CN113550189A

CN113550189A - Heavy haul road and laying method thereof

Info

Publication number: CN113550189A
Application number: CN202010333955.4A
Authority: CN
Inventors: 任和生; 南征; 郁炜; 杨丽娜; 陈哲
Original assignee: Guochuan International Construction Co ltd
Current assignee: Guochuan International Construction Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-10-26
Anticipated expiration: 2040-04-24
Also published as: CN113550189B

Abstract

The present invention provides a heavy haul road, comprising: graded rubble layer set up in graded rubble layer is last cement concrete basic unit, and set up in the last concrete layer that permeates water of cement concrete basic unit, its characterized in that, the concrete layer's that permeates water thickness more than or equal to 180mm, the concrete layer's that permeates water preparation material includes: 16-20 parts by weight of cement, 80-84 parts by weight of crushed stone, water in a water-cement ratio of 0.33 to 0.36, an inorganic reinforcing agent, and optionally a pigment. The technical scheme who this application discloses has greatly promoted the resistance to compression bending property of heavy haul road has prolonged life, has practiced thrift the cement quantity, and the effect of permeating water is splendid.

Description

Heavy haul road and laying method thereof

Technical Field

The present disclosure relates generally to a heavy haul road and a method for paving the same, and more particularly, to a heavy haul road containing an inorganic reinforcing agent and a method for manufacturing the same.

Background

The existing permeable concrete mainly uses reinforcing agents (additives) which mainly comprise organic reinforcing agents and inorganic reinforcing agents. Because the organic reinforcing agent is organic, the weather resistance is poor, the service life of the product is short, the strength is poor, and at present, no report that the organic reinforcing agent is directly used for construction of heavy-duty roads such as municipal roads or expressways is seen. The inorganic reinforcing agent has good stability, environmental protection, no emission, long service life and high compressive strength of products, the inorganic reinforcing agent has a small amount of experimental road construction projects in the Shanghai, Hebei and other places at present, the used aggregate is basalt or diabase, the compressive strength is about C35-C45 generally, and the inorganic reinforcing agent can meet the use requirements of common municipal roads and garden roads with small traffic flow. However, if the traffic flow on the construction road is large or the load capacity of the vehicle on the road is large, there is a problem that the service life of the road is greatly reduced if the vehicle is put into practical use.

Disclosure of Invention

One or more embodiments of the present invention overcome one or more of the above-described deficiencies.

The invention provides a heavy haul road containing an inorganic reinforcing agent and a preparation method thereof, wherein the method comprises the following implementation modes:

embodiment 1. a heavy haul, comprising: the graded rubble layer set up in the last cement concrete basic unit of graded rubble layer with set up in the last concrete layer that permeates water of cement concrete basic unit, the thickness more than or equal to 180mm on the concrete layer that permeates water, the preparation material on the concrete layer that permeates water includes: 16-20 parts by weight of cement, 80-84 parts by weight of crushed stone, water in a water-cement ratio of 0.33 to 0.36, an inorganic reinforcing agent, and optionally a pigment.

Embodiment 2. according to the heavy load road of embodiment 1, the graded gravel layer is laid on a gravel backfill layer, the gravel backfill layer is laid on a rammed earth layer, and the thickness of the gravel backfill layer is 100-400 mm.

Embodiment 3. according to the heavy load road of embodiment 1, a cement paste layer is provided between the cement concrete base layer and the pervious concrete layer for bonding the cement concrete base layer and the pervious concrete layer, and the preparation material of the cement paste layer includes the inorganic reinforcing agent.

Embodiment 4. according to the heavy load road of embodiment 1, the pervious concrete layer comprises a pervious concrete bottom layer and a pervious concrete surface layer,

the preparation materials of the pervious concrete bottom layer comprise: 16-20 parts of pervious concrete bottom cement and 80-84 parts of pervious concrete bottom crushed stone, wherein the pervious concrete bottom crushed stone comprises the following components in parts by weight: granite, cordierite and/or basalt having a particle diameter of more than 10 to 20mm or less, water such that a water-cement ratio is 0.33 to 0.36, and an inorganic reinforcing agent;

the preparation materials of the pervious concrete surface layer comprise: 16-20 parts of pervious concrete surface cement and 80-84 parts of pervious concrete surface crushed materials, wherein the pervious concrete surface crushed materials comprise: granite, cordierite and/or basalt having a particle size of 3 to 10mm, water such that the water-cement ratio is 0.33 to 0.36, an inorganic reinforcing agent, and optionally a pigment.

