Researchers from Perm National Research Polytechnic University have developed new technology. It allows you to use local clay soil to create a foundation cushion instead of expensive imported sand, which significantly reduces costs.
A new technique, patented by scientists, solves the problem of the high cost and logistical complexity of delivering sand to remote areas. The base of the building, or foundation pad, is traditionally created from imported bulk material. Its delivery to hard-to-reach regions can increase the cost of construction significantly.
The innovation lies in the use of local cohesive soil – clay or loam – for the cushion. Such soil is common in many regions of Russia, but was previously considered problematic due to its properties: it is washed away by water, and when freezing may deform the foundation.
To make such soil a reliable foundation, scientists proposed strengthening it with special polymer materials – geosynthetic gratings. The key feature of the technology is the uneven arrangement of these reinforcing layers: more often in the upper part of the cushion, closer to the foundation, and less often in the lower part.
Tests have shown that this reinforced structure can withstand 62% more load compared to conventional compacted soil. At the same time, it is not inferior in strength to a traditional sand cushion.
According to the developers, eliminating the purchase and delivery of sand can reduce the estimated cost of foundation construction by approximately 30%. For large facilities, savings can amount to millions of rubles. An additional advantage is that construction is faster, as there is no need to wait for materials to be delivered.
The technology is ready for implementation and is especially relevant for remote regions, where the logistics cost of traditional materials is extremely high. It allows you to build reliable and durable foundations using locally available resources.
Source: PNIPU
