Analysis on the corner cracks on cast-in-place concrete floor and repairing measures;

Based on a study and analysis of the effect of linear shaped charge, the paper sets forth the new method and the mechanism on presplitting cutting slots by linear shaped charge, pointing out the potential prospects of its development.

Analysis of 45° bevel crack in cast-in-place reinforced concrete floor of the residence;

Analysis and treatment of angle cracks on floor slab of high-rise building;

The article mainly introduces the causes and the prevention measures to pumping concrete floor exterior angle cracks, which is positively and practically significant to direct the construction and to avoid the pumping concrete floor exte- rior angle cracks.