10-36 Section 1005. Mortar and Grout Mixtures
1005.01 Description
This work consists of producing and furnishing mortars and grouts.
1005.02 Materials
Provide materials in accordance with the following: Portland Cement Type I, Type IA .......................................................... 901 Masonry Cement Type N, Type S, Type M ........................................... 901 Hydrated Lime Type S, Type SA .......................................................... 901 Fine Aggregate 2NS, 2MS .................................................................... 902 Air-Entraining Admixture ....................................................................... 903 Water .................................................................................................... 911
A.Standard Mortars and Grouts . Proportion cement and fine aggregates as specified in Table 1005-1 and Table 1005- 2 by weight for batches of at least 1 cubic yard and by weight or volume for smaller batches . Add water to obtain a mortar or grout of the required consistency.
B.Non-shrinking Mortar and Grout, Type H -1 (Non -metal lic). Provide Type H -1 non- shrinking mortar and grout, selected from the Qualified Products List, for filling post -tensioning stress pockets in fascia beams of prestressed box beams, under leveling plates supporting structures, for grouting dowe ls, and under temporary supports .
C.Expansive Grout, Type E -1. Provide Type E-1 expansive grout for filling the void around post -tensioned tendons in precast concrete box beams . Proportion the grout as follows:
1.Type I portland cement, 94 pounds;
2.Water no gre ater than 5 gallons; and
3.Expansive admixture, as recommended by the manufacturer. Do not use sand in the grout mixture. Do not use grout containing aluminum or other components that produce hydrogen, carbon dioxide, or oxygen gas. Ensure that grout attains a 28-day minimum compressive strength of 3,000 psi in accordance with ASTM C942, except proportion the grout as specified in this subsection. Do not use expansive admixtures, plasticizing, or water -reducing agents that contain chloride ions in excess of 0.50% by weight, fluorides, sulfides, nitrates, thixotropic additives, or chemicals that may contribute to stress corrosion in steel. MDOT Standard Specifications for Construction Section 1005 10-37 Provide admixtures in liquid or solid form . Use a gas -evolving material, well dispersed throughout the admixture. Provide grout with an unrestrained expansion from 5 to 10% , in accordance with ASTM C940/C490M , except proportion the grout as specified in this subsection and determine expansion at 3 hours.
1005.03 Construction
The contractor may remix mortars and grouts. Do not retemper mortars and grouts or use grout and mortar after it begins to set. Do not place mortar and grout on materials that are below 40°F . Provide protection to maintain a temperature of 45°F or higher during the curing period.
1005.04 Measur ement and Payment
The cost of producing and furnishing mortar and grout is included in the unit prices for other relevant pay items. MDOT Standard Specifications for Construction Section 1005 10-38 Table 1005- 1: Proportioning Standard Mortars and Grouts by Dry Weight Mortar or Grout Type General Use Materials Mix Proportions by Dry Weight (lb/cyd) Portland Cement Masonry Cement Hydrated Lime Fine Aggregate Portland Cement Masonry Cement Hydrated Lime Fine Aggregate Net Water R-1 (grout) Bond or primer c oat Type I, IA — — 2NS 1175 — — 964 705 R-2 (mortar)(a) Patching spalls; f illing space between b ox beams — Type M — 2MS — 930 — 2137 415 Type I Type N — 2MS 468 349 — 1991 415 Type I, IA — Type S, SA 2MS 828 — 75 2016 415 Type I, IA — — 2MS,2NS 930 — — 1966 415 R-3 (mortar)(a) Setting precast c oncrete barriers; filler between slope protection blocks and riprap Type I, IA — — 2NS 765 — — 2266 353
a.Provide an entrained air content of 14 % ±4% for mortars by using masonry cement, Type IA portland cement, Type SA lime, or an air -entraining admixture . Do not combine masonry cement and Type IA portland cement or Type IA portland cement and Type SA lime unless tests indicate that the air content is within acceptable limits. MDOT Standard Specifications for Construction Section 1005 10-39 Table 1005- 2: Proportioning Standard Mortars and Grouts by Bulk Volume Parts Mortar or Grout Type General Use Materials Mix Proportions by Bulk Volume Parts Portland Cement Masonry Cement Hydrated Lime Fine Aggregate Portland Cement Masonry Cement Hydrated Lime Fine Aggregate R-1 (grout) Bond or primer c oat Type I, IA — — 2NS 1 — — 1 R-2 (mortar)(a) Patching spalls; f illing space between b ox beams — Type M — 2MS — 1 — 2½ Type I Type N — 2MS (b) (b) — (b) Type I, IA — Type S, SA 2MS (b) — (b) (b) Type I, IA — — 2MS, 2NS 1 — — 2½ R-3 (mortar)(a) Setting precast c oncrete barriers; filler between slope protection blocks and riprap Type I, IA — — 2NS 1 — — 3½
a.Provide an entrained air content of 14 % ±4% for mortars by using masonry cement, Type IA portland cement, Type SA lime, or an air-entraining admixture . Do not combine masonry cement and Type IA portland cement, or Type IA portland cement and Type SA lime, unless tests indicate tha t the air content is within acceptable limits.
b.Do not proportion by volume if blending cementitious materials (portland cement, masonry cement, or lime).
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 1074–1077 of 1,146.