1、05-01-12 03 30 53 - 1 SECTION 03 30 53 (SHORT-FORM) CAST-IN-PLACE CONCRETE SPEC WRITER NOTES: 1. Use this section for small projects where cast-in-place concrete is not extensive. Use Section 03 30 00, CAST-PLACE-CONCRETE, as a reference in the preparation of this Section for items not covered herei
2、n. 2. Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION: This section specifies cast-in-place structural concrete and material and mixes for other concrete. 1.2 RELATE
3、D WORK: A. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY SERVICES. B. Concrete roads, walks, and similar exterior site work: Section 32 05 23, CEMENT AND CONCRETE FOR EXTERIOR IMPROVEMENTS. 1.3 TOLERANCES: A. ACI 117. B. Slab Finishes: ACI 117, F-number m
4、ethod in accordance with ASTM E1155. 1.4 REGULATORY REQUIREMENTS: A. ACI SP-66 ACI Detailing Manual B. ACI 318 - Building Code Requirements for Reinforced Concrete. 1.5 SUBMITTALS: A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Concrete Mix Design. C. Sho
5、p Drawings: Reinforcing steel: Complete shop drawings. D. Manufacturers Certificates: Air-entraining admixture, chemical admixtures, curing compounds. 1.6 APPLICABLE PUBLICATIONS: A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text
6、 by basic designation only. B. American Concrete Institute (ACI): 117R-10 Tolerances for Concrete Construction and Materials Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 2 211.1-91(R2009) Proportions for Normal, Heavyweight, an
7、d Mass Concrete 211.2-98(R2004) Proportions for Structural Lightweight Concrete 301-11 . Specification for Structural Concrete 305R-10 Hot Weather Concreting 306R-10 Cold Weather Concreting SP-66-04 ACI Detailing Manual 318/318R-11 Building Code Requirements for Reinforced Concrete 347R-08 Guide to
8、Formwork for Concrete C. American Society for Testing And Materials (ASTM): A185-07 Steel Welded Wire, Fabric, Plain for Concrete Reinforcement A615/A615M-09 Deformed and Plain Billet-Steel Bars for Concrete Reinforcement A996/A996M-09 Standard Specification for Rail-Steel and Axle-Steel Deformed Ba
9、rs for Concrete Reinforcement C31/C31M-10 Making and Curing Concrete Test Specimens in the Field C33-11 . Concrete Aggregates C39/C39M-10 Compressive Strength of Cylindrical Concrete Specimens C94/C94M-10 Ready-Mixed Concrete C143/C143M-10 Standard Test Method for Slump of Hydraulic Cement Concrete
10、C150-09 Portland Cement C171-07 Sheet Material for Curing Concrete C172-10 Sampling Freshly Mixed Concrete C173-10.Air Content of Freshly Mixed Concrete by the Volumetric Method C192/C192M-07 Making and Curing Concrete Test Specimens in the Laboratory C231-10 Air Content of Freshly Mixed Concrete by
11、 the Pressure Method C260-10 Air-Entraining Admixtures for Concrete C330-09 Lightweight Aggregates for Structural Concrete C494/C494M-10 Chemical Admixtures for Concrete C618-08 Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete D1751-08 . .Preformed Expansion Joint Fillers for Co
12、ncrete Paving and Structural Construction (Non-extruding and Resilient Bituminous Types) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 3 D4397-10 . Polyethylene Sheeting for Construction, Industrial and Agricultural Applications
13、 E1155-96(2008) . Determining FF Floor Flatness and FL Floor Levelness Numbers PART 2 - PRODUCTS 2.1 FORMS: Wood, plywood, metal, or other materials, approved by Resident Engineer, of grade or type suitable to obtain type of finish specified. 2.2 MATERIALS: A. Portland Cement: ASTM C150, Type I or I
14、I. B. Fly Ash: ASTM C618, Class C or F including supplementary optional requirements relating to reactive aggregates and alkalis, and loss on ignition (LOI) not to exceed 5 percent. C. Coarse Aggregate: ASTM C33, Size 67. Size 467 may be used for footings and walls over 300 mm (12 inches) thick. Coa
15、rse aggregate for applied topping and metal pan stair fill shall be Size 7. D. Fine Aggregate: ASTM C33. E. Lightweight Aggregate for Structural Concrete: ASTM C330, Table 1 F. Mixing Water: Fresh, clean, and potable. G. Air-Entraining Admixture: ASTM C260. H. Chemical Admixtures: ASTM C494. I. Vapo
16、r Barrier: ASTM D4397, 0.25 mm (10 mil). J. Reinforcing Steel: ASTM A615 or ASTM A996, deformed. See structural drawings for grade. K. Welded Wire Fabric: ASTM A185. L. Expansion Joint Filler: ASTM D1751. M. Sheet Materials for Curing Concrete: ASTM C171. N. Abrasive Aggregates: Aluminum oxide grain
17、s or emery grits. SPEC WRITER NOTE: Use liquid chemical floor hardeners only to improve an existing soft or dusting slab. A properly finished and cured slab does not need this treatment. This is an old technology. Liquid Densifier/Sealers are superior. O. Liquid Hardener and Dustproofer: Fluosilicat
