2.2.5. Mixing Process

For specimens without treatment of TX10, the mix process was as follows:


For specimens with treatment of TX10, the mix process was as follows:


Note that, when TX10 was added, foam was generated in the cement matrix, resulting in the increase of porosity of samples. The mass of specimens and bulk density decreased compared to the specimens with no TX10 added. This is discussed in Section 3.4.

After mixing of materials, the composites were filled into cube and prism molds. The size of the cube mold was 100 mm × 100 mm × 100 mm. The size of the prism mold was 40 mm × 40 mm × 160 mm. After 24 h, the mortar specimens were placed into curing container at a constant temperature of 23 ± 1 ◦C and relative humidity of 100% according to the ASTM C192. The curing times of SWCNT-added specimens were set as 3, 7, and 28 days. MWCNT-added cement-based specimens were set for 28 days.
