J.4. - ROADWAY TESTING AND INSPECTION

J.4.1.   Roadway Subgrade Testing and Inspection

A.

Field Moisture Density Tests. Field moisture-density tests using acceptance methods will be required at random locations at the rate of one for each 500 lineal feel, or portion thereof, of paving for each travel lane.

B.

Final Proof Rolling Inspection Notification. The ECM Administrator shall be notified at least 24 hours before final proof-rolling.

C.

Review and Approval of Tests. The results of field density tests and proof-rolling shall be submitted to and reviewed by the ECM Administrator. If testing indicates unsatisfactory work, the necessary reworking, compaction, or replacement will be required prior to continuation of the paving process. If all tests are acceptable, compaction will be approved for the placement of the paving course. The approval is valid for 24 hours. Changes in weather, such as freezing or precipitation, will require reapproval of the subgrade.

J.4.2.   Lime Treated Subgrade Testing and Inspection

A.

Field Moisture Density Tests. Lime treated subgrade shall be observed and tested on a full-time basis. Field moisture-density tests shall be taken at the rate of one for each 500 lineal feet of travel lane for each lift. Field density shall be compared to the compaction curves (AASHTO T 220) each soil type for percentage compaction determinations. Field compacted 7-day strength and lime content (AASHTO T 232) determinations shall be required for each 500 tons of subgrade treated, with a minimum of one per project.

B.

Review and Approval of Tests. The results of field density, lime content, and strength tests shall be submitted and reviewed by the ECM Administrator. Should these tests fail to meet project specifications, the strength reduction will be used to calculate increased pavement layer or overlay thickness required for the design section. If all tests are acceptable, compaction will be approved for the placement of the paving course.

J.4.3.   Aggregate Base Course Testing and Inspection

A.

Verification of Materials Properties. The contractor or permit holder shall, upon request by the ECM Administrator, provide verification of material properties.

B.

Gradation and Atterberg Limits Materials Sample Tests. At least one sample of aggregate base course for each 1,000 tons of materials placed shall be tested to determine gradation and Atterberg Limits. Should these tests indicate the material does not meet specifications, the material shall be removed and replaced.

C.

Field Moisture Density Tests. During placement and compaction, compaction curves will be required for each material used. Field moisture-density tests shall be taken of each lift of material at random locations at approximate intervals of 500 feet in each travel lane. At least 20 percent of the tests shall be taken within 12 inches of manholes, valves, and curbs.

D.

Review and Approval of Tests. The results of field density tests shall be submitted to and reviewed by the ECM Administrator. Should testing indicate unsatisfactory work, the necessary reworking, compaction, or replacement will be required prior to continuation of the paving process. If all tests are acceptable, compaction will be approved for the placement of the paving course.

J.4.4.   Cement Treated Aggregate Base Course Testing and Inspection

A.

Verification of Materials Properties. The contractor or permit holder shall provide verification of material properties of the approved mix design.

B.

Approval of Subgrade. Materials shall be placed on a subgrade that has been proof-rolled within the past 24 hours and found to be stable and non-yielding and has been approved by the ECM Administrator. Should weather conditions change, such as freezing, precipitation, etc., materials shall not be placed until the subgrade is re-approved by the ECM Administrator.

C.

Unconfined Compressive Strength, Gradation, and Atterberg Limits Material Test. At least one sample of cement treated aggregate base course for each 1,000 tons of material placed shall be tested to determine gradation, and Atterberg Limits. Six field prepared proctor mold samples shall be taken for each 500 tons placed and tested at 7 and 28 days to determined unconfined compressive strength.

D.

Field Moisture Density Tests. During placement and compaction, compaction curves will be required for each material used in accordance with AASHTO T 134. Field moisture-density test shall be taken of each lift of material at random locations at approximate intervals of 500 feet in each travel lane. At least 20 percent of the tests shall be taken within 12 inches of manholes, valves, and curbs.

E.

Review and Approval of Tests. The results of laboratory tests and field density tests shall be submitted to and reviewed by the ECM Administrator. Should testing indicate unsatisfactory work, necessary adjustments will be made to the pavement section to comply with original design strength requirements. If all tests are acceptable, compaction will be approved for the placement of the paving course.

J.4.5.   Hot Mix Asphalt (HMA) Testing and Inspection

Hot Mix Asphalt (HMA) materials shall be tested according to the latest edition of the Pikes Peak Region Asphalt Specification. The Pikes Peak Region Asphalt Specification can be obtained online at: http://adm.elpasoco.com/publicservices/transportation/Pages/default.aspx.

J.4.6.   Portland Cement Concrete Testing and Inspection

A.

Portland Cement Concrete Requirements. When the mean daily temperature is less than 40°F, in accordance with A.C.I. Specifications, or when concrete is placed with ambient temperatures below 40°F, it shall be the contractor or permit holder's responsibility to provide testing lab certified proof that the temperature of the concrete has been maintained at not less than 50°F for a minimum of five (5) days or until at least seventy percent (70%) of the design strength has been attained.

