(A) General.
(1) The work performed under these standards shall consist of the construction of Portland cement concrete driveway aprons as described herein. The driveway apron, by definition, shall be that portion of the driveway located between the sidewalk and the street.
(2) Residential driveway aprons shall have a minimum width of ten feet for one-car driveways, 18 feet for two-car driveways, measured at the sidewalk, and a width three feet greater at the curb. All residential aprons shall have a minimum concrete thickness of six inches, and a granular base of five inches minimum compacted thickness. Commercial and industrial driveway aprons shall be constructed as directed by the Village Engineer.
(3) New driveway aprons abutting existing sidewalks or curbs shall be constructed to meet the grade of such sidewalks or curbs, or as may be directed by the Village Engineer. The locations of driveway aprons and grade for driveway aprons when no adjacent sidewalks or curb and gutter exists, shall be as directed by the Village Engineer. The maximum slope of the driveway apron shall be 8%, and the minimum slope shall be 2% unless otherwise permitted by the Village Engineer.
(B) Materials. All materials shall comply with the following standards of quality:
Materials Standards
(1) Portland cement ASTM C-150 Type I, Normal ASTM C- 150 Type III, High- Early-Strength
(2) Fine aggregate ASTM C-33, clean sand graded between #100 and #4 sieve limits
(3) Coarse aggregate ASTM C-33, uncoated crushed stone or washed gravel
(4) Water Potable and fit to drink
(5) Water-reducing admixture ASTM C-494 Type A (normal) or Type D (retarder)
(6) Air entraining agent ASTM C-260
(7) Premolded filler strips ASTM D-994
(8) Curing compound ASTM C-309, Type I
(9) Reinforcement ASTM A-615, Grade 40 or Grade 60.
(C) Concrete quality.
(1) Use ready-mix concrete, complying with ASTM C-94 and supplied by a ready-mix source which is inspected yearly by the State Division of Highways, unless otherwise permitted by the Village Engineer. Delivery tickets shall note the mix designation, time dispatched, date, project, and contractor, and shall be available for review by the Village Engineer or his representative.
(2) Concrete mix design shall be contractor's responsibility. Prior to concrete delivery, submit a report from a commercial testing laboratory on the proposed mix proportion to the Village Engineer for approval. Prior to concrete delivery, submit laboratory reports on seven and 28 day strengths of each proposed mix. No concrete will be allowed to be placed until the mix designs have been approved.
(3) Concrete mix shall be designed using the following data:
(a) Minimum compressive strength of 3500 psi at 28 days.
(b) Minimum of six sacks of cement per cubic yard.
(c) Maximum size aggregate of one inch.
(d) Air entrainment of 6% ± 1%.
(e) Maximum slump of four inches.
(f) Maximum water content including moisture in the aggregate of six gallons per sack of cement.
(g) All concrete shall contain a water- reducing admixture with no reduction in cement content permitted.
(D) Subgrade preparation. Where a fill condition exists, remove all topsoil and unsuitable material; tamp or roll subgrade until thoroughly compacted before placing granular base; and fill shall be placed in six- inch layers to the proper subgrade elevation. Side slopes of fill material shall not exceed one-foot vertical to three-feet horizontal. Where a cut condition exists, remove all topsoil and unsuitable material and remove subgrade to the proper elevation allowing sufficient width to accommodate the forms.
(E) Granular base. Place a granular base of five- inch minimum thickness on the prepared subgrade. The base shall extend the full width of the driveway apron. Aggregate gradation shall conform to gradation CA6 of the State Division of Highways standard specifications.
(F) Forms. Side forms shall be of lumber of not less than two inches nominal thickness or steel of equal rigidity. The use of two by four lumber forms is not permitted. Forms shall be held securely in place by stakes or braces with the top edge true to line and grade.
(G) Expansion joints. Expansion joints shall be placed at the junction of the driveway apron and the sidewalk and at the junction of the driveway apron and the curb. Such expansion joints shall be ½-inch thick pre-molded filler strips with the top of the strip placed ¼-inch below the surface of the driveway apron.
(H) Placing and finishing concrete.
(1) Notify the village when the subgrade has been finished, with a minimum of 24 hours notice prior to placing concrete. No concrete shall be placed until the subgrade has been inspected and approved by the village.
(2) Do not place concrete on ice or frozen subgrade.
(3) The subgrade shall be moistened just before the concrete is placed. The concrete shall be placed in successive batches for the entire width of the slab, struck off from ½- to ¾-inch higher than the finished slab, tamped until all voids are removed and free mortar appears on the surface, thoroughly spaded along the edges, struck off to the true grade, and finished to a true and even surface with floats and trowels. The final troweling shall be done with a steel trowel, leaving a smooth, even surface. After the water sheen has disappeared the surface shall be given a final finish by brushing with a fine-hair broom. The broom shall be drawn across the driveway apron at right angles to the edges of the apron with adjacent strokes slightly overlapping, producing a uniform, slightly roughened surface with parallel marks.
(4) Control joints shall be constructed so as to divide the driveway apron into sections which are approximately square, and having no side longer than 15 feet. The control joints shall be not less than 1/8-inch nor more than ¼-inch in width, and shall be edged with an edging tool having a ¼-inch radius. The minimum depth shall be 1-¼ inch.
(I) Cold-weather concreting. After the first seasonal frost protect concrete from freezing in accordance with "Recommended Practice for Cold- Weather Concreting" (ACI 306). The contractor shall be responsible for all concrete damaged by low temperatures and any concrete so damaged shall be removed and replaced by him at his expense.
(J) Curing.
(1) Driveway aprons must be cured by one of the following methods:
(a) Apply specified curing compound with brush, roller, or spray at the rate of one gallon for every 250 square feet of surface.
(b) Place burlap on the finished surface, saturate with water, and cover with an impermeable covering.
(c) Place polyethylene sheeting as soon as the concrete has hardened sufficiently to prevent marring of the surface. Wet the surface of the concrete immediately before the sheeting is placed. The edges of the sheeting shall be weighted securely with a continuous windrow of earth or any other means satisfactory to the village to provide an airtight cover.
(2) Any of the above curing methods must remain in place for not less than six days.
(K) Backfill. After the concrete has been cured forms shall be removed and the space near the edges of the driveway shall be backfilled to the required elevation with material approved by the village. The material shall be compacted then until firm and the surface evenly graded.
(L) Disposal of surplus material. Surplus or waste material resulting from the driveway apron construction operation shall be disposed of by the contractor.
(M) Control of materials. The contractor or owner shall, at his expense, have a commercial testing laboratory prepare and test samples of delivered concrete. One set of tests shall be taken for the first 25 cubic yards or fraction thereof, and one set of the tests shall be taken for each additional 50 cubic yards. A set of tests shall consist of four standard cylinders (two shall be broken at seven days and two shall be broken at 28 days), one slump test and one air content test. The laboratory shall perform tests in accordance with the recognized ASTM standards and shall submit written reports of such tests to the Village Engineer for review.
(N) Guarantee and bond.
(1) All work constructed under these standards shall be guaranteed by the contractor to be free from defects in workmanship and materials for a period of one year from the date of written acceptance of the completed work by the village. He shall replace or repair any defective work or material upon written notice from the village that such defects exist.
(2) A bond shall be deposited with the village in the amount of 15% of the improvement cost at the time of acceptance of the driveway aprons as collateral security for the guarantees.
(Ord. 77-05, passed 4-6-77) Penalty, see § 156.99