FHWA FP-24Public Domain

Section 701 — Cementitious Material

Division 700 — Material|PDF pages 799–801

701.01Hydraulic Cement. Do not mix cement brands or types.

(a)Portland cement. Conform to AASHTO M 85.

(b)Blended hydraulic cement. Conform to AASHTO M 240.

701.02Reserved.

701.03Pozzolans.

(a)Fly ash. Conform to AASHTO M 295, Class C, Class F , or Class N. Available alkalies as equivalent Sodium Oxide (Na 2O) 1.5 percent maximum

(b)Slag cement . Conform to AASHTO M 302, Grade 100 or Grade 120. Total alkalies as equivalent Na 2O 1.0 percent maximum

(c)Silica fume (microsilica). Conform to AASHTO M 307. Total alkalies as equivalent Na2O 1.0 percent maximum

(d)High -reactivity pozzolans. Conform to AASHTO M 321. Total alkalies as equivalent Na 2O 1.0 percent maximum

701.04Grout .

(a)Neat hydraulic cement grout.

(1)Ground anchors, micropiles, and soil nails. Provide a pumpable mixture of portland cement, sand, water, and admixtures. Use hydraulic cement conforming to Subsection 701.01 . If sand is added, provide sand conforming to Subsection 703.01. Provide water conforming to Subsection 725.01(a) . Provide the minimum water content necessary for placement and a maximum water to cementitious material ratio of 0.45 by mass. Chemical admixtures that control bleed or retard set may be used provided the additives conform to Subsection 711.03 and are mixed according to the manufacturer’s recommendations. Do not use admixtures containing more than trace (from impurities, not as an intended constituent) quantities of chlorides, fluorides, aluminum, zinc, or nitrates. The maximum water -soluble chloride ion content of the grout is 0.06 percent by mass of cement when tested according to ASTM C1218. Provide grout conforming to the following minimum co mpressive strengths:

(a)Ground anchors 3500 psi at 7 days

(b)Micropiles 2500 psi at 7 days and 5000 psi at 28 days 782 (c) Soil nails 1500 psi in 3 days and 3000 psi in 28 days

(2)Miscellaneous applications. Provide a grout consisting of a mixture of hydraulic cement, water, and admixtures. Do not exceed a water to cementitious material ratio of 0.44. Do not exceed 20 percent of the cement by mass if fly ash is used. Admixtures to reduce water content, improve the flowability, control bleeding, or control shrinkage may be added according to the manufacturer’s recommendations. Provide admixtures free of chlorides, fluorides, sulphites, and nitrates.

(b)Non-shrink grout. Conform to ASTM C1107 and the following as specified:

(1)Provide a minimum compressive strength of 5000 pounds per square inch in 3 days.

(2)Provide a minimum compressive strength of 3000 pounds per square inch in 3 days.

(c)Grout for post -tensioned structures. Conform to the requirements of the PTI, Guide Specification for Grouting of Post-Tensioned Structures .

701.05Mortar.

(a)General mortar. Conform to ASTM C270. Use masonry cement Type M or S according to ASTM C91.

(b)Packaged repair mortar. Conform to ASTM C928, Type R1 and the following:

(1)Relative dynamic modulus of elasticity, ASTM C666, Method A 95 percent minimum

(2)Drying s hrinkage, ASTM C157, except as modified by ASTM C882 0.07 percent maximu m

(c)Latex -modified mortar. Conform to ASTM C1438, Type II.

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