Experimental investigation of cyclic behavior of zeolite cemented sand

Document Type : Research Article

Authors

1 PhD student, Islamic Azad University Science and Research branch Tehran, IRAN, ISLAMIC REPUBLIC OF

2 Assistant, Professor, Department of Civil Engineering, Science and Research Branch, Islamic Azad University

3 Assistant Professor of Department of Civil Engineering, Islamic Azad University Science and Research branch Tehran, IRAN, ISLAMIC REPUBLIC OF

4 Assistant Professor of Science and Research branch of Azad University

Abstract

The shear module is of the most crucial soil dynamic properties in seismic geotechnical engineering. The replacement of a part of cement, the production of which is one of the most important sources of CO2 emission in the world, with natural materials such as zeolite is of great importance. In the present study, the cyclic behaviour of pure sand is compared with the cyclic behaviour of sand grouted with cement and zeolite. The sand used in this research was taken from Babolsar, which is classified as a poorly graded sand based on the Unified soil classification system. The effects of the confining pressure, the shear strain and the replacement of cement by zeolite on the shear modulus are studied. All the specimens were prepared by the wet tamping method and cyclic triaxial tests were performed with three different confining pressures of 100, 200, and 300 kPa in the moderate shear strain range. The results show that Shear modulus values of the cemented sand specimens with a water-to-cement ratio of 1 are greater than that of the pure sand specimens in all ranges of shear strains. The shear modulus values increased with the replacement of cement by zeolite of cemented samples. Therefore, the replacement of cement with zeolite can be considered from an environmental point of view. By increasing the confining pressure, the shear modulus values of the pure sand, cemented sand, zeolite cemented sand specimens increased. This increase is significant for cemented and cemented zeolite specimens at a larger confining pressure range. 

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References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 12
March 2022
Pages 5441-5456

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