The invention discloses water-permeable concrete and a concrete pavement construction method thereof. The concrete in per cubic meter is prepared from the following raw materials in parts by weight: 280 to 320Kg of cement, 100 to 140Kg of water, 1200 to 1500Kg of coarse aggregate, 2 to 4Kg of concrete mixing materials and 3 to 5Kg of additives. The water-permeable concrete and the concrete pavement construction method provided by the invention are applied to the water-permeable concrete pavement, so that the pavement has the advantages that the water-permeable performance is good; the bearing force is strong; the service life is long, and the like.

Water-permeable concrete and concrete pavement construction method thereof

The invention discloses a water-permeable pavement with a purifying function. The water-permeable pavement comprises a water-permeable concrete surface course, a nonwoven geotextile course, a water-permeable foam concrete base course, a cement-lime stabilized soil base course and an original dirt road base course from top to bottom in sequence, wherein water collecting and draining pipes are arranged in the water-permeable foam concrete base course. According to the water-permeable pavement, a traditional gravel course is replaced by water-permeable foam concrete, nonwoven geotextile is laid between the water-permeable foam concrete base course and the water-permeable concrete surface course, and the nonwoven geotextile not only has favorable water permeability, but also can block solid pollutants in rainwater, maintain the load-carrying property of the overall structure and effectively prevent the development of reflection cracks; the water-permeable foam concrete can filter out fine solid pollutants in rainwater, and the acidic environment in the water-permeable foam concrete can enrich various microbes to purify organic pollutants in rainwater; and the water-permeable foam concrete also has a favorable thermal-insulation property, and can protect the pavement structure at lower temperature and provide a favorable living environment for the microbes.

Water-permeable pavement with purifying function

The invention provides a unidirectional permeable concrete structure composed of a permeable base layer, a unidirectional permeable layer and a permeable filtration layer which are sequentially combined from bottom to top. The permeable filtration layer is made of first permeable concrete doped with a hydrophilic polymer, the aggregate size of the first permeable concrete is smaller than or equal to 0.63 mm, the compressive strength of the permeable filtration layer is larger than 30 Mpa, the hole diameter of a permeable hole is smaller than 0.02 mm, and the permeable coefficient is larger than 1.2 mm/s. The unidirectional permeable layer is made of second permeable concrete doped with a hydrophobic polymer, the aggregate size of the second permeable concrete is smaller than or equal to 1.25 mm, the compressive strength of unidirectional permeable layer is larger than 30 Mpa, the hole diameter of a permeable hole is smaller than 0.05 mm, and the permeable coefficient is larger than 5 mm/s. The permeable base layer is made of third permeable concrete, the aggregate size of the third permeable concrete is 5-15 mm, the compressive strength of the permeable base layer is larger than 40 MPa, the hole diameter of a permeable hole is smaller than 1.0 mm, and the permeable coefficient is larger than 10 mm/s.

Unidirectional permeable concrete structure and preparation method thereof

The invention discloses tailing ecological sponge permeable bricks and a preparation method thereof. Each tailing ecological sponge permeable brick is prepared from a dense permeable layer, a loose permeable layer and a water-retaining permeable layer, wherein the loose permeable layer is located between the dense permeable layer and the water-retaining permeable layer; permeation coefficients of the dense permeable layer, the loose permeable layer and the water-retaining permeable layer are ranked as the following sequence from big to small: the loose permeable layer, the dense permeable layer and the water-retaining permeable layer. The tailing ecological sponge permeable bricks provided by the invention not only have a permeable effect when the rainfall amount is relatively great and can also have water-retaining and moisture-retaining effects when the rainfall amount is relatively small; the tailing ecological sponge permeable bricks are especially suitable for pavement of urban roads with the relatively small rainfall amount.

Tailing ecological sponge permeable bricks and preparation method thereof

The invention discloses a penetrative pavement product, which is prepared from the following components in percentage by weight: 4 to 10 percent of water, 61 to 69 percent of cobblestone gravels, 20 to 28 percent of cement, 2.8 to 3.5 percent of additive, and 1.5 to 2 percent of pore-forming agent, wherein the water cement ratio is 20 percent to 40 percent. The product solves the contradictory problem that the mechanical strength and the water permeability cannot meet the requirement at the same time, and the prepared product has the advantages of high strength, good water permeability, simpleproduction process, easiness in popularization and the like. In addition, the invention also discloses a preparation method of the permeable pavement product.

Penetrative pavement product and preparation method thereof

The invention relates to a sustainable hybrid pervious concrete pavement structure. The pavement structure comprises a surface layer, a middle layer and a bottom layer from top to bottom; the surface layer and the middle layer are paved by use of pervious concrete different in perviousness coefficient, while the bottom layer is a hardcore bed, and the perviousness coefficients and the porosities gradually increase from the surface layer to the bottom layer; the pervious concrete of the surface layer is composed of the following components in kilograms per cubic meter (kg/m ): 300-400kg/m of cement, 1400-1600 kg/m of 5mm-10mm gravel, 2.2-3.25 kg/m of additives and 85-100 kg/m of mixing water; the pervious concrete of the middle layer is composed of the following components in kilometers per cubic meter (kg/m ): 280-380kg/m of cement, 1350-1560 kg/m of 10mm-20mm gravel, 2.0-3.0 kg/m of additives and 75-90 kg/m of mixing water. The sustainable hybrid pervious concrete pavement structure is a machined rolled pervious concrete pavement structure; a pyramid perviousness manner is adopted so that the perviousness of the pavement structure is excellent; water holes are not prone to be covered and blocked by dust, and therefore, the service life of the pervious concrete pavement structure is greatly increased.

Wang Meihua

Papers

Sustainable hybrid pervious concrete pavement structure