Chemical soil grout gel time
Chemical soil grout gel time
(OP)
Does anyone know the proper method of measuring gel time for chemical grout?
The only thing I can find is
ASTM D 2471 Standard Test Methods for Gel Time and Peak
Exothermic Temperature of Reacting Thermosetting
Resins.
I'm not sure if this is the correct procedure for soil grouting though.
The only thing I can find is
ASTM D 2471 Standard Test Methods for Gel Time and Peak
Exothermic Temperature of Reacting Thermosetting
Resins.
I'm not sure if this is the correct procedure for soil grouting though.





RE: Chemical soil grout gel time
If you are usingsodium silicate with sodium bicarbonate or 600 series reactive agent, I can provide you with the formula. otherwise you will have generally to refer to reactive agent technical documentation.
RE: Chemical soil grout gel time
Working with sodium silicate permeation grouts, the time required to see gellation within the fluid matrix to the time at which the fluid is no longer visible and is replaced by soft gel, is minimal, but a minute or two. In terms of QA/QC and tracking gel times in the field one only hopes that there is consistency in who is determining/recording gel times thus enabling a correlation between gel time and consistency of batching methods.
Asides from grout recipe having an impact on gel times, as BigHarvey mentioned, you may see a very definite trend of gel time and time of day as it relates to ambient temperature. That is if you are working in an area with a significant temperature swing from day to night. I've seen gel times cut in half from cool early morning work to hot mid day operations.