Embodiment 5. the heavy haul of

embodiment

1 or 4, wherein the inorganic reinforcing agent comprises: 13-18 wt% of boric acid, 3-9 wt% of sodium fluosilicate, 3-9 wt% of magnesium chloride, 2-8 wt% of sodium hexametaphosphate, 2-4 wt% of silicon nitride powder, 18-20 wt% of potassium chloride, 0.1-0.2 wt% of chelating dispersant, 0.05-0.09 wt% of sodium gluconate, and the balance of water.

Embodiment 6. the heavy haul road of any of embodiments 3-5, wherein the permeable concrete cover layer and the permeable concrete base layer are made of a material having a content of the inorganic reinforcing agent of 0.4 to 1 wt%, such as 0.4 to 0.7 wt%.

Embodiment 7. according to the heavy haul of any one of embodiments 3 to 5, the cement paste layer is made of: 30-35 wt% of a grout layer cement, 0.4 to 1.5 wt% of the inorganic reinforcing agent, and the balance of water.

Embodiment 8. according to the heavy load road of embodiment 1, the thickness of the graded crushed stone layer is 100 to 500mm, preferably 250 to 350 mm; the thickness of the cement concrete base layer is 150 to 400mm, preferably 200 to 300 mm; the thickness of the pervious concrete layer is any one of the following thicknesses: 180mm to 400mm, preferably 200 to 300 mm; the thickness of the cement paste layer is less than or equal to 2 mm.

Embodiment 9. the heavy haul of embodiment 5, the pigment comprising an iron oxide pigment.

Embodiment 10. the heavy haul road according to embodiment 5 or 7, wherein the grout layer cement, the pervious concrete sub-layer cement, and the pervious concrete face layer cement are all of the type po.42.5 cement (portland cement).

Embodiment 11. according to the heavy haul of embodiment 5, the inorganic reinforcing agent is prepared by:

the first step is as follows: respectively adding boric acid, sodium fluosilicate, magnesium chloride, sodium hexametaphosphate, silicon nitride powder, a chelating dispersant and sodium gluconate into a proper amount of water to prepare a boric acid solution, a sodium fluosilicate solution, a magnesium chloride solution, a sodium hexametaphosphate solution, a silicon nitride powder solution, a chelating dispersant solution and a sodium gluconate solution for later use;

the second step is that: slowly adding potassium chloride particles into the stirred boric acid solution, stopping feeding until the temperature rises to 80-85 ℃, adding normal-temperature water, continuing feeding when the temperature in the kettle is reduced to 60-65 ℃, repeatedly performing the step until the adding amount of the potassium chloride particles reaches 35-45% of the total amount, and then injecting the normal-temperature water;

the third step: when the temperature is reduced to 60-65 ℃, adding a sodium fluosilicate solution, and stirring for 10-15 minutes; adding a magnesium chloride solution, and stirring for 10-15 minutes; adding a sodium hexametaphosphate solution, stirring for 10-15 minutes, and controlling the temperature below 65 ℃; then adding silicon nitride powder solution, controlling the temperature below 60 ℃, and stirring for 10-15 minutes;

the fourth step: slowly adding potassium chloride particles for the second time, stopping feeding when the temperature rises to 80 ℃, adding normal-temperature water, and continuing feeding when the temperature is reduced to 60-65 ℃ until the rest potassium chloride particles are completely added;

the fifth step: adding a chelating dispersant, stirring for 10-15 minutes, adding sodium gluconate and the rest of normal-temperature water, and continuously stirring for 48-50 hours.

Embodiment 12. according to the heavy haul of embodiment 5, the pervious concrete face crushed stone comprises a combination of two stones: 60 to 80 wt% of stone with a grain size of more than 5mm to 10mm or less, and 20 to 40 wt% of stone with a grain size of 3 to 5 mm.

Embodiment 13. according to the heavy haul road of embodiment 5, the pervious concrete facing layer has a thickness of 35mm or more and 80mm or less.

