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Yield stress for zeolite-cement grouted sand
https://orcid.org/0000-0003-3248-5877
Highlights The axial yield strain in all zeolite-cement grouted specimens is less than 1%. The q ( y ) and c′y increase by increasing the Z in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. With increasing Z content, the φ′y increases with a slight slope.
Abstract Permeation grouting with cementitious materials is a widely used soil behavior improvement technique. Since the Portland cement production leads to environmental pollution and is also an energy-intensive process, replacing a part of the cement with cheaper and more environmentally friendly materials, such as zeolite, is very important. In the present study, a series of consolidated undrained triaxial tests were carried out on zeolite-cement grouted sand specimens to investigate the effect of cementation on the yield stress (q ( y )) through shear loading. The results showed that the axial yield strain (ε ( y )) in all zeolite-cement grouted sand specimens is less than 1%. Beyond the yield point (YP), a sudden increase in the strain occurs, and the stress–strain curve continues with a slight gradient. The effect of cementitious bonds is significant up to the YP and then gradually decreases. The effective stress path (ESP) of the grouted specimens rises approximately vertically up to the YP. Beyond the YP, the abrupt change of the curvature occurs and the ESP turns to the right. The q ( y ) and cohesion corresponding to the YP (c′y) increase by increasing the amount of cement replacement with zeolite (Z) in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. Therefore, the optimum Z to achieve the maximum q ( y ) and c′y is 30%. With increasing Z content, the effective internal friction angle corresponding to yield (φ′y) always increases with a slight slope.
Yield stress for zeolite-cement grouted sand
https://orcid.org/0000-0003-3248-5877
Highlights The axial yield strain in all zeolite-cement grouted specimens is less than 1%. The q ( y ) and c′y increase by increasing the Z in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. With increasing Z content, the φ′y increases with a slight slope.
Abstract Permeation grouting with cementitious materials is a widely used soil behavior improvement technique. Since the Portland cement production leads to environmental pollution and is also an energy-intensive process, replacing a part of the cement with cheaper and more environmentally friendly materials, such as zeolite, is very important. In the present study, a series of consolidated undrained triaxial tests were carried out on zeolite-cement grouted sand specimens to investigate the effect of cementation on the yield stress (q ( y )) through shear loading. The results showed that the axial yield strain (ε ( y )) in all zeolite-cement grouted sand specimens is less than 1%. Beyond the yield point (YP), a sudden increase in the strain occurs, and the stress–strain curve continues with a slight gradient. The effect of cementitious bonds is significant up to the YP and then gradually decreases. The effective stress path (ESP) of the grouted specimens rises approximately vertically up to the YP. Beyond the YP, the abrupt change of the curvature occurs and the ESP turns to the right. The q ( y ) and cohesion corresponding to the YP (c′y) increase by increasing the amount of cement replacement with zeolite (Z) in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. Therefore, the optimum Z to achieve the maximum q ( y ) and c′y is 30%. With increasing Z content, the effective internal friction angle corresponding to yield (φ′y) always increases with a slight slope.
Yield stress for zeolite-cement grouted sand
https://orcid.org/0000-0003-3248-5877
Highlights The axial yield strain in all zeolite-cement grouted specimens is less than 1%. The q ( y ) and c′y increase by increasing the Z in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. With increasing Z content, the φ′y increases with a slight slope.
Abstract Permeation grouting with cementitious materials is a widely used soil behavior improvement technique. Since the Portland cement production leads to environmental pollution and is also an energy-intensive process, replacing a part of the cement with cheaper and more environmentally friendly materials, such as zeolite, is very important. In the present study, a series of consolidated undrained triaxial tests were carried out on zeolite-cement grouted sand specimens to investigate the effect of cementation on the yield stress (q ( y )) through shear loading. The results showed that the axial yield strain (ε ( y )) in all zeolite-cement grouted sand specimens is less than 1%. Beyond the yield point (YP), a sudden increase in the strain occurs, and the stress–strain curve continues with a slight gradient. The effect of cementitious bonds is significant up to the YP and then gradually decreases. The effective stress path (ESP) of the grouted specimens rises approximately vertically up to the YP. Beyond the YP, the abrupt change of the curvature occurs and the ESP turns to the right. The q ( y ) and cohesion corresponding to the YP (c′y) increase by increasing the amount of cement replacement with zeolite (Z) in the grouted specimens up to 30%. An increase of more than 30% in Z leads to a decrease in q ( y ) and c′y. Therefore, the optimum Z to achieve the maximum q ( y ) and c′y is 30%. With increasing Z content, the effective internal friction angle corresponding to yield (φ′y) always increases with a slight slope.
Yield stress for zeolite-cement grouted sand
Jafarpour, Peyman (author) / Ziaie Moayed, Reza (author) / Kordnaeij, Afshin (author)
2020-03-01
Article (Journal)
Electronic Resource
English
Yield stress , Yield strain , Grout , Stress path , Zeolite
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