Location
Grand Rapids, Michigan
Start Date
14-5-2024 3:00 PM
End Date
14-5-2024 3:30 PM
Description
Nano-Modified Fly Ash-Based Geopolymer Concrete Filled CFRP Tube Composite: Mechanical Model and Life Cycle Assessment Authors Dr. Xianming Shi - United States - Washington State University Dr. Zhipeng Li - United States - Washington State University Abstract Geopolymer concrete holds immense potential as a viable alternative to ordinary portland cement (OPC) concrete; however, its application for structures has been hindered by its relatively low compressive strength and significant variability relative to conventional OPC concrete. This study investigates the utilization of carbon fiber-reinforced plastic (CFRP) tubes to confine fly ash-based geopolymer (FAGPR) concrete and its graphene oxide-modified counterpart (GFAGPR), with the aim of enhancing compressive strength and reducing the variability. Experimental investigations highlight the significant improvements in mechanical strength. Furthermore, we conducted a life cycle assessment (LCA) to assess the environmental impacts and economic costs of OPC, FAGPR, and GFAGPR concrete-filled CFRP tube composites over a 100-year service life. The LCA results indicate that (G)FAGPR composites exhibit significantly lower CO2 emissions than the OPC-tube composite. However, the OPC composite is currently the most economical among all candidates. Additionally, the admixed GO not only mitigates the environmental impacts but also reduces the cost of FAGPR-tube composite, likely due to the GO-enhanced strength of core FAGPR concrete reducing the usage of expensive CFRP tube that also features higher GWP coefficient. This work is financially supported by 2020 David C. Gross Scholarship, American Coal Ash Association Educational Foundation (ACAAEF).
Document Type
Presentation
Nano-Modified Fly Ash-Based Geopolymer Concrete Filled CFRP Tube Composite- Mechanical Model and Life Cycle Assessment
Grand Rapids, Michigan
Nano-Modified Fly Ash-Based Geopolymer Concrete Filled CFRP Tube Composite: Mechanical Model and Life Cycle Assessment Authors Dr. Xianming Shi - United States - Washington State University Dr. Zhipeng Li - United States - Washington State University Abstract Geopolymer concrete holds immense potential as a viable alternative to ordinary portland cement (OPC) concrete; however, its application for structures has been hindered by its relatively low compressive strength and significant variability relative to conventional OPC concrete. This study investigates the utilization of carbon fiber-reinforced plastic (CFRP) tubes to confine fly ash-based geopolymer (FAGPR) concrete and its graphene oxide-modified counterpart (GFAGPR), with the aim of enhancing compressive strength and reducing the variability. Experimental investigations highlight the significant improvements in mechanical strength. Furthermore, we conducted a life cycle assessment (LCA) to assess the environmental impacts and economic costs of OPC, FAGPR, and GFAGPR concrete-filled CFRP tube composites over a 100-year service life. The LCA results indicate that (G)FAGPR composites exhibit significantly lower CO2 emissions than the OPC-tube composite. However, the OPC composite is currently the most economical among all candidates. Additionally, the admixed GO not only mitigates the environmental impacts but also reduces the cost of FAGPR-tube composite, likely due to the GO-enhanced strength of core FAGPR concrete reducing the usage of expensive CFRP tube that also features higher GWP coefficient. This work is financially supported by 2020 David C. Gross Scholarship, American Coal Ash Association Educational Foundation (ACAAEF).
