Laboratory Assessment for Utilizing Eggshell Waste on Iowa Soil Stabilization

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Yang, Bo
Yin, Zexi
Kim, Sunghwan
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American Society of Civil Engineers
Ceylan, Halil
Professor Professor
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Civil, Construction and Environmental Engineering

The Department of Civil, Construction, and Environmental Engineering seeks to apply knowledge of the laws, forces, and materials of nature to the construction, planning, design, and maintenance of public and private facilities. The Civil Engineering option focuses on transportation systems, bridges, roads, water systems and dams, pollution control, etc. The Construction Engineering option focuses on construction project engineering, design, management, etc.

The Department of Civil Engineering was founded in 1889. In 1987 it changed its name to the Department of Civil and Construction Engineering. In 2003 it changed its name to the Department of Civil, Construction and Environmental Engineering.

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  • Department of Civil Engineering (1889-1987)
  • Department of Civil and Construction Engineering (1987-2003)
  • Department of Civil, Construction and Environmental Engineering (2003–present)

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Institute for Transportation
InTrans administers 14 centers and programs, and several other distinct research specialties, and a variety of technology transfer and professional education initiatives. More than 100 Iowa State University faculty and staff work at InTrans, and from 200 to 250 student assistants from several ISU departments conduct research while working closely with university faculty. InTrans began in 1983 as a technical assistance program for Iowa’s rural transportation agencies.
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Iowa has become the number one state in America in egg production in the past several years. Consequently, large amounts of eggshells are generated as unused wastes. Eggshell is made almost entirely of calcium carbonate crystals. Due to the rich calcium in eggshells, it has the great potential to be used as a calcium-based stabilizer material. However, such benefits of eggshells have not been evaluated and practiced in Iowa yet. This study aims to assess the beneficial use of Iowa eggshells as bio-based cementitious materials in stabilizing Iowa subgrade soils. Eggshells were ground into eggshell powder (ESP) through a coffee grinder. The testing results indicated that ESP treatment could elevate the plasticity of soil as well as the strength. The optimum content of ESP is 8%, which can achieve up to 30% strength improvement. The outcomes of this study indicate that ESP could be used as a non-traditional additive for Iowa soil stabilization.
This is a manuscript of the proceedings Published as Yang, Bo, Zexi Yin, Halil Ceylan, and Sunghwan Kim. "Laboratory Assessment for Utilizing Eggshell Waste on Iowa Soil Stabilization." In Geo-Congress 2024, pp. 432-441. doi: © 2024 American Society of Civil Engineers. Posted with Permission. This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at