Effect of Recycled Powder on Properties of Cement Morta

The effects of two types recycled micro-powder (concrete powder and brick powder) replacing part cement on the mechanical properties mortar were studied. results show that contribution concrete to strength is slightly stronger than powder. In a certain range dosage, performance close pure cement. When content less 10 %, compressive flexural will not be greatly affected: over 20% decrease significantly. grinding 5 even increased by 4.5 %. relationship between almost linear limit. more is, obvious decreases. particle size regenerated has influence its activity. After time ball milling, activity can effectively increased, but milling too long, resulting in very fine particles. increases with increase time, effect gradually decreases after 1 h.