Stone powder in quarry will burst, too low stone content will also lead to burst, too little cement consumption or too low label will also lead to burst, if the three aspects are integrated, plus unreasonable maintenance method or maintenance period is less than 100%, it will burst. Solution: 1 Use coarse sand from the river. 2. Reasonable mix proportion: The general mix proportion of cement, river sand and crushed stone should not be less than 1/2/3. 3. Cement grade should not be too low. 4. The roof surface should not be too thin. 5, to have reasonable health and adequate health, many people regard health as a child's play, fishing for three days and drying the net for two days, and the interval between two health treatments is too long, which makes the cement surface white, so the effect after hard water addition is also very small. After the first four aspects are achieved, health preservation is an important condition for the firmness of concrete.