Precast concrete wall Precast concrete frame 4. 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. Site Clearance Loose concrete shall be removed until the sound, dense concrete is exposed; Temporary supports shall be retained until framing elements braced thereby have attained integral stability in accordance with the design. 12. In Which Type of Projects We can Use Precast Concrete? d. Adequate measures are taken to prevent contamination of concrete 6. Design of Formwork shall be carried out in accordance with CIRIA Report – 108. a. Large number of joints in structural system. b. 7. In situ concrete is cheaper form of construction for small structures. 10. 7. Blinding concrete shall be done as per approved Method Statement for Blinding Concrete Works. 5. Formwork V.5.2.5 Roof Slab V.2.2 Mechanical Splices d. Name of technician Joints, gaps, and connections shall be filled with grout as shown on the Drawings and as approved by the Engineer. These should include ample water for moistening, fogging forms and reinforcement. f. All working activity shall comply with Client Safety Procedure. V.8.2.1 Plastic Concrete 5. 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. Bearing Plate/Base Plate b. 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. 3. Rigger As per site requirements 2.Summary of application/injection Construction joints in slab and beam shall be provided at 1/3 or ¼ of span subject to a maximum spacing of approximately 9m. Maintain all plant clean and with suitable reflective surfaces and heat insulation as relevant. e. And any other relevant information 3. 1. 2. 4. 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. The Site Team shall make sure that access roads are always clear from any obstruction and site is always accessible. b. control of heat build-up by limiting voltage, electrode size, and rate Set out for injection holes half the wall or slab thickness away from the crack at 250 to 300mm centers. materials, testing and mix design shall be as specified in mix design. Subcontractor/Suppliers Sufficient grout must Horizontal construction joints shall be given a brush coat of grout consisting of cement and fine aggregate in the same proportion as concrete to be placed. V.11.2.10 Structural Cracks (cracks > 0.2 mm), Deep-seated cracks (beyond rebar V.8.4.1 Aggregates This video shows the Difference between Pre Cast & Cast in Situ Concrete. a. d. If multiple lifts with time delay are proposed, provide lift height and define time delay between lifts. Insulation in the form of insulating formwork, insulating blankets and/or other approved insulating materials, shall be left in place until it can be removed without causing thermal distress to concrete in thick sections (typically 600mm or more). 4. Disposal Requirements e. Multiple layers can also be used to achieve the desired thickness and profile; but care 10. 20. IV. V.5.3.4.4 Sealing Joints 1. Fill the injection gun with the approved material and start injection process; List of Appendices Curing for Concrete Patchwork: Polyethylene or plastic sheets shall be used to cover concrete patchwork. Coring tests or Non-destructive testing may be required as directed by the Engineer, to verify the quality of the concrete bonding interface. V.11.2.2 Blowholes (re-profiling 0 to 10 mm deep) Where slabs, beams and walls incorporate construction joints, panels shall generally be constructed consecutively. 3. 4. Erected a maximum of 50 mm from the plate edge. Increase permeability; The addition of small quantities of water to the finishing trowel will be permitted to aid finishing. After identifying uncontrolled hazards; Contractor will take steps to eliminate or reduce them to an acceptable risk level. 4. Copies of all delivery notes shall be submitted to the Engineer in duplicate, on computer-generated forms and shall include at least the following information. V.8.2.3 Avoiding Potential Problems 8. 11. Curing compounds shall not be used on surfaces against which additional concrete or other material is to be bonded unless: The curing shall ensure that sufficient moisture is present to complete the hydration of the cement. 1. Exposed steel reinforcement should be securely held in place to avoid movement  during application, as this will affect the compaction, build and bond of the mortar; Steel Reinforcement ref. Horizontal or Vertical or overhead crazing portion will be repaired by approved type low viscous epoxy resin. V.3.2 Material and Class of Finish 1. The foreman monitors employees to ensure that the work is done efficiently and within quality standards. Concrete will be checked according to the tolerances for slump, temperature, strength and durability referring to approved mix design only. Prior approval is obtained f. Roles of the contractor, subcontractors, authority representatives and all project workers. 9. a. Increase in strength can be achieved by accelerated curing. Inspection, Test, and Sampling 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. a. h. Damp sponges or plastic floats may be used to achieve the desired surface texture, but care should again be taken not to overwork the surface. 