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|Title:||The influence of polymers on the engineering properties of cement-stabilized soil|
|Authors:||United States. Assistant Secretary of the Army (R & D)|
Oldham, Jessie C.
|Publisher:||Soils and Pavements Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: The objective of this investigation was to determine if engineering properties of soil-cement could be significantly improved by the addition of a relatively small amount of polymeric material. Polymer science has increased drastically over the last two decades and polymers have become increasingly useful in recent years. Composite materials using polymers have been used in several areas of engineering, and it was believed that positive results could be obtained when they were used in combination with soil-cement. Three soils were used in this investigation: a lean clay classified as CL by the Unified Soil Classification System (USCS), a fat clay classified as CH by the USCS, and a uniform grade sand classified as SP by the USCS. The stabilizers used included type I portland cement and two proprietary polymers. These two polymers were selected after a deliberate screening test involving numerous polymers. Indirect tensile and unconfined compressive tests were conducted on specimens containing 4, 6, and 8 percent portland cement plus 2 percent polymer. Results are presented showing the effects of polymers on tensile strength, compressive strength, density, tensile modulus of elasticity, and compressive modulus of elasticity. Correlations are also presented between tensile and compressive strengths and tensile and compressive moduli of cement-treated soils. Although conclusive results cannot be determined without extensive research using other polymers and other soils, it is concluded that polymers have a tremendous effect on soil-cement, and that further research should be initiated in order that the effects of various polymers on different soil types can be more accurately defined.
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