9-23Concrete Curing Materials, Bonding Agents, and Admixtures

9-23 Concrete Curing Materials, Bonding Agents, and Admixtures9-23 Concrete Curing Materials, Bonding Agents, and Admixtures

9-23.1 Sheet Materials for Curing Concrete

Sheet materials for curing concrete shall meet the requirements of ASTM C171, Sheet Materials for Curing Concrete, except that only white reflective type shall be used.

9-23.2 Liquid Membrane-Forming Concrete Curing Compounds

Liquid membrane-forming compounds for curing concrete shall conform to the requirements of ASTM C309 Type 1 or 2, Class A or B, except that the water retention when tested in accordance with WSDOT T 814 shall be 2.50 grams for all applications. Each lot of liquid membrane-forming curing compound shall be sampled at the project site and tested for acceptance. Liquid membrane-forming curing compound shall not be used in the absence of satisfactory test results.

9-23.3 Water Repellent Compound

The water repellent compound shall be a clear, penetrating type, silicone resin base compound containing no filler or other material which will leave a film on the surface of the masonry after it is applied. It shall be of such consistency that it can be applied readily by brush or spray to the masonry at atmospheric temperature down to -20ºF. The average absorption of three test specimens treated with the water repellent compound, when tested in accordance with ASTM D6532, shall not exceed 2 percent after being partially immersed in water for 72 hours immediately after curing. Water Repellent Compounds shall be a product listed in the WSDOT Qualified Products List (QPL). Acceptance of each lot of the Water Repellent Compound for use on the project shall be based on a Manufacturer’s Certificate of Compliance.

9-23.4 Sodium Metasilicate

Sodium metasilicate shall comply with ASTM D537.

9-23.5 Burlap Cloth

Burlap cloth shall meet the requirements of AASHTO M182, Class 4.

9-23.6 Chemical Admixtures for Concrete

Acceptance of chemical admixtures will be based on Manufacturer’s Certificate of Compliance. If required by the Engineer, admixtures shall be sampled and tested before they are used. A 1-pint (500-milliliter) sample of the admixture shall be submitted to the WSDOT Headquarters Materials Laboratory for testing 10 days prior to use. Chemical Admixtures shall contain less than 1 percent chloride ion (Cl-) by weight of admixture.

9-23.6(1) Air-Entraining Admixtures

Air-Entraining admixtures shall meet the requirements of AASHTO M154 or ASTM C260.

9-23.6(2) Type A Water-Reducing Admixtures

Type A Water-Reducing admixtures shall conform to the requirements of AASHTO M194 Type A or ASTM C494 Type A.

9-23.6(3) Type B Retarding Admixtures

Type B Retarding admixtures shall conform to the requirements of AASHTO M194 Type B or ASTM C494 Type B. M 41-10 Page 9-129 Concrete Curing Materials, Bonding Agents, and Admixtures 9-239-23.6(4) Type C Accelerating Admixtures Type C Accelerating admixtures shall conform to the requirements of AASHTO M194 Type C or ASTM C494 Type C, and only nonchloride accelerating admixtures shall be used.

9-23.6(5) Type D Water-Reducing and Retarding Admixtures

Type D Water-Reducing and Retarding admixtures shall conform to the requirements of AASHTO M194 Type D or ASTM C494 Type D.

9-23.6(6) Type E Water-Reducing and Accelerating Admixtures

Type E Water-Reducing and Accelerating admixtures shall conform to the requirements of AASHTO M194 Type E or ASTM C494 Type E, and only nonchloride accelerating admixtures shall be used.

9-23.6(7) Type F Water-Reducing, High Range Admixtures

Type F Water-Reducing, High Range admixtures shall conform to the requirements of AASHTO M194 Type F or ASTM C494 Type F.

9-23.6(8) Type G Water-Reducing, High Range, and Retarding Admixtures

Type G Water-Reducing, High Range, and Retarding admixtures shall conform to the requirements of AASHTO M194 Type G or ASTM C494 Type G.

9-23.6(9) Type S Specific Performance Admixtures

Type S Specific Performance admixtures are limited to ASR-mitigating, viscosity modifying, shrinkage reducing, rheology-controlling, and workability-retaining admixtures. They shall conform to the requirements of ASTM C494 Type S. When a Type S admixture is used, a report on the performance characteristics of the Type S admixture shall be submitted along with the WSDOT concrete mix design (WSDOT Form 350-040). The report shall describe the performance characteristics and provide data substantiating the specific characteristics of the Type S admixture in accordance with ASTM C494.