Embodiment 14. according to the heavy load road of embodiment 1, the cement concrete base layer is provided with a drainage structure, the drainage structure being in communication with a drainage system, for example, wherein the drainage structure comprises at least one of: the cement concrete base layer is arranged on the upper surface of the cement concrete base layer, the upper surface of the cement concrete base layer inclines towards the drainage system by an angle of 0.1-2%, the groove which is arranged on the upper surface of the cement concrete base layer and is communicated with the drainage system, or the combination of the two.

Embodiment 15. a method of laying an outdoor pavement according to any one of embodiments 1 to 14, comprising: laying a graded gravel layer, laying a cement concrete base layer on the graded gravel layer, laying a cement slurry layer on the cement concrete base layer, and laying a permeable concrete layer on the cement slurry layer, so that the cement slurry layer is bonded with the cement concrete base layer and the permeable concrete layer.

Embodiment 16. according to the method of embodiment 15, the graded gravel layer is laid on a gravel-back layer, and the gravel-back layer is laid on a plain soil compacted layer.

Embodiment 17. the step of "laying a pervious concrete layer on the cement slurry layer" according to the laying method of embodiment 15 comprises laying a pervious concrete base layer immediately followed by laying a pervious concrete cover layer.

According to the technical scheme, the inorganic reinforcing agent is added, so that the compression resistance and the bending resistance of the heavy haul road are greatly improved, the service life is prolonged, the cement consumption is saved, the water permeable effect is excellent, and the cement slurry layer containing the inorganic reinforcing agent is arranged between the cement concrete base layer and the water permeable concrete layer, so that the heavy haul road is effectively prevented from being layered. The solution according to the present application also brings numerous other advantages, which will be explained in detail in the detailed description.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

FIG. 1 is a schematic structural diagram of the heavy load road;

FIG. 2 is a flow chart of the construction of the heavy haul road;

FIG. 3 is a schematic view of the drainage structure of the heavy haul road.

Reference numerals: the concrete comprises, by weight, 1-a pervious concrete layer, 11-a pervious concrete surface layer, 12-a pervious concrete bottom layer, 2-a cement slurry layer, 3-a cement concrete base layer, 4-a graded gravel layer, 5-a gravel backfill layer, 6-a plain soil tamping layer and 7-a blind pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

In the present application, each term has a meaning generally understood in the art, unless otherwise indicated or a different meaning can be derived from the context.

One aspect of the present invention provides a heavy haul road, comprising: the graded rubble layer set up in the last cement concrete basic unit of graded rubble layer with set up in the concrete layer that permeates water on the cement concrete basic unit, the preparation material on the concrete layer that permeates water includes: 16-20 parts by weight of cement, 80-84 parts by weight of crushed stone, water in a water-cement ratio of 0.33 to 0.36, an inorganic reinforcing agent, and optionally a pigment. Technical feature in this application "set up in the last concrete layer that permeates water of cement concrete basic unit" adopts set up on the cement concrete basic unit the concrete layer's that permeates water structure makes the heavy load road keeps stable foundation structure when possessing the moisture retention ability that permeates water, particularly, the concrete layer that permeates water possesses the moisture retention ability that permeates water, enables ponding and oozes down rapidly, the cement concrete basic unit is impervious conventional cement concrete, and it can bear the heavily pressing of concrete layer conduction that permeates water is stabilized can prevent the water that the road surface from oozing down and get into in the heavy load road structure further the cement concrete basic unit with the graded broken stone layer makes the heavy load road possesses lasting stability. Unexpected discovery of this application inventor adopts this application to provide the mix proportion on pervious concrete layer enables when reducing the cement quantity on prior art basis, makes pervious concrete layer produces excellent compressive strength, rupture strength pervious concrete layer can satisfy the oversize vehicle current when the thickness more than or equal to 180mm on pervious concrete layer, and the extension the life on heavy load way, pervious concrete layer still has excellent water retention performance that permeates water, can prevent surface gathered water. In some preferred embodiments, the preparation material of the pervious concrete layer further comprises pigment, so that the color of the heavy-duty road pavement can be designed according to actual requirements. Parts by weight in this application refer to the relative weight proportions of the various components in the same composition. And weight percent (wt%) refers to the relative weight of the individual components of the composition relative to the total composition.

