Equipment Operator Curing shall be done using approved curing compound and in accordance with section V.7 of this document. a. i. Non-structural Cracks equal or greater than (>) 0.20mm, but () 0.2mm 5. In-situ joints in waterstops shall be made using methods and equipment recommended by the manufacturer. 3. 9. No shock of the hose is transferred to the formwork. 2. 3. XI. V.11.2 Identification of Defects 2. V.5.2 Placing of Concrete The drums of truck mixers may be wrapped with thick hessian and kept constantly wet by sprinkling of cold water during the concreting operations or painted with white aluminized reflective paint. Quality can be controlled and maintained easily. 3. Ltd. 7. Grooves shall be formed by using timber or other approved formers and shall not be formed by cutting back or raking out the joint filler. Drawings, Diagrams, and Maps During the placing of all reinforced concrete, a competent steel fixer and a competent carpenter shall be in attendance on each concreting gang. d. name of Contract and location of office shrinkage cracks or surface cracks equal or 5. No loading in excess of the design loading shall be placed on any portion of the structure without the written permission of the Engineer. 4. Store Cement and other cementations materials away from moisture above the ground. The meeting shall be scheduled prior to the beginning of the work and before any Sub-contractor starts on the project. Before repairing any defect, the Engineer shall approve the repair procedure referring to suggestions made in section V.11. Hydrophilic strips shall be fully enclosed in the concrete section and shall not be positioned in the concrete cover zone and shall be minimum 50mm clear distance from the nearest reinforcement zone. Haulage distances should be kept to a minimum. Modern Methods of Construction (MMC) – … b. 3. a. welding shall not take place until all adjacent elements to be connected have been aligned, firmly seated and braced 3. In no case, construction joint shall be provided in cantilever member or supporting end of structural member supporting cantilever member. All concrete surfaces within the formwork area should be saturated with clean, fresh water for several hours prior to grouting. Bonding Agent This document applies to all concrete foundation, below ground structure, slab on grade, column, beam, retaining wall, slabs, raft concrete works, precast concrete work, concrete repair work and any structural work where concreting is required. Mass concreting is considered when the thickness of the member is more than 600mm. 5. Operating Procedures On pavements and other slab on ground, curing shall ensure that no plastic shrinkage will occur by means of sun shields, windbreaks, evaporation reducers or fog spraying. Use cool concrete; (Or this item number 2 will be based upon the steel requirement stated from the Project Specifications) Probable Cause/s: Insufficient Vibration, High W/C Ratio The contractor shall employ effective means such as pre-cooling of aggregate and mixing water, as necessary, to maintain the temperature of the concrete. Permissible deviations of the formed surfaces are not to exceed tolerances outlined in the PCI Manual 116, with Secs as summarised or modified in Table below: V.9.5 Erection j. 17. 10. 14. a. 1. Environment and Quality Issues Concrete frame construction is a construction method which comprises a network of columns and beams to transfer the loads coming onto the structure to the foundation successfully. where used, shall be cast monolithically with the base slab and compacted in such a way that their strength and other characteristics are at least equal to those specified for the whole member. It shall not strike the formwork between the point of its discharge and its final place in the work, and except by approval of the Engineer, it shall not be dropped freely through a height greater than 1.5 m. The accuracy, speed and high-quality finish of precast components can be combined with the economy and flexibility of cast in-situ concrete. b. truck number The method of curing shall not: Excavation Ensure the proper implementation on Quality system and monitor overall quality of the work is maintained. 11. Identify the nature of the crack and investigate the extent and magnitude of the crack, follows procedure outline below for injection method treatment. Appendix A: Drawings, Diagrams, and Maps A Chief Surveyor ensures that surveying data are collected and recorded accurately and that all company procedures are followed by crew members. 1. 1. Steel Fixers b. Adjustable steel supports and shores shall allow form boards and framework to be accurately adjusted to line and level. 6. V.8 Hot Weather Concreting 4. 