How to pour the warmed monolithic plate, when the house is already built?

Today I want to share with you so your experience. A couple of years ago came to us an interesting object. The task was not easy and at the same time interesting for its complexity performance! Have you seen this process of building the new house is built around the old? This article is about such a project.

Inside the new built house (house of aerated concrete 365h250h650 mm D400 with facing facade with red brick) was an old farmhouse (frame-panel construction in 1950) with the furnace. old house there are no photos, as they could not fulfill. The walls of the new houses were built at a distance of 500 mm from the walls of the old house.

A task that has been put before us, was: to demolish the old house, dismantle the foundation of the old house, to make filling with sand and gravel, to make installation and concreting of the floor slab first floor.

We have fully performed all demolition work. The foundation of the old house is a monolithic tape around the perimeter of the walls of the old house. lag function performs channel, which relied on retaining bars which in turn are made of silica brick in cement mortar. But this foundation so it was necessary to dismantle.

After dismantling and debris removal from the premises, we began to deliver bulk materials. Cover the geotextile, steel sand fill layer. The total thickness of the sand layer was 300 mm. Further filled gravel fractions 20-40, a total layer thickness of 150 mm. During the bedding of loose materials produced layer by layer seal vibratory plates.

Important: If compaction of sand or gravel is used vibratory tamping machines weighing less than 100 kg, the sand necessary to fill and seal the layers of not more than 200 mm in one layer. Recommendations for gravel fractions 20-40 - 100 mm in one layer. For a good seal.

Good all tamping, lay a layer of polyethylene film 200 technical md. Next have warmed Penoplex - foundations 50 mm thick. The joints are glued sheets of insulation mounting tape. After another lay a layer of polyethylene film 200 krn technical.

After warming process, we moved to the stage floor slab reinforcement of the ground floor. The project was conducted reinforcement rods reinforcement AIII 12 mm, the compounds for binding wire. The cell of the first and second mesh of 200x200 mm. The first grid is raised from the film surface using clips for reinforcement of 50 mm (to provide a protective layer of concrete). The second mesh is raised from a first to a distance of 100 mm with the "frog".

For more information about the process of reinforcement I tell in the article: How and what to knit properly fitting

For concrete slab floor of the first floor has been ordered concrete. The feed solution through the window. Concrete according to design calculations was B20 P3 F100 W8. And in an area of ​​84 m at a layer thickness of 200 mm it took exactly 17 m3 (cubic meters).

To maintain the level of the concrete mass used tensioned thread - beacons and a label made under toes-out (layer thickness) 200 mm.

After a complete discharge made of concrete vibrating the concrete mix and started to level the surface of the rule.

On the third day the concrete is already well grasped, but for the complete curing is required 28 days. The work was done well and in good spirits.

Thank you for reading this article until the end. Here are some more of my articles on a similar topic that may be of interest to you:
How to make a strip foundation for the house?
How to make a formwork for the foundation?
How and what to knit reinforcement correct?