In the application, the term "heavy load road" or similar terms have the same meaning, and refer to a road with a compressive strength of more than 50MPa and a flexural strength of more than 5.0MPa, which are determined according to the standard GB/T50081-2002 of the common concrete mechanical property test method. The term "permeable concrete layer" refers to a concrete layer with a certain through hole to meet the requirement of water permeability on the heavy-duty road surface; the term "water-cement ratio" has the usual meaning understood by a person skilled in the art, i.e. the ratio by weight of the amount of water used in the concrete to the amount of cement used; the term "crushed stone" means stone or natural pebbles crushed from rocks, and the shape and size thereof are not particularly limited as long as they serve as a skeleton and a filling function in the concrete surface layer; the term "inorganic reinforcing agent" means an additive for improving the mechanical properties of concrete prepared mainly from inorganic raw materials, but it is understood that, firstly, reinforcing agents in which the main raw materials are inorganic substances but contain a small amount of organic substances also belong to the inorganic reinforcing agents described in the present application, and, secondly, the technical effect of adding the inorganic reinforcing agents is not limited to the improvement of the mechanical properties of concrete.

In some embodiments, as a general laying method, the graded gravel layer is laid on a gravel backfill layer laid on a plain soil tamped layer, and the thickness of the gravel backfill layer is 100 to 400 mm. Soft soil in the foundation bearing layer is replaced by the gravel backfill layer, so that the bearing capacity of the foundation bearing layer can be improved, and the thickness of the gravel backfill layer is selected according to design requirements.

In some embodiments, a cement paste layer is disposed between the cement concrete base layer and the pervious concrete layer for bonding the cement concrete base layer and the pervious concrete layer, and the cement paste layer is prepared from a material including the inorganic reinforcing agent, thereby effectively preventing a delamination phenomenon between the cement concrete base layer and the concrete layer. The cement concrete base layer and the permeable concrete layer can be effectively bonded by arranging the cement slurry layer added with the inorganic reinforcing agent on the interface, so that the layering phenomenon is prevented, the two layers are compounded to achieve higher compressive strength, and the service life of a road is prolonged. In the construction process, the surface of the cement concrete base layer is subjected to galling treatment, the roughness of the cement concrete base layer is increased, and the cement concrete base layer is combined with the setting of the cement slurry layer, so that the effect is better.

In some embodiments, the pervious concrete layer comprises a pervious concrete bottom layer and a pervious concrete top layer, and the pervious concrete bottom layer is prepared from a material comprising: 16-20 parts of pervious concrete bottom cement and 80-84 parts of pervious concrete bottom crushed stone, wherein the pervious concrete bottom crushed stone comprises the following components in parts by weight: granite, cordierite and/or basalt having a particle diameter of more than 10 to 20mm or less, water such that a water-cement ratio is 0.33 to 0.36, and an inorganic reinforcing agent; the preparation materials of the pervious concrete surface layer comprise: 16-20 parts of pervious concrete surface cement and 80-84 parts of pervious concrete surface crushed materials, wherein the pervious concrete surface crushed materials comprise: granite, cordierite and/or basalt having a particle size of 3 to 10mm, water such that the water-cement ratio is 0.33 to 0.36, an inorganic reinforcing agent, and optionally a pigment. Under the same condition, the strength of the gravel concrete is higher than that of the pebble concrete, in the prior art, the gravel concrete generally adopts bluestone and basalt gravel with better strength and fracture resistance as aggregates, the particle size is generally 5-10mm or 10-16mm, but the cost is higher. In the application, besides bluestone and basalt, the permeable concrete bottom layer preparation material can also adopt granite crushed stones with the particle size of 10-20mm to reduce the cost, and particularly, the granite crushed stones produced by adopting the impact crushing technology have better mechanical properties due to high proportion of round and centrum-shaped crushed stones and low proportion of flaky crushed stones, so that the compressive and flexural strength and the impact resistance of a road can be obviously enhanced; the pervious concrete surface layer preparation material also adopts granite, and the preferred granite stone material that adopts the particle size of 3 to 10mm of broken technique production of counterattack can make the road effect show more pleasing to the eye, in order to realize the best resistance to compression flexural strength with the minimum cost, satisfy the heavy-duty road requirement.