18、e solution or magnesium fluosilicate or zinc fluosilicate. Magnesium and zinc may be used separately or in combination as recommended by manufacturer. P. Liquid Densifier/Sealer: 100 percent active colorless aqueous siliconate solution. Q. Grout, Non-Shrinking: Premixed ferrous or non-ferrous, mixed
19、 and applied in accordance with manufacturers recommendations. Grout shall show no settlement or vertical drying shrinkage at 3 days or thereafter based on Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 4 initial measurement made
20、 at time of placement, and produce a compressive strength of at least 18mpa (2500 psi) at 3 days and 35mpa (5000 psi) at 28 days. 2.3 CONCRETE MIXES: A. Design of concrete mixes using materials specified shall be the responsibility of the Contractor as set forth under Option C of ASTM C94. B. Compre
21、ssive strength at 28 days shall be not less than / 25mpa / 30 Mpa / (/3000 psi / 4000 psi / ). C. Establish strength of concrete by testing prior to beginning concreting operation. Test consists of average of three cylinders made and cured in accordance with ASTM C192 and tested in accordance with A
22、STM C39. D. Maximum slump for vibrated concrete is 100 mm (4 inches) tested in accordance with ASTM C143. E. Cement and water factor (See Table I): TABLE I - CEMENT AND WATER FACTORS FOR CONCRETE Concrete: Strength Non-Air-Entrained Air-Entrained Min. 28 Day Comp. Str. MPa (psi) Min. Cement kg/m3 (l
23、bs/c. yd) Max. Water Cement Ratio Min. Cement kg/m3 (lbs/c. yd) Max. Water Cement Ratio 35 (5000)1,3 375 (630) 0.45 385 (650) 0.40 30 (4000)1,3 325 (550) 0.55 340 (570) 0.50 25 (3000)1,3 280 (470) 0.65 290 (490) 0.55 25 (3000)1,2 300 (500) * 310 (520) * 1. If trial mixes are used, the proposed mix d
24、esign shall achieve a compressive strength 8.3 MPa (1200 psi) in excess of fc. For concrete strengths above 35 Mpa (5000 psi), the proposed mix design shall achieve a compressive strength 9.7 MPa (1400 psi) in excess of fc. 2. Lightweight Structural Concrete. Pump mixes may require higher cement val
25、ues. 3. For concrete exposed to high sulfate content soils maximum water cement ratio is 0.44. * Determined by Laboratory in accordance with ACI 211.1 for normal concrete or ACI 211.2 for lightweight structural concrete. F. Air-entrainment is required for all exterior concrete and as required for Se
26、ction 32 05 23, CEMENT AND CONCRETE FOR EXTERIOR IMPROVEMENTS. Air content shall conform with the following / table: / tables /: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 5 TABLE I - TOTAL AIR CONTENT FOR VARIOUS SIZES OF CO
27、ARSE AGGREGATES (NORMAL CONCRETE) Nominal Maximum Size of Coarse Aggregate Total Air Content Percentage by Volume 10 mm (3/8 in) 6 to 10 13 mm (1/2 in) 5 to 9 19 mm (3/4 in) 4 to 8 25 mm (1 in) 3 1/2 to 6 1/2 40 mm (1 1/2 in) 3 to 6 TABLE II TOTAL AIR CONTENT AIR CONTENT OF LIGHTWEIGHT STRUCTURAL CO
28、NCRETE Nominal Maximum size of Total Air Content Coarse Aggregate, mms (Inches) Percentage by Volume Greater than 10 mm (3/8 in) 4 to 8 10 mm (3/8 in) or less 5 to 9 2.4 BATCHING & MIXING: A. Store, batch, and mix materials as specified in ASTM C94. 1. Job-Mixed: Concrete mixed at job site shall be
29、mixed in a batch mixer in manner specified for stationary mixers in ASTM C94. 2. Ready-Mixed: Ready-mixed concrete comply with ASTM C94, except use of non-agitating equipment for transporting concrete to the site will not be permitted. With each load of concrete delivered to project, ready-mixed con
30、crete producer shall furnish, in duplicate, certification as required by ASTM C94. 3. Mixing structural lightweight concrete: Charge mixer with 2/3 of total mixing water and all of the aggregate. Mix ingredients for not less than 30 seconds in a stationary mixer or not less than 10 revolutions at mi
31、xing speed in a truck mixer. Add remaining mixing water and other ingredients and continue mixing. Above procedure may be modified as recommended by aggregate producer. PART 3 - EXECUTION 3.1 FORMWORK: A. Installation conform to ACI 347. Sufficiently tight to hold concrete without leakage, sufficien
32、tly braced to withstand vibration of concrete, and to carry, without appreciable deflection, all dead and live loads to which they may be subjected. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 6 B. Treating and Wetting: Treat
33、or wet contact forms as follows: 1. Coat plywood and board forms with non-staining form sealer. In hot weather cool forms by wetting with cool water just before concrete is placed. 2. Clean and coat removable metal forms with light form oil before reinforcement is placed. In hot weather cool metal f
