A, concrete pavement paving is completed or the flexible anti-sliding structure begins to be maintained immediately. All kinds of concrete pavements, bridge decks and slabs paved by machinery should be kept in good health by spraying curing agent and covering with moisture. Health care can be carried out in rainy days or when the water is sufficient, and wet health care methods such as covering with moisturizing film, geotextile, sacks, straw bags and straw curtains can also be adopted. , and it is not appropriate to adopt the water enclosure health care method.
Second, the curing time depends on the increase of concrete flexural strength, which should not be less than 80% of the design flexural strength. Pay special attention to the moisturizing (warm) curing for the first 7 days. The general health preserving days should be 14~2 1d, with high temperature days not less than 14d and low temperature days not less than 2 1d. The shortest curing time of concrete pavement mixed with fly ash should not be less than 28 days, and it should be appropriately extended in low temperature days.
Three, the early curing of concrete slab, it is forbidden to people, livestock and vehicles, after reaching 40% of the design strength, can pass. Temporary temporary bridges should be built in grade crossing during pavement maintenance. After the panel reaches the designed bending and tensile strength, traffic will be released.
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