Evaluation of interlayer shear strength

1986 ◽  
Vol 21 (4) ◽  
pp. 511-515 ◽  
Author(s):  
V. V. Mikhailov ◽  
G. M. Gunyaev ◽  
L. A. Ivanova ◽  
M. A. Kuznetsova
Keyword(s):  
Shear Strength ◽  
Interlayer Shear ◽  
Interlayer Shear Strength

Validation of the Louisiana Interlayer Shear Strength Test for Tack Coat

2018 ◽  
Author(s):  
Louay N. Mohammad ◽  
Mostafa A. Elseifi ◽  
Ramendra Das ◽  
Wei Cao ◽  
◽  
...  
Keyword(s):  
Shear Strength ◽  
Strength Test ◽  
Shear Strength Test ◽  
Interlayer Shear ◽  
Tack Coat ◽  
Interlayer Shear Strength

Validation of the Louisiana Interlayer Shear Strength Test for Tack Coat

2018 ◽  
Author(s):  
Louay N. Mohammad ◽  
Mostafa A. Elseifi ◽  
Ramendra Das ◽  
Wei Cao ◽  
◽  
...  
Keyword(s):  
Shear Strength ◽  
Strength Test ◽  
Shear Strength Test ◽  
Interlayer Shear ◽  
Tack Coat ◽  
Interlayer Shear Strength

The In Situ Shear Strength of Roller Compacted Concrete in the Dam of Jinghong Hydropower Station

2012 ◽  
Vol 430-432 ◽  
pp. 968-973
Author(s):  
Jian Bin Xie ◽  
Jing Fan ◽  
Tian Chun He ◽  
Chun Feng Tang
Keyword(s):  
Shear Strength ◽  
Friction Coefficient ◽  
Raw Materials ◽  
Limestone Powder ◽  
Hydropower Station ◽  
Roller Compacted Concrete ◽  
Interlayer Shear ◽  
Study Results ◽  
Interlayer Shear Strength

For roller compacted concrete with the admixtures of grinding limestone powder and water quenched iron slag powder (shortly called double admixture RCC) in dam of Jinghong Hydropower station, the raw materials and the mix proportion of the RCC were studied. Then one experiment on in situ shear strength are carried out between hot rise layer and cold rise layer at the altitude of 573.3 meters of RCC in dam block 23 based on the flat push-situ shear test program. The shear strength indexes of hot rise layer and cold rise layer in RCC for Jinghong Hydropower Station are tested by the experiment subsequently. The study results show that the index for interlayer shear strength of the cold rise layer of RCC with 90 days ages in dam are the friction coefficient of 1.12, and the cohesion of 1.22 MPa. The index for interlayer shear strength of the hot rise layer of RCC with 90 days ages in dam are the friction coefficient of 1.32, and the cohesion of 1.24 MPa. The study results also show that the construction processes meet the requirements of the RCC construction and the integrity of hot rise layer of RCC in the dam is better.

Factors Affecting the Interlayer Shear Strength of Laboratory and Field Samples

2020 ◽  
pp. 036119812097541
Author(s):  
Abu Ahmed Sufian ◽  
Dan Swiertz ◽  
Hussain U. Bahia ◽  
Louay Mohammad ◽  
Moses Akentuna
Keyword(s):  
Shear Strength ◽  
Field Study ◽  
Laboratory Study ◽  
Application Rate ◽  
Study Phase ◽  
Asphalt Emulsion ◽  
Interlayer Shear ◽  
Field Samples ◽  
Tack Coat ◽  
Interlayer Shear Strength

Asphalt emulsion is the most widely used tack coat material in the U.S. The objective of this study is to investigate factors that may affect the interlayer bond shear strength of asphalt emulsion tack coats of both laboratory and field compacted samples. The laboratory study included six types of tack coat materials applied on two surfaces with two residual application rates. The field study phase involved validation of the interlayer shear performance findings using field cores extracted from paving projects. The field study included taking cores of the existing layer, emulsions used for interlayer bonding, and loose mixes of new asphalt layers. Materials were collected to produce the laboratory prepared specimens for comparison with the field cores. Results of the laboratory study demonstrate that there is a direct relationship between the roughness (texture) of the existing surface and the interlayer shear strength (ISS) between two surfaces. Statistical analysis provided a strong correlation and indicated that 79% of the data variance can be explained with surface texture, emulsion type, application rate, and replicate effects. Comparing field cores with laboratory produced samples showed no clear relationship between the shear strength of laboratory and field specimens. It is speculated that the difference in compaction of the upper layers in the laboratory and field, and effect of shearing during coring of the samples from the field, resulted in higher laboratory shear values relative to field core values. The study highlights major challenges in using laboratory prepared samples to predict field behavior of tack coats.

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