LU502983B1 - A paving made from recycled aggregates for easy drainage and its laying method - Google Patents

Abstract

The present invention provides a recycled aggregate paving for easy drainage and its laying method, and relates to the technical field of building materials. A pavement made from recycled aggregate for easy drainage and its laying method, the pavement comprising from top to bottom a road surface layer, a permeable layer, a solid structural layer, an upper base layer and a lower base layer, the road surface layer being provided at its lower end with a permeable layer, the permeable layer being provided with a solid structural layer at its lower end, the solid structural layer being provided with a top support layer at its bottom end, the top support layer being provided with a bottom support layer at its bottom end, wherein the permeable layer is made from recycled aggregates and a modified asphalt. By using recycled aggregate and modified asphalt as the permeable layer, surface water above the road surface during rain or drainage can flow through the pavement layer - permeable layer - upper base layer - lower base layer and finally reach the ground, thereby increasing the drainage capacity of the pavement and reduced the load on city drainage systems.

Description

A paving made from recycled aggregates for easy drainage and its installation method

Technical part

The present invention relates to the technical field of building materials, in particular one

Paving made from recycled aggregates for easy drainage and be

laying procedure.

technology in the background

With the rapid development of Chinese economic development, the

Transportation industry, the main artery of the national economy, is developing rapidly, and the currently used methods for planning road surfaces can be basically divided into two

Classify categories: Fine Art is the empirical method, that is, according to the pavement design and construction and other relevant specifications, reference and absorption of successful experience at home and abroad and the latest research, under

Taking into account the local natural environment, traffic conditions, material characteristics and the supply, construction technology, maintenance and operation and other factors, so that to propose a reasonable structure sidewalk, the other way is to use the theoretical analysis and calculation of the structure sidewalk type analysis , for the combined

Dimensioning of covering structures with —recycled layers = dimensioning specifications,

Axle load conversions, design specification tolerances, material design parameters and thus the corresponding covering structure are examined, at this stage, the recycling of

Road surface materials has been one of the most important points of energy saving and

Emission reduction work in the highway transportation industry, and is also an important one

Element in changing the development mode of highway transport.

Recycled aggregates are cementitious, sintered and natural

Aggregates found in construction waste that are recycled, processed and refined to produce recycled products known as new concrete and its products, new

Wall materials, road substructure or substructure can be used.

With the rapid urbanization in China, the large-scale solidification of urban

Building land and the continuous expansion of transport routes is the original function of the

Surface seepage almost lost. When precipitation falls on the ground, surface water cannot flow into the ground through the original surface infiltration

Groundwater can be derived, but only through the existing underground

Drainage pipes, which increases the load on drainage systems and at the same time a

caused a number of problems such as B. the lowering of the groundwater, therefore proposes

Techniker presents a paving made from recycled aggregates for easy drainage and its laying method.

content of the invention

In response to the shortcomings of the prior art, the present

Invention provides a paving surfacing made from recycled aggregates for easy drainage and its laying method that solves the problem of surface water on the

Paving cannot be reduced by seepage to groundwater.

In order to achieve the above purpose, the present invention is realized by the following technical solution: A paving surfacing made of recycled aggregates for easy drainage and its laying method, wherein the surfacing has from top to bottom a

Road surface layer, a permeable layer, a solid structural layer, an obek&}502983

A base layer and a lower base layer, the road surface layer being provided at its lower end with a permeable layer, the permeable layer being provided at its lower end with a solid structural layer, the solid structural layer being provided at its lower end with an upper base layer , wherein the upper supporting layer is provided with a lower supporting layer at its lower end.

Preferably, the material of the road surface layer consists of blast furnace slag

Grade 42.5, permeable layer material made from recycled aggregate and modified asphalt, solid structural layer material made from recycled

structural steel is made, the material of the upper base layer is made of cement and gravel granules and the material of the lower base layer is made of cement and crushed stone.

