Regularities of Adhesion Forces Changes on the Surface of Kaolinite Clay Particles Subjected to Compression

Seredin, V. V.; Fedorov, M. B.; Lunegov, I. V.; Medvedeva, N. A.

doi:10.25296/1993-5056-2018-13-3-8-18

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mineral composition of clays manifests itself as energy on the surface of particles, whereas the particle size distribution manifests itself as the active surface area of particles [6]. These are exactly the two complex parameters which determine sorption activity of clays [4,7].…”

Section: Claysmentioning

confidence: 99%

Sorption ability of clays exposed to compression

Medvedeva¹,

Siteva²,

Seredin³

2018

Вестник ПНИПУ. Геология. Нефтегазовое и горное дело

View full text Add to dashboard Cite

Section: Claysmentioning

confidence: 99%

Sorption ability of clays exposed to compression

Medvedeva¹,

Siteva²,

Seredin³

2018

Вестник ПНИПУ. Геология. Нефтегазовое и горное дело

View full text Add to dashboard Cite

The Effect of Stress Pressure on the Formation of Bound Water in Kaolin Clay

et al. 2018

View full text Add to dashboard Cite

Clays during lithogenesis change the composition, structure and properties, including the physicochemical ones. Some researchers present the results of studying changes in the properties of bound water in clays under the influence of increasing temperatures and pressures. When compaction of water-saturated clays, the “free” water of large pores is removed first, then under loads of 1–3 MPa -- osmotic water, and at a pressure of more than 10 MPa, the removal of “structured hydrated layers” of adsorption-bound water begins. According to the literature,several layers of water closest to a solid surface, corresponding to clay moisture close to “maximum hygroscopic” are not pressed by loads of tens of MPa, and “monolayers” of hundreds of MPa. However, despite existing publications on this issue, experimental information is notenough. The work is devoted to the influence of stress pressure on the formation of bound water in kaolin clay. In the course of experimental studies it was found that stress pressure has a multidirectional effect on the gradient of the removed mass of bound water in clays. This isdue to the fact that that when treating kaolin clay with stress pressure, defects are formed on the surface and “inside” of particles (aggregates, colloids and crystallites). Such surface imperfections form the energy potential of the particles, which determines the sorptionactivity of the clays. During the comparison of direct and indirect criteria, it was found that the most significant influence on the formation of the energy potential of particles is exerted by pressure in the range of P = 0 ÷ 125 MPa. With increasing load up to P = 800 MPa, it is quitedifficult to establish the effect of stress pressure on the formation of the energy potential. Thus, under technogenic impact on kaolin clay, its energy potential changes and, as a result, physicochemical properties, including the content of bound water.

show abstract

Regularities of Adhesion Forces Changes on the Surface of Kaolinite Clay Particles Subjected to Compression

Cited by 2 publications

References 0 publications

Sorption ability of clays exposed to compression

Sorption ability of clays exposed to compression

The Effect of Stress Pressure on the Formation of Bound Water in Kaolin Clay

Contact Info

Product

Resources

About