Dear colleagues
I have a question:
In interface shear studies between sand and structures such as geosynthetics or CFRP , how we can calculate or achieve initial relative density for internal and interface friction angles at critical state?
Based on which ASTM, or through which experiments.
Please let me know if you have an answer about this question.
Thank you for your kind responses.
The Rd of the sample can be checked through the sand replacement method. ( Case 1: measure for sand without adding the geosynthetics. Case 2 For interface: Uniformly mix the geosynthetics and the sand then measure Rd). Amir Mostafa Namjoo
for more detail refer to: Article Laboratory investigation of pullout behavior of hollow and s...
The initial void ratio/relative density (presumably pre-shearing) is a state paramater. The interface friction angle is a function of the soil type/geosiynthetic. The critical state friction angle is a material parameter.
Dear colleagues,
Thank you for your very informative responses.
You can find the answer to this question through the attached file.
Best regards
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