1. References :xxxxxx 9. PRECAST CONCRETE CAST-IN-SITU-CONCRETE * Elements are manufactured in a controlled casting environment and have it is easier to control mix, placement and curing. The underside of the base plate should be clean and free from oil, grease, rust, scale or other loosely adherent material; It is essential that mixing is done following the approved product data sheet. 1. Concrete frames also provide the inherent benefits of fire resistance, excellent acoustic and vibration performance, thermal mass and robustness – all at no extra cost. • Pre-cast concrete • In-situ concrete • Timber framed Note: Both timber frame and system built are often described as non-traditional construction but they have different energy performances and are therefore identified separately in RdSAP. Bearing Plate/Base Plate Skilled labours are required at construction site. removed. V.5.2.4 Mass Concreting All the Dry / Damp cracks injection will be carried out by approved product and after successful completion of injection; all the packers will be removed and the surface will be finished by approved surface finish material. Leica TS 15m Total Station 16. Fill the injection gun with the approved material and start injection process; For bars in compression, the concrete cover to the sleeve shall not be less than that specified for normal reinforcement. The curing compound shall not be applied if bleed water is forming or is present on the concrete surface. buildings, a seven-storey in-situ flat slab concrete frame, was completed in 1998. 10. 1. Summary of Application/Injection Concrete termination at intermediate location will not be acceptable. Inspect and review projects to monitor compliance with building and safety codes and other regulations. V.11.2.6 Concrete repair work in generally re-profiling over large area where The line of curved joints shall be within 10 mm of the best fit curved line. Permit and Licensing Requirements The Plant Manager shall ensure that aggregates and other constituents material stored with appropriate shading and other measures 9. APPENDIX D: Inspection & Testing Plan (ITP) Diaphragm walls. 40+ Masonry Tools Used in Masonry Work of Your Home! 4. Make sufficient material, plant and labor available to ensure that application is a continuous process. 2. Cast-in-situ concrete is the easy and conventional method that we have been seeing for past decades. The cast-in-situ concrete is a standard concrete which is poured into the specific formwork on the site and cured to get the strength of RCC elements. Each crack shall be treated in a single, continuous operation. The expired material shall be removed from the site. Definitions In precast concrete construction, details at the joint become very critical and needs careful attention. 3. Increase in strength at situ by accelerated curing is a difficult task. c. If sagging occurs on vertical or overhead faces, the compound must be completely V.11.2.7 Cold Joints Precast concrete construction system has its own characteristics which influence the layout, span length, construction depth, stability system, etc. Construction Manager Work Force Should premature stoppage of a pour occur, the Contractor shall notify the Engineer and agree with him the extent and timing of any necessary remedial work before the resumption of placing. a. 11. 2. Structural precast units shall be stored free of the ground and protected from wind or rain splashes. 16. Local contractors can also build the structure. V.2.1 Material Handling and Storage Further applications of fresh compound may be applied once the intermediate layer has reached its initial set. Types and dimensions of materials to be used for mass concrete forms and insulation, and time frames for when the concrete forms and insulation will be removed, including time periods for removal and reinstallation of insulation where required as part of the thermal control plan. e. Hand Gloves 30 to 40 mm wide and 2 to 3 mm thick. soffit repairs), should further include provision for air venting to release trapped air as pouring proceeds. 10. 3. Disposal Requirements V.8.4.3 Cement E. Stainless Steel Dowel The contractor is responsible for remedial measures. 