Architectural / Civil QC Notes | CBT Aramco | Grouting

This article is about Architectural / Civil QC Notes related to topic of Grouting as per Saudi Aramco or International Standards. This questions can be useful for who are attending CBT Aramco Test or other international test for Mechanical QC Inspector or Engineer.

Architectural / Civil QC Notes | CBT Aramco | Grouting

GROUTING REFERENCE STANDARD AND CODES

– SATIP-Q-011-01 Epoxy Grout for Machinery Support.
– SATIP-Q-010-01 Cement Based Non-Shrink Grouting.
– 09-SAMSS-088  Aggregates for Concrete.
– SAES-Q-005  Concrete Foundations.
– SAES-Q-010   Cement Based, Non-Shrink Grout for Structural.
– SAES-Q-011   Epoxy Grout for Machinery Support.

PRE- GROUTING MEETING

A pre-grout meeting should be held at least one day prior to the grout pour to understand and agree on procedures to ensure all necessary materials are on hand and to clarify grouting responsibilities. The party present in this meeting should include  as a minimum, the grout manufacturing technical representative, the foreman in charge of the grouting activities, the grouting materials coordinator and the safety representative. A representative from grout manufacturer is recommended if the installation personnel are not familiar with the grouting materials, forming, installation, and so forth or if a special purpose equipment train is being installed.

GROUTING OF FOUNDATION GENERAL INFORMATION

– Before grouting see to it that the foundation is clean, dry and oil free.
– Soak/Moisten the surface with water at least 24 hours (NSCG).
– Start grouting from one side going to the other side to prevent air entrapment.
– Do not vibrate the grout as a means of helping it flow as this tends to separate the aggregate from the resin binder.
– Violent ramming of the grout is not permitted.
– Limited use of push tools maybe employed to help distributed the grout using long stroke rather than short stroke jabs.
– Air bubbles rising to the surface maybe remove by lightly spraying the bubbles surface with the grout manufacturing solvent cleaner.

– Remove any grout head boxes after the grout has set sufficiently.
– Foundation should be protected by burlap and polyethylene sheet to prevent from contamination.
– Grout form works shall be constructed with adequate strength.
– Concrete foundation should be cured for a minimum of 7 days or 70% of the concrete compressive strength.
– Grout minimum thickness is 25 mm.
– Temperature of grout when placed shall 23ºC ±3.
– Compressive strength should be 35 MPa (5000 psi) minimum at 28 days.
– Compressive strength should be 24.5 MPa (3500 psi) minimum at 7 days.
– When grout water/cement ratio is 0.4 or less the grout shall be given a continuous water cure (cover with wet burlap and 0.15mm polyethylene) for minimum of 7 days.
– Grout shall be tooled/chamfer to a 45º angle down from the bottom of the base plate after placement but before it sets up hard.
– Total dissolved solids in water shall not exceed 500 ppm.
– pH shall be between 6-8.
– Epoxy grout temperature 30 °C to 32°C and no need of soaking.

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