Geological behavior of sand-fines mixtures in consolidated undrained triaxial test

2021 ◽  
Author(s):  
Phong-Thanh Ngo ◽  
Vu To-Anh Phan
Keyword(s):  
Triaxial Test

scholarly journals Effect of Urease Enzyme on Shear Strength of Clay Shale

2018 ◽  
Vol 7 (4.36) ◽  
pp. 424 ◽  
Author(s):  
Maxwel Joseph Henri Nainggolan ◽  
Wiwik Rahayu ◽  
Puspita Lisdiyanti
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Triaxial Test ◽  
Clay Soil ◽  
Soil Strength ◽  
Clay Shale ◽  
Strength Performance ◽  
Enzyme Mixture ◽  
Urease Enzyme

In recent years, utilization of biotechnology in geotechnical field has rapidly grown. One of the biotechnologies being utilized is urease enzyme, a stabilization material by bio-cementation method studied in this research.  Urease enzyme is manually mixed with additional 10% of clay soil to clay shale. The objective of mixing it is to increase the bearing capacity of the clay shale. Consolidated undrained triaxial test was performed for testing the soil strength performance for samples that had undergone curing for 2, 4, and 6 weeks. The results indicated that the sample stiffens, proved by the increase of shear strength from consolidated undrained triaxial test. The shear strength value produced by the variation of the urease enzyme mixture + 10% the clay is higher than that of without the original clay shale.  

scholarly journals Dynamic Triaxial Test and Microscopic Study of Solidified Muddy Soil With Different Mixing Ratios and Curing Ages

2021 ◽  
Vol 8 ◽  
Author(s):  
Zhou Chen ◽  
Haocheng Xu ◽  
Mayao Cheng ◽  
Hanwen Lu ◽  
Zhijian Wang ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Triaxial Test ◽  
High Speed ◽  
Dynamic Strength ◽  
Dynamic Strain ◽  
Hydration Reaction ◽  
Curing Agent ◽  
Mixture Ratio ◽  
Dynamic Triaxial Test ◽  
Curing Age

Aiming to explore the optimal mixture ratio and curing age of solidified muddy soil under dynamic load, the paper intends to investigate whether the solidified muddy soil can be used as filling of high-speed railway subgrade. Based on the dynamic triaxial test, the investigation measured the dynamic strain and dynamic elastic modulus of solidified muddy soil under different mix ratios and curing ages, and also observed the microscopic morphology of solidified muddy soil samples by using scanning electron microscope. The results show that the addition of cement and curing agent significantly increases the dynamic strength and elastic modulus of muddy soil, which effectively improve the dynamic characteristics of muddy soil. The curing effect of the curing agent is more obvious with the increase of the dosage of cement and curing agent under different mix ratio. The content of curing agent plays a leading role in the hydration reaction between cement, curing agent and soil particles. Additionally, in case of the same test conditions, when the ratio of cement mass to dry silt mass is 1:20, the ratio of diluent volume to dry silt mass is 1:20, with 28 days of curing age, its curing effect will reach the best.

scholarly journals Evaluation of strength coefficients of sandy levee soils under various triaxial test conditions

2016 ◽  
Vol 2 (9) ◽  
pp. 391-396
Author(s):  
Takesh Kodaka ◽  
Ying Cui ◽  
Kyu-Tae Lee ◽  
Yoshiki Kobayashi ◽  
Yang Wu
Keyword(s):  
Triaxial Test ◽  
Test Conditions
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