In some embodiments, the inorganic reinforcing agent comprises: 13-18 wt% of boric acid, 3-9 wt% of sodium fluosilicate, 3-9 wt% of magnesium chloride, 2-8 wt% of sodium hexametaphosphate, 2-4 wt% of silicon nitride powder, 18-20 wt% of potassium chloride, 0.1-0.2 wt% of chelating dispersant, 0.05-0.09 wt% of sodium gluconate, and the balance of water. The inorganic reinforcing agent can promote the expansion of cement paste crystals wrapped around the crushed stone, greatly improves the strength of the pervious concrete surface layer, and enables the outdoor ground to be firmer, more durable and more wear-resistant. Meanwhile, the inorganic reinforcing agent and cement are hydrolyzed to disperse a large number of particles and excite the ionic reaction of free calcium, so that the cement consumption is reduced, and the effects of saving the cement consumption and reducing the cost are achieved.

In some embodiments, the inorganic reinforcing agent is present in the preparation material of the pervious concrete facing and the pervious concrete base in an amount of 0.4 to 1 wt%, such as 0.4 to 0.7 wt%.

In some embodiments, the cement slurry layer is made from: 30-35 wt% of a grout layer cement, 0.4 to 1.5 wt% of the inorganic reinforcing agent, and the balance of water.

In some embodiments, the graded crushed stone layer has a thickness of 100 to 500mm, preferably 250 to 350 mm; the thickness of the cement concrete base layer is 150 to 400mm, preferably 200 to 300 mm; the thickness of the pervious concrete layer is any one of the following thicknesses: 180mm to 400mm, preferably 200 to 300 mm; the thickness of the cement paste layer is less than or equal to 5mm, less than or equal to 4mm, less than or equal to 3mm, less than or equal to 2mm, or less than or equal to 1 mm.

In some embodiments, the pigment comprises an iron oxide pigment. The iron oxide pigment is a colored inorganic pigment with good dispersibility, excellent light resistance and weather resistance, has excellent application performances of wide color spectrum, multiple colors, low price, no toxicity and the like, and is very suitable for serving as the pigment.

In some embodiments, the grout layer cement, the pervious concrete primer cement, and the pervious concrete face layer cement are all types po.42.5 cement (portland cement). In the present application, "grout layer cement", "pervious concrete bottom layer cement" and "pervious concrete surface layer cement" are not limitations on the type, specification or other indexes of cement, and are only used for easy understanding of the cement used for preparing the corresponding structure.

In some embodiments, the inorganic reinforcing agent is prepared by:

In some embodiments, the pervious concrete facing crushed stone comprises a combination of two stones: 60 to 80 wt% of stone with a grain size of more than 5mm to 10mm or less, and 20 to 40 wt% of stone with a grain size of 3 to 5 mm. The combination of the crushed stones with different grain diameters can make the road effect more beautiful and simultaneously achieve the highest compression strength and bending strength.

In some embodiments, the pervious concrete facing has a thickness of 35mm or more and 80mm or less. In some embodiments, the cementitious concrete base layer is provided with a drainage structure in communication with a drainage system, for example, wherein the drainage structure comprises at least one of: the cement concrete base layer is arranged on the upper surface of the cement concrete base layer, the upper surface of the cement concrete base layer inclines towards the drainage system by an angle of 0.1-2%, the groove which is arranged on the upper surface of the cement concrete base layer and is communicated with the drainage system, or the combination of the two. The drainage system may be a water collecting/storing well or other drainage system meeting design standards, and the design of the drainage structure is not particularly limited, and those skilled in the art can design the drainage system according to actual field environments. For example, for a road that naturally drains to green belts or drainage ditches on both sides of the road, the cement concrete base layer may not be treated with a special drainage structure if the road is narrow. For wider roads, the cement concrete base layer surface is inclined at an angle of 0.1-2% from one side of the road to the other side having the water collection wells, according to the arrangement of the water collection wells. For a wider road passing in two directions, the road can be inclined by 0.1-2% from the middle of the road to two sides, and the specific inclination angle is based on the final data of a design unit. In some embodiments, blind pipes may also be provided in the grooves to increase run-off.

In some preferred embodiments, the drainage of the subsurface water to the drainage system may be increased by providing a blind ditch or burying a blind pipe in the cement concrete base layer, for example, the blind ditch may be embodied as follows: according to the designed position of the water collecting/storing well, a blind ditch with the width of 70-150 mm and the depth of 40-100mm is formed in the upper part of the cement concrete base layer on one side of the water collecting/storing well, the water collecting/storing well is connected with two ends of the blind ditch, and coarse aggregate can be filled in the blind ditch or blind pipes can be laid to increase runoff. If the blind pipe needs to be buried in the design, the depth of the blind ditch is consistent with the outer diameter of the blind pipe, and the blind pipe is arranged in the blind ditch.

