EFFECTS OF RAMMING ON THE MOULD PROPERTIES OF YOLA NATURAL SAND.
Authors/Creators
- 1. National Metallurgical Development Centre, Jos PMB 2116 Jos Plateau State
- 2. Federal polytechnic Bauchi, Mechanical Engineering Department
- 3. University of Agriculture, Department of Mechanical Engineering PMB 2373 Makurdi Benue State
- 4. University of Abuja, Mechanical Engineering Department.
Description
The paper has investigated the effects of ramming on the mould properties of Yola natural sand. The work considered the variation of the number of rams with green compression strength, dry compression strength, green permeability and bulk density. The results showed that as the number of rams increase, the green compression also increases attaining the highest strength of 186.17kPa as the number of rams reached 6 rams. The dry compression strength also increased with the number of rams. The green permeability however started increasing but dropped after the fourth blow. This drop is normal; after a certain level of compaction is attained the variation of number of rams with green permeability becomes inversely proportional. The number of rams’ variation was directly proportional to the bulk density as the number of rams was increasing, the bulk density too was increasing, until the highest bulk density of 1.78g/cm3 was attained corresponding to 6 rams. The result of the investigation also revealed that the Yola natural sand have a clay content of 26%. The investigation has clearly shown that ramming has effect on the mould properties of Yola natural sand.