USACE / NAVFAC / AFCESA / NASA UFGS-03 53 14.00 20 (April 2006) ------------------------------ Preparing Activity: NAVFAC Replacing without change UFGS-03010N (August 2003) UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated January 2009 SECTION 03 53 14.00 20 LIGHT REFLECTIVE NONFERROUS METALLIC AGGREGATE FLOOR SYSTEM 04/06 NOTE: This guide specification covers the requirements for light reflective, non-oxidizing, dry shake surface hardener for concrete hangar floor finish. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information. Remove information and requirements not required in respective project, whether or not brackets are present. Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet. Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR). PART 1 GENERAL 1.1 REFERENCES NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title. Use the Reference Wizard's Check Reference feature when you add a RID outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates. References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process. The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only. ACI INTERNATIONAL (ACI)ACI 305R(1999; Errata 2006) Hot Weather ConcretingACI 308.1(1998) Standard Specification for Curing ConcreteACI 308R(2001; R 2008) Guide to Curing ConcreteASTM INTERNATIONAL (ASTM)ASTM C 1315(2008) Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing ConcreteASTM C 309(2007) Standard Specification for Liquid Membrane-Forming Compounds for Curing ConcreteASTM C 779/C 779M(2005) Abrasion Resistance of Horizontal Concrete SurfacesASTM C 944/C 944M(1999; R 2005e1) Standard Test Method for Abrasion Resistance of Concrete or Mortar Surfaces by the Rotating-Cutter MethodILLUMINATING ENGINEERING SOCIETY OF NORTH AMERICA (IESNA)IESNA LM-44(1990) Approved Method for Total and Diffuse Reflectometry1.2 SUBMITTALS NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control. A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractor’s Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project. For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the "G" designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District Office (Engineering Division or other organization in the District Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office. Codes following the "G" typically are not used for Navy, Air Force, and NASA projects. Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are [for Contractor Quality Control approval.][for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES: _{SD-03 Product Data Non-oxidizing metallic aggregate} surface hardener _{G SD-04 Samples Sample installation Material sample SD-07 Certificates} Statement of _{alternates G} 1.2.1 _{Sample Installation} A minimum of 100 square feet of the [hangar] [______] floor slab shall be finished in a location as directed by the Contracting Officer. Color, texture and installation procedures are of prime importance. After approval by the Contracting Officer, the Contractor shall maintain the same controls and procedures throughout the installation process. Before acceptance, all work will be compared to the sample area. 1.2.2 _{Material Sample} Samples of materials, color, and finish type shall be submitted to the Contracting Officer for approval. 1.2.3 _Alternates Submittals for an alternate product shall contain the following from an independent laboratory. Unit weight, abrasion resistance test in accordance with ASTM C 944/C 944M and ASTM C 779/C 779M and percentage nominal reflectivity utilizing IESNA LM-44. Any product submitted, whose warranty contains a disclaimer limiting liability to the purchase price of the material, will be disqualified. 1.3 DELIVERY AND STORAGE Product shall be delivered in sealed moisture resistant packages. Protect packages from damage. Store in an enclosed area. Contractor shall replace damaged packages with new packages. Manufacturer's information regarding date of manufacture, shelf life and date of purchase shall be provided no later than the date delivered on site. Products shall be identifiable by lot numbers. 1.4 WARRANTY The manufacturer shall provide a standard warranty stating that the material is free of defects and that when used by competent persons in accordance with current published recommendations, the product will perform as specified herein. The manufacturer's standard warranty shall not contain any disclaimers, limiting their responsibility to the purchase price of the material. The manufacturer shall state in the warranty that they shall be willing to contribute to replacing defective materials, as determined by accepted test methods. 1.5 QUALITY CONTROL The Contractor shall hold a meeting to review the detailed requirements for the floor, including the concrete mix design, placing techniques, finishing techniques including surface levelness, floor hardener application procedures, curing and the equipment required for these procedures. The pre-slab meeting agenda shall be prepared by the Contractor and submitted to the attendees at least one week in advance of the meeting. All parties involved in the floor system installation shall be required to attend. The Architect-Engineer's representative and the manufacturer's technical representative shall be present at the conference. The Contractor shall notify both at least 10 days prior to the scheduled date of the conference. Minutes of the meeting shall be recorded, typed and printed by the Contractor and distributed by him to all parties concerned within five days of the meeting. PART 2 PRODUCTS NOTE: Coordination must be provided with the person editing Section 03300N, "Cast-in-Place Concrete" to ensure requirements of ACI 117, ACI 212.3R, ACI 301/301M, ACI 302.1R, ACI 304R and ACI 318/318M are included. 2.1 CONCRETE Concrete materials shall be as specified in Section 03 30 00 CAST-IN-PLACE CONCRETE, in addition to items required by this section and the following: a. The concrete mix, including admixtures and plasticizers, shall be in strict compliance with the aggregate surface hardener manufacturer's recommendations and shall be approved by the Contracting Officer and the manufacturer's technical representative prior to the placement of concrete. 