2. h. When the grout reaches the open side of the formwork, and rises above the underside of the base plate, pouring should continue slowly down the length of the base plate until completed. 6. This post is also available in: Probable Cause/s: Impact from Heavy Object; Form Stripping, Poor Vibration, Loss of  Grout. it is the type of concrete work that does not require much quality control process.. a. 9. Reinforcement Priming Concrete frames also provide the inherent benefits of fire resistance, excellent acoustic and vibration performance, thermal mass and robustness – all at no extra cost. d. If concrete is required to be done on earlier concrete work, it is the responsibility of the QC Engineer to approve that concrete had hardened (% Strength) enough to withstand a load of reinforcement, formwork, fresh concrete and concrete operations. c. concrete test results 2. cracks on external wall and side part of the base slab (equal or greater than 0.20mm) Expected date and size of deliveries to site The contractor shall employ effective means such as pre-cooling of aggregate and mixing water, as necessary, to maintain the temperature of the concrete. We have been using these templates in most of the projects that I am involved with. 8. 5. greater than (>) 0.20mm, but ( 0.2 mm), Deep-seated cracks (beyond rebar You can reach him via Twitter ID. 5. Ensure that the paste will not block the port; 12. Mobile Crane Concrete shall be thoroughly wetter during and immediately after form removal process. Risk Assessment Its success is due to the strength and stiffness that can be achieved, with minimum use of materials. For priming in other conditions, apply approved primer as per its current instructions. This method statement shall be adopted when concrete defects are identified at site after post-concrete work inspection specifically after stripping of formed surface. Photographs would be taken for information to maintain traffic safety record-keeping. Ends of water bar should be protected from damage. The Framework shall be temporarily supported as to retain its correct position in the forms during the process of placing and consolidating the concrete. All temperature values are in degree centigrade unless specified. They should stimulate fundamental change in this process in order to yield significant improvements in the cost, delivery time and the quality of these structures. 3. 9. When consolidation of concrete is by rodding procedure, the concrete shall be placed in mould at 3 layers of equal height. 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. A summary of the modeling assumptions used in the analysis. g. Chloride-induced corrosion will further require high-pressure washing with clean water after blasting to ensure complete removal of the corrosive elements. l. time of loading and departure from ready-mix plant FROM THE EUROPEAN CONCRETE BUILDING PROJECT During the casting, periodic checking of the verticality and stability of formworks shall be done. Land Surveyor 1. 6. All steel reinforcement to be used shall be from an approved manufacturer. The tag shall show the manufacturer’s test number and lot number and other applicable data that will identify the material with the certificate issued for that lot of steel. 15. 6. Prior to commencing any large pour concrete placement (generally > 1m section), the Contractor shall submit a Thermal Control Plan to the Engineer for approval for each mass concrete structure component. 9. V.3.1 General Criteria 4. Where permission for welding is given by the Engineer, the following shall apply: c. With clean water. 2. Such notice shall provide details of the concreting operation including: 1. But prior to this, ensure that approved bonding agent is applied. V.5.3.4.5 Tolerances He looks after constructing a House, Concrete, Material, Repairs, MEP etc. a. Their design must be checked before construction. a. Disfigure permanently exposed surfaces Cast-in-place concrete is a common type of building material for commercial structures and residential homes alike. Plug the previously injected holes with temporary hardwood plugs. In no event shall the depth of the concrete in one layer exceed 80% of the length of the poker vibrator head, and the layer thickness shall always be determined after considering the compaction procedure. All embedded Secs shall be of stainless steel Grade 316L. 3. a. Pouring side: H. Sealant 2. Modern Methods of Construction (MMC) – … 1. 13. V.5.2.3 Concreting of Retaining Wall and Vertical Structures 12. Materials 13. V.5.2.1 General He also leads the, & 3 IN 1 software first in industry for contractor’s billing. Tie Wires 1.6 mm 2. 2. Precast concrete construction is quick as it can be installed immediately and there is no waiting for it to gain strength. Rod each layer 25 strokes. Curing Concrete dropped into place shall be dropped vertically. Haulage distances should be kept to a minimum. 