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CN-122013626-A - Preparation method of enhanced anti-skid water permeable pavement

CN122013626ACN 122013626 ACN122013626 ACN 122013626ACN-122013626-A

Abstract

The invention discloses a preparation method of an enhanced anti-skid permeable pavement, which comprises the steps of mixing and stirring 200-250 parts of cement, 20-50 parts of fly ash, 300-400 parts of coarse aggregate with the particle size of 5-10 mm, 250-350 parts of machine-made sand, 1-5 parts of water reducer, 0.1-0.2 part of defoamer and 3-8 parts of synthetic fiber uniformly to obtain a permeable base material, paving the permeable base material, paving a permeable surface layer with 100-200 parts of cement, 700-800 parts of fine aggregate with the particle size of 3-5 mm, 100-120 parts of fly ash and 5-10 parts of reinforcing agent, paving the permeable surface layer with a water collecting tank and permeable blind ditches, setting anti-skid texture on the surface of a first layer of finish paint, and spraying a layer of finish paint after the preset texture setting is finished. The invention can obviously enhance the strength, water permeability and skid resistance of the pavement.

Inventors

  • FU DAFANG
  • LI XUAN
  • ZHANG HUIHUI
  • YANG LINGYU

Assignees

  • 南京东瑞韧性城市研究院有限公司

Dates

Publication Date
20260512
Application Date
20260120

Claims (7)

  1. 1. A preparation method of an enhanced anti-skid water permeable pavement is characterized by comprising the following steps: Mixing 200-250 parts of cement, 20-50 parts of fly ash, 300-400 parts of coarse aggregate with the particle size of 5-10 mm, 250-350 parts of machine-made sand, 1-5 parts of water reducer, 0.1-0.2 part of defoamer and 3-8 parts of synthetic fiber, and uniformly stirring to obtain a water-permeable base layer mixture; Step two, paving a permeable base layer, namely cleaning and reinforcing a plain soil layer of a construction area, uniformly paving a mixed material of the permeable base layer on the surface of the plain soil layer, and leveling the surface of the permeable base layer; Preparing a permeable surface layer mixture, namely mixing 100-200 parts of cement, 700-800 parts of fine aggregate with the particle size of 3-5 mm, 100-120 parts of fly ash and 5-10 parts of reinforcing agent, wherein the reinforcing agent is a special powdery additive for permeable concrete; paving a permeable surface layer, and arranging a water collecting tank and a permeable blind ditch in the permeable surface layer, wherein the water collecting tank and the permeable blind ditch extend into a drainage channel on the roadside along the width direction of the pavement; spraying a first layer of finishing paint on the paved permeable surface layer, waiting for a few minutes to uniformly distribute preset textures on the pavement, and realizing the anti-skid function of the pavement; and step six, spraying a second layer of finish paint, namely spraying a layer of finish paint again after the preset texture is shaped for 30-50 minutes.
  2. 2. The method for preparing the enhanced anti-skidding water permeable pavement according to claim 1, wherein the anti-skidding water permeable pavement body comprises a finish paint protective layer, a water permeable surface layer and a water permeable base layer from top to bottom.
  3. 3. The preparation method of the enhanced anti-skid water permeable pavement according to claim 1 is characterized in that in the preparation of the water permeable base layer mixture, the model of cement is P.O52.5, the fineness modulus of machine-made sand is 2.6-3.2, the synthetic fiber is 10-14 mm long polyoxymethylene fiber, the coarse aggregate is basalt or quartz rock crushed stone, and the stirring time in the preparation is 2-5 min.
  4. 4. The method for preparing the enhanced anti-skid permeable pavement according to claim 1, wherein the step two and the step four are characterized in that the paved permeable concrete is vibrated and compacted in the paving process.
  5. 5. The preparation method of the enhanced anti-skid water permeable pavement according to claim 1 is characterized in that in the preparation of the water permeable pavement mixture in the step three, the type of cement is P.O52.5 or P.W52.5, the fine aggregate is basalt or quartz rock crushed stone, and the stirring time is 5-8min.
  6. 6. The method for preparing the enhanced anti-skid water permeable pavement according to claim 1, wherein in the fifth step, the preset texture is in a wave shape or/and a sharp angle shape, and the depth of the texture is 2-3mm.
  7. 7. The method for preparing an enhanced anti-skid water permeable pavement according to claim 6, wherein the wave-shaped or/and sharp-angle-shaped middle is embedded with water permeable particles.

