The contents
The choice of method of laying the Foundation for various buildings: house, garage or bath. The most important parameter is its durability, which allows to ensure the preservation of the building for many years. One of the most popular options is a rubble concrete strip Foundation.
He has a number of attractive performance characteristics:
- increased strength;
- the low price of the materials used;
- the minimum requirements for the process of laying.
Rubble concrete Foundation with your hands can be done without any obstacles, since technology is not much different from the flooded of the concrete, inclined in contrast to fracture under the influence of movements of the soil. This species is distributed in the construction of garages, baths and other single-storey buildings.
The scope ↑
Despite the fact that the device rubble concrete Foundation practically does not differ from the concrete option, there are restrictions on its use. So, it is widely used in the construction of low-rise buildings in the conditions of the soil, not prone to subsidence and slumping. Therefore, prior to construction, verify the conditions (enough to make the analysis of soil).
Heaving or subsiding soils should be mounted rubble concrete Foundation with reinforcement providing the stiffness, and durability. In difficult conditions choose rubble concrete pier Foundation that allows you to raise the building above the water level and to protect it from certain climate features (periodic flooding, etc.).
Preferably, the extraction site of this stone was in the immediate vicinity of the construction. The only way to ensure reasonable cost of works on laying foundations. At the same time, should follow the rules that they are held only in the warm season. The stone tends to pick up heat from the solution, which greatly affects the structural strength, have not yet had time to harden. Externally, rubble concrete Foundation, judging by the photos, no different from a concrete option.
What material should I use? ↑
To rubble concrete Foundation purchased the claimed properties must be filled with concrete mortar rubble stone in a certain proportion. Choose the stone middle fraction from 20 to 30 cm Can be found and guidelines for using formulas involving a certain ratio of the size of the stone and the total width of the trench, but stick to it do not have.
When laying rubble concrete Foundation, the technology involves cleaning the stone of any dirt, dust. Before laying booth moistened with water, it greatly improves their grip with a concrete solution. You can verify its strength with the help of tapping with a hammer – the sound should be clean and clear.
Lots of discussion occurs in regards to whether or not to do rebar to rubble concrete Foundation. It is believed that it is enough durable and no reinforcement exercise is not necessary. Even in cases where the material to be used is gravel, cobblestones, brick battle and other medium-sized stones. While rubble concrete strip Foundation of brick battle operation is not different from that made from the booth.
How to prepare the mixture? ↑
For mixing the concrete mix used cement increased strength, brand 400 to 500, the average sand fraction used in relation to the cement in standard proportions – one to three. Sometimes add small gravel (fraction up to 30 mm) to further increase the structural strength. All components shall be thoroughly mixed until a homogeneous mass.
Water when mixing add gradually, until the consistency, capable of filling in the trench to penetrate easily between butovymi stones. But in the case of manual leveling shovel or bar. If to seal the mixture using a plate compactor, it can be hard enough not to flow under the influence, keep the form until the completion of the ramming.
Installation Foundation designs ↑
If to put aside questions like: why not reinforce the Foundation of rubble concrete or rubble concrete how to reinforce the Foundation under the oven, can truthfully say that technology bookmarks are similar to conventional concrete strip foundations, and the solution used is exactly the same.
Pre-prepared location is leveled, cleared of debris or remnants of old buildings. Is the markup using a set of pegs and placed in the formwork. Before this is taken out the soil to a depth of 0.5 meters. While digging the trench, consider that it has to be 8-10 cm wider than the base of the wall that is the same, but from pure concrete.
Before laying the stone, the bottom of the trench is covered with a cushion of sand-gravel mixture (instead of gravel can be fine gravel), which is closely aligned, tamp it with improvised means or a special vibrating device. If the selected reinforced rubble concrete Foundation is formed by a reinforcing frame before laying the stones. To reduce the impact of moisture solution in a trench, you can lay waterproofing.
Then pour the concrete layer up to 25 cm, where already beginning to lay the booth or other material (scrap brick, etc.). Between the stones should be a distance of not less than 5 cm, so that the solution flowed freely down. The top layer of concrete needs to close the stones are not less than 5 cm, they in no case should not touch the base of the wall. Before pouring the bulk of solution, the bottom layer allow to grab, to rubble is not squeezed out of the trench and not moved.
After complete filling is necessary to sustain up to 7 days for complete solidification, and should ensure regular moisturizing of the surface to avoid cracks on the top of the Foundation, impairs its performance.
The details of how lay rubble concrete Foundation in the video you can see along with the reviews of experienced professionals, for example:
Advice of experienced craftsmen allow us to eliminate errors, which often occur in self-construction work.
