METHOD TO ASSESS CONTENT OF MACROFRAGMENTAL INCLUSIONS TO CHARACTERISTICS OF COMPRESSIBILITY OF MIXTURES OF CLAYEY SOILS

摘要

FIELD: construction.;SUBSTANCE: method to assess content of macrofragmental inclusions to characteristics of compressibility of mixtures of clayey soils includes sampling a soil mixture, definition of sample density and moisture, dry unit weight, separation of the sample into fine and coarse fractions, definition of content of fine P_f and coarse P_c fractions, and density of particles of fine $\mathop{\mathrm{image}}$ and coarse $\mathop{\mathrm{image}}$ fractions, dry unit weight of fine and coarse fractions in the mixture, definition of critical content of fine fraction $\mathop{\mathrm{image}}$ when coarse fractions form a stiff skeleton based on the ratio. Additionally the sample of fine fraction is tested in a compression instrument under different pressures σ and its compressibility characteristics are defined - coefficient of porosity e_f for different pressures σ, coefficient of compressibility m_f and deformation module E_f in the range of pressures from σ_i to σ_i+1,using the produced data, they calculate characteristics of compressibility of clayey soil mixtures, and curves are built from the ratios, at the same time the impact of content of macrofragmental inclusions is assessed by coefficients at $\mathop{\mathrm{image}}$ and K_E1, compressibility of the mixture reduces with availability of coarse inclusions in the samples.;EFFECT: provision for determination of impact of macrofragmental inclusions content at characteristics of compressibility of clayey soil mixtures.;2 cl, 3 ex, 3 tbl, 3 dwg