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// CODE SNIPPET

2122.8 Mortar and Grout

2020 FBC - Building, 7^th edition > 21 Masonry > 2113 Masonry Chimneys > 2122 High-Velocity Hurricane Zones— Reinforced Unit Masonry > 2122.8 Mortar and Grout

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2122.8.1

Mortar materials shall comply with TMS 602 Section 2.1. Grout materials shall comply with TMS 602 Section 2.2.

2122.8.2

Vertical alignment of cells to be grouted shall maintain clear, unobstructed, continuous, vertical cores measuring not less than 2¹/₂inches by 3 inches (51 mm by 76 mm) for fine aggregate grout and 3 inches by 3 inches (76 mm by 76 mm) for coarse aggregate grout as defined by ASTM C476. The architect or engineer may specify other grout space sizes which shall be permitted provided they comply with TMS 402 Section 1.203.2.1 and TMS 602 Section 3.5C.

2122.8.3

Placing of mortar and masonry units shall comply with TMS 602 Section 3.3.

2122.8.4 Grout Placement

Grout placement shall be in accordance with TMS 402 and TMS602.

2122.8.5 Confinement

Confine grout to the areas indicated on the project drawings. Use material to confine grout that permits bond between masonry units and mortar.

2122.8.6

Unless otherwise required, mix grout other than self-consolidating grout to a consistency that has a slump between 8 and 11 inches (203 and 279 mm). Self-consolidating grout shall comply with TMS 602.

2122.8.7

Grout shall be placed before any initial set has occurred, but in no case more than 1¹/₂hours after the mix-designed water has been added.

2122.8.8

Grout placement shall comply with Section 3.5 of TMS 602. Grouting shall be a continuous operation with grout pour height in accordance with Section 3.5C of TMS 602 and with grout lift height in accordance with Section 3.5D of TMS 602.

2122.8.9

Grouting shall be consolidated between lifts by puddling, rodding or mechanical vibration.

2122.8.10

Grout keys shall be formed between grout pours. Grout keys shall be formed between grout lifts when the first lift is permitted to set prior to placement of the subsequent lift.

Form a grout key by terminating the grout a minimum of 1¹/₂inches (38.1 mm) below a mortar joint.
Do not form grout keys within beams.
At beams or lintels laid with closed bottom units, terminate the grout pour at the bottom of the beam or lintel without forming a grout key.

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