TENSILE BEHAVIOR OF SLURRY INFILTRATED MAT CONCRETE (SIMCON)

This paper presents the tensile behavior of a new type of high-perform ance (steel) fiber reinforced concrete (HPFRC), called slurry infiltra ted mat concrete (SIMCON). SIMCON is made by first placing continuous steel fiber-mats into the form, followed by infiltration of the dense fiber network with a cement-based slurry. Due to the very high fiber a spect ratio, SIMCON exhibits a high increase in both strength and toug hness. Furthermore since fiber-mats are easier to handle than short di scontinuous fibers, SIMCON has no major construction-related shortcomi ngs. Hence, SIMCON is well suited for repair; retrofit and new constru ction of earthquake resistant buildings, bridges, and other structures that require high strength and ductility. The paper presents experime ntally obtained stress-strain properties of SIMCON in direct tension. After a month of curing tensile strengths of lip to 17 MPa (2.5 ksi), and strains at ultimate stress ranging between I and 1.5 percent were reached with as little as a 5.29 percent fiber volume fraction SIMCON. This paper discusses the observed tensile behavior and proposes model s for predicting the entire stress-strain relationship including the e lastic modulus, ultimate stress, and strain at ultimate stress.