Research Article

Self-Monitoring of Reinforced Concrete Beam Bending with Carbon Nanofiber Polyurethane Composite

Table 4

Physicochemical properties of combined polyether.

Serial numberItemIndex

1SurfaceColorless transparent liquid
2Viscosity (25°C)/mPa·s200–1500
3Hydroxyl value, mg KOH/g350 ± 30
4Density (25°C)/(g/cm3)1.11 ± 0.20