Performance Specifications for Rapid Highway Renewal (2014) / Chapter Skim
Currently Skimming:
Pages 117-142
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 117... ...
117 A p p e n d i x F introduction Current department of transportation (DOT) specifications for hydraulic cement concrete bridge decks are generally of the prescriptive type.
|
From page 118... ...
118 and 2, the placement was made using the full extension of the chutes of the trucks. However, the chutes could not reach the whole width, and the deposited concrete had to be spread to the far side.
|
From page 119... ...
119 sprayed on the concrete that was not yet finished, as shown in Figure F.2. In addition to the use of come-along tools, vibrators also were used to spread the concrete.
|
From page 120... ...
120 • Do not spray water in front of or behind the screed. Water increases the water-cementitious materials ratio and causes a weak layer at the surface.
|
From page 121... ...
121 Table F.3. Dates and Fresh Concrete Properties for EBL Batch Date Slump (in.)
|
From page 122... ...
122 Figure F.5. Pump truck.
|
From page 123... ...
123 The rejectable quality level (RQL) is that quality of concrete requiring removal and replacement by the contractor or for which the contractor will provide remedial action.
|
From page 124... ...
124 lower specification limit, is 2.4375 in., for No. 5 bars with 5⁄8-in.
|
From page 125... ...
125 compressive strength analysis. The upper specification limit for 28-day permeability is 2200 coulombs.
|
From page 126... ...
126 areas are shown as dips in attachment tables F.B.1, F.B.2, and F.C.1. Dips were measured at three locations -- at each of the joints, middle, and quarter points -- and recorded if they were ¼ in.
|
From page 127... ...
127 Table F.18. Pay Factors for Cover Depth Using VDOT ERS Approach (%)
|
From page 128... ...
128 Table F.22. Pay Factors for Permeability Using VDOT ERS Approach (%)
|
From page 129... ...
129 All of the pumping-dependent parameters fully met the requirements before pumping. As previously mentioned, the rewards are higher and the penalties steeper with the SHRP 2 approach.
|
From page 130... ...
130 Attachment A: performance parameters Table F.A.1. Performance Parameters Parameter Measurement Procedure Target/Lot Requirements Tolerance/Quality Acceptance Limits Cracking Cracks measured at 3-ft intervals on the surface of the deck in the 3 hours after sunrise at a concrete age ≥ 28 days.
|
From page 131... ...
131 Attachment B: WBL Table F.B.1. Cover Depth Data Parapet Dipsa (in.)
|
From page 132... ...
132 0.375 2.35 2.95 2.45 0.250 M 0.625 2.90 3.00 2.75 Q 1 Joint 0 Pier 6 2.65 3.20 2.85 Joint 3.00 3.00 2.85 Q 2 3.00 3.10 2.90 M 2.95 3.00 2.75 Q 1 2.00 3.35 2.75 0.250 Pier 5 2.35 2.75 2.35 Pier 0.375 2.70 2.95 2.90 Q 2 0.500 2.75 2.50 2.65 M 0.625 2.65 2.40 2.70 Q 1 Joint 0 Pier 4 0.375 2.60 2.60 2.75 Joint 0.750 2.70 2.20 2.45 0.250 Q 2 2.80 2.55 2.50 M 0.250 2.60 2.70 2.05 Q 1 2.65 3.25 2.85 Pier 3 0.250 2.75 2.85 2.50 Pier 2.60 2.80 2.40 Q 2 2.85 2.65 2.40 M 2.55 2.90 2.30 Q 1 Joint 0 Pier 2 2.70 2.75 2.15 Joint 2.20 2.75 2.15 Q 2 0.250 2.80 2.85 2.30 M 2.95 2.75 2.35 Q 1 2.55 2.75 2.40 Pier 1 2.70 3.15 2.75 Pier 2.55 2.95 2.95 Q 2 2.90 2.85 2.65 0.500 M 2.65 2.70 2.70 Q 1 3.05 2.65 2.35 Joint 0 Abut. A a Dips are low spots on deck with a depth of ¼ in.
|
From page 133... ...
133 Table F.B.2. Average, Standard Deviation, and the Number of Dips Span Average Standard Deviation No.
|
From page 134... ...
134 Table F.B.4. Analysis of Compressive Strength and Permeability Before Pumping After Pumping Before Pumping After Pumping Data Average Standard Deviation Batch Strength Perm.
|
From page 135... ...
135 Attachment C: eBL Table F.C.1. Cover Depth Data Parapet Dipsa (in.)
|
From page 136... ...
136 0.3750 2.50 3.45 3.00 0.3750 Pier Pier 6 0.3750 2.50 3.45 3.00 0.3750 Pier 0.5000 2.50 3.00 2.80 0.5000 Q 2 2.80 2.60 2.60 M 0.3750 2.80 2.90 2.55 Q 1 2.90 3.25 2.70 0.1250 Joint 0 5 0.5000 2.50 3.10 2.50 0.2500 Joint 0.2500 2.20 2.65 2.45 0.2500 Q 2 0.3125 2.25 2.35 2.50 0.3125 M 0.1875 2.15 2.60 2.60 0.2500 Q 1 0.3125 1.80 2.55 1.95 0.1875 Pier Pier 4 0.3125 1.80 2.55 1.95 0.1875 Pier 0.3125 2.50 2.70 2.75 0.2500 Q 2 0.2500 2.65 2.40 2.50 0.5000 M 0.2500 2.80 2.80 2.65 0.1875 Q 1 0.1250 3.00 3.40 2.80 0.2500 Joint 0 3 2.50 2.75 2.75 0.2500 Joint 0.1250 2.50 2.90 2.45 0.1250 Q 2 0.1875 2.25 2.55 2.55 0.3125 M 0.2500 2.10 2.60 2.45 0.3750 Q 1 0.1250 2.35 2.80 2.25 0.2500 Pier Pier 2 0.1250 2.35 2.80 2.25 0.2500 Pier 0.1250 2.25 2.55 2.35 0.0625 Q 2 0.1250 2.00 2.65 2.40 0.3125 M 0.2500 2.10 2.80 2.00 0.1875 Q 1 0.5000 2.70 3.10 2.50 0.1875 Joint 0 1 0.1250 2.65 3.60 2.85 0.1250 Joint 0.3125 2.60 3.10 2.90 0.1250 Q 2 0.3125 2.65 2.85 2.75 0.1875 M 0.3125 3.05 3.00 2.85 0.1250 Q 1 0.1250 3.50 3.20 2.65 Joint 0 Abut. A a Dips are low spots on deck with a depth of ¼ in.
|
From page 137... ...
137 Table F.C.2. Analysis of Compressive Strength and Permeability Before Pumping After Pumping Before Pumping After Pumping Data Average Standard Deviation Span Strength Perm.
|
From page 138... ...
138 Attachment d: inspection Checklist Hydraulic Cement Concrete deck Part 1: Preplacement Inspection Issue Yes No N/A Comments Initials A Forms i.
|
From page 139... ...
139 iv. Is the aggregate moisture content checked daily at least once by the gravimetric method?
|
From page 140... ...
140 iv. Is the concrete free from segregation?
|
From page 141... ...
141 ii. Is any hand finishing moderate?
|
From page 142... ...
142 B Checking of Joints: Is each joint checked for alignment, removal of temporary formwork, and workmanship?
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.