POLYVINYL ALCOHOL AS A STABILIZER OF SURFACE SOILS

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Abstract
Polyvinyl alcohol (PVA) has been shown to be an effective stabilizer of surface soils when the structural organization of the soil is maintained by the soil organic matter. In three out of four soils studied, the acceptance of simulated rain could be doubled by adding 0.005% w/w of PVA to the 0–2 cm of soil in an undistrubed core. The efficiency of stabilization was enhanced by use of the optimal-sized polymer and application to wet soil. The number of residual acetyl groups on the PVA did not affect the rainfall acceptance. When PVA was applied to cores which had recently supported plant growth, the acceptance of rainfall was reduced. Polyvinyl alcohol (PVA) has been shown to be an effective stabilizer of surface soils when the structural organization of the soil is maintained by the soil organic matter. In three out of four soils studied, the acceptance of simulated rain could be doubled by adding 0.005% w/w of PVA to the 0–2 cm of soil in an undistrubed core. The efficiency of stabilization was enhanced by use of the optimal-sized polymer and application to wet soil. The number of residual acetyl groups on the PVA did not affect the rainfall acceptance. When PVA was applied to cores which had recently supported plant growth, the acceptance of rainfall was reduced. © Williams & Wilkins 1973. All Rights Reserved.

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