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DEGRADATION PROCESS (CONCRETE (SURFACE (:check: Coating ((Primer+) Paint,…

- - - - Cracking
  - - - Horizontal cracks
        
        One side satureted -->
        wall curving
  - - - (Preparation vs cracks..)
        
        Try different ways
        
        A) Water & Brush
        (can cause damage)
        
        B) Steam cleaner
        
        C) High pressure lance
        (danger for distance and temp.)
        cheapest
        
        D) Chemical (in gel)
        
        washing
        
        E) Abrasive
        
        blasted with pressure
        
        softer than concrete
    - - (Primer+) Paint
      - Rain problem:
        Transparent waterproof
      - Low risk:
        Anti-carbonation coatings
      - :explode: Ultraviolet radiation
        
        Moisture
- - - - Mould
        
        :check: Preservatives pressed into
        :star: Lower humidity
        :star: Saw after drying (nutrient removed in dust)
        
        :pen: Estimation:
        Mould index growth
        [0-6]
    - - Rot
      - Thinner pores than concrete > Take moist.
      - Increase thermal conductivity
    - - Bacteria
- - - - :fountain_pen: Time of wetness
        Time: water on surface
        North EU=4000 h/yr
      - Atmospheric c.
        
        Dry oxidation
        chemical mechanism
        
        Damp c. (RH<100%)
        non visible water layer
        
        Wet c. (RH=100%)
        
        Sheltered c.
        inside, water carry salts and gasses
- - - - Photolysis:
        electromagnetic radiation
      - Oxidation:
        O reacts
      - Hydrolysis:
        H2O reacts