9-23.7 Vacant

9-23.8 Waterproofing

Concrete made with waterproofing admixtures shall have a percent absorption after immersion and boiling of less than 5.0 percent at 7 days and a volume of permeable voids less than 11 percent at 7 days per ASTM C642. The Contractor shall submit evidence in the form of test results showing compliance with these specifications, when they submit their concrete mix design. If the concrete requires air entrainment, the Contractor shall also submit evidence to the Engineer that the admixture will not adversely effect the air void system of the hardened concrete. Test results complying with ASTM C457 shall be provided as evidence to satisfy this requirement.

9-23.9 Fly Ash

Fly ash shall conform to the requirements of AASHTO M295 Class C or F including supplementary optional chemical requirements as set forth in Table 2. Fly ash that exceeds the available alkali limits set in AASHTO M295 Table 2 may be used if they meet the tests requirements of Section 9-03.1(1) . The supplementary optional chemical limits in AASHTO M295 Table 2 do not apply to fly ash used in Controlled Density Fill. Page 9-130 M 41-10

9-23 Concrete Curing Materials, Bonding Agents, and Admixtures9-23.9(1) Tests and Acceptance

Fly ash may be accepted by the Engineer based on the Manufacturer’s Mill Test Report Number indicating full conformance to the Specifications. All shipments of the fly ash to the Contractor or concrete supplier shall identify the applicable Mill Test Report Number. The concrete supplier or Contractor shall provide mill test identification on all concrete deliveries. Fly ash producers, importers/distributors, and suppliers that certify fly ash shall participate in the fly ash acceptance program as described in WSDOT QC 4. Each mixing facility or plant utilizing fly ash shall be equipped with a suitable means or device for obtaining a representative sample of the fly ash. The device shall enable the sample to be readily taken in proximity to the fly ash weigh hopper and from a container or conveyor holding only fly ash. Fly ash may be tested using samples taken at the job site by the Engineer for submission to the State Materials Laboratory for testing.

9-23.10 Ground Granulated Blast Furnace Slag

Ground granulated blast furnace slag shall meet the requirements of AASHTO M 302, Grade 100 or Grade 120. The grade of the ground granulated blast furnace slag, the source, and type of manufacturing facility shall be certified on the cement mill test certificate.

9-23.10(1) Tests and Acceptance

Ground granulated blast furnace slag may be accepted by the Engineer based on the Manufacturer’s Mill Test Report Number indicating full conformance to the Specifications. All shipments of the ground granulated blast furnace slag to the Contractor or concrete supplier shall identify the applicable Mill Test Report Number. The concrete supplier or Contractor shall provide mill test identification on all concrete deliveries. Ground granulated blast furnace slag producers, importers/distributors, and suppliers that certify ground granulated blast furnace slag shall participate in the ground granulated blast furnace slag acceptance program as described in WSDOT QC 5. Each mixing facility or plant utilizing ground granulated blast furnace slag shall be equipped with a suitable means or device for obtaining a representative sample of the ground granulated blast furnace slag. The device shall enable the sample to be readily taken in proximity to the ground granulated blast furnace slag weigh hopper and from a container or conveyor holding only ground granulated blast furnace slag. Ground granulated blast furnace slag may be tested using samples taken at the job site by the Engineer for submission to the State Materials Laboratory for testing.

9-23.11 Microsilica Fume

Microsilica Fume shall conform to the requirements of AASHTO M307. The optional physical requirement for Reactivity with Cement Alkalies set forth in Table 3 will be required when Microsilica Fume is being used as an ASR mitigation measure.

9-23.12 Natural Pozzolan

Natural Pozzolans shall be ground Pumice and shall conform to the requirements of AASHTO M295 Class N, including supplementary optional chemical requirements as set forth in Table 2. M 41-10 Page 9-131 Concrete Curing Materials, Bonding Agents, and Admixtures 9-239-23.13 Blended Supplementary Cementitious Material Blended Supplementary Cementitious Material (SCM) shall meet the requirements of ASTM C1697. Blended SCMs shall be limited to binary or ternary blends of fly ash, ground granulated blast furnace slag, and microsilica fume. Fly ash shall meet the requirements of Section 9-23.9 . Ground granulated blast furnace slag shall meet the requirements of Section 9-23.10 . Microsilica fume shall meet the requirements of Section 9-23.11 . The individual SCMs composing the blended SCM shall be individually listed on the WSDOT Qualified Products List.