Description

Preparation method of enhanced anti-skid water permeable pavement Technical Field The invention relates to the technical field of permeable pavement manufacturing, in particular to a preparation method of an enhanced anti-skid permeable pavement. Background With the acceleration of the urban process, urban pavement faces a plurality of problems, wherein the insufficient anti-skid and water permeability performance brings great challenges to traffic safety and urban ecology. The traditional road surface is easy to accumulate water in rainy days, so that vehicles slip and pedestrians slip, and the occurrence probability of traffic accidents is increased. Meanwhile, the impermeable pavement can not naturally permeate rainwater, so that urban waterlogging is frequently caused, the underground water level is lowered, and the ecological balance of the city is destroyed. The prior permeable pavement has various defects in application, particularly comprises the following steps of 1, insufficient strength and bearing capacity, and the mechanical strength of the permeable pavement is generally lower than that of the prior pavement material due to the porous structure of the permeable pavement. For example, the compressive strength of pervious concrete is generally C30-C35, and the pervious concrete is difficult to bear long-term rolling of heavy vehicles (such as trucks) and is easy to crack or fall off aggregate. 2. Inadequate material selection, such as, for example, inadequate levels of low strength aggregate or binder or improper construction (such as uneven stirring, inadequate compaction) can further exacerbate the strength problem. In northern areas, freeze-thaw cycles may decrease the intensity by more than 30%. 3. The anti-skid water permeable pavement has no anti-skid function, and the anti-skid water permeable pavement is not an additional function. The existing permeable pavement can only permeate water, but is difficult to prevent from slipping, and surface abrasion, pore blockage and sudden drop of anti-slip performance occur soon after construction. According to the urban infrastructure safety evaluation report of the Ministry of construction 2023, the functional degradation of more than 60% of permeable pavement projects nationwide occurs within 1-2 years of being put into service, wherein the anti-skid failure accounts for up to 43%. The surface compactness is poor due to the fact that low-grade cement and poor-quality aggregate are adopted by most manufacturers for reducing cost, textures are ground down rapidly after rain wash, and the friction coefficient is reduced from the initial 0.7 to below 0.3 (the national standard requirement is more than or equal to 0.5), so that the tile is similar to a wet-slip tile. Along with the upgrading of the "urban slow-going system construction guide" green building evaluation standard ", the" water permeability + anti-skid value + durability "three-in-one index becomes the hardness index of the water permeable pavement. 4. Pore blocking and water permeability attenuation, namely that the pores are easily blocked by sundries such as dust, fallen leaves, greasy dirt and the like, so that the water permeability is reduced or even fails. 5. The environmental adaptability is limited by the influence of climate, easy to cause the swelling or fragmentation of the pavement due to water accumulation and icing in winter in severe cold areas, and the need of adding air entraining agents or timely snow removal, but the freezing and thawing damage can still occur when the drainage of the base layer is poor. Secondly, in special environments, dust or oil smoke in high pollution areas (such as industrial areas) can accelerate pore blockage, and soft soil foundations can cause water accumulation on a base layer and empty road surfaces due to high ground water level, so that additional measures such as drainage blind ditches and the like are needed to be additionally arranged. 6. The construction process has high requirements, and the construction of the permeable pavement is sensitive to the material proportion, the compactness and the maintenance time. For example, if the amount of the adhesive used for the color water-permeable adhesive Dan Lumian is improper or the curing is not in time, the problems of sand formation, insufficient strength and the like are easy to occur. The construction team needs to have professional experience, and quality hidden trouble is buried easily because steps are omitted when the construction period is short. 7. Maintenance costs and lifetime issues-periodic cleaning (e.g., high pressure flushing) and local repair are necessary measures to maintain performance, but maintenance frequency and costs are often neglected. The durability of the partially permeable concrete is poor, the service life of the partially permeable concrete can be shortened in a freeze thawing or corrosion environment, and the service life of the partially permeabl