New Jersey

Department of Transportation

Standard Specifications

for Road and Bridge Construction

2007


NJDOT C-2 – Quick-Setting Patch Materials

  1. Scope. This test method is used for determination of quick-set patch materials properties for approval and quality assurance.

  2. Apparatus. Use apparatus as needed to perform testing according to AASHTO T 22, AASHTO T 27, AASHTO T 106, AASHTO T 126, AASHTO T 160, AASHTO T197, AASHTO T 260, and ASTM C 672.

  3. Procedure. Perform the following steps:

    1. Preparation of Samples. Prepare samples according to manufacturer’s recommendations. If several design mixes are given, test the material with the highest allowable water amount that is consistent with its intended use as a patching material. If the material is to be used at temperatures different than 70 °F, the ME may test the time of set, bond, and compressive strength at a different temperature in the allowable range of temperature.

    2. Tests. Test materials according to the following:

      1. Time of Set. Run time of set test according to AASHTO T 197 except cardboard molds may be used.

      2. Strength Development. For Type 1 and 2, test 2 cubes per test according to AASHTO T 106. For Type 1A and 1B, make two 4 × 8-inch cylinders per test according to AASHTO R 36. Cure specimens covered with a plastic cover over the cylinder for 3 hours and then cure without the plastic cover at 70.4 to 76.4 °F and 50 percent relative humidity until testing. Test according to AASHTO T 22.

      3. Bond Strength - Arizona Shear Method. Prepare four 4 × 8-inch composite cylinders consisting of a base cylinder of hardened conventional concrete and an upper portion of the patching material.

        Make the base concrete from 4 × 8-inch cylinders having a minimum compressive strength of 5000 pounds per square inch. Cut the cylinders into equal halves along a 30-degree angle with the vertical axis. After being cut, etch the base cylinders with a 50 percent solution of hydrochloric acid and placed in 4 × 8-inch cylinder molds with cut face up.

        When preparing the composite cylinders, brush a small amount of the patching material into the saw-cut surface of the base cylinder. Fill the remaining half of the cylinder mold with patching material using the standard consolidation procedures defined in AASHTO R 36. Cure specimens covered with a plastic cover over the cylinder for 3 hours and then cure without the plastic cover at 70.4 to 76.4 °F and 50 percent relative humidity until testing. Remove the cylinders from the mold after 24 hours. Test 2 specimens at 7 days and 2 specimens at 28 days according to AASHTO T 22.

      4. Expansion-Shrinkage. Monitor change in volume and length from batching until the materials reach equilibrium. Prepare four 2 × 2 × 10-inch autoclave bars according to AASHTO T 160 for Type 1 and Type 2. Prepare four 3 × 3 × 10-inch autoclave bars according to AASHTO T 160 for Type 1A and 1B. Cure at 70.4 to 76.4 °F and 50 percent relative humidity for 24 hours. Record initial reading after 24 hours, then place 2 bars in water bath in moisture room and leave the other bars in the initial curing conditions. Take a reading on each bar every 24 hours until stability has been attained.

      5. Durability. Prepare four 4 × 8-inch cylinders for each material. Test 2 cylinders according to AASHTO T 22 for 28-day compressive strength. Test the remaining 2 cylinders as follows:

        1. Cure for 24 hours at 70.4 to 76.4 °F and 50 percent relative humidity, followed by 6-day cure in a lime water solution.
        2. Following the 7-day cure period, begin a 50-cycle freeze-thaw test. Each cycle will consist of 16 hours freeze (air) and 8 hours thaw (solution). Proportion the durability solution by weight of 96 percent water, 3.2 percent sodium chloride, and 0.8 percent calcium chloride.
        3. After every tenth cycle, examine cylinders visually and record condition according to ASTM C 672.
        4. At the end of the 50 cycles, perform compressive test according to AASHTO T 22 and report the results as a percentage of the 28-day compressive strength result.

      6. Permeability. Prepare one 4 × 8-inch cylinder and cure for 24 hours at 70.4 to 76.4 °F and 50 percent relative humidity. Saw cut the cylinder into two 4 × 4-inch cylinders. Seal all sides and the bottom with hot paraffin, leaving the saw-cut surface exposed. Place cylinders in durability solution noted in Step e for 7 days. Measure the amount of chlorides at the 1-inch, 2-inch, and 3-inch levels, from the top surface, according to AASHTO T 260.

      7. Chlorides in Raw Material. Measure the amount of chlorides according to AASHTO T 260.

      8. Color. Note the color of the cured material.

      9. Sieve Analysis. For Type 1B Patch, analyze the 1/2-inch, 3/8-inch, No. 4, No. 8, and No. 16 sieves according to AASHTO T 27. Report the amount and type of aggregate at approval.

  4. Report. Include the following in the report:
    1. Manufacturer and name of product.
    2. Type of Patch material.
    3. Mix design used.
    4. Temperature tested at.
    5. Time of Set to the nearest minute.
    6. Strength Development to the nearest 10 pounds per square inch.
    7. Bond Strength to the nearest 10 pounds per square inch.
    8. Expansion/Shrinkage to 0.01 percent.
    9. Durability to the nearest whole number.
    10. Permeability to the nearest 0.1 pounds per cubic yard.
    11. Chlorides to the nearest 0.01 percent.
    12. Color of material.
    13. Sieve Analysis to nearest 0.1 percent.

Last Document Correction:
December 14, 2007