193214.02—Detail Requirements
a.Blended hydraulic cement shall conform to AASHTO M240 and only used as approved by the Engineer.
b.Portland cements shall conform to AASHTO M85 except as follows:
1.The Department will permit SO3 content as specified in AASHTO M85 provided supporting data specified in AASHTO M85 are submitted to the Department for review and acceptance prior to use of the material.
2.Type I and Type II cement shall contain not more than 1.0 percent alkalies (% Na2O + % 0.658K20).
c.Expansive hydraulic cement shall conform to ASTM C 845, Type K. SECTION 215—HYDRAULIC CEMENT CONCRETE ADMIXTURES
215.01 Description
These specifications cover materials that are chemical or organic elements that may be added to a hydrau - lic cement concrete mixture, when permitted elsewhere in these specifications, to achieve some desired effect.
215.02 Materials
a.Air-entraining admixtures shall conform to AASHTO M154.
b.Water-reducing and retarding admixtures shall conform to AASHTO M194, Type D, and shall be free from water-soluble chlorides. The Department will not permit the use of water-reducing and retarding admixtures that have not been tested for compatibility with the brand, type, source, and quantity of cement proposed for use until tests have been performed in accordance with VTM-16 and the test results verify conformance to the requirements of Table I therein.
c.Water-reducing admixtures shall conform to AASHTO M194, Type A, and shall be free from water-soluble chlorides.
d.Accelerating admixtures shall conform to AASHTO M194, Type C or Type E.
e.High-range water-reducing and high-range water-reducing and retarding admixtures shall conform to AASHTO M194, Type F or Type G, and shall be free from water-soluble chlorides.
f.Calcium chloride shall conform to AASHTO M144, Type 2.
g.Pozzolan shall conform to Section 241.215.02 194(h) Granulated iron blast-furnace slag shall conform to ASTM C989, Grade 100 or 120.
i.Silica fume shall conform to AASHTO M307.
j.Corrosion inhibitor shall contain a minimum 30 percent solution of calcium nitrate or other Department approved material.
k.Metakaolin shall conform to AASHTO M321.
215.03 Detail Requirements
Approved admixture(s) shall be used in concrete in the proportions recommended by the manufacturer to obtain the optimum effect where seasonal, atmospheric, or job conditions dictate its use. The Contractor shall use only admixtures (a) through (e) that appear on the Materials Division Approved Products List. The Department will base its initial approval of such admixtures on indepen - dent laboratory data submitted by the manufacturer verifying conformance to the specific admixture requirements. Thereafter, the manufacturer shall annually provide the Engineer a written certification that the material currently being furnished is identical in both composition and chemical concentrations to that tested by the independent laboratory. The manufacturer shall also supply a certification stating that that the chemical composition of the mate - rial is essentially the same as that of the approved mixture if the Contractor proposes to use an admixture that differs in concentration from the acceptance sample. The Department will permit the use of pump-aid admixtures when the Engineer authorizes placing con - crete by pumping, provided these are used in accordance with the manufacturer’ s recommendations. SECTION 216—W ATER FOR USE WITH CEMENT OR LIME
216.01 Description
These specifications cover water for use in mixing with cement or lime.
216.02 Detail Requirements
Water shall be clean, clear, and free from oil, acid, salt, alkali, organic matter, or other deleterious substances. Water that has been approved for drinking purposes (potable) may be accepted without testing for use in hydraulic cement concrete, cement, or lime stabilization. The Engineer must approve water from other sources as well as pumping methods planned by the Contractor before use. The acidity or alkalinity of water will be determined colorimetrically or electrometrically. Water shall have a pH between 4.5 and 8.5. When subjected to the mortar test in accordance with AASHTO T26, water shall 215.02
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 221–221 of 1,065.