Preferably, the permeable layer uses a modified asphalt with a

Porosity of 25-28% SBS modified asphalt, the solid structural layer forms a solid structural framework with a reinforcement density of more than 18%, the upper base course and lower base course both use cement of 425 hydrochloric acid cement.

Preferably, a method of laying an easily drainable recycled aggregate paving comprising the steps of laying:

S1: Construction of the road substructure

Placing of central poles in the entire stretch of road to be built, good control of the

Stakes at the beginning, middle and end of the curved section of road, good ones

cipher posts in the middle of the curve and good construction signs around the road;

S2: Construction of the road substructure

Before the road substructure is excavated, humus, weeds, rubbish and

Building foundations are removed within the road bed, then the road bed is excavated according to the design requirements, and after the excavation, the

Road bed compacted and leveled by repeated rolling with a roller;

S3: Laying the subfloor

The edges of the compacted and leveled roadbed are provided with the appropriate fencing, then the lower base is laid, after which the lower base is evenly spread over the roadbed with a grader, and after the lower base is leveled on the roadbed, the upper base is laid laid and leveled in the same way;

S4: Laying of the fixed structure

If the moisture content of the top base course and the bottom base course, which are in

Step S3 is less than 60%, lay the fixed structural layer on the top sub-base and run the fixed end of the reinforcement structure on the fixed

structural layer into the upper sub-base, completing the laying of the solid structural layer;

SS: Laying of the water-permeable layer

Mixing the recycled aggregate and the modified asphalt of the permeable

Layer after heating, then laying the mixed recycled aggregate and modified asphalt on the solid structural layer and allowing the mixture to penetrate into the solid structural layer and leveling the overflowing mixture with the help of a

leveling device;

S6: Laying the top layer

If the moisture content in the permeable layer is below 30%, di4/502983

Top layer laid on the permeable layer and leveled with a leveling device.

Preferably, the middle stakes at a distance of 20-25m for the whole

Road section in step S1 and the scrambled poles are placed at a distance of 5-10m at the middle point of the road curve and a series of construction signs are placed at intervals of 50m around the road.

Preferably, in the compaction and leveling of the road bed in step S2, the road bed is checked by rolling the material with 15 ton rollers with wheel marks visible and must meet 95% heavy compaction standards.

Preferably, the gravel is laid on the top base course in step S3 in a thickness of 50-70mm with a compaction factor of more than 97%, and the recycled ones

Aggregates in the permeable layer will have a grain size of less than 12mm and be laid to a thickness of 60-100mm in step SS.

Preferably, after the paving has been laid in step S6, the pavement must first be covered with a plastic film and then the pavement must be regularly watered and maintained for 12-14 days after laying.

The present invention provides a pavement made from recycled aggregate for easy drainage and its method of laying. It has the following positives

Effects: 1. By using recycled aggregate and modified asphalt as a permeable layer, surface water above the road surface during rain or

Drainage through the pavement layer - permeable layer - upper base layer - lower

flow into the sub-base and eventually reach the ground, increasing the drainage capacity of the pavement and reducing the load on city drainage systems. 2. By putting a solid structural layer between the permeable layer and the base layer, the invention connects and fixes the materials of the permeable layer and the base layer through the steel structure of the solid institutional layer, enhance the tightness of the

Bonds each combined layer of pavement, enhancing the structural strength of the entire road. 3. By using a range of recycled materials, such as recycled

Aggregates and recycled rebar, the invention not only meets road drainage requirements, but also reduces pollution and pollution

Environmental damage caused by the rubble itself is realised

Recycles construction waste and reduces the cost of concrete in road construction by replacing the original concrete with recycled aggregate.

Description of the accompanying drawings

Figure 1 shows a schematic cross section through the covering structure of the present one

Invention.

