Review of Geotechnical Challenges and soil Improvement by Environmental Perspective

Population growth and industrial improvement have been engaged geotechnical engineering into bilaterally novel concerns, occurring some phenomena which are not common previously in many areas which attributed to environmental revolutions. So, the management of these environmentally phenomena needs to understand their main reasons based on ecosystem alterations. Regarding the climate changes, they could be classified into some groups. Meanwhile, some of them are more frequently occurred in arid and semi-arid land similar to Iran. Additionally, in recent decades, international agencies have presented severe limitations on greenhouse gases production and hazardous materials for ecosystem to deal with the induced environmentally concerns. For this reason, the widely usage of cement admixtures as a traditional soil stabilization method prompts geotechnical engineering to find non-toxic and environmentally innocuous alternatives for partial or full replacement by traditional cement admixtures. Different soil improvement materials and methods have been proposed such as utilization of alkali-activated cement, biological cementation, and Co2 sequestration. Obviously, each of them has their downside and upside aspects that must be investigated in details. Since, in this paper, in addition to introduce more frequent geo-environmental phenomena in arid and semi-arid land, a subset of environmentally friendly soil improvement materials and methods is also compared.

کلیدواژه ها:

Wind erosion ، Ground water withdrawal ، Geopolymer ، Biological alternatives ، Co2 sequestration