Abstract: Basalt fiber mesh material is a new type of fiber reinforced polymer composites, which is made of basalt braided rope as raw material. But the testing process of grid material performance is more complex. So the research on the mechanical properties of raw material can simplify the research process of grid material mechanical properties. The braided parallel fiber rope with different braided pitch rope such as 20 mm, 30 mm, 40 mm, 50 mm and 60 mm as rope core and basalt fiber roving as rope core were used as reinforcements. Composite materials with certain shape and properties were prepared by composite curing with epoxy resin CYD-128. The effect of rope core form on the mechanical properties such as tensile properties, bending properties and compression properties of the composites were tested. The results of one factor variance analysis show that the reinforcement rope core pitch has a significant effect on the tensile properties, bending properties and compression properties of the composites. The results of visual analysis show that in this experiment range, the fracture strength of the reinforcements with rope core pitch of 60 mm is the highest, which is 56% higher than the lowest value with rope core pitch of 20 mm. The tensile strength and compressive strength of the composite with reinforcement rope core pitch of 60 mm are the highest, which are 77% and 238% higher than the lowest value with reinforcement rope core pitch of 20 mm, and the bending strength of the composite with braided parallel fiber rope is the highest, which is 59% higher than the lowest value with reinforcement rope core pitch of 20 mm.

Key words: double braided rope, braided parallel fiber rope, rope core pitch, composite material, mechanicalproperties