Grout shall consist of cementitious material and aggregate in accordance with ASTM C 476 and the proportion specifications of Table R609.1.1. Type M or Type S mortar to which sufficient water has been added to produce pouring consistency can be used as grout.
GROUT PROPORTIONS BY VOLUME FOR MASONRY CONSTRUCTION
|TYPE||PORTLAND CEMENT |
OR BLENDED CEMENT
OR LIME PUTTY
|AGGREGATE MEASURED IN A DAMP, LOOSE CONDITION|
|Fine||1||0 to 1/10||21/4 to 3 times the sum of the volume of the cementitious materials||—|
|Coarse||1||0 to 1/10||21/4 to 3 times the sum of the volume of the cementitious materials||1 to 2 times the sum of the vol- |
umes of the cementitious materials
Where the following conditions are met, place grout in lifts not exceeding 12 feet 8 inches (3.86 m).
- The masonry has cured for at least 4 hours.
- The grout slump is maintained between 10 and 11 inches. (254 and 279 mm).
- No intermediate reinforced bond beams are placed between the top and the bottom of the pour height.
Table R609.1.2 Grout Space Dimensions And Pour Heights.
All cells containing reinforcement or anchor bolts shall be grouted solid. Grout shall be a plastic mix suitable for pumping without segregation of the constituents and shall be mixed thoroughly. Grout shall have a maximum coarse aggregate size of 3/8 inch (9.5 mm), shall be placed at an 8 to 11-inch (205 mm to 279 mm) slump, and shall have a minimum specified compressive strength of 2000 psi at 28 days in accordance with ASTM C 476, or when tested in an approved manner. Grout shall be placed by pumping or by an approved alternate method and shall be placed before any initial set occurs and in no case more than 11/2 hours after water has been added. Grouting shall be done in a continuous pour in lifts, in accordance with Section 609.1.2. Grout shall be consolidated at the time of placement in accordance with the following:
- Consolidate grout pours 12 inches (305 mm) or less in height by mechanical vibration or by puddling.
- Consolidate pours exceeding 12 inches (305 mm) in height by mechanical vibration, and reconsolidate by mechanical vibration after initial water loss and settlement has occurred.
Grout shall not be pumped through aluminum pipes.
Cleanouts shall be provided at the bottom course at each pour of grout where such pour exceeds 5 feet (1524 mm) in height and where required by the building official. Cleanouts shall be provided with an opening of sufficient size to permit removal of debris. The minimum opening dimension shall be 3 inches (76 mm). The cleanouts shall be sealed before grouting and after inspection.R609.1.5.1 Grouted multiple-wythe masonry.
Cleanouts shall be provided at the bottom course of the exterior wythe at each pour of grout where such pour exceeds 5 feet (1524 mm) in height. R609.1.5.2 Grouted hollow unit masonry.
A reinforced bond beam shall be provided in masonry walls at the top of the wall and at each floor level of each exterior wall. Masonry walls not extending to the roof line shall have a bond beam at the top of the wall.
Bond beams shall be one of the following:
1. 8 inches thick × 8 inches high masonry.
2. Precast units certified by the manufacturer for the uplift loads as set forth in the standard used for design of the building as specified in Section R301.2.1.1. Precast units shall be installed in accordance with the manufacturer’s specifications, and approved by the building official.