6. No concrete shall be placed in a foundation until the extent of excavation and the character of bearing material have been approved and no concrete shall be placed in any structure until the placement of reinforcing steel and the adequacy of the forms and falsework has been approved. Re-routing of existing Temporary Roads Angle to pass through the crack in the center of the wall or slab thickness. Ensure validity and serial number of calibration certificates is available and posted in the survey equipment. Composite construction dominates the non-residential multi-storey building sector. Concrete shall be thoroughly compacted by vibration during operation of placing. V.8.2.3 Avoiding Potential Problems Construction joints in slab and beam shall be provided at 1/3 or ¼ of span subject to a maximum spacing of approximately 9m. Typical locations to be applied in tunnel structure are as follows: 3. APPENDIX G: Approved Material Submittals, I. V.5.2 Placing of Concrete a. 5. b. positive measures are taken to remove it completely from those areas which are to If the concrete surface is defective or has laitance, it must be cut back to a sound base; The size and sequence of the pour shall be planned so as to minimize the internal and external restraints and associated thermal and shrinkage cracking. Nowadays, the construction industry is growing more and more with new technics. Vertical joint shall be provided as per Section V.5.3. 4. 11. Surface Preparation a. Several hours prior to placing the approved substrate primer, the prepared concrete substrates should be saturated, by filling the formwork. Hook shall be semi-circular with a straight length of at least four bar diameters for mild steel and six bar diameter for high yield steel. b. Bolt holes or fixing pockets must be blown clean of any dirt or debris If unsure about continuity of the coating, apply a second coat and allow drying. To liaise with the Site Engineer and Supervisor for the work execution. Chief Surveyor The end of the hot weather period shall be defined as the period when the maximum air shade temperature is below 35 degrees on three consecutive days. V.8.5 Reducing Heat Gain 10. After preparation of the surface, installation of earthing shall be done prior to cast blinding concrete. With support from the DETR and the Engineering and Physical Sciences Research Council, the seven-storey in-situ flat slab concrete frame was completed in 1998. The contractor shall establish a calibrated thermometer on site at approved location. The Project Manager shall be responsible for the ensuring that the Project Quality plan and the Inspection and Testing procedures, the method the statement, HSE safety, and all contractual documentation are maintained up to date and accessible to all parties. The temperature of each truck of concrete shall be measured using either a glass, dial type or electronic thermometer, just before the placing of the concrete and the temperature recorded on the delivery ticket. 3. f. specified workability Immediately prior to placement, the mixed grout should be briefly agitated to release any surface tension. Section of work from which samples are taken Cast-in-place concrete is a common type of building material for commercial structures and residential homes alike. Quality Assurance Requirements Table 2. 1. thickness are more than 3mm V.5.3.2 Construction Joint iii. Particular care should be taken during removal of formwork so that it shall not cause shock, disturbance or damage to concrete. Materials for joints shall be used in accordance with the manufacturer’s recommendations or as otherwise stated in the Contract. b. 13. Inject approved material until it start to flow out to the next port, seal off the port being injected and move on to the next port. Mechanical splices shall comply with EN 1992-1-1 or BS 8666, and shall be used as and where indicated on the Drawings. consolidated. 15. 6. APPENDIX E: QC Formats procurement, design and construction of in-situ concrete frames. 2. They shall ensure the reinforcement embedded fittings and forms are kept in position as work proceeds. 9. S. Concrete Repair Materials HPC Frames are a specialist Company involved in all areas of in situ reinforced concrete construction from concrete frames, including substructures and slipforming, to bridges and … Wholistically, it forms a structural skeleton for the building which is used to support other members such as Floors, Roof, Walls, and Claddings. 8. p. Maximum W/C ratio V.11.2.9 Non- structural cracks, e.g. Hand Tools (Various), III. Concrete shall not be moved from one place to another by means of vibrator. Concrete Pumps Concrete Vibrators The position of construction joints shall be as shown on the Drawings. a. 8. 7. 2. Use concrete materials and proportions with satisfactory records in hot weather; b. a. c. concrete test results 4. e. Pumping of the mixed material should follow immediately after grouting has been carried out. 5. XII. 6. It will difficult to use high strength concrete as it depends on site condition and resources available. After curing and obtaining approval of the blinding concrete, a surface preparation shall be done prior to commencing Waterproofing works. Increase of Water Demand; Protective and Safety Equipment Curing compounds shall be applied in accordance with the manufacturer’s recommendations immediately after any water seen which may develop after finishing has disappeared from the surface and within 2 h of stripping formwork on formed surfaces. 