Foundation of FBS blocks

I’ll make a reservation right away - this is my personal opinion from the experience of building my own house with a foundation of reinforced concrete blocks and several other similar houses on our street. The main disadvantage is that over time, each block settles on its own, the foundation with waterproofing cracks and water appears in the basements. This is a mass phenomenon, although the construction was carried out efficiently and was not saved on it. The monolithic foundation has no such drawback.

storting speed

price, foundation integrity is weak due to individual subsidence of blocks, the appearance of water in the basement

As the masters explained to me, in the process of building the foundation of FBS blocks, the device of the reinforced belt can not be performed, but for walls that consist of foam and aerated concrete, expanded clay concrete like mine or other large blocks, this is similar to death. Not in the sense that it will fall apart, but in the fact that there will be permanent cracks from shrinkage, especially in the first years of operation. To prevent them, they arrange armored belts. The reinforcing cage consists of bars of the D12 brand, while the spatial lattice of the reinforcing cage can be either rectangular or triangular, which will significantly reduce the metal consumption and will give additional savings in labor costs, but at the same time, the strength of the reinforcing belt will be within the permissible norm.

The ability to flood in the winter,
using fittings as a heater

High cost of materials
Significant labor input

Having learned how much it costs to rent a car and a crane, without which there is no place to go, I decided to calculate everything in advance, including the location of the blocks with mutual dressing in each row. In the first row were blocks 40 cm wide, acting as a kind of pillow for the foundation. In the second and third 30 cm wide. In length a greater variety. In order to qualitatively bandage the order, 60 blocks 2.4 m long, 8 blocks 1.2 m long and 10 blocks 90 cm long were required. And all this was placed on 60 linear meters

Given that the house was built in a lowland, waterproofing was given special importance. For the external and internal walls, 4 20 L cans of waterproofing mastic Technonikol were purchased. The outer wall was spread in two rows, the inner one in 1 row. I also wanted to put a roofing material, but the master dissuaded, said that it was excessive money and time.

Mounts pretty fast
High accuracy of placement of blocks and, as a result, evenness of walls

High price
High complexity of all processes

Almost, because you don’t pull such blocks yourself, but at each stage I took an active part. The installation took place from September 1 to October 15 and turned out to be more expensive than I expected, mainly due to the high rental of construction equipment. An hour of truck operation cost 20 y. e., and the crane’s hour is 30. e. In total, 5 walkers were made in a day, and renting only those of one equipment cost me 400 dollars. e.
The foundation itself occupied 3 rows and was laid not on concrete pillows, but on a pillow of rammed gravel. In addition, on the advice of knowledgeable people, roll-on waterproofing bikrost was laid out under the first row. The next day, at the same concrete goods plant where I bought the blocks, I ordered 2 cubic meters of a solution of brand m 100 (I’ll say right away 0.5 cubes left and had to be thrown out). Installation of the two remaining rows of blocks is done by professional installers and a crane operator with my help. Managed for 7 hours and took 150 cu for installation and 150 cu for the crane, which I think is not expensive, since I myself would not have put these blocks in such a way.

The result is a roomy semi-basement
Reliable grounds for a two-story brick house.

The high cost of material and work
High cost of equipment rental
High labor costs