701— Portland Cement and Portland Cement Concrete

700-1 Division 700

STRUCTURES Cement Concrete 701.1 Description 1 Furnish, stor e, and handl e the materials , and proportion, mix, and deliver the Portland cement concrete. 701.2 Materials 701.2.1 Cement 1 Use Portland or blended Portland cement as specified hereafter . 701.2.1.1 Equivalent Alkalis 1 Comply with the requirements for low -alkali cement, defined as an equivalent alkali ( Na2O + 0.658K 2O) measurement equal to or less than 0.60%, except as noted in the following paragraph. 2 For precast items included in Section s 714 and 719, ensure that cement with alkali contents greater than 0.60% to a maximum of 0.75% are only used with the following conditions. Unless the use of high alkali cement is explicitly allowed, produce high alkali cement concrete using a supplementary cementitious material (SCM) as given herein. Use a replacement of 20% of the cement at a ratio of 1.2:1 with Type F fly ash as designated in Subsection 701.3.10, or replace at a ratio of 1:1 by weight with at least 30% but no more than 50% of the cement with granu lated blast -furnace slag from a source included on Qualified Products List 18 as designated in Subsection 701. 3.10. 701.2.1.2 Allowable Cement Types 1 Use one of the following types of Portland and blended Portland cement as specified hereafter. 2 Use Portland cement meeting the requirements of AASHTO M 85 from sources included on Qualified Product s List 6 . 3 Use Type IS Portland blast -furnace slag cement meeting the requirements of AASHTO M 240 from sources included on Qualified Product s List 18. Ensure that the slag constituent is 25% or less of the total weight of the Portland blast -furnace slag cement. 4 Use Type IL Portland- limestone cement meeting the requirements of AASHTO M 240 from sources included on Qualified Product s List 86 . Ensure