526RUBBLIZING OF CONCRETE PAVEMENTS

526.1DESCRIPTION —This work is rubblizing and seating of existing concrete pavements before the

placement of a pavement overlay. Rubblizing is classified into two types as follows:

with at least 50% of the pieces per square yard having a maximum horizontal dimension of 4 inches.

526.2MATERIAL—

526.3CONSTRUCTION—

approval before the start of construction. If, during rubblizing operations results are not being obtained, cease all rubblizing operations and submit an alternate plan and list of equi pment capable of obtaining the specified results to the Representative. Resume rubblizing operations upon acceptance of the alternate plan.

concrete pavement, as specified in Section 490.3, before beginning rubblizing operations. Do not remove any existing full depth asphalt patches.

the specified dimensions, throughout the full depth of the pavement, on a regular and continuous basis. Provide equipment suitable to the Representative. For Type 2 rubblizing, ensure that pieces are free of bond with reinforcement to allow adequate seating. Excavate two, 3 -foot by 12 -foot, full-depth sections of rubblized pavement, within the first 1/2 mile of rubblizing operations, to ensure that the pavement is being rubblized to the specific dimensions. Excavate additional areas, as directed, to ensure that the specified dimensions are being maintained. Repeat the initial two -section, full -depth pavem ent removal testing procedure whenever the equipment, rubblizing pattern, or breaking force is changed. Use subbase, No. 2A to backfill all excavated areas. Place backfill in maximum 6 -inch lifts and compact by rolling until nonmovement is achieved. Do not allow any shoving or wave motion under the roller. Cut off and remove any reinforcement steel exposed at the surface of the rubblized pavement. If the transverse joints of the original pavement contained steel plates, remove any steel plates that are exposed. Exercise care during rubblizing operations to prevent shattering pavement edges adjacent to asphalt base repairs. Exercise extreme care during rubblizing operations to protect and prevent damage to underground utilities, drainage facilities, bridge approach slabs, and bridge decks. Repair any damage that occurs to these areas, at no cost to the Department.

Section 108.05(c)3.e, to seat the rubblized pavement. Establish a rolling pattern that ensures all areas of rubblized pavement surface are directly contacted by the r oller in no more than four passes. Do not use vibratory rollers. Final seating of the rubblized pavement is satisfactory when vertical deflection under the roller is less than 3/4 inch. Undercut areas where this condition is not achieved. Remove all unsuitable or unstable material. Compact backfill as specified in Section 526.3(c).

Fifty-ton rollers may only cross bridges as approved by the Bridge Engineer. Repair any damage that occurs to bridge approach slabs and bridge decks during the seating operation, at no cost to the Department.

to remove all loose material. Prohibit traffic on the roadway after the pavement has been rubblized and seated. Repair all rubblized and seated pavement areas disturbed by construction traffic, at no cost to the Department. Complete all operations before construction of the leveling course. If a n asphalt leveling course is indicated, apply a prime coat to the rubblized and seated surface, as specified in Section 461, before placing the leveling course. Complete placement of the overlay within 60 calendar days after rubblizing and seating. Do not leave the rubblized and seated pavement exposed to freezing conditions.

526.4MEASUREMENT AND PAYMENT—