential use of rubber aggregate (tire chips and crumb rubber) as mineral aggregate substitute in Portland cement concrete mixes. The research focused on determining the strength characteristics of rubberized concrete and examined the relationship between the size, percentage, and shape of rubber aggregate and the strength measured.Rubberized concrete was found to possess good esthetics, acceptable workability, and a smaller unit weight than plain concrete. However, it exhibited low compressive and tensile strengths and lower resistance to repeated freezing and thawing cycles than that of plain concrete. A statistical analysis of the experimental data suggested that only the percentage by volume of rubber in the mix has a significant effect on strength. The size and shape was found insignificant. Unlike plain concrete, rubberized concrete did not demonstrate the typical brittle failure. It exhibited a ductile, plastic failure, and showed the ability to absorb a large amount of plastic energy under compressive and tensile loads. Key words: rubberized concrete, concrete properties, compression, durability, failure, modulus of elasticity, slump, tension, toughness, workability.

Experimental Study on Frost Resistance of Concrete in Seawater

2014 ◽  
Vol 507 ◽  
pp. 254-257 ◽  
Author(s):  
Li Kun Qin ◽  
Ling Xia Gao ◽  
Hong Wei Song ◽  
Xiu Wei Wang
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Peak Stress ◽  
Test System ◽  
Freezing And Thawing ◽  
Dynamic Triaxial Test ◽  
Mathematical Expressions ◽  
Stress Point ◽  
Freezing And Thawing Cycles ◽  
Fast Freezing

The experiments of concrete in seawater under 0, 25, 50, 75 and 100 freezing-thawing cycles were performed using fast freezing and thawing method. Appling large concrete static and dynamic triaxial test system, the influence of freezing and thawing cycles on compressive strength and strain at peak stress point of concrete in seawater were detected, and then simple mathematical expressions were established.

scholarly journals Experimental Study on Crack Development of Rock Specimens by Freezing and Thawing Cycles

2000 ◽  
Vol 40 (2) ◽  
pp. 41-48 ◽  
Author(s):  
Tian Cheng Chen ◽  
Noriyasu Mori ◽  
Teruyuki Suzuki ◽  
Hitoshi Shoji ◽  
Takashi Goto
Keyword(s):  
Experimental Study ◽  
Crack Development ◽  
Freezing And Thawing ◽  
Freezing And Thawing Cycles ◽  
Rock Specimens

Study on Influence of Freeze-Thaw for Chlorion Penetration

2014 ◽  
Vol 578-579 ◽  
pp. 1295-1298
Author(s):  
Zhen Qiang Wang ◽  
Ya Na Zhang ◽  
Yan Liu
Keyword(s):  
Concrete Strength ◽  
Chloride Ion ◽  
Plain Concrete ◽  
Freezing And Thawing ◽  
Freeze Thaw ◽  
Chloride Diffusivity ◽  
Chloride Ion Penetration ◽  
Freezing And Thawing Cycles ◽  
Relationship Of ◽  
The Relationship

Freeze-thaw cycles can affect the chloride diffusivity of concrete to a certain extend. The experimental study of plain concrete specimens with different strength grade were carried out, suffering 0, 50, 100 and 150 cycles of freeze-thaw. Chloride ion penetration under different strength, different cycle-index and the concrete mass-loss caused by freeze-thaw cycles are analyzed. Using this method the relationship of chlorion permeability with concrete strength is established when the concrete specimens reach to a particular value of freezing and thawing cycles.

scholarly journals Experimental study of σ - ε diagrams of concrete under uniaxial compression and the influence of freezing and thawing cycles on the form of the diagrams

2020 ◽  
Vol 17 (4) ◽  
pp. 80-88
Author(s):  
V. M. Popov ◽  
◽  
M. G. Plyusnin ◽  
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Uniaxial Compression ◽  
Reinforced Concrete Structures ◽  
Deformation Characteristics ◽  
Freezing And Thawing ◽  
Coefficients Of Variation ◽  
Initial Modulus ◽  
Compressive Strength Of Concrete ◽  
Freezing And Thawing Cycles

As a result of the experimental study, there was estimated the variability of the form of complete diagrams σ-ε of concrete under uniaxial compression. It is shown that the coefficients of variation of concrete deformation characteristics are comparable with the coefficient of variation of strength within one concrete class in terms of compressive strength. It was found out that the effect of freezing and thawing cycles leads not only to a decrease in the compressive strength of concrete, but also to a decrease in the ultimate deformations and the initial modulus of elasticity. Thus, when using diagram methods for calculating reinforced concrete structures, it is necessary to take into account the influence of variability not only in the strength, but also in the deformation characteristics of concrete.

Study of Frost Resistance on Air-Entrained Concrete in Sulfated Medium

2006 ◽  
Vol 302-303 ◽  
pp. 125-130 ◽  
Author(s):  
Ge Yong ◽  
Yuan Jie ◽  
Wen Cui Yang ◽  
Bao Sheng Zhang
Keyword(s):  
Fresh Water ◽  
Frost Resistance ◽  
Plain Concrete ◽  
Sulfate Solution ◽  
Test Results ◽  
Freezing And Thawing ◽  
Freeze Thaw ◽  
Freezing And Thawing Cycles ◽  
Air Entrained Concrete ◽  
Sodium Solution

Frost resistance of plain concrete and air-entrained concrete subjected to freeze-thaw cycles in fresh water and 5 % and 7 % sodium sulfate solution are investigated in this paper. The test results show that the frost resistance of concrete is different in the different medium. The properties of concrete frozen in 5 % and 7 % sodium solution are different from that in fresh water, and entraining air into concrete properly can increase the frost resistance significantly whether in fresh water or in sulfate solution. Higher strength concrete could resist the degradation of freezing and thawing cycles in water, but some of them failed suddenly in midspan of specimens under the sulfate solution.

Mechanics Characteristics and Failure Criteria of Concrete Confined by Lateral Stress after Suffering Cycles of Freezing and Thawing in Seawater

2007 ◽  
Vol 334-335 ◽  
pp. 245-248
Author(s):  
Li Kun Qin ◽  
Hao Ran Chen ◽  
Yu Jie Wang ◽  
Dong Fu Zhao ◽  
Jia Wei Yao
Keyword(s):  
Plain Concrete ◽  
Failure Criteria ◽  
Test System ◽  
Lateral Stress ◽  
Freezing And Thawing ◽  
Offshore Area ◽  
Combined Loads ◽  
University Of Technology ◽  
Strength And Deformation ◽  
Mechanics Characteristics

Biaxial compressive tests of plain concrete specimens suffering 0、25、50 and 75 cycles of freezing and thawing respectively in 3.5% sodium chloride solution imitated seawater were completed under four lateral constant stress rates. The tests were completed by using the large static-dynamic triaxial test system for concrete in the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The biaxial compressive strength and deformation characteristics of concrete confined by lateral stress after suffering corrosive cycles of freezing and thawing were studied in a systematic way. On the basis of the tests, the failure criterion of concrete subjected to constant lateral compressive stress after suffering corrosive cycles of freezing and thawing was established in the stress-strain system. The conclusions can provide the testing and theoretical basis for deeper study of the concrete construction subjected to biaxial compressive combined loads in northern cold region or influenced by corrosive cycles of freezing and thawing nearby the coastal and offshore area.

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