B.

Aggregate Samples. During placement of Portland cement concrete pavement, observation and testing shall be on a full-time basis. For each day of production or every 400 cubic yards placed (or portion thereof), aggregate samples shall be obtained for gradation of both the coarse and fine aggregates.

C.

Slump, Air Content, Unit Weight, and Mix Temperature Testing. Slump, air content, unit weight, and mix temperature shall be tested every 100 cubic yards of pavement placed. The first three loads shall be tested for slump and air content. If any one test fails to meet requirements, slump and air content tests shall continue until three consecutive loads meet requirements. Thereafter, slump and air shall be tested every fifth load.

D.

Compressive Strength Cylinder Testing. Six compressive strength cylinders shall be fabricated for each 100 cubic yards placed. Cylinders shall be tested as follows: 1 at 7 days, 2 at 28 days, and 1 for backup, as required by the ECM Administrator. Testing interval may be increased to approximately 1/3 of the daily volume at the discretion of the ECM Administrator.

E.

Certificates of Compliance and Pre-Testing. Portland cement and fly ash will be accepted on the basis of current certificates of compliance and pre-testing by CDOT. Reinforcing steel, dowels, and tie bars will be accepted by certificate of compliance and mill reports. Water, if not potable, shall be sampled and tested before use. Only CDOT-approved brands of air entraining agents, chemical admixtures, and curing materials may be used and must be documented.

F.

Surface Smoothness Tests. Surface smoothness shall be tested and corrected as necessary according to Section 412.17 CDOT. The profil-o-graph index shall not be more than 14 inches per mile with a deviation of not more than 0.5 inches in 25 feet. Concrete tested with a 10-foot straight edge shall have a deviation of no more than 3/16 inch in 10 feet. This requirement is for all concrete mainline pavements. Surface smoothness shall be tested and corrected as necessary according to CDOT Section 412.16.

G.

Concrete Thickness Tests. Concrete thickness shall be verified by coring after construction at random locations at intervals of approximately 500 feet in each travel lane as determined and marked by the ECM Administrator. The ECM Administrator must be present during actual core drilling or cores will not be accepted. Surface smoothness shall be tested and corrected as necessary according to CDOT Section 412.16.

H.

Profil-O-Graph Tests Submitted. Profil-o-graph tests shall be submitted to, and accepted by, the ECM Administrator prior to beginning the 2-year warranty period.

I.

Onsite Test Location. All on-site air tests shall be taken at the point of placement: at the end of the concrete chute, or, if a "pump truck" is used, at the end of the pump, etc.

J.

Review and Approval of Tests. All test results shall be submitted to, and reviewed by, the ECM Administrator. Should testing indicate unsatisfactory work, removal and replacement or grinding will be required. If all tests are acceptable, the pavement will be accepted and the 2-year warranty period will begin.

J.4.7.   Asphalt Tack Coat Testing and Inspection

Asphalt tack coat materials shall be tested according to the latest edition of the Pikes Peak Region Asphalt Specification. The Pikes Peak Region Asphalt Specification can be obtained online at: http://adm.elpasoco.com/publicservices/transportation/Pages/default.aspx .

J.4.8.   Cement Stabilized Subgrade Testing and Inspection

A.

Verification of Materials Properties. The contractor or permit holder shall provide verification of material properties of the approved mix design.

B.

Thickness of Stabilized Zone. Stabilized zone thickness shall be verified by the use of phenolphthalein and shall be performed at intervals of approximately 500 feet in each lane. When the measurement of the thickness is deficient by more than 1 inch from the plan thickness, two additional locations shall be measured randomly within the deficient area and used in determining the average thickness. When the average thickness is deficient by more than 1 inch, the entire area shall be reprocessed to meet the design parameters or the roadway design section must be re-evaluated.

C.

Unconfined Compressive Strength, Gradation, and Atterberg Limits Material Test. At least one sample of cement stabilized subgrade for each 1,000 tons of material stabilized shall be tested to determine gradation and Atterberg Limits. The stabilized subgrade must develop a laboratory compressive strength that meets the design compressive strength. Samples shall be molded from stabilized soil within 1.5 hours of final mixing with the material compacted per ASTM D 558 or ASTM D 698, as specified in subgrade stabilization design, at the field moisture content.

D.

Field Moisture Density Tests. During placement and compaction, compaction curves will be required for each material used in accordance with AASHTO T 134. Field moisture-density test shall be taken of each lift of material at random locations at approximate intervals of 500 feet in each travel lane. At least 20 percent of the tests shall be taken within 12 inches of manholes, valves, and curbs.

E.

Review and Approval of Tests. The results of laboratory tests and field density tests shall be submitted to and reviewed by the ECM Administrator. Should testing indicate unsatisfactory work, necessary adjustments will be made to the pavement section to comply with original design strength requirements. If all tests are acceptable, compaction will be approved for the placement of the paving course.