Limited protective functions of the blind area assume a standard approach to its device in compliance with the technology, which is considered classical. The asphalt concrete pavement, which has worked its life cycle for several decades, is a thing of the past.
Content
Today for pavement blind area safely use hard-coated and soft materials. A choice for the builder. The only thing that remains unchanged is the need to erect a blind area.
Need to create a blind area
There is no doubt that the device around the blind area is not only an element of improvement. The task of the blind area is to delay water and drain it into the storm sewage system.
If you doubt whether a blind area around the house is needed, then the practical arguments of experts on water removal from the basement and its insulation are convincing.
For this reason, a continuous ditch for a shallow foundation is considered mandatory. Waterproof coating should be combined according to the general style of design and materials of paved driveways, sidewalks and paths. At the device it is necessary to take into account the parameters of the blind area.
we select the parameters of the blind area
The parameters of the correct blind area around the house are:
• its width and slope
• cap height
• type of lining material.
According to existing norms and rules, min. width of blind area around the house is 0,8 m., max. depends on the builder. The present probability of damage to the socle part increases with the range of absorption of moisture.
Of course, the slope should ensure free flow of water in the opposite direction from the foundation belt and the socle. On an even surface, an inclination angle of 15 mm is sufficient for 1 m, which is 2% of the width of the blind zone. The recommended angle of inclination is provided by a vertical lay-out when laying a coating and tamping the soil into a trench. In addition, the width of the projected blind should not be less than the width of the roof projection.
Between the wall of the house and the blind area, a technological gap (compensating seam of 2 cm) is satisfied, followed by filling it with sand.
Depending on the type of blind area - with a hard surface or "soft", for paving use tile materials with a rough surface.
Among the main parameters of the blind area does not prevent you from saying a word about the recommended waterproofing blind area around the house. Demanded materials for horizontal plastering consider geotextiles roll and polymer compositions, plate waterproofing insulation.
Schemes of the device of the house blind area
Schemes for creating and device blind area around the house of paving slabs and pavers are classic. The enlarged scheme consists of the underlying and covering layers, for which fine-grained gravel and sand are used, with the creation of an underlayer up to 20 cm.
The coating layer is recruited from coarse gravel, concrete solutions and the asphalt mixture is rarely used.
Technologically distinguish such blind areas:
• simple bulk and bulk with waterproofing
• from prefabricated slabs, pavers or tiles
• poured concrete.
Technologically, the device around the house blind area is identical to the power of tiled walkways or tracks.
bulk crushed stone
Bulk stone crushed stone is the easiest method recommended for high groundwater. For the device, crushed granules from 8 to 32 mm are traditionally used, laid on the ground along the perimeter with a ramming and geotextile placement. The subsequent backfilling of the rubble with a layer of 10 cm is performed without a sandy underfill.
concrete
Doing asphalt concrete pavement is not practiced, as it does not justify the final result. A more practical solution is to look around the house from concrete.
The device of a concrete blind area around the house step by step
Layout of the field
Step 1. Mark the field under the blind.
Step 2. Excavation at a depth of 25 cm.
Organization and creation of an underlayer
Step 3. Filling of sand with a layer thickness of up to 12 cm.
Step 4. We sand the sand layers with hand tamper, especially in the places of formation of the sinuses near the basement.
Step 5. Moistening with water of sand.
Step 6. Covering and spreading a layer of crushed stone 6 cm thick.
Placement of the drainage system
Step 7. Install drainage system on a slope.
Installation and erection of formwork
Step 8. We set up the formwork, considering the continuity of delivery of freshly prepared concrete mortar.
Waterproofing and insulation
Step 9. We produce horizontal waterproofing, spreading geotextiles, vertical mastic application or installation of penoplex plates.
Surface reinforcement
Step 10. We make the reinforcement of the surface layer by a fine-mesh steel mesh.
Laying of gaskets for creation of expansion joints
Step 11. In the corners and walls we place gaskets in the form of racks or vinyl tapes.
Step 12. Across the formwork at a distance of 2-3 m, we install rails impregnated with bituminous mastic to create a deformation seam.
Fill with concrete
Step 13. On the spot we prepare the concrete mortar in the traditional way.
Step 14. We distribute the solution into the formwork part by beacons (installed wooden slats).
Step 15. We produce compacting and ironing of concrete. We carry out ironing in a wet way.
Step 16. Cover the fresh concrete surface with a damp cloth moistened with water.
After maturing of the concrete filling (7 days) we produce decorative finishing.
The self-made device of the concrete area is shown in the video.
In addition to the hand-held device blind area around the house, we will show that the practical solution of the coating is the paving slab.
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