Method for repairing concrete pavement by using virgin fiber cement-based repairing material

Abstract

The invention relates to a method for repairing a concrete pavement by using a virgin fiber cement-based repairing material. The method comprises: before construction, carrying out a mixing ratio experiment on a cement-based composite material, and carrying out experimental verification to obtain the optimal mixing ratio of the cement-based composite material; carrying out rubblization on an old cement concrete pavement, wherein the whole cement concrete pavement plate is broken into broken blocks at one time by impact equipment, such that the pavement plate is converted from the whole working state to the granule-based combination body working state; after breaking the pavement, compacting to ensure the stability and the flatness of the breaking layer, such that the conversion of the old concrete plate from the old surface layer plate to the new pavement base layer is achieved; preparing a virgin fiber cement-based composite material according to the optimal mixing ratio of the cement-based composite material, pouring, and carrying out vibrating flattening; and after 1 h, covering with a geotextile, and carrying out watering curing. According to the present invention, with the method, the damaged pavement is repaired by using the material, such that the plate breaking and impact fracture phenomenon of the concrete pavement due to the brittleness can be improved so as to avoid the occurrence of wide cracks and improve the durability of the road surface.

Description

technical field [0001] The invention relates to a method for repairing concrete pavements using raw fiber cement-based repair materials. Background technique [0002] Cement concrete pavement is widely used because of its low price and abundant reserves of raw materials, simple preparation process and durability. However, after a certain number of years of service, local diseases such as cracks, holes, potholes, corner fractures, and surface peeling are prone to appear under the coupled effects of environmental erosion and driving loads. If these local diseases are not repaired effectively and in time, the disease will Further aggravation, ultimately affecting driving comfort, safety and service life of the road surface. [0003] The existing cement-based repair materials for cement concrete pavement diseases mainly include the following categories: 1) Ordinary cement concrete repair materials have poor cohesiveness and large shrinkage, resulting in poor durability of the r...

AI Technical Summary

Problems solved by technology

The above two patents have the following three points of difference from this patent: First, compared with the above-mentioned traditional repair materials, the maximum crack width produced after repairing the pavement is reduced, but, because of the presence of gravel, the crack width remains the same. It is at the centimeter level, which is still far greater than the maximum crack width of 50 μm in this patent; second, because the price of cellulose fiber and polyvinyl alcohol fiber is much higher than that of virgin fiber, the cost of this type of patent is higher than this patent; third, this type of The repair material used in the patent still belongs to the category of concrete, and concrete is a brittle material with poor toughness, low tensile strength and bond strength, high elastic modulus and poor deformation ability. It is easy to cause poor interface bonding when it is used for concrete pavement repair. Quality problems such as firmness and cracking lead to re-damage of the coagulation pavement

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