Mould and Specimen Preparation
The test specimens used for the investigation of the uniaxial tensile creep of cracked macro-synthetic FRC were prepared from modified steel prism moulds measuring 100 x 100 x 500 mm3 as shown in Fig. 1.
Specially designed steel hooks were worked into the moulds for the purpose of supporting the specimens in the testing machine. Adequate care was taken to ensure the alignment of the central rods of the anchors positioned at each end of the mould to avoid eccentricity as much as possible. After the horizontal and vertical alignments of the central rods of the anchors were achieved, they were then supported in position with a crossbar using a binding wire already attached to the central rod of each anchor.
After the preparation of the moulds, specimens were cast and compacted using a vibrating table. The cast specimens were demoulded after 21 ± 1 h and cured by complete immersion in water at a controlled temperature of 23 °C. Concrete cubes (100 mm) with and without fibres were also cast to determine the compressive strength of the concrete mixes. The compressive strength of the mixes, with and without fibres are 40.19 and 43.80 MPa respectively.
Fig. 1 Modified steel moulds showing anchors