Karafan Journal

Karafan Journal

Feasibility of Stabilization of Granular Soil with Geopolymer and Nano Polymer - Laboratory and Microstructural Study

Document Type : Original Article

Authors
Department of Civil Engineering, Shahid Bahonar University, Kerman, Iran
Abstract
The use of traditional lime and cement stabilizers, in addition to environmental pollution, requires a lot of energy and natural resources for production. Therefore, in the last few decades, researchers have conducted a lot of research to introduce new materials that are compatible with the environment, and geopolymers are one of these materials. But so far, all aspects of these new adhesives have not been investigated for use in construction projects. In this research, the use of two nanoparticles of aluminum silicate and calcium silicate along with two industrial wastes of glass powder and steel slag was investigated to stabilize SM sand soil. First, the optimal amount and concentration of dry additive and alkaline solution were determined. Then, the mechanical behavior of different stabilized geopolymer samples was studied by a uniaxial compressive strength test. In this research, the effect of factors such as the type and concentration of alkaline activator, the type and percentage of nanoparticles, and the change in degree of saturation on the compressive strength and rupture strain of the samples have been investigated. SEM images were used to study the microstructure of the samples. The results of this research showed that calcium nano silicate and aluminum nano silicate reduce the strength of stabilized samples based on glass powder.Calcium nano silicate also had no effect on increasing the compressive strength of steel slag stabilized samples, but aluminum nano silicate was able to double the strength of the slag stabilized sample and also maintain its durability in saturated conditions.
Keywords
Subjects

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Volume 22, Issue 3
Technical and Engineering
Autumn 2025
Pages 314-334

  • Receive Date 19 August 2024
  • Revise Date 21 September 2024
  • Accept Date 20 October 2024