Of which: 1st road surface layer; 2. permeable layer; 3. solid structural layer; 4. top base layer; 5. lower base layer

Detailed description

The technical solutions in the embodiments of the present invention are described in

In the following, in conjunction with the accompanying drawings, the embodiments of the present invention are clearly and fully described, and it is clear that the described

Embodiments are only part of the embodiments of the present invention, and not all of them. Starting from the embodiments of the present invention, all other embodiments achieved by a person skilled in the art without any creative work fall within the scope of the present invention.

embodiment

As shown in Figure 1, an embodiment of the present invention provides a

Paving pavement made of recycled aggregate ready for easy drainage, the pavement in order from top to bottom a road surface layer 1, a permeable

Layer 2 comprises a solid structural layer 3, an upper support layer 4 and a lower support layer 5, said road surface layer 1 having a permeable layer 2 at its lower end, said permeable layer 2 having a solid structural layer 3 at its lower end which said solid structural layer 3 has an upper support layer 4 at its lower end, said upper support layer 4 has a lower support layer 5 at its lower end

has end.

The material of the road surface layer 1 consists of 42.5 grade blast furnace slag, the blast furnace slag cement used in the road surface layer 1 is a low grade 42.5

hydration rate and good miscibility, which facilitates the formation of a stable mixture with the recycled aggregates in the permeable layer 2 during the mixing process, and the material of the permeable layer 2 is made of recycled aggregates and modified asphalt, the material of the solid structural layer 3 made from recycled structural steel, the material of the upper base layer 4 made of cement and

Gravel granules is made and the material of the lower base layer 5 consists of cement and crushed stone.

Comparison of Natural Recycled Aggregates Natural Recycled

Aggregates and recycled aggregates differ in their

usage properties. A comparison of the relevant properties of concrete with natural recycled aggregates and compacted concrete with recycled aggregates has been carried out through tests, the test results show the following: The determination of the

Grain size of the recycled aggregate in relation to the performance criteria for natural recycled aggregate yielded a recycled aggregate crushed limestone structure of 7/14 versus 14/20, but the compaction of the concrete was within specification requirements and the effective compaction of the concrete was poor due to the high

Water absorption of the recycled aggregate was completely different, with the compressive strength increasing with increasing regeneration time. Natural recycled aggregates are of superior quality and compressive strength of concrete with natural recycled

aggregate is higher.

Modified asphalt with a porosity of 25-28% is used for the permeable layer 2.

SBS modified asphalt used, the solid structural layer 3 consists of a solid

Structural frame with a reinforcement density of more than 18%, the cement used in the upper base layer 4 and the lower base layer 5 is 425 hydrochloric acid cement. 425 hydrochloric acid cement is a hard type of cement, and the surface of 425 hydrochloric acid cement is not easily cracked by the environment when it is used, so it can avoid cracks in the road surface to a certain extent.

Based on the optimized mix of compacted concrete, this pavement was installed with a lower cement content. When the cement content was reduced and was below 150 kg/m3, the reduced water was replaced by air, resulting in a significant increase in the

void fraction of the molded specimens and the 7d compressive strength was reduced by 4364/5029883 when the cement content was varied from 250 to 175 kg/m3. Therefore, if the compressive strength of the concrete is to be achieved, the cement content of the mixture should not be less than 200 kg/m3. 5 A method of laying an easily drainable pavement made from recycled

Aggregates, which includes the following laying steps:

S1: Construction of the road bed

Placing central stakes throughout the road section to be built, good control of the

Stakes at the beginning, middle and end of the curved section of road, good ones

cipher posts in the middle of the curve and good construction signs around the road;

S2: construction of the road substructure

Before the roadbed is excavated, humus, weeds, rubbish and

Building foundations are removed within the road bed, then the road bed is excavated according to the design requirements, and after the excavation, the

road bed compacted and leveled by repeated rolling with a roller;

S3: Laying the subfloor

The edges of the compacted and leveled roadbed are provided with the appropriate fencing, then the sub-base 5 is laid, after which the sub-base 5 is evenly distributed on the road bed with a grader, and after the sub-base 5 is leveled on the road bed, it is leveled the upper

