BS EN 1504 full in brief - Concrete Repair

BS EN 1504, is a big standard that explains the causes of the concrete (including RCC) failures, and it corrections method extending to mention the requirements of the product to be used to maintain the structural stability and durability. 

This standard has got 10 parts and is as follows:

Part 1: Definitions

Part 2: Surface protection systems for concrete

Part 3: Structural and non-structural repair

Part 4: Structural Bonding

Part 5: Concrete Injection

Part 6: Anchoring of reinforcing bars

Part 7: Reinforcement corrosion protection

Part 8: Quality control and evaluation of conformity

Part 9: General principles for the use of products and systems

Part 10: Site application of products and systems and quality control of the works

BS EN 1504: Part 1: explains the definitions of the different products and their chemical name and combinations in brief.

Let us see some of the useful (as per my knowledge only and I have ordered as per easy understanding purpose) parts in brief:

Defects and repiar of the CC and RCC explained as Principle and are as follows: 

Defects in Concrete

Principle 1 (PI) Protection against ingress

Principle 2 (MC) Moisture control

Principle 3 (CR) Concrete restoration

Principle 4 (SS) Structural strengthening

Principle 5 (PR) Physical resistance

Principle 6 (RC) Resistance to chemicals

Repair of Reinforcement Corrosion

Principle 7 (RP)  Preserving or restoring passivity

Principle 8 (IR) Increasing resistivity 

Principle 9 (CC)  Cathodic control

Principle 10 (P10) Cathodic protection 

Principle 11 (CA)  Control of anodic area

Here are some basic consideration and action:

The following procedure for the assessment of the condition of concrete structures regarding reinforcement corrosion holds good for every site at every situation:

BS EN 1504: Part 2: This part explains mainly about the surface protection systems for concrete repair and protection.

Here coatings are mainly explained based on 6 Principles:

This quite image explains the difference between Hydrophobic impregnation sealer, impregnation sealer, and coatings:

Part 02, also explains the performance requirements all the three sealers/coatings as follows 

Performance requirements for hydrophobic impregnation / impregnation sealer used for concrete repair and maintenance

Performance Requirements for Impregnation / Impregnation sealer used for concrete repair and maintenance:

Performance requirements for coatings / Coating used for concrete repair and maintenance:

 

Part 9: General principles for the use of products and systems

As you know, Cement Concrete (CC) and Re-inforced Cement Concrete (RCC) deteriorate because of many reasons, here are the major points explained in the British English Standard 1504:

Concrete deteriorates because of:

1. Mechanical reason for concrete deteriorates:
1. Abrasion
2. Fatigue
3. Impact load
4. Moverloading
5. Movement / Settlement
6. Explosion
7. Vibration
2. Chemical
1. Alkali-aggregate reaction
2. Aggressive agents, ex., sulphates, salts, softwater)
3. Biological action
3. Physical
1. Freeze/thaw
2. Thermal effects
3. Salt crystallization
4. Shrinkage
5. Erosion
6. Wear
4. Fire

Reinforced Cement Concrete deteriorates because of:

1. Carbonation
1. Cement type & content
2. W/C ratio
3. Curing
4. Rainfall
5. Temperature
6. Humidity
2. Corrosive contaminants at mixing time
1. Chloride salts entry
2. Chemical entry from an external source - Seawater, road salt, and other contaminants.
3. Stray currents

Part 3: Structural and non-structural repair - requirements for repair Principles 3, 4 & 7 

This standard BS EN 1504-3 provides performance characteristics and requirements for structural and non-structural repair products under the following 3 repair principles. 

Principle 3. Concrete Restoration 

Principle 4. Structural Strengthening 

Principle 7. Preserving or Restoring Passivity 

Certain parameters/property of the repair mortar are required for certain principle and are verified in the following table:

Repair Mortar for concrete repair is classification as per this standard will be of 2 main classifications and again into 2 subdivisions each.

        1. Non-Structural Repair mortar: 

                a. Class R1 – Low-performance repair mortar

                b. Class R2 – Medium performance repair mortar

        2.Structural Repair mortar: 

                a. Class R3 – Good performance 

                b. Class R4 – High performance

The requirement of mortar shall be as follows :

Many thanks to Google, Doc88.com.... from where the details were collected.

This blog is still under construction.