Accession Number:

AD0884487

Title:

Factors Influencing the Lime Reactivity of Tropically and Subtropically Weathered Soils.

Descriptive Note:

Technical rept. Jan 70-Jan 71,

Corporate Author:

ILLINOIS UNIV URBANA

Personal Author(s):

Report Date:

1971-05-01

Pagination or Media Count:

195.0

Abstract:

Research to determine factors that significantly influence lime-pozzolanic reactions in soils has been fairly well restricted to soils of temperate regions. Extrapolation of this data to tropical soils was not justified without additional investigation. Phase I of the study, a literature survey, identified typical tropical soil characteristics, and summarized factors known to influence lime-pozzolanic reactions. Selection and sampling of soils for the sample suite, Phase II, was so accomplished to provide representative cross-sections of soil characteristics. Phase III, laboratory investigations, included determination of physical, chemical, and mineralogical properties of the 26 soils by standard techniques. Development of lime-pozzolanic reactions was measured by maximum increases in the unconfined compressive strength of the lime-treated soils after various curing periods. Due to restrictions on quantities of soil available for testing, some experimental similitude was required. In Phase IV, analysis and discussion, it was determined that organic carbon, soil pH, CEC, base saturation, Silica Sesquioxide and Silica-Alumina Ratios, pedologic order, and air-drying influence development of lime-pozzolanic reactions in Ultisols and Oxisols. Author

Subject Categories:

  • Soil Mechanics
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE