LABORATORY EVALUATION OF FROST HEAVE CHARACTERIS TICS OF A SLAG - FLY ASH - LIME BASE-COURSE MIXTURE
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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Sixteen specimens of a slag-fly ash-lime base course mixture were tested for frost susceptibility in the laboratory. The mixture consisted of 66 slag, 30 fly ash and 4 lime, by weight. Test results showed that oven-cured specimens heaved insignificantly even after 10 cycles of slow freezing in an open-system test, while non cured specimens heaved about 15 during a single freezing and were classified to be of low frost susceptibility. INACCORDANCE WITH ADOPTED CRITERIA, BASED ON AVERAGE RATE OF HEAVE IN MMDAY, MOST MOIST-CURED AND SOAKED SPECIMENS WERE CLASSIFIED AS NEGLIGIBLE FROST-SUSCEPTIBLE ALTHOUGH A FEW APPROACHED OR WERE CLASSIFIED AS VERY LOW FROST-SUSCEPTIBLE. Specimens cured only in moist sand performed significantly better on the whole than those first submerged in water and then moist-cured. On moist-cured only specimens, heaving decreased with increase in curing time. The maximum measured heave of any of the cured specimens, soaked or otherwise, during any one freezing cycle was about 0.2 in. and about 3.3.
- Civil Engineering
- Soil Mechanics
- Snow, Ice and Permafrost