2.2 NON-FERROUS, _{NON-OXIDIZING METALLIC AGGREGATE}, DRY-SHAKE SURFACE HARDENER The surface hardener system shall consist of specially processed, non-ferrous, malleable, non-oxidizing, metallic aggregates, specially graded cementitious binder, plasticizer, and water-reducing admixtures, formulated and processed under the stringent quality control of the manufacturer. "Lumiplate" as manufactured by ChemRex, a subsidiary of Master Builder Technologies and "Diamond Plate" as manufactured by The Euclid Chemical Company comply with these specifications. The hardener shall be proportioned and sealed in standard moisture-resistant bags. The manufacturer shall guarantee their aggregate to be free of rust, corrosive materials, oil, petroleum, or other water-base materials, when delivered. The manufacturer shall replace any material found to contain any such materials, or any other material which is deemed unsatisfactory. The manufacturer shall provide a full-time technical representative, qualified in designing and adjusting concrete mixes, to assist in the application of the aggregate surface hardener system. 2.3 SURFACE EVAPORATION RETARDANT A mono molecular surface evaporation retardant film, as recommended by ACI 305R and ACI 308R, shall be provided for use under drying conditions, due to high concrete and/or ambient temperatures, low humidity, high winds, and so forth. This includes work in heated interiors during cold weather, to aid in the maintaining of concrete moisture during the early placement stages of plastic concrete. Retarder shall be certified by the manufacturer to be compatible with the surface hardener and shall be provided in accordance with the manufacturer's recommendations. 2.4 CURING AND SEALING Curing and sealing materials and procedures shall be as recommended by the manufacturer of the aggregate surface hardener system and shall comply with ASTM C 309 or ASTM C 1315. PART 3 EXECUTION 3.1 CONCRETE PLACEMENT For concrete placement, refer to Section 03 30 00 CAST-IN-PLACE CONCRETE in addition to items required by this section and the following: a. Maximum slump shall be 127 mm5 inches, when peak ambient temperatures are anticipated to be in excess of 18.33 degrees Celsius65 degrees Fahrenheit, and shall be no greater than 96.2 mm4 inches, when such temperatures are below 29.4 degrees Celsius85 degrees Fahrenheit. Water reducing admixtures can be used to aid in workability without affecting dry shake hardener. b. Maximum total air content shall not exceed 3 percent. c. Calcium chloride or set accelerating admixtures, containing calcium chloride, shall not be used. d. Water-reducing admixture shall be used. Provider must certify that the water reducer will not contribute to or cause increased air content. Place base slab between screed points to minimize handling. Move concrete into place with square-tapped shovels; do not use rakes. Vibrators, when used, shall be inserted and withdrawn vertically. Concrete shall be struck to the specified level. Concrete shall be further leveled and consolidated with wood bull float or wood darby. This shall be completed before free moisture rises to the surface (bleeding). Floating shall begin adjacent to columns, forms, and walls 3.1.1 Application of Surface Hardener Apply first shake to floated concrete adjacent to forms, entry ways, columns and walls, where moisture will be lost first. Apply two-thirds of the specified total shake immediately following the floating of total area. Material shall be applied at a minimum rate of 9.76 kg/square meter2 pounds per square foot of slab. Bleed water shall not be present during or following the application of this shake. Distribute Evenly. DO NOT THROW THE SHAKE. Wood bull floats can be used as soon as the shake has absorbed moisture (indicated by the darkening of the surface). Float just sufficiently to bring moisture from base slab through the shake. Finishing machines with float blades shall be used to "open" the surface, prior to the application of the remaining one-third of the total specified shake, and shall be used to incorporate this second shake. Surface shall be further compacted by a second mechanical floating, if time and setting characteristics of the concrete will allow, without removing of the cement surface paste from the metallic aggregate system. AT NO TIME SHALL WATER BE ADDED TO THE SURFACE. As surface further stiffens, indicated by loss of sheen, it shall be hand or mechanically troweled with blades relatively flat. Trowel blades should be run as slowly as possible, to achieve the desired finish. Excessive trowel blade speed will "burn" or darken the floor surface resulting in a possible loss of the desired even surface color. All marks and pinholes shall be removed in the raised trowel operation. DO NOT OVER FINISH. Do not burnish trowel. Type or texture of surface shall conform to job mock-up. 3.1.2 Field Service During the initial periods of installation, manufacturer of surface hardener shall provide, at no cost, the service of a trained, full-time employee of the manufacturer, to aid in securing the proper use of all prescribed floor finish products. A minimum of 21 days notice shall be given by the Contractor, to the manufacturer, to arrange a "pre-job conference, related to application procedures, and a minimum of 7 days notice shall be given, prior to installation of the product. At discretion of the Contracting Officer, the manufacturer shall videotape pre-job conference and random placement of surface hardener. Video tape shall be supplied by the Contractor. Original video tape shall be delivered to the Contracting Officer, upon completion of the finish operations. 3.1.3 Curing and Protection (Water Based Wax Emulsion) Refer to ACI 308.1. Floors, finished with the non-rusting, metallic-aggregate surface hardener, shall be cured as recommended by the manufacturer of the surface hardener. When high efficiency membrane curing compound is recommended, apply the membrane curing compound immediately after the floor surface has hardened sufficiently, so surface will not be marred by the application. Compound shall be applied uniformly, over the entire surface, to meet the required moisture retention of ASTM C 1315, at a maximum rate of 6.136 square meters per liter250 square feet per gallon. When dry, the coating shall be protected from droppings of plaster, paint, dirt, and other debris, by a covering of scuff-proof building paper. Adequate provision shall be made for maintaining the concrete temperature at 50 degrees F., or above during the curing period. Floor shall remain covered and be kept free of traffic and loads for at least 10 days after completion. At the direction of the Contracting Officer, the curing compound shall be removed between 2 and 4 weeks after placement. 3.2 Cleaning and Surface Preparation After the aggregate surface hardener system has cured for 28 days, the Contractor shall clean and buff the floor surfaces in accordance with the manufacturer's recommendations. The cleaning and surface preparation shall be performed to remove projections that permit soil and foreign bodies to embed into the floor and to permit easier cleaning of a less porous, more densified concrete surface.