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Design of road pavement is connected with estimation of mechanical properties of each of the materials used for construction. This statement presents the need of estimating the mechanical moduli. For the purposes of this article, tests were carried out in order to establish physical and mechanical properties, especially penetrating resistance CBR. The main aim of this paper was to estimate the optimal lime and water content in soil – clayey sand. The paper presents the expected cyclic behavior of clayey sand, as well as method for calculating the resilient modulus (Mr).
Process of chemical stabilization of cohesive soils infl uences its mechanical properties, also in the case of soil cohesion. Road constructions consist of few layers which have various mechanical properties and this creates the need for better understanding the impact of chemical stabilization on soil as a layer of road. For the purposes of this article, tests were carried out in order to establish physical and mechanical properties, especially the penetrating resistance CBR test. The main aim of this paper was to estimate the cohesion of the soil, which was sandy-silty clay stabilized with hydrated lime.
The aim of the paper was studying the resistance during splicing of soil, represented by the horizontal resistance component (Fx), depending on changes of speed and working depth of a work piece in form of a duckfoot share. The study was realized under laboratory conditions in a soil channel which ensured repeatability of results. The tested work piece was a duckfoot share with width of 135 mm installed on a spring tine type VCO with stiffness of 8.3 kNm-1. The tests utilized two working depths for the tool: 0.03 and 0.05 m and two working speeds: 0.84 and 1.67 ms-1. Changes in the horizontal resistance component (Fx) depended on the speed and the working depth. At constant parameters of the soil and the tool, change in working depth from 0.03 to 0.05 m resulted in increase of resistance by 42.6% for the working speed v1 = 0.84 ms-1 and 58.8% for v2 = 1.67 ms-1.
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