2.2. Testing procedures
Compression test Compression test determines the behavior of materials when it is subjected to crushing load according with British Standard (BS) standard BS 5669 part 1. The machine used for compression testing was the Hydraulic Compression Tester VU-2000 – Jinan. The compression test was conducted at a cross-head speed of 5 mm/min. Sample dimension was 160 mm x 40 mm x 40 mm. The maximum load before crack was recorded.