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Study of marl stabilization with organic binders

Journal: Вестник МГСУ / Vestnik MGSU (Vol.15, No. 01)

Publication Date:

Authors : ; ; ;

Page : 58-71

Keywords : marl; stabilization; binder; Portland cement; lime; road embankment; elasticity modulus; strength; granulometric composition;

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Introduction. The paper considers marl used as the primary material for road embankments and multiple-well platforms at some oil fields of the Perm’ Territory. This ground has different strength parameters in dry and water-saturated conditions. Rather high values of the resistance to uniaxial compression in dry conditions abruptly fall when contacting atmospheric or ground water. Being damped and destroyed, marl is capable of transiting into the plastic state with abrupt reduction of strength and growth of deformability. Materials and methods. The optimal binder was selected. Strength tests were performed on samples made based on of various binder contents and hardening periods. The considered strength parameter is the ultimate uniaxial compression strength. A part of the laboratory tests was carried out with artificial marl, which was recreated by granulometric composition to expand the statistical data of the tests. Laboratory studies for non-stabilized marl were conducted to determine the optimal humidity, density of ground particles, yield limit, and plastic limit. The hardening of the samples occurred under different temperature conditions. Results. The study of both stabilized and non-stabilized ground samples is mainly focused on strength indicators, changes in plastic properties, compaction requirements, correlation of strength, and compressibility characteristics of the marl samples. There is a decrease in density and humidity, with an increase in the amount of binder in the sample. Significant improvement and stabilization of the studied samples were observed for 4-% binder content. Conclusions. The study proved many increases in the strength of marl during its stabilization. The optimal type of binder was proposed. Dependences of the strength of ground samples on the binder content were shown

Last modified: 2020-04-24 19:03:08