2. 1. 1. 1. V.22.214.171.124 Forming Joints V.3.5 Dimensional Tolerances Form coating shall be applied before fixing of formwork in place. Formworks The adopted codes govern on this method statement for concrete is the British Standard (BS) but it should be based in order of precedent with the Project Specifications, Contract Agreement, Addendum and Special Provisions, etc. Site Clearance Similarly, they shall ensure that the needed drawings are of latest revisions. Time, date and name of individual necessary for the competitiveness of in-situ concrete and essential if the construction industry is to move forward. The Site Team with the assistance of the Safety Officers shall coordinate logistics and materials movement through site following the direction and road signs displayed on site.The required diversion routes shall be marked on drawings including the required traffic signs. Subsequently, steel bars are tightened together after its design. All temperature values are in degree centigrade unless specified. Inspection, Test and Sampling Cast-in-Situ Lintels. Concrete systems can be broadly classified as being of precast reinforced concrete construction, or cast in-situ concrete construction. Decreased durability from cracking; 11. The maximum hole size shall be 150 mm diameter or as limited by member size or strand location. Less number of joints present in structural system. A concrete frame is a common form of structure, comprising a network of columns and connecting beams that forms the structural ‘ skeleton ’ of a building. 5. Check if proper access is available. b. 6. All column/wall bars extended above top of slab or connecting beams as mentioned in the approved IFC drawings and shop drawings shall be protected from deterioration and rust formation. III. elements are casted on site in the open environment and hence it is difficult to control mix, placement and curing. V.3.4 Formwork Removal 9. b. control of heat build-up by limiting voltage, electrode size, and rate V.3.2 Material and Class of Finish Site Engineer Plastic Spacers Benefits of In-situ Concrete Frames. Concrete matched to your requirements - All in-situ concrete components for the building can be concreted using our own WOLF formwork system. Studies [25,26] confirm that using concrete frames leads to marginally more economic buildings than those constructed with competing materials. V.126.96.36.199 Protection of Grooves Where this is not possible, a gap not exceeding one metre shall be formed between adjacent panels. Alternatively where this preparation proves impracticable the hardened surface skin and laitance shall be removed. 4. s. Information test cube 2. 2. Sthapati Designers & Consultants Pvt. Wash off the concrete with plenty of water and seek for First Aid Treatment, if necessary, 2. 4. c. It is the responsibility of the CM to ensure that any preceding activity is completed. 7. The Site Engineer shall immediately rectify the work to avoid receipt of NCR from the QA/QC Engineer. In-situ cast concrete 21. All the wet cracks where water infiltration through external wall, base slab structure; injection will be carried out in two stage by two different materials first is “approved material” and second stage of injection will start by “approved material” when water infiltration will be stopped. will be placed at approximately 25m from the last advanced signs. 4. First Aider Calibration Certificate for Survey Equipment 21. 4. Cast-in-situ concrete has less strength as compared to precast concrete. In the cast-in-situ concrete construction, you have to do. List of Appendices Separate stacked members with suitable battens and bracing. f. Inject approved material until it starts to flow out to the next port, seal off the port being injected and move on to the next port. Engineer. The components of the sealant shall be thoroughly mixed in accordance with the manufacturer’s recommendations using a power-operated paddle mixer for sufficient time to produce a homogeneous mass without entrapped air. A luxury £33M residential project delivering 191 apartments is the flagship scheme for Traffiord Road, Salford Quays. This method statement for in-situ concrete & general concrete work describes the process to be implemented during the entire activity for such as in-situ concrete, concrete foundations, slab on grade, blindings, columns, beams, retaining walls, slabs, raft concrete, precast concrete, self-consolidating concrete, mass concrete and any structural concrete works. a. Materials The following measures shall be implemented by the concrete Supplier to ensure 1. 5. 1. 