Base layer 4 laid and leveled in the same way;

S4: Laying of the fixed structure

If the moisture content of the top support layer 4 and the bottom support layer 5, which are in

Step S3 is less than 60%, place the fixed structural layer 5 on the top support layer 4 and run the fixed end of the reinforcement structure on the fixed

Structural layer 5 in the upper support layer 4, whereby the laying of the fixed

structure layer 5 is completed;

SS: Laying of the water-permeable layer

Mixing the recycled aggregate and the modified asphalt of the permeable

Layer 2 after heating, then laying the mixed recycled aggregate and modified asphalt onto the solid structural layer 3 and allowing the mixture to penetrate into the solid structural layer 3 and leveling the overflowing mixture with the aid of a

leveling device;

S6: Laying the top layer

If the moisture content in the permeable layer 2 is below 30%, the

Top layer 1 laid on the permeable layer 2 and leveled with a leveling device.

The middle stakes will be at a distance of 20-25m for the whole

Road section in step S1 and the scrambled posts are set at a distance of 5-10m at the middle point of the road curve and a series of construction signs are set at intervals of 50m around the road, when the roadbed is dug, it should be sand and gravel or 9% gray soil treatment to be replenished, and after the

Requirements of the technical regulations of municipal civil engineering, stratified

Backfill on the roadbed below, roadbed shaping construction with grader scraping, from 8-10

Tons of light wheel roller after the initial pressure, hanging lines or use the level meter section by section to determine the roadway centerline height and road

Check arcing situation, and timely check the thickness of processing 902983

layer, road surface flatness, up each section of the longitudinal and transverse slope in line with the

design requirements.

In the compaction and leveling of the road substructure is in step S2

Road bed tested by rolling the material with 15 ton rollers with wheel marks visible and must meet 95% heavy compaction standards, in the pavement for the

Compaction, with 18-21T three-wheel roller or equivalent rolling test compaction times for 5-8 times is appropriate, the specific number of compaction can be based on

Site construction Environment, in compaction If the soil is found to be too dry and the top layer loose, it should be properly sprinkled with water; if the ground is too wet and the phenomenon of jumping is observed, measures such as excavation and

Drying, soil replacement, mixing with lime or granulated material may be applied until the subgrade surface is smooth, firm, with the prescribed road camber and free of loose material and soft spots before subsequent construction steps can be undertaken.

In step S3, the thickness of the crushed stone on the upper base layer 4 is 50-70mm, and the

Compaction coefficient is greater than 97%, through the crushed stone in a certain degree to increase the structural strength of the upper sub-base 4, but also through the gap between the crushed stone to increase the overall permeability of the road. In step S5, the recycled aggregate is incorporated in the permeable layer 2 with a grain size of less than 12mm in a thickness of 60-100mm. The gaps formed by the recycled aggregate with a grain size of less than 12mm enable an effective

Infiltration of water on the road surface.

In Step S6, after laying the road surface layer 5, the pavement must first be covered with a plastic film, and then the pavement must be regularly watered and maintained for 12-14 days after laying, after the completion of

Paving first use of plastic film to pave the finished road surface to cover protection to protect the surface of the road surface from other pollution in the

To prevent and through the regular sprinkling of water maintenance of the environment

Road surface can prevent the occurrence of dry cracking situation.

Although embodiments of the invention have been shown and described, the

Those skilled in the art that a variety of variations, modifications, substitutions and variants of these

Embodiments are possible without departing from the principles and spirit of the invention, the scope of which is limited by the appended claims and their equivalents.

