IMPROVEMENT OF DISPERSIVE CLAY EROSION RESISTANCE BY CHEMICAL TREATMENT

Erosion damage caused by dispersive clay soils has created many problems in compacted earth structures and natural cut slopes. Although methods exist for dispersive soil identification, there has been only limited investigation of chemical treatment to improve erosion resistance of these soils. Thus, chemical stabilization of such soils was investigated by using mixtures of hydrated lime, sodium chloride, and aluminum sulfate, which were representative of the calcium, sodium, and aluminum ion groups. This paper describes the effect of chemical treatment on the dispersion potential and erosion resistance of six Oklahoma soils. After a review of literature concerning methods of dispersive clay soil identification and chemical reasctions that occur during treatment, experimental test results are presented and discussed. Test results further support the physical erosion test as an adequate means of correctly evaluating the erosion potential of dispersive clay soils. The use of soil engineering properties to determine dispersive erosion potential was evaluated and found to be unsatisfactory. Flocculation through chemical stabilization was an alternative for reducing or eliminating dispersive clay erosion problems. All three chemical stabilizers provided successful treatment and are ranked in order of decreasing effectiveness.

[1]  D. Smiles,et al.  AN EXAMINATION OF CATION BALANCE AND MOISTURE CHARACTERISTIC METHODS OF DETERMINING THE STABILITY OF SOIL AGGREGATES , 1963 .

[2]  R. K. Schofield,et al.  THE EFFECT OF ELECTROLYTE CONCENTRATION ON SOIL PERMEABILITY , 1955 .

[3]  D. Thorne.  Diagnosis and Improvement of Saline and Alkali Soils , 1954 .

[4]  H. Olphen.  An Introduction to Clay Colloid Chemistry , 1977 .

[5]  T. Haliburton,et al.  Identification and treatment of dispersive clay soils , 1975 .

[6]  Thomas H. Thornburn,et al.  STABILIZATION OF SOILS WITH INORGANIC SALTS AND BASES: A REVIEW OF THE LITERATURE , 1969 .

[7]  R. Mainfort.  STABILIZATION OF BASE COURSE AGGREGATESS WITH ROCK SALT , 1969 .

[8]  W. Emerson,et al.  A Classification of Soil Aggregates Based on Their Coherence in Water , 1967 .

[9]  R. D. Walker,et al.  EFFECT OF LIME, MOISTURE AND COMPACTION ON A CLAY SOIL , 1963 .

[10]  J B Sheeler,et al.  SODIUM CHLORIDE STABILIZED ROADS IN IOWA , 1961 .

[11]  Moreland Herrin,et al.  LIME-SOIL MIXTURES , 1961 .

[12]  D. T. Davidson,et al.  RELATIVE EFFECTS OF CHLORIDES, LIGNOSULFONATES AND MOLASSES ON PROPERTIES OF A SOIL-AGGREGATE MIX , 1961 .

[13]  D. T. Davidson,et al.  USE OF PHOSPHORIC ACID IN SOIL STABILIZATION , 1961 .

[14]  W J Ramsey,et al.  Experimental Lime Stabilization in Nebraska , 1959 .

[15]  K. J. Mysels.  Introduction to Colloid Chemistry , 1959 .

[16]  R. K. Schofield.  EFFECT OF pH ON ELECTRIC CHARGES CARRIED BY CLAY PARTICLES , 1950 .

[17]  Joel E. Fletcher,et al.  Some Properties of Soils Associated with Piping in Southern Arizona1 , 1949 .