11. If the work does not meet the specified requirements of overall process of precast Pre-Start Safety Briefing Arrangements, Method Statement for Plastering – Architectural Finishings – QA/QC Construction, What are Method Statement in Construction Industry and Flowchart & Guide on How to Write the Procedure? At present, the expenditure on labour (preparation and dismantling of formwork, reinforcing, and casting and finishing of concrete) almost equals the cost of … 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. This grid of beams and columns is typically constructed on a concrete foundation and is used to support the … This may require the use of a holding tank, with provision for gentle agitation to maintain fluidity; Ready Mix Supplier – xxxxx (Name of Supplier goes here) Steel Fixers 12. The groove shall be clean and dry at the time of applying the primer and joint sealant. Preparation for protecting and curing the concrete should be readily available on site. c. On all other elements They should be inserted vertically inside the concrete. P. Curing Compound 7. 3. Where concrete surfaces are to receive waterproofing membranes, they shall be prepared in accordance with the waterproofing manufacturers written recommendations. 2. We are an independent family run company specialising in groundwork, concrete works, agricultural and industrial buildings. The elements have to be designed for handling stress or loads during handling, which may or may not increase steel. 3. When concrete is placed in vertical members, walls, columns and the like, the lifts of concrete shall finish level or, in sloping members, at right angles to the axis of the members, and the joint lines shall match features of the finished work, if possible, or be formed by grout checks. The Work Permits and Operator Certificates shall be compiled and files for reference by authorized personnel. Summary of Injection and Repairing for the Wet Cracks: V.5 Concrete Casting All connection shall be applied with sealant to minimize bleeding of concrete during pouring. Waterproofing Materials contaminants prior to batching. 3. c. Temporary traffic signs, barriers and flagmen will be deployed to control traffic flow in accordance HSE Plan-Traffic Management & Roadwork Construction. 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 Surveyor shall be responsible for the control and monitoring of the final levels of blinding concrete. c. High Visibility Vest Project Manager Apply approved material at the bottom of the flange along the perimeter. V.11.2.8 Dry / Damp cracks, early thermal contraction cracks, drying shrinkage Cubes shall be numbered consequently and marked: 2. The formwork should be rigid and tight to the substrate to prevent grout loss. b. 7. The paste should be forced into the substrate to ensure proper bondage. V.11.2.6 Concrete repair work in generally re-profiling over large area where f. The mixed grout should be poured only from one side of the void to eliminate the entrapment of air or surplus pre-soaking water. It may be necessary to break out the concrete beyond the original repair area in order to achieve this; Concrete shall not be moved from one place to another by means of vibrator. The Surveyor shall prepare the layout by establishing the required elevation such as slab soffits, elevation of top bars, top of slab, etc. : xxxxxxx Placing of the following layer shall not be commenced until compaction of the previously placed layer has been completed in the area, where the next layer is to be placed. V.8.3 Concrete Placing and Curing 4. 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. The date and time for the Engineer to inspect the formwork and fixed Concrete casting shall only be terminated at every construction/expansion joint. On completion of the grouting operation, all exposed areas of grout should be thoroughly j. 1. V.8.5 Reducing Heat Gain Increase rate of Slump loss, tendency to add water at job site; elements are casted on site in the open environment and hence it is difficult to control mix, placement and curing. V.10 Sampling and Testing 11. IX. In-situ Columns Many structures will require in-situ columns. V.5.2.4 Mass Concreting 7. 5. 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. Assist Surveyors in taking measurements, record measurements manually or electronically, and peg out boundaries. Same with the method statement for block works/masonry, this presentation can be formatted to help the Technical Department/Construction Department/QA Department prepares the required method statement for concrete works which is being submitted to Consultant for review and approval as part of project’s QA documentation. b. positive measures are taken to remove it completely from those areas which are to 11. 6. 3. Erected a minimum of 150 mm higher than the underside of the base plate. Substrate Priming One side of formwork shall be installed to ensure installation of steel in the form of steel cages shall be done accurately. In situ concrete offers a monolithic architectural character. Probable Cause/s: Insufficient casting interval time, poor vibration Holes larger than 10mm diameter using snap ties is not permitted. 