34、orms by thoroughly wetting with water just before placing concrete. 3. Use sealer on reused plywood forms as specified for new material. C. Inserts, sleeves, and similar items: Flashing reglets, masonry ties, anchors, inserts, wires, hangers, sleeves, boxes for floor hinges and other items specified
35、 as furnished under this and other sections of specifications and required to be in their final position at time concrete is placed shall be properly located, accurately positioned and built into construction, and maintained securely in place. D. Construction Tolerances: 1. Contractor is responsible
36、 for setting and maintaining concrete formwork to assure erection of completed work within tolerances specified to accommodate installation or other rough and finish materials. Remedial work necessary for correcting excessive tolerances is the responsibility of the Contractor. Erected work that exce
37、eds specified tolerance limits shall be remedied or removed and replaced, at no additional cost to the Government. 2. Permissible surface irregularities for various classes of materials are defined as “finishes“ in specification sections covering individual materials. They are to be distinguished fr
38、om tolerances specified which are applicable to surface irregularities of structural elements. 3.2 REINFORCEMENT: Details of concrete reinforcement, unless otherwise shown, in accordance with ACI 318 and ACI SP-66. Support and securely tie reinforcing steel to prevent displacement during placing of
39、concrete. 3.3 VAPOR BARRIER: Except where membrane waterproofing is required, place interior concrete slabs on a continuous vapor barrier. A. Place 100 mm (4 inches) of fine granular fill over the vapor barrier to act as a blotter for concrete slab. B. Lap joints 150 mm (6 inches) and seal with a co
40、mpatible pressure-sensitive tape. C. Patch punctures and tears. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 7 3.4 PLACING CONCRETE: A. Remove water from excavations before concrete is placed. Remove hardened concrete, debris a
41、nd other foreign materials from interior of forms, and from inside of mixing and conveying equipment. Obtain approval of Resident Engineer before placing concrete. Provide screeds at required elevations for concrete slabs. B. Before placing new concrete on or against concrete which has set, existing
42、 surfaces shall be roughened and cleaned free from all laitance, foreign matter, and loose particles. C. Convey concrete from mixer to final place of deposit by method which will prevent segregation or loss of ingredients. Do not deposit in work concrete that has attained its initial set or has cont
43、ained its water or cement more than 1 1/2 hours. Do not allow concrete to drop freely more than 1500 mm (5 feet) in unexposed work nor more than 900 mm (3 feet) in exposed work. Place and consolidate concrete in horizontal layers not exceeding 300 mm (12 inches) in thickness. Consolidate concrete by
44、 spading, rodding, and mechanical vibrator. Do not secure vibrator to forms or reinforcement. Vibration shall be carried on continuously with placing of concrete. D. Hot weather placing of concrete: Follow recommendations of ACI 305R to prevent problems in the manufacturing, placing, and curing of c
45、oncrete that can adversely affect the properties and serviceability of the hardened concrete. E. Cold weather placing of concrete: Follow recommendations of ACI 306R, to prevent freezing of thin sections less than 300 mm (12 inches) and to permit concrete to gain strength properly, except that use o
46、f calcium chloride shall not be permitted without written approval from Resident Engineer. 3.5 PROTECTION AND CURING: Protect exposed surfaces of concrete from premature drying, wash by rain or running water, wind, mechanical injury, and excessively hot or cold temperature. Curing method shall be su
47、bject to approval by Resident Engineer. 3.6 FORM REMOVAL: Forms remain in place until concrete has a sufficient strength to carry its own weight and loads supported. Removal of forms at any time is the Contractors sole responsibility. 3.7 SURFACE PREPARATION: Immediately after forms have been remove
48、d and work has been examined and approved by Resident Engineer, remove loose materials, and patch all Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-01-12 03 30 53 - 8 stone pockets, surface honeycomb, or similar deficiencies with cement mortar m
49、ade with 1 part portland cement and 2 to 3 parts sand. 3.8 FINISHES: A. Vertical and Overhead Surface Finishes: 1. Unfinished Areas: Vertical and overhead concrete surfaces exposed in unfinished areas, above suspended ceilings in manholes, and other unfinished areas exposed or concealed will not require additional finishing. 2. Interior and Exterior Exposed Areas (to be paint
