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| Titel: |
Investigation of the effectiveness and mechanisms of enzyme products for subgrade stabilization |
| Auteur: |
Velasquez, R. A. Marasteanu, M. O. Hozalski, R. M. |
| Verschenen in: |
International journal of pavement engineering |
| Paginering: | Jaargang 7 (2006) nr. 3 pagina's 213-220 |
| Jaar: |
2006-09 |
| Inhoud: |
The subgrade stabilization effectiveness and mechanisms of two enzyme products (enzyme A and B) were investigated using chemical analysis and resilient modulus testing. Two types of soil were tested in this study. A soil with a high percentage of fines (96.4% passing 200 sieve) and high clay content (75.2%) (Soil I) and a soil with a relatively low fines content (59.7% passing 200 sieve) and low clay content (14.5%) (Soil II). The addition of enzyme A did not improve significantly the resilient modulus of Soil I, but increased the resilient modulus of Soil II by an average of 54%. On the other hand, the addition of enzyme B significantly increased the resilient modulus of both soils. The soil clay content and percent of fines appear to play an important role in the effectiveness of enzyme-based stabilizer treatment. The limited effectiveness of enzyme A (for low clay content soil) appears to be due to its surfactant-like characteristics while enzyme B, which was effective for both soils, exhibited no surfactant-like characteristics. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 30 van 46 gevonden artikelen
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