Table 3 Mixing proportioning and procedure of cement-based overlays
Name | Mixing proportion | Applying procedure |
|---|---|---|
Control mortar overlay | Cement: Water: Water reducer: Sand: Air-entraining agent = 1:0.38:0.0093:3:0.001 | Firstly, water reducer and air-entraining agent were dissolved with water, then blending cement and sand with solution together for 5 min to obtain CMO. |
Latex modified mortar overlay (LMO) | (Cement + Latex (Solid)): Water: Sand: Air-entraining agent = (0.8 + 0.2):0.38:0.20: 3:0.001 | Firstly, Latex and air-entraining agent were dissolved with water, then blending cement and sand with solution together for 5 min to obtain LMO. |
Silica Fume modified mortar overlay (SFMO) | (Cement+ Silica fume): Water: Water reducer: Sand: Air-entraining agent = (0.9 + 0.1): 0.38:0.012: 3:0.001 | Firstly, water reducer and air-entraining agent were dissolved with water, then blending cement, silica fume, sand, and solution together for 5 min to obtain SFMO. |
Microfiber-Nanoclay reinforced mortar overlay (FMO) | (Cement+ Silica fume): Water: Water reducer: Microfiber: Nanoclay: Sand: Air-entraining agent = (0.9 + 0.1):0.38:0.0127:0.0025:0.005:3:0.001 | Firstly, microfiber and nanoclay were soaked in half of water for 24 h to get prewet with a 45 min aid of 400 W ultrasonic treatment. Then, the water reducer and air-entraining agent were dissolved in remaining half water; Finally, the cement, silica fume, sand, prewet fiber and clay, and solution were fully mixed for 5 min to obtain FMO. |