The Influences of Reinforcing Cement Soil on Soil Humus

Based on the example of soft soil, the authors discussed rules of cement soil functions on soil humus. The results indicated the marked differences in quantities of organic matter in original soil and cement soil, i.e., the ratio of humic acid optical densityE_(465)/E_(665) and FA/HA in unstable form increased in cement soil, while FA/HA in stable form decreased. To hydrate actions of cement soil, it is built the complex of calcium bond and aluminum bond that is soil humus combined with Ca(2+),Al(3+).