8. b. Mixing and application shall strictly follow the approved product data. 2. General, X. Analysis shall be performed to determine the maximum allowable temperature differentials between the hottest point of the concrete and the exterior faces. Baseline Program, All concrete works shall comply fully with the applicable laws, client’s requirements and specification as per Project Specification. Unless otherwise specified in the technical data sheets, curing shall be carried out for 2 ~ 3 days. No loading in excess of the design loading shall be placed on any portion of the structure without the written permission of the Engineer. The installation of formworks and reinforcement shall be done with the strict supervision to ensure damage to the installed waterproofing shall be minimized and/or in any case of damage, location shall be reported to do the repair works prior to move on to the next stage of work. k. water content TheContinue Reading Method 1 Immediately prior to application of approved material, the prepared substrate should be blown clean with oil-free compressed air. Increase the curing period; Shading of aggregates in feed storage shall be implemented by the Concrete Supplier to ensure consistency of aggregates used for concrete in Hot Weather conditions; c. If flanged injection ports are used, using approved material as the bonding agent. Reference Documentation It should meet the requirements of EN 1992-1-1. 4. The fabricator will furnish three copies of a certification which shows the batch number or numbers from which each size of bar in the shipment was fabricated. 9. Skilled labours are required at construction site. 1. The ends of all tying wires shall be turned into the main body of the concrete and not allowed to project towards the surface. To liaise with the Site Engineer and Supervisor for the work execution. Contractor shall be responsible for QC of overall process according to quality plan. Joint sealant shall be applied between the minimum and maximum drying times of the primer recommended by the manufacturer. Construction Manager Cast-in-place concrete dates back to early experiments by Thomas Edison. Any embedded items shall be placed referring to approved design. 1. Curing shall be followed according to manufacturer’s specifications. The reinforcement shall be covered to ensure protection from wind-blown dust, condensation and other deleterious materials. Probable clause/s: high water-cement ratio, insufficient vibration, inappropriate curing or nature of concrete soffit repairs), should further include provision for air venting to release trapped air as pouring proceeds. Steel Reinforcement b. Transport, place, consolidate and finish with least delay; V.8.4 Controlling Reducing Temperature of Constituent Materials Concrete shall be thoroughly compacted in its final position within 30 minutes of discharge from the mixer. At construction joint location the surface of the completed concrete shall be prepared by spraying, wire brushing or chipping so that it is free from all laitance, scum and loose material and shows a slightly roughened texture and tips of the coarse aggregate exposed. 7. Epoxy d. shop drawing reference number 12. Curing shall be done using approved curing compound and in accordance with section V.7 of this document. 3. 1. Subsequently, steel bars are tightened together after its design. Civil Engineering consistency of cement used for concrete in hot weather conditions 3. 2. V.11.2.3 Form Tie Rod / Bolt Holes and Voids Plastic Spacers g. Using a nail or piece of wire inserted through the port, locate the port over the center of the crack. g. Accident reporting requirements. The meeting shall be scheduled prior to the beginning of the work and before any Sub-contractor starts on the project. QA/QC Engineer The Site Engineer and the QC will monitor the concrete placement and will notify the Site Agent of any unacceptable materials or operations for action. b. xxxxx (Name of Subcontractor goes here), II. 1. Traditionally, concrete floor systems are reinforced using bars, fabric or using high-strength strand which is … 2. Waterstops 11. In the cast-in-situ concrete, column, slab etc. 8. e. Oil and grease deposits are best removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser; 7. 7. c. The end of the injection hose shall be attached to the lowest packer on vertical cracks or to either end of horizontal cracks. Cast-in-situ Concrete Construction of Slab. 7. In situ concrete slab When the ground conditions are poor, a normal ground bearing slab is unsuitable. 2. 9. Before ordering reinforcing steel, the Contractor shall prepare the reinforcement schedules based on design drawing and secure approval of the Engineer. Definitions Summary of Application/Injection The sealant shall be dispensed into the groove as soon as practicable after mixing and within the time recommended by the manufacturer. V.6 Compaction 8. Immediately before grouting takes place, any free water should be removed. How to Choose the Perfect Doors for Your Home? Cracks The Surveyor shall monitor levels, verticality, and alignment of structure throughout the work. Attention to full and proper preparation of the substrate is essential for complete repair adhesion; 4. V.5.2.2 Foundation Concreting Internal surface of external walls; Rollers and plate compactors will be deployed at the formation level to carry out compaction works, as necessary. 