Make WU concrete yourself in small quantities

Hello,

I am currently working on creating new exterior walls in my basement, following the principle of sectional underpinning. At the moment, I am making the formwork, and as soon as the weather permits, I want to start concreting. The problem is that due to the sectional concreting, I only need small amounts of waterproof concrete per section, so delivery is not an option for logistical and cost reasons. Now I have looked around a bit and found the following products that might be suitable for my project.

I want to mix with my forced-action mixer and then consolidate with the vibrating poker.

As a base, I thought of:
Baumit dry concrete 25 kg 8mm C 25/30 (DIN EN 206-1)

and as additives, I found the following:

1. Ceresit_CC_93_liquid_DM

2. PCI sealing agent liquid mortar additive, dark brown, 5 L

3. Ravenit DM-F concrete sealing agent (apparently only available in Austria? why?)

My question now is:

Is it even possible to produce waterproof concrete like this?
Does anyone know these agents?
How do they differ?
Any recommendations?

I would appreciate any help!

Best regards
Hannes

Unfortunately, I don’t know, but a few possible solutions maybe:

Where did you get the individual materials from? Made up yourself, from a professional, researched online? That could help understand how sensible what you have written is.

Have you asked the building materials dealer how to produce it yourself?

Isn’t WU concrete also always a matter of the steel used? The more steel, the firmer, denser and less permeable the concrete becomes.

I understand your project as you want to pour a second wall in front of the existing basement wall. Correct?

You are doing everything in sections, wouldn’t it be better to do it all in one pour so that you don’t cause connection joints/cracks in the individual parts? After all, your project always results in a different (even if minimal) consistency of the mixture, different ambient temperature and moisture with the individual sections placed next to each other.

That’s where I would have concerns.

Even if you managed to produce the concrete correctly, every joint is like a hole. That's not how it works, better build a black tank.

Have delivered or brick up.

With Wu concrete, you have to make sure that you stay below a water/cement ratio of 0.55, which is usually only achievable by adding a plasticizer. (e.g. PCE plasticizer from Sika) The easiest way is to pick up a small amount of Wu concrete from a ready-mix concrete plant with a trailer and ask the plant operator to tell you how much water he deducted per cubic meter and then mix it on site.

WU concrete is above all not just a material, but always a complete system. Every construction joint, for example, must be executed with internal joint sealing tapes and appropriate joint preparation. This is always a challenge even for professionals to achieve a truly watertight result. The same applies to the connection of the wall to the footing, where a joint tape must also be used. Without a bituminous coating, you will not achieve watertightness.