2013 C&MS Section 500- Structures Changes from 2010 to 2013 Construction and Materials Specifications in Structures Items.

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Presentation transcript:

2013 C&MS Section 500- Structures Changes from 2010 to 2013 Construction and Materials Specifications in Structures Items

2013 C&MS Section 500- Structures Shop Drawings A.Contractor Acceptance of Shop Drawings for Items 513 and 515 Two Ohio Registered Engineers seal and sign each drawing. ODOT’s Office of Materials Management is not rating shop drawings for Structural Steel (Supplement 1078) and Pre-stressed Concrete (Supplement 1079) fabricators.

Submittal of Working Drawings and Calculations Working drawings are required from the Contractor when there is: Excavation Bracing, impacting active traffic, or with an exposed height over eight feet, except when a complete design is already shown in the plans C&MS Section 500- Structures

Method of Measurement has been changed. The Department now has the option of measuring excavation on a Lump Sum basis or by the number of Cubic Yards (Cubic Meters), instead of only by the number of Cubic Yards (Cubic Meters).

2013 C&MS Section 500- Structures Changes to ODOT concrete design requirements reflect the changes to QC/QA contractor owned and designed mixes.

2013 C&MS Section 500- Structures Requirements from Supplemental Specifications 888 (pavements) and 898 (structural concrete) have been brought into Items 451, 499, 511,etc. new Item 455- Quality Control Plan, new Supplement Developing & Submitting a Concrete Mix Design, new Supplement 1127 – Pay Factor Determination for Concrete.

2013 C&MS Section 500- Structures QC/QA mix requirements replace Class C Class S, & Class HP with QC1, QC2, QC3 & QC4, and modify the Fast Set (FS) & Medium Set (MS) mixes. Well graded aggregate proportions help eliminate shrinkage, cracking and lower the required amount of cement materials.

2013 C&MS Section 500- Structures Concrete with QC/QA shall be specified for the class of concrete when the total concrete quantity exceeds 150 cubic yards. Class QC3 Special Concrete shall be specified when concrete strengths and/or permeability other than the QC1 or QC2 are necessary.

2013 C&MS Section 500- Structures 507 BEARING PILES – Materials. Concrete, Class C has been changed to Concrete, Class QC RAILINGS – Materials: Replaced Concrete, Class S or Class HP, with Concrete, Class QC PATCHING CONCRETE STRUCTURES – Materials: Replaced Concrete, Class S, with Concrete, Class QC DRILLED SHAFTS – Materials: Replaced Concrete, Class S, with Concrete, Class QC APPROACH SLABS – Materials: Replaced Concrete, Class S, HP 3 or HP 4 with Concrete, Class QC CELLULAR RETAINING WALLS – Materials (A): Replaced Concrete, Class C with Concrete, Class QC 1.

2013 C&MS Section 500- Structures **NEW** ITEMS ITEM UNIT DESCRIPTION 511 cu.yd. (cu.m.) Class ____ Concrete with QC/QA 511 cu.yd. (cu.m.) Class QC 1 Concrete, Substructure 511 cu.yd. (cu.m.) Class QC 1 Concrete, Substructure with QC/QA 511 cu.yd. (cu.m.) Class QC 2 Concrete, Bridge Deck sq.y.(sq.m.) 511 cu.yd. (cu.m.) Class QC 2 Concrete, Bridge Deck sq.y. (sq.m.) with QC/QA 511 cu.yd. (cu.m.) Class QC 2 Concrete, Bridge Deck (Parapet) 511 cu.yd.(cu.m.) Class QC 2 Concrete, Bridge Deck (Parapet) with QC/QA 511 cu.yd. (cu.m.) Class QC 3 Concrete ____ w/ QC/QA 511 cu.yd. (cu.m.) Class QC 4 Mass Concrete, Substructure with QC/QA

2013 C&MS Section 500- Structures – Concrete At least 10 days before placing concrete, submit, the Department accepted Job Mix Formula (JMF) to the Engineer. The Engineer will review the mix design.

2013 C&MS Section 500- Structures Quality Control Requirements When the concrete bid item requires QC/QA, develop and submit a Quality Control plan (QCP) for the work and perform quality control testing of the concrete conforming to Item 455. The Engineer will perform Quality Assurance conforming to 455.