Claims (8)

Claims LU502983 A paving surfacing made from recycled aggregates for easy drainage, characterized in that the surfacing comprises, in order from top to bottom, a road surface layer (1), a permeable layer (2), a solid structural layer (3), an upper base layer (4th ) and a lower base layer (5), said road surface layer (1) having a permeable layer (2) at its lower end, said permeable layer (2) having a solid structural layer (3) at its lower end, said solid structural layer (3) has an upper support layer (4) at its lower end, said upper support layer (4) has a lower support layer (5) at its lower end. 2. A pavement made of recycled aggregate for easy drainage according to claim 1, characterized in that the material of the road surface layer (1) consists of grade 42.5 blast furnace slag, the material of the permeable layer (2) is made of recycled aggregate and modified asphalt, the material of the solid structural layer (3) is made of recycled construction steel, the material of the upper base layer (4) is made of cement and gravel granules and the material of the lower base layer (5) consists of cement and gravel. 3. A paving made from recycled aggregate for easy drainage according to claim 2, characterized in that the permeable layer (2) uses a modified asphalt having a porosity of 25-28% SBS modified asphalt, the solid structural layer (3) uses a solid structural Forming scaffolding with a reinforcement density of more than 18%, the upper base layer (4) and the lower base layer (5) both use cement of 425 hydrochloric acid cement. 4. A method of laying an easily drainable recycled aggregate pavement according to any one of claims 1 to 3, characterized in that it comprises the following laying steps: S1: construction of the road bed setting of central piles throughout the road section to be built, good control of the piles at the beginning, in the middle and at the end of the curved section of road, good coding posts in the middle of the curve and good construction signs around the road; S2: Road bed construction Before the road bed is excavated, topsoil, weeds, refuse and building foundations inside the road bed are removed, then the road bed is excavated according to the design requirements, and after the excavation, the road bed is compacted and leveled by repeated rolling with a roller; S3: Laying the subgrade The edges of the compacted and leveled roadbed are provided with the appropriate fences, then the lower base course (5) is laid, after that the lower base course (5) is evenly distributed on the roadbed with a grader, and after the lower Base layer (5) is leveled on the road base, the upper base layer (4) is laid and leveled in the same way; S4: Laying the fixed structure If the moisture content of the top base layer (4) and the bottom base layer (5) laid in step S3 is less than 60%, lay the solid structure layer (5) on top of the top base layer (4 ) and insert the fixed end of the reinforcement structure on the fixed structural layer (5) into the upper support layer (4), making the laying of the fixed structure layer (5) is completed; LU502983 SS: Laying of the water permeable layer Mixing the recycled aggregate and the modified asphalt of the permeable layer (2) after heating, then laying the mixed recycled aggregate and the modified asphalt on the solid structural layer (3) and allowing the mixture to permeate the solid structural layer (3) and leveling the overflowing mixture using a leveling device; S6: Laying the top layer If the moisture content in the permeable layer (2) is below 30%, the top layer (1) is laid on top of the permeable layer (2) and leveled with a level. 5. A laying method for easy-drainage recycled aggregate paving according to claim 4, characterized in that the middle piles are installed at a distance of 20-25m for the whole road section in step S1 and the keyed piles at a distance of 5-10m at the middle point of the road curve and a series of construction signs placed at 50m intervals around the road. 6. Fin method of laying an easily drainable recycled aggregate pavement according to claim 4, characterized in that during the compaction and leveling of the road bed in step S2, the road bed is checked by rolling the material with 15 ton rollers with visible wheel tracks and 95 % must meet heavy compaction standards. 7. A laying method for easy-draining recycled aggregate paving according to claim 4, characterized in that the gravel is laid on the top base layer (4) in step S3 in a thickness of 50-70mm with a compaction factor of more than 97% , and the recycled aggregates in the permeable layer (2) in step SS have a grain size of less than 12 mm and are laid in a thickness of 60-100 mm. 8. A method of laying an easy-to-drain pavement covering made from recycled aggregates according to claim 4, characterized in that after laying the road surface layer (5) in step S6, the pavement must first be covered with a plastic film and the pavement then regularly watered and left for 12 -Requires maintenance for 14 days after laying.