Evaluation of Shear Strength of Soil Stabilized by Microbiological Method

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ZOMORRODIAN SEYED MOHAMMAD ALI; GHAFFARI HAMIDEH

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Journal: Iranian Journal of Soil and Water Research Year:2017 | Volume:48 | Issue:4 Page(s): 737-748

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Title

Evaluation of Shear Strength of Soil Stabilized by Microbiological Method

Author(s)

ZOMORRODIAN SEYED MOHAMMAD ALI | GHAFFARI HAMIDEH | Issue Writer Certificate

Keywords

Sporosarcina pasteuriiQ1

Shear StrengthQ2

Van Shear ApparatusQ1

Soil ErosionQ2

Abstract

Biogrout is a new method in soil improvement based upon microbially induced calcium carbonate precipitation (MICP). In the present study Sporosarcina pasteurii bacterium, an aerobic bacterium which exists pervasively in natural soil deposits was utilized to control Soil Erosion. The undrained Shear Strength of the soil was recorded employing an in situ miniature Van Shear Apparatus. The evaluations of Shear Strength were carried out for three types of sandy soil (Siliceous and carbonate), in four OD= 1, 1. 5, 2, 2. 5 levels, at different curing times of 3, 7, 14, 20, 28 days, and, the re-injection of the bacteria solution and cementation within the interval of 6 days. Also, the influence of environmental conditions on the performance of the bacteria and the level of Shear Strength were investigated. The results show that the Shear Strength improved with the time passed. The highest Shear Strength was obtained in the carbonate sand and fine silica sand equal to 0. 64 and 0. 39 kg/cm2 in a period of 28 days, respectively. The optimal balance between nutrients and the number of bacteria was observed at OD=1. 5. Also, the results revealed that the re-injection of the bacteria solution and cementation was more effective than only of once rejection in the Shear Strength, especially in the silica sand equal to 55% in a curing period of 28 days.

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APA: Copy

ZOMORRODIAN, SEYED MOHAMMAD ALI, & GHAFFARI, HAMIDEH. (2017). Evaluation of Shear Strength of Soil Stabilized by Microbiological Method. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 48(4 ), 737-748. SID. https://sid.ir/paper/225713/en

Vancouver: Copy

ZOMORRODIAN SEYED MOHAMMAD ALI, GHAFFARI HAMIDEH. Evaluation of Shear Strength of Soil Stabilized by Microbiological Method. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2017;48(4 ):737-748. Available from: https://sid.ir/paper/225713/en

IEEE: Copy

SEYED MOHAMMAD ALI ZOMORRODIAN, and HAMIDEH GHAFFARI, “Evaluation of Shear Strength of Soil Stabilized by Microbiological Method,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 48, no. 4 , pp. 737–748, 2017, [Online]. Available: https://sid.ir/paper/225713/en

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