711.01 728 SECTION 711 – CONCRETE MEDIAN BARRIER
711.01 Description ................................ ................................ ................... 728
711.02 Materials ................................ ................................ ...................... 728
711.03 Equipment ................................ ................................ .................... 729
711.04 Genera l ................................ ................................ ......................... 729
711.05 Finishing ................................ ................................ ...................... 729
711.06 Curing ................................ ................................ .......................... 730
711.07 Method of Measurement ................................ .............................. 730
711.08 Basis of Payment ................................ ................................ .......... 730
DESCRIPTION
711.01 Description
This work consists of constructing cement concrete median barriers on a prepared subgrade. MATERIALS
711.02 Materials
Provide materials as specified in: Portland Cement ................................ ................................ .... 901.01 Fine Aggr egate for Concrete ................................ .................. 903.01 Coarse Aggregate for Class A Concrete: Size No. 467, 57 or 67 ................................ .................... 903.03 Joint Filler, Preformed Type ................................ .................. 905.01 Steel Bar Reinforcement ................................ ........................ 907.01 Welded Steel Wire Fabric ................................ ...................... 907.03 Cement Concrete Curing Materials ................................ ........ 913.05 Water ................................ ................................ ...................... 921.01 Air-Entraining Admixtures ................................ .................... 921.06 For Portland ce ment concrete median barriers, use Class A concrete, meeting 604. 711.03 729 EQUIPMENT
711.03 Equipment
Provide the applicable equipment specified in 604.04. CONSTRUCTION REQUIREMENTS
711.04 General
Construct concrete median barriers as shown on the Plans by fixed -form, slip - form, or precast methods. Perform all necessary excavation and backfilling for the barriers, and satisfactorily dispose of all excess excavated material. Thoroughly co mpact the material adjacent to the median barrier base as directed by the Engineer. Place slip -formed concrete with an approved slip -form placing machine designed to vibrate, consolidate, and finish the concrete in one pass of the machine so that a minimum of hand finishing will be necessary to provide a dense, homogeneous unit. Hold the sliding forms rigidly together to prevent spreading of forms and ensure after passing there is no noticeable slumping of concrete. Hold the concrete at a uniform consiste ncy. Where the median is concrete, form transverse contraction joints in the base and barrier to match the adjacent concrete median. Where the median is asphalt, construct transverse contraction joints in the base and barrier at a uniform spacing of 15 to 20 -foot intervals. Construct joints in the barrier directly over the joints in the base. Construct transverse contraction joints as shown on the Plans. Where concrete median barrier is installed on concrete pavement , the joints in the barrier and pavement shall coincide. Construct expansion joints in accordance with Plan details. Form expansion joints about all bridge piers, drainage inlets, concrete gutters, and other features projecting through, into, or against t he barrier curb and base. Chamfer joints as specified in 604.
711.05 Finishing
Concrete median barriers shall present a smooth, uniform appearance in their final position, conforming to the horizontal and vertical lines shown on the Plans or as directed by the Engineer. Ensure the top surface and the top 711.06 730 6 inches of the barrier, when checked with a 12 -foot straight -edge, do not vary more than 1/8 inch from the testing edge of the str aight-edge when placed parallel to the centerline. Correct deviations in excess of this requirement. Do not begin corrective work on extruded median barriers until the barrier surfaces have set sufficiently to withstand further damage that could be caused by making corrections. Give the exposed surface of the median barrier a Class II finish or applied texture finish as specified in 604.21. However, should the median barrier abut a similar barrier on a bridge, give the roadway barrier the same finish as that required on the bridge median barrier.
711.06 Curing
Perform curing as specified in 604.23. COMPENSATION
711.07 Method of Measurement
The Department will determine quantities of concrete median barrier, of the type specified, by measuring the length in linear feet, parallel to the centerline of the barrier, and including the joints but excluding all other openings in the barrier.
711.08 Basis of Payment
The Department will pay for accepted q uantities, complete in place, at the contract prices as follows: Item Pay Unit Concrete Median Barrier (Description) Linear Feet Unless otherwise provided, such payment is full compensation for all required excavation, backfill, disposal of excess excavated material, reinforcement, joint materials, drilling and grouting, and all other incidentals necessary for the complete construction of concrete median barriers. 712.01 731 SECTION 712 – TEMPORARY TRAFFIC CONTROL
712.01 Description ................................ ................................ ................... 731
712.02 Materials ................................ ................................ ...................... 731
712.03 Reserved ................................ ................................ ....................... 734
712.04 General ................................ ................................ ......................... 734
712.05 Pavement Marking Removal ................................ ........................ 742
712.06 Temporary Centerline and Lane Marking ................................ .... 743
712.07 Maintenance ................................ ................................ ................. 743
712.08 Adjustment to Plans ................................ ................................ ..... 744
712.09 Method of Measurement ................................ .............................. 744
712.10 Basis of Payment ................................ ................................ .......... 746
DESCRIPTION
712.01 Description
This work consists of furnishing, erecting, and maintaining all construction warning signs, b arricades, flexible drum channelizing units, temporary pavement markings, and other traffic control devices in accordance with the provisions of the current edition of the MUTCD, including all addenda, or as shown on the Plans or as directed by the Enginee r for the purpose of safely directing traffic through construction zones. This work shall include installing additional devices as necessary in construction work zones. MATERIALS
712.02 Materials
Provide traffic control and marking devices in accordance with the current edition of the MUTCD, except as herein modified. Provide materials as specified in: Signs: Aluminum ................................ ................................ 916.02 Reflective Sheeting ................................ .................. 916.06 Paint ................................ ................................ ......... 916.09