ABSTRACT
Connections have very important role in pre-cast concrete structures, especially in seismic zones, and grout connections increase strength and resistance of pre-cast concrete structures tor lateral torces. High performance grout connections (HPGC) provide new opportunities to design cost-effective pre-cast concrete structures. HPGC have been proposed to decrease cost of insulation, erection and crane cost of pre-cast concrete structures and to overcome weakness of traditional pre-cast concrete structure connections .This research focuses on properties of grout materials properties which produced in Iran and the effect of propylene fiber on the performance of grout connection. In the first stage, more than 65 MPa (28 days) compressive strength was achieved for Iranian traditional grout which the results (failure in the rebars and performance of the sleeves) demonstrated sufficient strength of the grout. New type connections (sleeve) were examined and the results are reported in this paper .The experimental results demonstrated better performance of these types of connections. These connections are also considered to be more suitable for pre-east concrete construction in regarding to failure of the rebars (ultimate strength) in stead of the sleeves connection.