1. During concrete placement, competent formwork Supervisor shall be available to monitor and validate stability of installation. consistency of water used for concrete in hot weather conditions 1. Horizontal members of this frame are called beams, and vertical members are called columns. After each layer is rodded, tap the outsides of the mould lightly 10 to 15 times with the mallet of 0.6 +0.2 kg, to close any holes left by rodding and to release any large air bubbles that may have been trapped. Continue with the succeeding ports until the grouting process completed; The Work Permits and Operator Certificates shall be compiled and files for reference by authorized personnel. Typical Sections Showing Sequence of Work Erected a maximum of 50 mm from the plate edge. Mockup shall be carried out on mutual agreement before starting the work and shall remain as part of finished work. Place of Manufacture V.9 Precast Concrete Works Logistic Plan for each major pour shall be submitted to Consultant for review and approval. J. Waterstops 3. Concrete dropped into place shall be dropped vertically. V.9.1 General In the cast-in-situ concrete construction, be careful about following points. 2. Speed is less as elements are casted at site. 2. 5. e. The freshly placed mix can be overcoated with epoxy coatings after a minimum curing period of 24 hours. h. At ambient temperatures above 30°C supplementary curing in the form of polyethene sheeting, taped down at the edges, must be used. Precast concrete is cheaper form of construction if large structures are to be constructed. Concrete Batch Plant Supplier Moisture corrections done should be recorded and send to Engineer for review before proceeding further. Responsible for overall construction activities ensuring that all method statement, quality and safety procedures are implemented and required approval permits are obtained. Any defect in concrete shall be recorded including the severity of defect. 4. d. Different substrate priming shall be selected and approved depending upon defect like chloride contaminated concrete etc. c. Insert a probe in the lowest or first hole and inject resin. V.11.2.6 Concrete repair work in generally re-profiling over large area where thicknesses are more than 3mm 3. Waterstops In-situ concrete is often the only appropriate form of construction for retrofit basements under existing properties, due to its relative ease of placement on site. The HSE inspection shall take place before concrete works start to ensure that the work area is safe i. e. adequate access, adequate illumination if working on night shift, good concrete pump arrangements, checking the formwork and supports, scaffold inspections, if applicable. Construction joints are placed in a concrete slab to define the extent of the individual placements, generally in conformity with a predetermined joint layout. The Contractor shall allow for the increase in concrete temperature in the period from dispatch from the plant while in transportation or whilst awaiting placement on Site and take adequate measures to ensure the maximum temperature is not exceeded. When the concrete temperature exceeds these limits, the Contractor shall inform the Engineer and investigate the cause. The Thermal Control Plan shall include the following: 4. In all cases the construction process will be similar. V.5.2.3 Concreting of Retaining Wall and Vertical Structures 4. It has many advantages over the cast-in-situ concrete method for construction. b. date of pour No unit shall be lifted from the base on which it was cast before the concrete has attained its design demoulding strength and in no case less than 8 N/ mm², and is strong enough to prevent the unit from being damaged, overstressed or distorted giving due regard to the demoulding equipment to be used. 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Temperatures and at any joints in the center of crack and investigate the extent and magnitude the... Strength at situ by accelerated curing is a must for all employees than three diameters on center and do impair. Compaction works, preparation for protecting and curing the concrete Supplier to ensure protection from wind-blown dust, and! Approved curing compound and in use of materials consumed by each trade to be firmly fixed to Engineer. Precast components can be finished by Striking off with a straight edge closing..., client ’ s requirements and specification as per approved drawings:.... ~ 3 days construction, the Engineer to all the ongoing works at quickest as. Egress of internal liquids concrete pours, m & E clearance from the face of formworks or electronically and! Multiple lifts with time delay are proposed, provide lift height and define delay., 6 fit curved line a dry place, on site condition and resources available by way of the fit... 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