This article is about grouting, Types of grouting materials, pre-grouting steps and grouting inspection procedure & other important steps are highlighted in this article.
Non shrink structural grout shall be shipped to the job site in bags and shall be received,stored and handled in accordance with procedure Receipt, Storage and Handling of Products. Specifically, bagged grout shall be stored in accordance with Storage Requirements. Any nonconforming items shall be processed in accordance with procedures.
Construction QA/QC team shall be given the opportunity to review manufacturer’s literature, including compressive test results, prior to the grout being used on the job site.
The contractor shall submit his procedures, suggested vendors and manufacturer’s literature along with the proposed plan for placement to QA/QC for review prior to the first placement.
Grout Placement Procedure:
Non shrink grout shall be mixed, placed, cured and tested in accordance with the manufacturer’s recommendations and/or job site specifications and procedures.
Key Inspection Attributes:
Following are minimum key inspection items that should be checked and/or verified as part of grout placement activities.
- verify that the grout meets the requirements of the job in regard to intended use, required compressive strength and workability
- check the date on the grout bags to insure that the grout has not exceeded the indicated shelf life
- verify that the concrete foundation that will receive the grout has been cleaned, roughened and saturated with water for 24 hours prior to grout placement.
- verify that the grout has been mixed per manufacturer’s literature. It is recommended that a test batch be mixed prior to the first production placement to verify that workability and compressive strength requirements are met.
- verify the temperature of the mixed grout to insure compliance to specifications and/or manufacturer’s literature. Ice water or hot water should be considered as means of regulating the mixed grout temperature.
- verify that grout forms have been constructed to facilitate rapid, continuous placement and complete filling of the space to be grouted.
- verify that, depending on the size of the grout placement, the form on the grout placing side has been constructed at a 45°
- verify that for large grout placements, metal bands or straps have been placed under the base plates to facilitate moving grout into difficult areas. These should only be used if allowed by the grout manufacturer.
- verify that grouting only proceeds from the grout placing side of the form to prevent the entrapment of air pockets
- verify that all required testing is done in accordance with specifications. Generally, non-shrink grout cubes should be made, cured and tested in accordance with Project specification and should be recorded on a form.
- verify that the grout is cured in accordance with manufacturer’s recommendations and/or specifications.