The appliance of prefabricated soil-cement slabs processed with a hydrophobizing material for the road construction

Abstract

The paper presents a complex method for increasing water resistance and reducing crack formation by using a prefabricated foundation of soil-cement slabs with surface processing with a hydrophobizing material on basis of organosilicon compounds. Theoretical, laboratory and full-scale experimental studies were made. Theoretical studies are based on the substantiation of the geometric parameters of the slab in order to exclude the probability of its destruction under its own weight during building and installation works. The result of the first stage of laboratory studies is the determination of the optimum composition of soil-cement mixture in order to achieve a grade of strength M20. At the second stage, the effectiveness of the influence of hydrophobizing materials "Tiprom U" and "Penetron-Admix" on water absorption and compressive strength of soil-cement was determined. The final stage of the research was a full-scale experiment. In the factory environment, soil-cement slabs were manufactured in metal forms. Based on the results of the research, conclusions about the effectiveness of this complex method were made. The use of soil-cement slabs allows reducing crack formation, as well as to work all year round due to manufacturing and surface treatment of slabs in the factory conditions.

Analysis of the Effectiveness of the New Generation of Additives in Improving Physical and Mechanical Properties of Highway Subgrades

“…In addition, there are a number of features when working with stabilized soil, which significantly affect the physical and mechanical characteristics of the earth bed's working layer. Reinforcing or stabilization of soils by application of various additives (stabilizers) in combination with cement is the most radical and effective way to save material resources, increase labor productivity, drastically reduce the volume of traffic of road building materials [7][8][9][10][11][12][13].…”

“…Since in Russia, for the most part, wet soils with clay particles are predominantly found, this technology will undoubtedly help reduce the cost of building a road base, improving their physicalmechanical properties, by increasing the elastic modulus, eliminating soil decompression, increasing its hydrophobic properties and frost resistance [13][14][15][16][17][18][19].…”