A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sustainable Concretes for Structural Applications
For the production of a high-performance concrete (HPC) matrix, a large amount of binder is normally used. The production of ordinary Portland cement (OPC) as the binder of concrete accounts for 7% of CO2 emission, which has notable environmental impacts, and subsequently results in unsustainable concrete. The aim of the present study was to investigate the effect of replacing OPC with calcium sulfoaluminate cement (CSA) or ground granulated blast-furnace slag (GGBS) as sustainable binders on the engineering properties of HPC. Additionally, the effect of introducing double hooked-end (DHE) steel fibers at a fiber volume fraction of 1% on the properties of HPC was assessed. The compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity of HPC were evaluated. Moreover, a scanning electron microscopy (SEM) method was used to study the microstructure of the concretes. The results indicate that the replacement of OPC with CSA cement results in an improvement in the mechanical properties of HPC particularly at later ages of curing, while combination CSA cement with OPC and GGBS in the binary and ternary systems degrades the concrete’s strengths. The addition of 1% DHE steel fibers significantly increased the engineering properties of concrete. The results show that the bond between a cement matrix and steel fibers has been enhanced due to the expansive behavior of CSA cement. The SEM observation also shows the significant influence of CSA cement on the microstructure of concrete by forming a rich amount of ettringite which subsequently results in an improvement in the properties of concrete.
Sustainable Concretes for Structural Applications
For the production of a high-performance concrete (HPC) matrix, a large amount of binder is normally used. The production of ordinary Portland cement (OPC) as the binder of concrete accounts for 7% of CO2 emission, which has notable environmental impacts, and subsequently results in unsustainable concrete. The aim of the present study was to investigate the effect of replacing OPC with calcium sulfoaluminate cement (CSA) or ground granulated blast-furnace slag (GGBS) as sustainable binders on the engineering properties of HPC. Additionally, the effect of introducing double hooked-end (DHE) steel fibers at a fiber volume fraction of 1% on the properties of HPC was assessed. The compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity of HPC were evaluated. Moreover, a scanning electron microscopy (SEM) method was used to study the microstructure of the concretes. The results indicate that the replacement of OPC with CSA cement results in an improvement in the mechanical properties of HPC particularly at later ages of curing, while combination CSA cement with OPC and GGBS in the binary and ternary systems degrades the concrete’s strengths. The addition of 1% DHE steel fibers significantly increased the engineering properties of concrete. The results show that the bond between a cement matrix and steel fibers has been enhanced due to the expansive behavior of CSA cement. The SEM observation also shows the significant influence of CSA cement on the microstructure of concrete by forming a rich amount of ettringite which subsequently results in an improvement in the properties of concrete.
Sustainable Concretes for Structural Applications
Luigi Biolzi (author) / Sara Cattaneo (author) / Gianluca Guerrini (author) / Vahid Afroughsabet (author) / Della Torre Stefano, Cattaneo Sara, Lenzi Camilla, Zanelli Alessandra / Biolzi, Luigi / Cattaneo, Sara / Guerrini, Gianluca / Afroughsabet, Vahid
2019-01-01
Article/Chapter (Book)
Electronic Resource
English
DDC:
690
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