Testing of Grout
Testing of Grout
(OP)
Hello!
In my country, grout for pile is tested to ensure compliance with the following criteria:
1. 28 day Compressive Strength
2. Flow Cone Efflux Time > 15s
3. Free Expansion < 10% in total
4. Bleeding < 2% in first 3 hours; < 4% in total and 24 hour reaborption
I understood that the control on bleeding is important to avoid excessive upflow of water leading to void, and 28 days strength is important for loading transfer.
However, what are the purpose/intention for limiting the free expansion and flow cone efflux time of gorut?
Can anyone explain?
In my country, grout for pile is tested to ensure compliance with the following criteria:
1. 28 day Compressive Strength
2. Flow Cone Efflux Time > 15s
3. Free Expansion < 10% in total
4. Bleeding < 2% in first 3 hours; < 4% in total and 24 hour reaborption
I understood that the control on bleeding is important to avoid excessive upflow of water leading to void, and 28 days strength is important for loading transfer.
However, what are the purpose/intention for limiting the free expansion and flow cone efflux time of gorut?
Can anyone explain?





RE: Testing of Grout
In case of construction of socketed steel h-piles surround by grout, what should we do if:
1. The bleeding test fail?
2. The free expansion test fail?
RE: Testing of Grout
Flow cone efflux time is a quick and easy way to field-check the proportions of the grout mix. When compared to the flow time for a properly mixed grout, a different flow time reading in the field will indicate that the mix is too stiff or too loose, indicating incorrect ingredient proportions of water or cement. Research Mud Balance. https://en.wikipedia.org/wiki/Mud_balance
www.PeirceEngineering.com
RE: Testing of Grout
www.PeirceEngineering.com
RE: Testing of Grout
RE: Testing of Grout
www.PeirceEngineering.com
RE: Testing of Grout
Non-shrink grout was used for my project. The grout was mixed with water, cement and admixture (Cebex 100).
The grout has never failed in an expansion test, while I would want to know the purpose of having such a limit on the free expansion % in the Contract.
Also, what is the point for limiting the grout fluidity (flow coen time > 15s)?
RE: Testing of Grout
The pile is a bored pile with a 610mm permanent steel casing, inserted with H piles and the grout is only used to fill the void between the pile shaft and the steel H pile.
RE: Testing of Grout
so limiting the expansion will limit the amount of gas produced, reducing the voids and producing a more dense material. A large expansion should not be required.