Before mounting the structures of the foundation or preparatory work under the screed, as well as to lay paving slabs, you need to catch a sand pillow in order to drive out of it an extra air volume, as you can squeeze small fractions of the sand. After completing the tamping, the sand base becomes very dense, ready to perform further construction work. To cope with this task, mechanized and manual methods of the rambling of bulk material are used.
What is it for what you need?
When building a house under the foundation or screed, you must perform a rigid layer in the form of a lining from sand or gravel with shallow dispersion. Provide the necessary density to this base allows the method of tamping. For compaction of bulk materials, a specialized technique is used, and if the coating area is small, a manual method of performing work is applied. The sandy dense pillow is necessary before starting construction work for the following reasons:
- For full-fledged leveling and increasing the degree of rigidity of the surface of the base of the future built design;
- To prevent the destruction of the foundation facility under the action of moisture or low temperatures when the soil begins to swell from excess water;
- To prevent the curvature of the design from the action of bending and compressing loads in the processes of soil shrinkage;
- with the aim of elimination of hidden emptiness, filled with air;
- For the construction of an intermediate stable layer, formed between the soil and the foundation design.
The rammed sand creates a dense and durable layer, which is a reliable base for laying asphalt coating, paving slabs, building foundation. Correctly formed sandy layer is not prone to deformation and does not fail if they come on it. Tamble technology implies the performance of these works in multiple passages throughout the surface of the sandy layer.
Upon completion of these actions, quality is estimated not only visually, but also with the help of special devices.
In order to carry out preparatory work for construction, a sandy pillow can be formed by various methods. Their choice directly depends on what kind of tool is in equipping, how large the area of the working surface is, as well as which the requirements for the density level of the sandstone are presented.
Distinguish several methods of work related to sand ram.
- Applied machine on independent move, Which with the help of its wheels trambets sand. Sometimes a trailer special equipment is used, equipped with rollers for the header, with the help of which layer-by-layer tamping in several passages.
- With help Lifting crane Plates are reset, the weight of which is up to 2 tons.
- Sand can be tamped by vibrating – Special mechanical device.
- With the help of a chapeller or a wide bar Sand can be tamped without vibrating plates, that is, manually.
Selection of mechanized methods of tamping a bulk material depends on the convenience for the work of specialized equipment, the availability of driveway for it and the thickness of the sandy substrate required by the project. On large areas, work is performed using autotyagach, and small areas are processed by the rollers of self-propelled type. If the death of the sand is needed on a very small limited space, a manual tamper may well approach this case.
To qualitatively perform the rubbing of sandy bulk material, make several passes with the use of the tool on the same working surface, and the movement of the tamper is performed along a spiral direction – so you can with a guarantee to be sure that the raw sections of the substrate surface will not remain. In the event that after the rambling, the material asked hard, it is possible to add sand to those areas where it is clearly not enough. For more dense scrupping sand particles, it is regularly watered with water, which contributes to the pushing of air between the sands.
Tamping is performed by resetting monolithic heavy slabs if the pillow consists of clay and sand dust fraction. Such substrates contain air in their multiple cavities, which under the weight of monolith goes to the surface. The stove with the help of special equipment rises to a height of 2 meters and is reset to the working surface of the plafhmy. This method allows to work out a clay-sandy mixture to a depth to 1.5-2 meters. Typically, it is resorted to this way when the basis for the foundation of the capital construction is prepared.
Workflow of this type is carried out in continuous mode, but in the fast pace. So continues until the required result is reached.
The manual method of forming a layer of sand is resorted in the case when the area being processed is small, and the thickness of the layer of sand is small. To solve such a task, the tool is made of girlfriend. Take a timber bar, perpendicular to it attach a wide base in the form of a wooden or steel plate. Places of attachment of two parts are securely fixed with a hardware fastener or welding seam. The result of the work should be a robust design for manual labor. It has a lot of weight, but man can lift it and perform frequent sand strikes. So that the work has passed more efficiently and faster, the horizontal plate is specifically dried using additional metal plates or cement fill.
How to rub?
So that the framework of the construction foundation is durable, the sand area should be perfectly even and very dense. This effect is achieved due to the fact that with a qualitatively completed tamping at the substrate, the necessary shrinkage is guaranteed. So it or not, After the end of the work, the result must be checked. The quality of work is monitored by a rope pendulum or level.
To perform correctly and with high quality Tamming sand Vibropilet, the following important nuances should be observed:
- Vibratinglitis will show its effectiveness if the thickness of the sand layer does not exceed an indicator equal to 0.6 m;
- Before starting work Sand layer misses evenly water, But it is necessary to do it evenly and without excesses;
- on the work surface must be performed 5-7 passes in the opposite direction.
As soon as the sand layer is reliably tamped, to continue work, you can pour out the following portion of the sand. But the thickness of this layer should not exceed 0.6 m. The layers are added until the result is a dense sandy pillow of the necessary thickness according to the project documentation.
For the arrangement of garden tracks, before the construction of the garage, before installing the foundation of the country house, the sand pillow is often prepared by hand. Sand rambling can be performed by vibrating or manually. Independent preparation of the surface will cost much cheaper than hired masters will perform.
Consider how hand-made sand is done.
- Get ready or independently make a device for hand-made t-shaped t-shaped – The horizontal plate is made of approximately 30×30 cm in size, and its weight should be at least 15-20 kg. For the convenience of work to the arm of the handles on the sides, 2 knobs are attached – these captures are needed so that the device can be raised at once with two hands. If the design for the tamping turned out to be too light, it is additionally dried with metal or cement.
- With the help of an independently made tool on the working surface of the sand mixture, uniform and multiple blows are applied. Using these blows, it is possible to achieve removal of emptiness and air, and also seal the sand fractions. Raming is performed by a layer behind the layer – when the 1st layer is rammed, the following portion of the sand is added on top.
The process of the death of sand is not so complicated, but a rather responsible stage in construction. The success of all further work depends on the quality of its implementation, so it is necessary to approach it carefully and conscientiously.
The following video shows the trimmer of sand.