1021CONCRETE ADMIXTURES

1021.01 General. Admixtures shall be furnished in liquid form ready for use.

The admixtures shall be delivered in the manufacturer's original containers, bulk tank trucks or such containers or tanks as are acceptable to the Engineer. Delivery shall be accompanied by a ticket which clearly identifies the manufacturer and trade name of the material. Containers shall be readily identifiable as to manufacturer and trade name of the material they contain. Corrosion inhibitors and all other concrete admixtures shall be on the Department’s qualified product list. For the admixture submittal, a report prepared by an independent laboratory accredited by the AASHTO Materials Reference Laboratory (AMRL) for Portland Cement Concrete shall be provided. The report shall show the results of physical tests conducted no more than five years prior to the time of submittal, according to applicable specifications. However, for corrosion inhibitors the ASTM G 109 test information specified in ASTM C 1582 is not required to be from an independent lab. All other information in ASTM C 1582 shall be from an independent lab. Tests shall be conducted using materials and methods specified on a "test" concrete and a "reference" concrete, together with a certification that no changes have been made in the formulation of the material since the performance of the tests. Per the manufacturer’s option, the cement content for all required tests shall either be according to applicable specifications or 5.65 cwt/cu yd (335 kg/cu m). Compressive strength test results for six months and one year will not be required. Prior to the approval of an admixture, the Engineer reserves the right to request a sample for testing. The test and reference concrete mixtures tested by the Engineer will contain a cement content of 5.65 cwt/cu yd (335 kg/cu m). For freeze- thaw testing, the Department will perform the test according to Illinois Modified AASHTO T 161. The flexural strength test will be performed according to AASHTO T 177. If the Engineer decides to test the admixture, the manufacturer shall submit AASHTO T 197 water content and set time test results on the standard cement used by the Department. The test and reference concrete mixture shall contain a cement content of 5.65 cwt/cu yd (335 kg/cu m). The manufacturer may select their lab or an independent lab to perform this testing. The laboratory is not required to be accredited by AASHTO. The manufacturer shall include in the submittal the following information: the manufacturing range for specific gravity, the midpoint and manufacturing range for residue by oven drying, and manufacturing range of pH. The submittal shall also include an infrared spectrophotometer trace no more than five years old. If an accelerating admixture according to Article 1020.04 contains calcium salts, the midpoint and manufacturing range for residue by oven drying will not be required. For air-entraining admixtures according to Article 1021.02, the specific gravity allowable manufacturing range shall be established by the manufacturer and the test method shall be according to ASTM C 494. For residue by oven drying and pH, the allowable manufacturing range and test methods shall be according to ASTM C 260. Concrete Admixtures Art. 1021.05 For admixtures according to Articles 1021.03, 1021.04, 1021.05, 1021.06, and 1021.07, the pH allowable manufacturing range shall be established by the manufacturer and the test method shall be according to ASTM E 70. For specific gravity and residue by oven drying, the allowable manufacturing range and test methods shall be according to ASTM C 494. When test results are more than seven years old, the manufacturer shall re- submit the infrared spectrophotometer trace and the report prepared by an independent laboratory accredited by AASHTO. All admixtures, except chloride-based accelerators, shall contain a maximum of 0.3 percent chloride by weight (mass) as determined by an appropriate test method selected by the manufacturer. To verify the manufacturer test result, the Department will use Illinois Modified AASHTO T 260, Procedure A, Method 1. Random field samples may be taken by the Department to verify an admixture meets specification. A split sample will be provided to the manufacturer if requested. Admixtures that do not meet specification requirements or an allowable manufacturing range established by the manufacturer shall be replaced with new material.

1021.02 Air-Entraining Admixtures. Air-entraining admixtures shall be

according to AASHTO M 154.

1021.03 Retarding and Water-Reducing Admixtures. The admixture shall be

according to the following.

1021.04 Accelerating Admixtures. The admixture shall be according to

AASHTO M 194, Type C (accelerating) or Type E (water reducing and accelerating).

1021.05 Self-Consolidating Admixtures. The self-consolidating admixture

system shall consist of either a high range water-reducing admixture only or a high range water-reducing admixture combined with a separate viscosity modifying admixture. The one or two component admixture system shall be capable of producing a concrete that can flow around reinforcement and consolidate under its own weight without additional effort and without segregation. The high range water-reducing admixture shall be according to AASHTO M 194, Type F. The viscosity modifying admixture shall be according to ASTM C 494, Type S (specific performance). Art. 1021.06 Concrete Curing Materials

1021.06 Rheology-Controlling Admixture. The rheology-controlling admixture

shall be capable of producing a concrete mixture with a lower yield stress that will consolidate easier for slipform applications used by the Contractor. The rheology- controlling admixture shall be according to ASTM C 494, Type S (specific performance).

1021.07 Corrosion Inhibitor. The corrosion inhibitor shall be according to one

of the following.

1022.01 Membrane Curing Compounds. Membrane curing compounds shall

be according to ASTM C 309 and the following. The manufacturer shall provide the membrane curing compound manufacturing range for specific gravity and non-volatile content. The material will be sampled at the manufacturer’s plant by an authorized representative of the Department. The Engineer will test the sampled material and no material shall be used until it has been approved. Each container shall be legibly marked with the name of the manufacturer, the type (IDOT designation) or type/class (ASTM designation), the manufacturer’s batch or lot number, date of manufacture, and the Department’s test identification number. Approved material shall not be used after nine months from the date of manufacture, unless sampled and tested for re-approval by the Engineer. Material more than 18 months old from the date of manufacture shall not be used. Based on information provided in the safety data sheet, the Engineer reserves the right to reject the material due to health or safety concerns. Specimens used for determining moisture loss will be made and tested according to Illinois Modified AASHTO T 155. The membrane curing compound types shall be as follows.

CONCRETE ADMIXTURES in other states

• Missouri 1054 · Concrete Admixtures
• North Dakota 808 · CONCRETE ADMIXTURES