Effect of different geometric polypropylene fibers on plastic shrinkage cracking of cement mortars

摘要

Three kinds of different geometric (cross-section) polypropylene fibers were used to investigate their effects on plastic shrinkage cracking of cement mortars. The test results showed that polypropylene fiber made in deawing- wire technique with circular cross-section (abbreviated as DW-PP fiber) bad a more pronounced effect on the resis- Tance to plastic shrinkage cracking than the polypropylene Fiber made in a fibrillated film technique with rectangular Cross-section (abbreviated as FF-PP fiber). Polypropylene Fiber with Y-shape cross-section had a little more effective Than that of DW-PP fiber.