Increase the strength of concrete. Two supplements that I used

When pouring the concrete on top of the tape-slab foundation I used special additives to enhance the strength of concrete. But at the beginning of two words for which I poured herself tape:

Because I knew beforehand that a box of their own house of aerated concrete I did not build a single season, it was necessary to resolve the issue of preservation of the lower units, which are in contact with the plate. In rain and melting snow when this layer blocks will saturate with water and during freezing is bad for its strength characteristics. Masonry is not better than the aerated concrete by frost cycles (longer and brick laying). I decided to pour concrete strip height 10 cm. I poured manually samomesnym concrete.

Decking: from the outside - a pie plate permanent formwork. From the inside - board of 25 mm. How to mount and fill - it was told in the channel articles.

To increase the strength of tape, reduce water absorption and frost decided to use a magnifier concrete strength because I heard about them before. These additives trading company, which acquired concrete setting retarder technology for "Washed concrete." This representation of a 10-minute drive away. In stores such additives do not sell.

Acquired a special additive: Polyplast-1MB (25 kg bag) at a price 1500 rubles.

brown powder. It has a specific smell like a medicine.

What is the this supplement:

According to the manufacturer, the concrete increase their strength properties by 30%. Dosage: up to 1-3% on dry concrete volume. I have added about 100 kg mixer (4 buckets CBC + 1 bucket of cement). Concrete thus gained a little brown color, but the curing is white. Quickly grasp, just a few minutes already badly mixed. In general, it insures.

Some write that to increase the strength of the concrete add PVA glue (polyvinyl acetate). And in any case, no glue for paper or wood - only pure polyvinyl acetate! That's why:

I read about the life hacking, but the authors do not write about this subtlety with the adhesive composition. Not the part of the bank contrary to the PVA can slow down concrete setting (starch - it is sugar, they slow down the process of curing). Why is increased strength with the addition of PVA? Most likely, it becomes concrete, polymer. Here theoretical and practical calculations about it:

Those. it turns out that PVA increases the strength characteristics of concrete and cement mixes, reducing their porosity. We must take note.

The second addition, which I used - fluating additive for concrete products surfaces. It is known that the strength of the set, not all concrete components are bonded into a monolithic structure. Some of them remain in the form of calcium salts. They then can be washed out with water, forming a so-called efflorescence. But they can be converted into stable compounds by applying surface treatment technology fluating concrete additives. What it is:

Details of what kind of reaction or chemical process in concrete and some supplement I have used. About this supplement, but a brand, I wrote one of the readers. It is reported that after the treatment of concrete and grinding wear is not a grinding cup "bug." I did not expect such an increase in strength.

I used a supplement that's on the surface after the construction of the fence of the blocks "Washed concrete":

On covers will accumulate snow to melt and the water can penetrate into the concrete. It was necessary to make it as durable and frost-resistant. A hydrophobic property I gave lacquer stone.

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