801Cement and Admixtures

Cement and Admixtures

801.1Portland Cement

801.1.1 General

1 Use masonry cement in accordance with ASTM C 91.

2 Use portland cement in accordance with ASTM C 150, as follows:

3 Use portland cement from only one mill for any brand and type, unless otherwise approved by the engineer. Keep cement dry; the engineer will reject cement that has partially set or contains caked lumps. Do not use salvaged cement from discarded or used bags.

801.1.2 Type V Portland Cement

1 Use cement with an equivalent alkali limit of 0.65% or less in accordance with ASTM C 150.

801.2Fly Ash

1 Use fly ash in accordance with ASTM C 311 and ASTM C 618 for class C or F. Before use, obtain approval of the source from the Materials Program; approval will be based on test results provided by the fly ash supplier using the following sampling frequency:

Monthly ASTM C 618 results for composite samples for a six month period.

2 A list of approved sources of fly ash is available from the Materials Program.

3 The requirements in ASTM C 618, table 3, also apply if the Materials Program determines that the aggregate sources are reactive.

801.3Blended Hydraulic Cement

1 Use blended hydraulic cement in accordance with ASTM C 595 for type I (PM)

Cement and Admixtures SECTION 801

pozzolan-modified portland cement. Use pozzolan in accordance with ASTM C 618 and ASTM C 311. If the pozzolan consists of fly ash, obtain approval from the Materials Program prior to its use. Use portland cement in accordance with Subsection 801.1, Portland Cement.

801.4Admixtures

1 Use concrete admixtures in accordance with the following:

C 260).

Shrinkage-Reducing Admixtures. Meet the requirements of AASHTO M 194 (ASTM C 494). Do not use admixtures containing calcium chloride.

AASHTO M 307 (ASTM C 1240), including Table 3.

801.5Synthetic Fibers

1 Use 100 percent polypropylene collated, fibrillated fibers with the physical properties shown in Table 801.5-1, Synthetic Fiber Properties.

Table 801.5-1 Synthetic Fiber Properties Property Value Specific Gravity, min. 0.91 Modulus of Elasticity 500,000 to 700,000 psi [3450 to 4830 MPa] Tensile Strength 70,000 to 110,000 psi [485 to 760 MPa] Length Maximum ( 1 in [25 mm])

2 Ensure the polypropylene fibers are specifically manufactured from virgin polypropylene, containing no reprocessed olefin materials. Ensure product documentation includes certification from the original manufacturer of the fibers.

801.6Slag Cement

1 Use Grade 100 or Grade 120 slag cement with a maximum Aluminum Oxide content of 11.0% in accordance with ASTM C 989. Before use, obtain approval of the source from the Materials Program; approval will be based on test results provided by the slag cement supplier using the following sampling frequency:

Monthly ASTM C 989 results for composite samples for a six month period.

2 A list of approved sources of slag cement is available from the Materials Program.