1. The vibrator should be vertical straight up and down, and the operation of the vibrator should be made when the vibrator is inserted quickly and pulled slowly (to eliminate holes), and the insertion point should be evenly distributed (between 300-400) 8-10 times the radius of the vibrating rod. Radius of 1.5 times the number of times! Never do not miss the point inserted (lack of vibration) up and down to pump, keep the vibrator in motion (50-100mm, so that the concrete dense), layer by layer to buckle up, at 150mm is good, combined with good.

2. Time to be between 20-30s is good, so that the concrete does not sink, no bubbles, pulp, the surface is flat, dense quality to the best. Vibration should not touch the formwork. Vibration 0.5 hours, stop for 5 minutes, the hose should not be curled, after 200 hours, the vibrator should be lubricated.