Practical experience for application of cement built-based soils for road construction buildings
Abstract
In the context of political changes in the country and the transition of power to territorial communities, the issue of supporting local infrastructure is addressed by the relevant local authorities. The transport and road network will continue to play an important role in the political and economic life of local associations. Reducing the cost of constructing and rehabilitating roads of local importance through the use of local materials without reducing the regulatory period of operation remains a topical issue.
The aim of the research was to determine the physical and mechanical properties necessary for the use of cement-supported soil for the construction of road layers, cycle tracks and pedestrian paths, and to verify the results obtained by sampling on a test site in real operating conditions.
The main indicator for finding the qualitative characteristics of the soil mixture with reinforced cement is the compressive strength limit. The soil mixtures of reinforced 14% cement and different concentrations of Master Fix (0.5%, 1%, 3% and 5% of the weight of cement) were proposed and investigated, the amount of water was constant and was 10% of the mass of dry cement mortar.
The compressive strength increases with an increase in the Master Fix additive concentration of 5% by weight of cement, however, the greatest increase in compression strength is imposed in the range of 0% to 1%.
The best values of the tensile strength at bend and elastic modulus were the concentration of the Master Fix additive of 5% of the weight of the cement, but a significant increase in the values could be noted adding even a 1% increase in the growth of the modulus of elasticity from 360 MPa to 456 MPa.
Thus, and in this case, the research has established that the positive effect of increasing the concentration of the supplement Master Fix - the coefficient of frost resistance increases.
After a series of experiments with various chemical additives, it was decided to use Master Fix supplements in the preparation of cement-based mixtures for the purpose of road-dressing, cycle tracks and pedestrian paths. In October 2018, a pilot site was constructed on the basis of the residential complex "CARAMEL RESIDENCE", which is being erected by "LDBC" ltd. in Lutsk. The total volume of compacted cement plant and cement plant with the addition of Master Fix is 15.75 m3 or 33.075 tons.
As a result of the introduction of the Master Fix additive with an index of 1% of the weight of cement in a cement-based mixture, it leads to an increase of M 20 to the mark M 40, which positively affects the durability of the construction.
