Non-shrink grout alternatives 1

I have made my own grouts, including non-sanded, sanded and 3/8" minus grouts, for small and large base plates: 12" x 12" up to 5' x 5'. Grout thickness from 1" to 6".

Grouts with 3/8" minus aggregates really fall into the category of self consolidating concrete (SCC). But you need access to admixtures, and some good quality control. Batch by weight for solids, and by volume for liquids.

Proprietary non-shrink grouts often are really slightly expansive (aluminum flakes/powder) rather than true non-shrink. They expand a bit, then shrink a bit, with the net result a bit more expansion than shrinkage.

Formulating your own grouts is certainly possible - but usually only justified if the volume is substantial AND you have access to the raw materials.

With your detail - are you trying to get pre-load/pretension into the anchor rod assembly, or is it just a sleeve for rod alignment?

I have never seen the term 'Bolt head to be loosened by waggling the bolts while the concrete is green set'.

I've used cementitious tile grouts before. I used that recently to mount our pool slide. Fairly thin, say 1/4 inch.

I've also mixed sand and cement to make grout. 1:1 - 1:2 or thereabouts.

You can certainly jam in dry pack. Use a rod. Drier = stronger.

Thanks both.

Yes, the sleeve is just to provide some tolerance for fastening the base plate. As is 'waggling the bolt head...'.

There are no admixtures around but there is tile grout ( I thought this would be unsuitable for a 1" thick void but perhaps I should test it.

Any of the Hilti HY grouts would work (200, 70, 150 etc)

Non-Shrink grout is unavailable?! Do you mean that there is no place for you to buy a 50-lb bag of proprietary pre-mixed grout by Dayton Superior, Euclid, Sika, or heck... even Quikrete?

I would always recommend a pre-bagged product for quality control but I do have a "recipe" for an un-sanded non-shrink grout that we sometimes use for micropiles or tieback anchors. But some of the ingredients are not easy to come by so this might not be useful. Also, these are typically batched in a colloidal mixer. Never seen them done in a drum mixer.

1 94lb sack of Type I/II portland cement.
4 gallons of water
6 lbs of Masterroc FLC 100
1 ounce Cortec MCI 2005 NS
0.3 lbs +/- 0.1 lbs of Walocel MW PFV admixture if washout is a concern (which in your case it is not)
Glenium 3030 for added workability

*Add Cortec and Masterroc to mixing water before adding cement.

We typically see between 4500 psi and 5000 psi for this mix.

Now, one thing that I wish I could add to the mix would be pozzolans but they are unavailable where I am. I'm pretty sure that most pre-bagged non-shrink grouts contains some level of pozzolans.

Thanks for your additional comments.
Yes unfortunately there is no non-shrink available at all (I'm in Africa).
I've decided to change the detail. To remove the need to fill the a difficult to access void with a suitable mix, the plan is to cast the anchor bolts in with the slab. Then site measure the anchor positions of the baseplate prior to fabrication. Finally, use a dry pack as suggested for the underside of the base plate. Will do a test run to see if there is any shrinkage. See photo attached.

Yes just dry pack it. Also retighten it later on to eliminate any shrinkage and clamp it tight.