2013 C&MS Section 500- Structures Mass Concrete Requirements For concrete components with a minimum dimension of 5-ft or greater, or for drilled shafts with a dimension of 7-ft diameter or greater, develop a concrete mix design QC-4 for mass concrete according to

2013 C&MS Section 500- Structures Mass Concrete Requirements Submit a Thermal Control Plan (TCP) along with the approved JMF (s) to the Engineer for acceptance with highest maximum internal concrete temperature ≤ 160⁰ F (71⁰ C) maximum differential concrete temperature ≤ 36⁰ F (20⁰ C) (not applicable for drilled shafts), over 28 days from time of placement.

2013 C&MS Section 500- Structures Mass Concrete Requirements As an alternative, the Contractor may propose maximum differential temperature limits based on strength gain with time. TCP for alternative proposal shall include the methods for determining the temperature and supporting data, calculations and design.

2013 C&MS Section 500- Structures Mass Concrete Requirements Any in-place mass concrete that exceeded the temperature limits or cracked, is considered defective. Submit a proposed repair plan to the Engineer. The Department will determine if the proposed repair methods are acceptable or if removal is required.

2013 C&MS Section 500- Structures Placing Concrete Conform to the following tolerances from plan dimensions: 2012 C&MS Section Deviation from plumb for exposed surfaces ± ¾ inch (19 mm) Vertical alignment (Deviation from a line parallel to the grade line) ± ½ inch in 20 feet (13 mm in 6 m) Longitudinal alignment (Deviation from a line parallel to the centerline or baseline) ±½ inch in 20 feet (13 mm in 6 m) Width dimensions of walls for exposed surfaces ±½ inch (13 mm) Bridge Slab thickness±¼ inch (6 mm) Elevations of beam seats ±1/8 inch (3 mm) Slope, Vertical Deviation from Plane ±0.2% Slope, Horizontal Deviation from Plane ±0.4%

2013 C&MS Section 500- Structures Curing and Loading Remove falsework and open structures to traffic when concrete has reached strength specified in Table A for concrete bid items requiring QC/QA. Use Table B for concrete items not requiring QC/QA. Do not shorten minimum required Method A curing time regardless of strength test results.

2013 C&MS Section 500- Structures Curing and Loading

2013 C&MS Section 500- Structures Curing and Loading

2013 C&MS Section 500- Structures Bridge Deck Grooving Saw longitudinal grooves, in a continuous pattern, parallel to the centerline, after water curing the concrete and either before or some period after applying curing compound and before opening the bridge to traffic. Reapply the curing compound after removing standing water, within 12 hours after sawing grooves in the deck, if the grooves were sawed after applying the curing compound and the concrete deck is less than 30 days old.

2013 C&MS Section 500- Structures Bridge Deck Grooving Do not saw 9 to 12 inches from any devices in a bridge deck, such as scuppers or expansion joints. Do not saw a minimum of 2 inches to a maximum of 24 inches from skewed expansion joints. Maintain a clearance of 2 inches to 4 inches from the grooves to longitudinal joints in the deck.

2013 C&MS Section 500- Structures Bridge Deck Grooving Maintain a clearance of a minimum of 9 inches to a maximum of 30 inches from the grooves to the curbs or parapets. No un-grooved portions of deck beyond edge line and into the temporary or permanent travelled lanes. Saw grooves in a uniform pattern spaced at 3/4 inch, approximately 0.15 inches deep and 0.10 inches wide.

2013 C&MS Section 500- Structures 512 ITEM TREATING CONCRETE Basis of Payment: The Department will consider the removal of dust, dirt, oil, wax, curing compounds, efflorescence, laitance, and other foreign materials as incidental to the surface preparation of the concrete surfaces to be sealed. When the surface to be sealed contains an existing coating, the Department will consider all materials, equipment, and labor to remove the existing coatings, as incidental to the removal of existing coatings. 2. ** NEW ** Item Removal of Existing Coatings from Concrete Surfaces. This item was previously in Proposal Note 552. (2010). Remove existing coatings completely Designers need to calculate the area of existing coating to be removed. 24

2013 C&MS Section 500- Structures 518 DRAINAGE OF STRUCTURES Porous Backfill: Revised section so that backfill shall be placed at least 2 feet thick, instead of 18 inches thick, behind the full length of abutments, wingwalls, and retaining walls. Also, it is now required that porous backfill be placed for the full width of the trench and extend to the bottom of the approach slab or base, as shown in the plans. It is now required to place 2 Cu. Ft. of bagged No. 3 aggregate at each weep hole to retain the Porous Backfill. 25

2013 C&MS Section 500- Structures PSID-1-12 Prestressed Concrete I-Beam Bridge Details “Indiana Hybrid” I-beam. The sections are available in heights beginning at 36-inches and increasing in 6-inch increments up to 72-inches.