Concrete is the most widely used man-made construction material in the world, and as a result, concrete repairing has become an essential aspect of modern construction and maintenance practices. Due to variations in workmanship, materials, and environmental exposure, concrete structures are prone to defects such as honeycombing, cracks, surface voids, leakage, and other structural deficiencies that require timely concrete repairing solutions.
With continuous advancements in construction technology, a wide range of materials and techniques are now available for effective concrete repairing, including polymer-modified mortars, micro concrete, non-shrink grouts, and waterproofing systems. The selection of the appropriate concrete repairing method depends on accurate identification of the defect type, its severity, and the location within the structure.
This method statement provides a detailed guide to common concrete defects and their respective concrete repairing methods, such as honeycombing repair, crack filling, leakage plugging, and surface rectification. The procedures outlined are based on standard construction practices and widely accepted industry guidelines.
This document is intended for use by site engineers, quality control engineers, and construction professionals involved in concrete repairing works. The final repair methodology and material selection shall be subject to approval by the Consultant, PMC, and Client.
1. Purpose
The purpose of this work method statement is to define the methodology for identification, repair, and rectification of major concrete defects to ensure structural durability and to ensure that proper quality control is exercised at Project site at ______________ Project.
2. Scope of Work
This method statement covers all activities related to concrete repairing works considered as major defects that observed in concrete immediately after initial setting, during de-shuttering, or at early stages of construction within the project limits.
The scope includes:
- Identification and observation of concrete defects
- Classification of defects based on type and severity (minor/major)
- Surface preparation prior to concrete repairing
- Selection and execution of appropriate concrete repairing methods
- Inspection and quality control of completed repair works
3. References & Standards
- Drawings and any other relevant/applicable documents.
- Project technical specifications
- CPWD Specifications Volume 1 & 2
- IS 456:2000 – Plain and Reinforced Concrete: Code of Practice
- Clause 8: Durability of Concrete
- Clause 13: Construction Practices and Workmanship
- Clause 16: Inspection and Testing
- Clause 17: Special Concretes and Concreting under Special Conditions
- (Relevant for defect identification, durability issues, and acceptance criteria before and after concrete repairing.)
- IS 13311 – Non-destructive testing of concrete
- Part 1: Ultrasonic Pulse Velocity (UPV) – Quality and uniformity assessment
- Part 2: Rebound Hammer – Surface hardness and indicative strength
- (Used for pre- and post-concrete repairing assessment of structural integrity.)
- IS 9103 – Specification for Concrete Admixtures
- IS 2645 – Integral Waterproofing Compounds for Cement Mortar and Concrete.
- Manufacturer’s Technical Data Sheets (e.g., repair mortars, grouts, bonding agents)
- International Standards
- ACI 546 R – Guide to Concrete Repair
- ACI 224 R – Control of Cracking in Concrete Structures
- ACI 562 – Assessment, design, construction, and evaluation of concrete repairs
- EN 1504 – Products and Systems for the Protection and Repair of Concrete Structures
- ASTM C881 – Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete
- ASTM 1107 – Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Non-shrink)
4. Materials
- Cement
- Clean river sand / Washed sand / Quartz sand
- Potable water
- Polyalk Fixoprime (Sunanda)
- Concresive ZRI (BASF)
- Nitozinc Primer (Fosroc)
- Polyalk EP (Sunanda)
- Concresive 1414
- MasterEmaco S488 (BASF)
- MasterEmaco S348 (BASF)
- Rendroc S2
- Polycrete A
- Mastergout CNS-50
- Or similar materials as approved.
5. Material delivery
All materials required for concrete repairing works shall be delivered to site in original, unopened packaging with proper manufacturer labeling indicating product name, batch number, and date of manufacture. Materials shall be inspected upon delivery to ensure compliance with approved material submittals and to check for any damage, contamination, or expired shelf life
6. Material Storage
Proper handling and unloading procedures shall be followed to prevent damage to materials. Any non-conforming or damaged materials shall be rejected and removed from site immediately.
Storage shall be carried out as per manufacturer’s recommendations, ensuring protection from moisture, direct sunlight, and extreme temperatures.
7. Manpower
Project Engineer, Site Engineers, Supervisors, Foremen, QC Inspectors, Skilled Masons, Helpers, Safety Officer.
8. Safety Precautions
- All personnel involved in concrete repairing works shall wear appropriate Personal Protective Equipment (PPE) including safety helmets, gloves, goggles, safety shoes, and reflective jackets.
- Proper scaffolding and working platforms shall be provided wherever required. Scaffolding shall be adequately braced, stable, and inspected periodically before use.
- Work areas shall be kept clean and free from loose materials, debris, repair mortar spillages, and obstructions to ensure safe movement of workers.
- Chipping, hacking, and grinding activities shall be carried out using proper tools with necessary safety guards, and workers shall use face shields and dust masks to prevent injury and inhalation of dust.
- Handling and application of repair chemicals, bonding agents, and grouts shall be carried out as per manufacturer’s safety guidelines.
- Manual handling of materials shall be done by trained personnel using safe lifting techniques to avoid injuries.
- Throwing of debris or materials from height shall be strictly prohibited. Proper chute or designated disposal methods shall be used.
- All edges, openings, and elevated working areas shall be properly barricaded. Safety harnesses/belts shall be used while working at heights.
- Adequate ventilation shall be ensured while working in confined spaces or enclosed areas.
- Emergency procedures, including first aid and fire safety measures, shall be readily available at site.
8. Responsibility
The Project Manager/Construction Manager shall be responsible for the overall implementation of this procedure.
9. Equipment and Tools Used
The following equipment and tools shall be used for carrying out concrete repairing works, depending on the type and extent of defects:
- Mechanical chipping machine / Electric breaker
- Hand chipping tools (hammer, chisel)
- Angle grinder with abrasive discs
- Wire brush (manual and mechanical)
- Air blower / Air compressor for surface cleaning
- Concrete mixer / Mechanical mortar mixer
- Slow speed drill with paddle mixer (for repair mortars and grouts)
- Trowels, floats, and finishing tools
- Measuring cans / buckets for water and material proportioning
- Grouting equipment (manual or pressure grouting pump, where required)
- Injection pump (for crack repair, if applicable)
- Formwork / shuttering materials for micro concrete and grouting works
- Brushes and rollers for application of bonding agents and coatings
- Water spraying equipment / curing pump
All equipment and tools shall be maintained in good working condition and inspected prior to use to ensure safe and efficient execution of concrete repairing works.
10. Work Procedure
Sign up to download the full customizable Method Statement for Kota Stone Flooring works in Word format
