843.01 DESCRIPTION. This section covers requirements for geotextile fabrics for slope
protection and channel lining, underdrains, subgrade or embankment foundation stabilization, and drainage blankets.
843.02 GEOTEXTILE FABRIC. Geotextiles shall meet the physical and chemical
requirements of AASHTO M 288 (2015) for the specific applications, except as modified in the subsequent sections. Ensure that the fabric, except wrapping placed directly against perforated pipe, is formed in widths of at least 6 feet. When necessary, sew sheets of fabric together to form required fabrics widths. Sew the sheets of fabric together at the point of manufacture or other approved locations. The geotextile manufacturer or supplier (private label) is responsible for establishing and maintaining a quality control program to ensure compliance with this section. The manufacturer or supplier must pa rticipate in the National Transportation Product Evaluation Program (NTPEP) for Geotextile and Geosynthetics. Current data must be posted in NTPEP DataMine.
843.03 ACCEPTANCE. Select geotextiles from the Department’s List of Approved
Materials. Obtain the Department’s approval for all material before incorporating it into the project.
843.04 PACKAGING. During all periods of shipment and storage, wrap the fabric in a
heavy duty protective covering to protect the fabric from direct sunlight, ultraviolet rays, mud, dirt, dust, and debris. Additionally, stor e the fabric so that temperatures are below 140 ˚F.
843.05 GEOTEXTILE FABRIC FOR SLOPE PROTECTION, CHANNEL LINING, AND STABILIZATION. Fabric used for slope protection, channel lining and stabilization
shall meet AASHTO M 288 Class 1 strength requirements and conform to AASHTO M 288 section on permanent erosion control, with the exception of the minimum permittivity value being 1.0 sec -1.
843.06 GEOTEXTILE FABRIC FOR SUBSURFACE DRAINAGE AND SEPARATION. Fabric used for subsurface drainage and separation shall conform to
AASHTO M 288 Class 1 or 2 strength requirements and conform to AASHTO M 288 section on subsurface drainage requirement s, with the exception of the minimum permittivity value being 1.0 sec -1.
843.07 Acceptance Procedure for Non-Specification Fabric.
Ensure that all geotextile fabric conforms to the requirements of this section and the proposed application. However, when non-specification geotextile fabric is inadvertently incorporated into the work before completion of testing, the Department may accept the material with reduction in pay, provided the failure is marginal and will not cause poor performance. The Department will apply the largest payment reduction when the material fails to meet more than one specification requirement. The Department will calculate the payment reduction on the invoice cost of the material delivered at the project site. The Department will reject any fabric that fails and has not been incorporated into the work. GRAB STRENGTH PAYMENT REDUCTION % of Requirement 100% or more 90%-99% 75%-89% 74% or Less Reduction Rate 0% 25% 40% * 843-1 TEAR STRENGTH PAYMENT REDUCTION % of Requirement 100% or more 90%-99% 75%-89% 74% or Less Reduction Rate 0% 25% 40% * PUNCTURE STRENGTH PAYMENT REDUCTION % of Requirement 100% or more 90%-99% 75%-89% 74% or Less Reduction Rate 0% 25% 40% * SEWN SEAM STRENGTH PAYMENT REDUCTION % of Requirement 100% or more 90%-99% 75%-89% 74% or Less Reduction Rate 0% 25% 40% * * Remove and replace the fabric unless the Engineer determines the fabric can remain in place at a 100% reduction rate
843.08 FASTENER PINS. The Engineer will accept fastener pins based on visual
inspection on the project. Conform to the following:
A.Underdrain Systems. Use pins that are formed of No. 9 diameter or heavier steel wire and are at least on foot long with a 4-inch right angle bend on one end.
B.Slope Protection, Channel Lining, Subgrade and Embankment Foundation Stabilization, and Wrapped Aggregate Drainage Blankets. Provide fastener pins that are formed of 3/16 inch diameter or heavier steel, pointed at on end, with a head on the opposite end to retain a washer with a minimum diameter of 1 1/2 inches. 843-2 SECTION 844 MINERAL ADMIXTURES FOR CONCRETE
844.01 FLY ASH REQUIREMENTS. For fly ash added to concrete mixtures as a
separate ingredient, conform to ASTM C 618, Class F or Class C, except ensure that the loss on ignition does not exceed 3.0 percent or 6.0 percent for fly ash receiving an approved chemical treatment. Concrete containing Class C fly ash may reduce sulfate resistance. Susceptibility to sulfate attack relates to the resistance factor, R. The value of R is defined as the ratio, (CaO -5.0)/(Fe 2O3), as determined from the fly ash oxide analysis. A resistance factor (R) greater than 3.0 indicates a reduction in sulfate resistance. Do not use Class C fly ash having an R ratio greater than 3.0 in concrete where su lfate attack is possible unless the maximum expansion limits for moderate sulfate exposure found in the Supplemental Requirements of ASTM C618 are met.
844.02 Approval.
844.02.01 Fly Ash. Select from the Department’s List of Approved Materials for fly
ash sources. To be placed on the list, furnish samples and ASTM C 618 test data developed over the previous 3 months, and conform to the requirements in KM 64-325.
844.02.02 Slag Cement. The Department’s Division of Materials maintains a list of
approved Slag Cement sources by producer. Furnish samples and ASTM C 989 test data for the previous six months and meet the following requirements to obtain approval.
1.Submit the slag cement supplier’s quality control program to the Engineer for approval. The slag cement delivered to the project shall have uniform properties complying with this specification. Laboratories performing tests on slag cement for conformance to ASTM C 989 shall participate in the laboratory evaluation program conducted by the Cement and Concrete Reference Laboratory of ASTM.
2.Submit certification with each shipment of slag cement to document its compliance with this specification and ASTM C 989.
3.Submit actual ASTM C 989 test results for fineness, air content, slag activity index, sulfide sulfur content, and sulfate ion content with each shipment. The Department reserves the right to perform all sampling and testing on slag cement that it deems necessary or desirable.
844.02.03 Silica Fume. The Department’s Division of Materials maintains a list of
approved silica fume admixtures by brand name and manufacturer. Furnish samples and ASTM C1240 test data for the previous six months and meet the following requirements to obtain approval:
1.Submit the silica fume supplier’s quality control program to the Engineer for approval. The silica fume delivered to the project shall have uniform properties complying with this specification. Laboratories performing tests on silica fume for conformance to ASTM C1240 shall participate in the laboratory evaluation program conducted by the Cement and Concrete Reference Laboratory of ASTM.
2.Submit certification with each shipment of silica fume to document its compliance with this specification and ASTM C1240.
3.Submit actual ASTM C1240 tests results for the chemical and physical requirements with each shipment.
844.03 NON-SPECIFICATION FLY ASH. When either Class C or Class F sampled
fly ash fails to meet specification requirements for loss on ignition (LOI), but the Engineer determines that concrete produced using the fly ash meets requirements for entrained air 844-1
Source: Kentucky Standard Specifications for Road and Bridge Construction, 2019 Edition. Pages 675–676 of 718.