Masonry Grouting

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8.5" x 11"
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04 05 16
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Masonry Grouting

Use this 3 part SimpleSpecs master specification to specify grout for use in masonry construction. This section is referenced in other masonry sections that require grout.

Masonry grouting is a critical construction technique used to enhance the structural integrity and various resistive properties of masonry assemblies. It involves the filling of voids within and between masonry units (such as bricks, blocks, or stones) with grout—a fluid form of concrete or mortar. This process ensures the masonry components act cohesively to improve strength, durability, and resistance against environmental factors. Here are the fundamental aspects of masonry grouting:

Key Components of Grout

Grout used in masonry work typically consists of cement, water, fine aggregates (like sand), and sometimes additives to improve flowability and setting times. It’s categorized into two types based on its composition:

  1. Fine Grout: Contains smaller aggregates, making it suitable for filling narrow spaces.
  2. Coarse Grout: Includes larger aggregates, designed for filling larger cavities and spaces.

Importance of Masonry Grouting

The primary purpose of masonry grouting includes:

  • Enhancing Structural Integrity: By filling voids, grout binds individual masonry units together, distributing loads more evenly across the structure.
  • Improving Durability: Grouting protects the internal parts of masonry from moisture ingress, chemicals, and other damaging agents, thereby extending the lifespan of the structure.
  • Increasing Resistance: Properly grouted masonry can offer increased resistance to seismic activities, fire, and sound transmission, contributing to the safety and comfort of the built environment.

Application Techniques

Masonry grouting can be performed using different methods, depending on the specific requirements of the construction project:

  • Pouring or Pumping: Grout is poured or pumped into the cavities of the masonry structure, typically through holes at the top or sides. This method requires careful attention to ensure complete filling and avoid air pockets.
  • Low-Lift Grouting: Involves filling grout in layers, allowing each layer to slightly set before adding the next, which is useful for controlling the pressure and ensuring thorough filling.
  • High-Lift Grouting: Grout is placed in higher continuous sections, requiring specialized equipment to pump the grout to necessary heights.

 

Masonry grout is used to fill voids in masonry assemblies including voids in the masonry units themselves and voids between masonry wythes.

Coarse masonry grout works well in most applications. Fine grout is required when the space between steel reinforcing is too close to permit coarse aggregate to pass.

Associations

To learn more about grout, visit National Concrete Masonry Association.

 

Related SimpleSpecs specification template:

04 05 13 – Masonry Mortaring

 

 

Masonry Grouting

Industry Resources
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