Sentence examples for minimum pozzolanic activity from inspiring English sources

At 28 days, all mortars with additions of calcined silt or silica fume, show evidence of pozzolanic activity (Table 4) more than 100%%, this confirms the strong pozzolanicity of these additions while the ASTM C 618 (ASTM C 618 2000) standard requires a minimum pozzolanic activity index of 75%% at 28 days with Portland cement artificial (Butler 1982).

However, cement producers wishing to substitute pozzolanic-active ash for conventional pozzolans lack information on the pozzolanic activity (PA) of ash from diverse combustible materials.

The term pozzolanic activity covers all reactions occurring among the active constituents of pozzolans, lime, and water.

The thermally activated Hwangtoh clay showed clear pozzolanic activity at 14 and 28 days, and the as-received clay showed some evidence of pozzolanic activity as well.

This ash was a good pozzolan in blended cement, and its pozzolanic activity was improved by adding chemical accelerators (5%Na2SO4and5% 5% CaCl2·2H2O were equally effective).

The results also showed that ODPR had a certain pozzolanic activity which could play the role of active materials.

However, the utilization of FA is usually limited due to its low pozzolanic activity.

This discrepancy between the pozzolanic activity and mechanical tests can be explained by too coarse sludge particles which slow down the pozzolanic reaction.

However, the rate of hydration or pozzolanic activity of MAs in the concrete is slow.

The pozzolanic activity was determined by the modified Chapelle test.

Pozzolanic properties of steel slag and steel sludge were evaluated using pozzolanic activity test specified by ASTM C618.