A novel physico-mechanical parameter for estimating the mechanical strength of travertines after a freeze–thaw test

2016 ◽  
Vol 76 (1) ◽  
pp. 181-190 ◽  
Author(s):  
Amin Jamshidi ◽  
Mohammad Reza Nikudel ◽  
Mashalah Khamehchiyan
Keyword(s):  
Mechanical Strength ◽  
Mechanical Parameter ◽  
Freeze Thaw

scholarly journals Strength, Permeability, and Freeze-Thaw Durability of Pervious Concrete with Different Aggregate Sizes, Porosities, and Water-Binder Ratios

2018 ◽  
Vol 8 (8) ◽  
pp. 1217 ◽  
Author(s):  
Hanbing Liu ◽  
Guobao Luo ◽  
Haibin Wei ◽  
Han Yu
Keyword(s):  
Compressive Strength ◽  
Mechanical Strength ◽  
Aggregate Size ◽  
Pervious Concrete ◽  
High Porosity ◽  
Range Analysis ◽  
Freeze Thaw ◽  
Binder Ratio ◽  
The Impact ◽  
Water Binder Ratio

Pervious concrete (PC), as an environmental friendly material, can be very important in solving urban problems and mitigating the impact of climate change; i.e., flooding, urban heat island phenomena, and groundwater decline. The objective of this research is to evaluate the strength, permeability, and freeze-thaw durability of PC with different aggregate sizes, porosities, and water-binder ratios. The orthogonal experiment method is employed in the study and nine experiments are conducted. The compressive strength, flexural strength, permeability coefficient, porosity, density, and freeze-thaw durability of PC mixtures are tested. Range analysis and variance analysis are carried out to analyze the collected data and estimate the influence of aggregate size, porosity, and water-binder ratio on PC properties. The results indicate that porosity is the most important factor determining the properties of PC. High porosity results in better permeability, but negatively affects the mechanical strength and freeze-thaw durability. PC of 15% porosity can obtain high compressive strength in excess of 20 MPa and favorable freeze-thaw durability of 80 cycles without sacrificing excessive permeability. Aggregate size also has a significant effect on freeze-thaw durability and mechanical strength. Small aggregate size is advantageous for PC properties. PC with 4.75–9.5 mm coarse aggregate presents excellent freeze-thaw durability. The influence of the water-binder ratio on PC properties is not as significant as that of aggregate size and porosity. An optimal mix ratio is required to trade-off between permeability, mechanical strength, and freeze-thaw durability.

scholarly journals Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils

2019 ◽  
Vol 21 ◽  
pp. 100281 ◽  
Author(s):  
Thi Thanh Hang Nguyen ◽  
Yu-Jun Cui ◽  
Valéry Ferber ◽  
Gontran Herrier ◽  
Tamer Ozturk ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Freeze Thaw ◽  
Fine Grained

scholarly journals Effect of Freeze-Thaw Cycle on Shear Strength of Lime-Solidified Dispersion Soils

2020 ◽  
Vol 6 (1) ◽  
pp. 114-129 ◽  
Author(s):  
Meng Yao ◽  
Qing Wang ◽  
Bing Ma ◽  
Yaowu Liu ◽  
Qingbo Yu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Mechanical Strength ◽  
Saline Soil ◽  
Mechanical Analysis ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Freeze Thaw ◽  
Sem Image ◽  
Thaw Cycle ◽  
Freeze Thaw Cycle

The freeze-thaw cycle of saline soil in the seasonal frozen area will produce diseases such as frost heave and thaw settlement, road frost boiling, collapse and uneven settlement. In order to reduce the occurrence of these undesirable phenomena, it is often necessary to improve the saline soil in engineering. In this paper, the typical carbonate saline soil in the west of Jilin Province, China is taken as the research object. By adding different content of lime (0%, 3%, 6%, 9%, 12%, 15%), the change of mechanical strength of lime solidified saline soil under different freeze-thaw cycles (0, 1, 3, 6, 10, 30, 60 times) is studied. The mechanical analysis is carried out by combining particle size analysis test and SEM image. The test results show that although repeated freeze-thaw cycles make the soil structure loose and the mechanical strength greatly reduced, the soil particles agglomerate obviously after adding lime, its dispersion is restrained by the flocculation of clay colloid, and the shear strength of soil is improved by the increase of the cohesive force between clay particles, and the optimal lime mixing ratio of the saline soil in this area is 9%.

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