Abstract:

The optimum proportion of cement clinker was determined by orthogonal test, displaying as the lime saturated coefficient was 0.92, the silicon rate was 2.5, the aluminum rate was 1.5; the best calcining temperature of cement clinker was 1 350 ℃. According to the above experiment conditions, cement clinker was prepared using industrial material as raw material. The XRD results show that mineral composition of the asprepared cement clinker is similar to the cement clinker in Yatai cement plant of Jilin Province. Oil shale, as the mixing material, is added to cement clinker directly. The relevant experimental results show that with the increasing adding quantity of oil ash, strength decreases significantly in 3 days; but later reinforcing effect is higher. The intensity of 28 days is relatively stable. If cement intensity meets the PC32.5 standards, the maxmium adding quantity of oil ash should be 35% to 40%.

Key words: oil shale ash, cement, portland cement, orthogonal test