(A) Composition.
(1) The flowable fill shall have a compressive strength from 50 PSI (pounds per square inch) to 150 PSI.
(2) The flowable fill shall have a flow test spread diameter greater than eight inches.
(3) The test for flow shall consist of filling a three-inch diameter by six-inch high open-ended cylinder placed on a smooth, level, nonporous surface to the top with the flowable fill. The cylinder shall be pulled straight up within five seconds. The spread of the fill shall be measured. The minimum spread shall be eight inches. This test shall be performed by the Street Commissioner of the City or his or her designated representative.
(4) The flowable fill mix may consist of the following materials and be proportioned within the following limits for each material per cubic yard:
(a) Portland concrete: 25 to 75 pounds per cubic yard;
(b) Fly ash: zero to 1,500 pounds per cubic yard;
(c) Fine aggregate: 2,010 to 3,150 pounds per cubic yard; and
(d) Water: as required, approximately 500 pounds per cubic yard.
(5) The producer may use water reducing admixtures and also air-entraining admixtures when used in accordance with the admixture’s manufacturer’s recommendations. The flowable fill may have an air content ranging from 0-25% by volume.
(6) The proposed mix design shall be submitted and approved by the City Street Commissioner. A trial batch demonstration and compressive strength report may be required.
(B) Placement.
(1) Before any flowable fill is placed, any pipes, structures, or other objects that might be displaced by the placement of the flowable fill shall be adequately anchored, braced, or otherwise secured.
(2) No flowable fill or any other fill shall be placed in the excavation until the excavation and any required bracing has been inspected by the Street Commissioner of the city or his or her designated representative.
(3) The mixture shall be delivered and discharged using ready-mix trucks approved for use by the State Department of Transportation.
(4) A copy of the batch ticket for the delivered flowable fill shall be required to be turned into the Zoning Officer of the city upon completion of the street cut.
(5) Flowable fill shall not be placed on frozen ground.
(6) Flowable fill shall be protected from freezing until the material has stiffened and bleeding water subsided. When the temperature at placement is below freezing (32°F), the Street Commissioner of the city may require that freezing protection extend for as long as 48 hours.
(7) When the flowable fill is being placed in industrial streets, commercial streets, federal aid highways, or other streets used for nonresidential uses, the flowable fill shall extend to a minimum of six inches below the finished surface of the adjacent pavement. If the final six inches of the pavement is being finished with concrete, the concrete may be placed as soon as bleeding water has subsided from the flowable fill. The concrete shall be protected from traffic for a minimum of 48 hours, unless otherwise approved by the Street Commissioner of the city or his or her designated representative. When hot asphalt is used for restoring the final six inches, the flowable fill shall be allowed to cure for a minimum of 24 hours, unless otherwise approved by the Street Commissioner of the city or his or her designated representative. The hot asphalt shall consist of five inches of HAC #5 base and one inch of HAC #11 surface meeting current INDOT specifications. When the existing pavement depth is greater than six inches, the Street Commissioner of the city may require that the final restoration match the existing pavement depth.
(8) When flowable fill is being placed in residential streets or alleys, the flowable fill shall extend to a minimum of four and one-half inches below the finished surface of the adjacent pavement. Placing of concrete is the same as for industrial streets above but the depth may be four and one-half inches. After the flowable fill has cured for 24 hours, unless otherwise approved by the Street Commissioner of the city, hot asphalt may be placed and shall consist of three and one-half inches of HAC #5 base and one inch of HAC #11 surface meeting current INDOT specifications. When the existing pavement depth is greater than four and one-half inches, the Street Commissioner of the city may require that the final restoration match the existing pavement.
(9) When flowable fill is being placed in unpaved streets or alleys, the flowable fill shall extend to a minimum of six inches below the adjacent surface grade. After the flowable fill has cured for 24 hours, unless otherwise approved by the Street Commissioner of the City, six inches of compacted aggregate #73 limestone, meeting current INDOT specifications, shall be placed and compacted.
(Ord. 2001-12, passed 2-5-2002) Penalty, see § 153.99