Concrete and mortar not only refer to cement concrete and mortar, but also include asphalt concrete and its mortar, but the latter needs to increase the test of heat resistance in the selection of fibers. Fibers of any form and of any material used for purposes other than concrete are not included in this list. The cracking of mortar and cement concrete is due to structural deformation cracking and no-load deformation cracks. Structural deformation cracks are divided into cracks caused by external loads, foundation deformation, roadbed deformation, bridge foundation deformation (differential settlement and differential expansion) Cracks, cracks caused by structural temperature difference; unloaded deformation cracks are divided into shrinkage cracks, plastic cracks, concrete corrosion cracks, steel corrosion cracks in concrete, alkali-aggregate reaction cracks, vibration fatigue and shear cracks caused by inertial vibration.