.2 Related Work Specified Elsewhere:.1 Section Substitutions..2 Section Cast-In-Place Concrete

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1 DIVISION 3 CONCRETE - SECTION GENERAL 1.1 Description.1 The Work of this Section as indicated in the Drawings or Specifications includes Bonded Concrete Topping over core slab and all other of Concrete s..2 Related Work Specified Elsewhere:.1 Section Substitutions.2 Section Cast-In-Place Concrete.3 Division 9 - Finishes (Various ing Sections).4 All other Sections and Drawings to be reviewed 1.2 Quality Assurance.1 The Company performing the Work of this Section must have a minimum of five (5) years recent experience in similar installations..2 Workers must be skilled and each have a minimum of five (5) years experience. 1.3 Reference Standards.1 ASTM C309, Specification for Liquid Membrane Forming Compounds for Curing Concrete..2 CAN/CSA-A23.1-M90/A23.2-M90, Concrete Materials and Methods of Concrete Construction, Specification for Liquid Membrane Forming Compounds for Curing Concrete. 1.4 Tolerances.1 Levels of finished concrete floors and floors under finished flooring applications shall be within 1/4 (6mm) of established elevations in any 20-0 (6000mm) square area and sufficiently even to contact a 10-0 (3000mm) long straightedge with a tolerance of 1/4" (6mm). RAA Township of South Frontenac Fire & Rescue Station No

2 1. GENERAL - Continued 1.5 Co-Operation 1.6 Job Conditions 2. PRODUCTS 2.1 Materials.1 Ensure that concrete supplied for slabs does not contain admixtures which will be incompatible with floor hardener materials..1 Perform the Work only when environmental conditions are as specified in CAN/CSA-A23.1-M90/A23.2-M90..2 Ensure that adequate temporary heating is provided as required to perform the Work in cold weather..3 Provide adequate moisture, sun shades and wind barriers to prevent too rapid drying of concrete during hot weather..4 Ensure that finished concrete floor areas are protected from abrasion from foot or wheeled traffic and from damage caused by spillage of oil or other harmful materials..1 Concrete Materials: In accordance with Section Cast-In-Place Concrete..2 Hardener Aggregate: Emery grit, Durafax No. 1, or approved alternate..3 Curing Sheet: 2 mil. Polyethylene or waterproof paper..4 Sealing Compound: Excel Clear Waterproofing. For use only where concrete floor is not to be painted..5 Curing Compound: Where concrete floors are to be left exposed, unpainted and concrete cannot be water cured; use only non-volatile curing compounds conforming to ASTM C309 such as 'Planicure 65' by Mapei or approved alternate..6 Grout: Non-shrink grout In-Pakt by Sternson Limited or approved alternate..7 Stain: Use Chromax integral stain (or apporved alternate) added to concrete mix by concrete supplier. Colour to Architect s Later Selection. RAA Township of South Frontenac Fire & Rescue Station No

3 3. EXECUTION 3.1 Examination.1 Before commencing the Work of this Section, ensure that surfaces are acceptable to receive and maintain concrete finishing and that specified installation will be achieved..2 Commencement of the Work will denote acceptance of conditions and surfaces. 3.2 Bonded Concrete Topping.1 Conform to CAN/CSA-A Strength of concrete and mix to be in accordance with CAN/CSA-A Roughen concrete slab surface before placing topping. Use mechanical means to roughen slab, as may be required to ensure a bond with topping..4 Place each section in one operation..5 Take special precautions against plastic shrinkage cracking, in accordance with /CSA-A23.1, Clause 21, whenever rapid drying of topping may occur..6 Provide control joints in topping directly over control joints in slabs, with 3/16" (5mm) saw to depth of 2/3 topping thickness no later than 24 hours after placing. After 24 hours clean and install filler in joint. 3.3 Concrete.1 Immediately after placing, screed and darby concrete before any water has bled to the surface..2 Strike off concrete level to screeds leaving no low spots. If vibrators are used on straightedge ensure that concrete is not over vibrated causing segregation and collection of water and fines over the surface..3 Smooth concrete to an even plane with a darby or bull float and leave until bleed water and water sheen has disappeared. RAA Township of South Frontenac Fire & Rescue Station No

4 3. EXECUTION 3.3 Concrete - Continued.4 Proceed with finishings only when concrete has hardened sufficiently to support a worker with only slight footprint left on the surface..5 Finish concrete surface with power float or with metal hand floats in areas inaccessible to power floats. Floating shall embed large aggregate below the surface, consolidate mortar at the surface, provide even planes with no bumps or depressions, remove marks from edging and prepare the surface for further specified finishing. Do not bring water and fine material to the surface by overworking..6 Steel trowel floated surface with power trowels or hand trowels in areas inaccessible to power trowels. Proceed with trowelling only when there is no sheen on the surface. Repeat trowelling until the surface is brought to approved finish. Allow sufficient time between trowellings for additional set of concrete..7 Draw a soft bristled brush over steel trowelled surfaces to provide a very light broom surface where a non-skid floor is required..8 Finish floor surfaces shall be level dense with minimal aggregate showing and free of blemishes. 3.4 Hardened s.1 Apply hardener aggregate to floor surfaces as indicated in the Drawings or Specifications in two shakes, half of the aggregate for each shake..2 Apply the first shake when the concrete is firm enough to support worker and equipment and when standing water is present. Mechanically float aggregate into the surface..3 Apply the second shake and mechanically float as specified above for finishing..4 Apply total amount of aggregate at a rate of 26 ounces per square foot (3kg/sq m) of floor area. RAA Township of South Frontenac Fire & Rescue Station No

5 3. EXECUTION - Continued 3.5 Curing 3.6 Patching & Refinishing.1 Cure Concrete as specified in CAN/CSA-A23.1-M90/A23.2-M90 and by methods specified in 3.7 Concrete Schedule. Ensure that no curing compound is used which is detrimental to the bond of bedding for finish flooring or finish flooring materials. Where concrete curing compounds are used, sandblast floor finish after concrete is fully cured..1 Before the completion of project, patch and refinish defective surfaces to match surrounding areas with no discernable variation in appearance. 3.7 Concrete Schedule.1 Rough and Similar Horizontal Surfaces: Screed surfaces to an even, level or sloped surface to elevations as indicated in the Drawings or Specifications..2 : Ensure that the floor finishes are provided as indicated in the Drawings or Specifications. Verify with those performing the Work of applicable Sections that the proposed finishing is satisfactory for the Work they apply to the floors..3 Steel Trowel Finish: Smooth finish by hand and machine float, free from laitence, excessive water, trowel marks, blemishes and ridges for the Work of Section Ceramic Tile, Section Terrazzo, Section Slate ing, Section Resilient Sheet ing, Section Carpeting or Section Painting..4 Exposed s: Give floors exposed to view a steel trowel finish to provide a hard, smooth, dense surface free from laitence, excessive water, trowel marks, blemishes and discolouration. s to be sealed with one (1) coat of sealing compound. END OF SECTION RAA Township of South Frontenac Fire & Rescue Station No

A. Submittal Procedures: See Article 13 of the General Conditions.

A. Submittal Procedures: See Article 13 of the General Conditions. SECTION 321313 - CONCRETE PAVING PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Driveways. 2. Roadways. 3. Parking lots. 4. Curbs and gutters. 5. Walks. B. Proposed Substitutions: See Article 2,