Renovation of reinforced concrete

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PASSIVATION OF IRON RODS:

GRIPTOW

RIPRISTINO STRUTTURALE

TOWERIP

TOWCEM

TOWERIP 108

MOULDABLE RESTORATION:

MALTA MODELLABILE

RESTORATION IN FORMWORK:

TOWERIP COLABILE

RESTORATION IN CONCRETE COVER:

TOW BK

RESTORATION OF CONTAINMENT TANKS:

TOWERIP BETONCINO

ANTI-CARBONATION SMOOTHING:

TOW BN ANTICARBONATAZIONE

ARMATEX C1

PROTECTIVE FINISHES:

IDROBETON

IVASGUM

MURALPAC LISCIO

Dispensa Tecnica Del Ciclo

PROBLEM: Deterioration of reinforced concrete
Good quality reinforced concrete (or cement) usually begins deteriorating after 10/15 years. The following essential parameters effect durability: minimum value of characteristic resistance Rck; minimum water/cement ratio; minimum cement content; minimum thickness of concrete cover. Deterioration of reinforced concrete can be seen in various different ways: cracks in the concrete; spalling of cover; disintegration of the concrete; corrosion of the reinforcement rods.

The causes of the deterioration can be summarised into two categories:
INTERNAL CAUSES
- Bad design or poor quality materials
- Incorrect laying (forming of gravel clumps)
- Inappropriate curing processes
EXTERNAL CAUSES
- Mechanical causes (lesions caused by stresses; micro cracks caused by dilation/shrinking; forming of ice in the matrix and aggregates)
- Chemical-physical causes due to environmental factors (deteriorating mechanisms of a chemical nature caused by water, air and land: permeability, diffusivity, capillarity, wash-out)

The Ivas and Tower research laboratories have studied a specific cycle of intervention, comprising high quality products that can comply with certain basic factors, namely: mechanical resistance similar to LSC; high power of adhesion to iron and LSC; dimensional stability; durability; easy to lay; no shrinking or bleeding; availability of various finish types. A cycle of LSC renovation can comprise of various steps:

Support preparation (manual clearing of surfaces)
Passivation of iron rods (product: GRIPTOW)
Structural restoration (according to thickness required: TOWERIP / TOWCEM / TOWERIP 108)
Mouldable restoration (product: MALTA MODELLABILE)
Restoration in formwork (product: TOWERIP COLABILE)
Restoration due to lack of concrete cover (product: TOW BK)
Restoration of containment tanks (product: TOWERIP BETONCINO)
Anti-carbonation smoothing (TOW BN Anticarbonatazione + ARMATEX C1 mesh if req.)
Protective finishes (IDROBETON / IVASGUM / MURALPAC Liscio)

Images of the deterioration and restoration of reinforced concrete

Images of the deterioration and restoration of reinforced concrete