12. Construction Manager f. Where multiple layers are to be applied, the surface of intermediate layers should be ‘scratch- keyed’ and cured with wet hessian. • 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. APPENDIX G: Approved Material Submittals, I. f. The slope of chute or pressure of pump shall allow the flow of concrete without segregation. 9. It is essential that the machine mixing capacity, material supply, and labor availability is adequate to enable the grouting operation to be carried out continuously. k. In adverse conditions (e.g. Skilled and technical contractor is required for construction of the precast concrete structure. is available on site. 6. Each sampling will consist of at least 7 specimen cubes; 2 tested at 7 days and 3 tested at 28 days as per relevant specification. c. The equipment operators shall possess the required licenses and certificates 11. APPENDIX D: Inspection & Testing Plan (ITP) Pre-Start Safety Briefing Arrangements 2. 6. It should be capable enough to maintain the correct position, shape and profile of structure. a. 3. While cast-in-situ concrete is cast in its actual location, precast concrete is cast at another location, either at the building site or in a factory, and is then lifted to its final resting place and fixed securely. Protect concrete against moisture loss at all times, during production, transportation, placement and compaction; Emergency procedure. 1. Interviews with relevant members of the project teams were used as the main data collection technique. 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. Vibration of concrete shall not be applied by way of the reinforcement. All operations from the moment cooled materials are removed from their controlled storage environment (at the beginning of the batching process) to the moment the concrete is placed should be completed as quickly as possible. For post cooling systems after the peak internal temperature is reached, including the maximum cooling rate at which cracking will not occur. 14. This is most effectively achieved by proprietary blast media; with particular attention required to both the rear face of the bars and the edge of the repair. Precast concrete is a form of construction, where concrete is cast in a reusable mould or “form” which is then cured in a controlled environment, transported to the construction site and lifted into place. Alternatively where this preparation proves impracticable the hardened surface skin and laitance shall be removed. Stainless steel dowel bars shall be grade 1.4401 (316) or equivalent when required at the movement joints. The Contractor shall compensate and correct for the misaligning effect of temperature, draw from welding, bolting or erection sequence or grouting. 4. 6. Vibrator shall penetrate 100mm into the previous layer. c. Hose must never reach into the concrete. V.3 Formwork is a Civil Engineer who has earned Bachelor’s degree in 2005. c. If crack depth is beyond 25mm, follow procedure outline below for injection method treatment. reinforcement detail drawings to provide adequate rigidity and to ensure that the specified cover and fit within the mould are achieved. Continue with the succeeding ports until the grouting process completed; All joints shall be prepared following the specifications mentioned in section V.5.3. a. To conform to the requirements of this specification, strength tests representing each class of concrete must meet the following requirements: b. Curing shall be started immediately after removal of formwork for all required surfaces using approved curing compound. t. Actual slump and temperature measurement Any defect in concrete shall be recorded including the severity of defect. V.7 Curing Formwork must comply with the requirements of BS 5975, EN 1992-1-1 and CIRIA Report 136 Formwork Striking Times. Helpers/Laborers a. Wastage of material is less as only the required length is cast2. Smith, in Marine Concrete Structures, 2016. 11. Dampproofing Materials 9. Records of delay due to dust storms to be prepared. 2. 2. Concrete surfaces within 75 mm of the edges of the joint shall be masked with tape before the primer is applied and until the sealing of the joint is complete. c. high solar radiation Resources They shall ensure the reinforcement embedded fittings and forms are kept in position as work proceeds. To attached permit to work on Appendix c. VIII permitted only if the already placed concrete is a must in situ concrete frame construction! As specified in the approved product data and Supervisor for the project as a whole, summarising overall. Agitators clean and with a mallet ( diameter ) and mass has appeared the. Manufacture, strengths and other cementations materials away from the project use your products within the organization kickers be... Compound then reapplied in layers of equal height exposed concrete face shall be marked on the tops of meeting. Misaligning effect of temperature, peak differential temperatures and at any joints in slab and beam shall be compacted! 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To conform to the surface, installation of steel cages shall be recorded including the maximum hole size shall removed! All required surfaces using approved curing compound and in accordance with manufacturer ’ s data sheet firmly...