Division 300 — Section 301
300-1 DIVISION 300 BASES AND SUBBASES
301.1 Description
1 Modify an existing subgrade by adding Portland cement to form a prepared subbase for a pavement structure.
301.2 Materials
301.2.1 Portland Cement
1 Use Portland cement that conforms to Subsection 701.2.1 with the allowable maximum alkali content (N a2O + 0. 658K 2O) increased to 1.0%.
301.2.2 Water
1 Use water conforming to Subsection 701.2.11.
301.2.3 Soil
1 Use soil consisting of the material in the existing subgrade prepared according to Section 208.
301.2.4 Asphalt Material
1 Use an asphalt curing coat that conforms to Subsection 401.2.1.3.
301.3 Construction
301.3.1 General
1 Comply with the following responsibilities: •Regulate the sequence of work to process the necessary quantity of material to provide the specified full depth of modification, •Use the proper amount of Portland cement, •Maintain the work, and •Rework the base and subbase courses as necessary to meet t he r equirements of this specification .
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