Another aspect of the present application provides a method for laying the heavy haul road, including: laying a graded gravel layer, laying a cement concrete base layer on the graded gravel layer, laying a cement slurry layer on the cement concrete base layer, and laying a permeable concrete layer on the cement slurry layer, so that the cement slurry layer is bonded with the cement concrete base layer and the permeable concrete layer. The cement slurry layer can be paved on the cement concrete base layer by brushing cement slurry, spraying or other methods, the cement slurry is stirred on the construction site, and if the cement slurry needs to be stirred far away from the construction site, the transportation time is within 30 minutes (slightly different according to the temperature condition). When the permeable concrete surface layer is used on site, the permeable concrete surface layer is uniformly applied to the surface of the cement concrete base layer in time after being uniformly stirred, and the permeable concrete surface layer is paved under the moisture-keeping state.

In some embodiments, the graded gravel layer is laid on a gravel backfill layer, which is laid on a rammed earthenware layer.

In some embodiments, the step of laying a pervious concrete layer on the cement slurry layer comprises laying a pervious concrete base layer immediately followed by laying a pervious concrete cover layer.

The ranges described above may be used alone or in combination. The present application can be more easily understood by the following examples.

Examples

Example 1

The present embodiment discloses a color heavy road, as shown in fig. 1, which includes: lay grit backfill layer 5 on plain soil tamp layer 6, lay in graded gravel layer 4 on the grit backfill layer 5, set up in cement concrete basic unit 3 on graded gravel layer 4, set up in concrete layer 1 permeates water on the cement concrete basic unit 3, wherein, the concrete layer 1 permeates water is including permeating water concrete bottom 12, and set up in permeate water concrete surface course 11 on the concrete bottom 12 permeates water cement concrete basic unit 3 with it sets up cement paste layer 2 to permeate water between the concrete bottom 12, is used for bonding cement concrete basic unit 3 with permeate water concrete bottom 12, cement concrete basic unit 3 is provided with drainage structures.

The ramming coefficient of the plain soil ramming layer 6 is 93%, the thickness of the gravel backfill layer 5 is 300mm, the thickness of the graded gravel layer 4 is 300mm, the thickness of the cement concrete base layer 3 is 250mm, the thickness of the cement slurry layer 2 is less than 1mm, the thickness of the pervious concrete bottom layer 12 is 150mm, and the thickness of the pervious concrete surface layer 11 is 50 mm.

As shown in fig. 2, the heavy haul of this embodiment is configured as follows:

1. the construction of the vegetarian soil tamping layer 6, the gravel backfill layer 5 and the graded gravel layer 4 is consistent with the construction requirement of a common site base layer, wherein the gravel backfill layer 5 adopts 4:6 gravel for backfilling.

2. Cement concrete base layer 3 and drainage structure

For adopting C25 cement concrete, the cement concrete basic unit 3 can bear the heavy load of the concrete layer 1 conduction of permeating water, is stabilizing the water that can prevent the road surface infiltration in the time of heavy load road structure further infiltration entering cement concrete basic unit 3 with graded broken stone layer 4 makes the heavy load road possesses lasting stability. Meanwhile, as a drainage layer of the heavy haul road, the cement concrete base layer 3 is provided with a drainage structure communicated with a drainage system, water seeped by the pervious concrete surface layer 11 is organically discharged to the drainage system through the drainage structure, the drainage structure is arranged as shown in the attached drawing 3, the section of the drainage structure of the heavy haul road arranged from the road to the roadside is shown in the drawing, the cement concrete base layer 3 inclines 1% from the middle of the road to the drainage system positioned on two sides, the drainage system is a water collecting well, a blind ditch 50mm deep and 70mm wide is formed in the upper part of the cement concrete base layer on one side of the water collecting well, and a blind pipe 7 is buried in the blind ditch and is connected with the water collecting well.

3. Cement paste layer 2

The cement slurry used in the cement slurry layer 2 is prepared by mixing the following raw materials in percentage by weight: 35 wt% of slurry cement, 64.7 wt% of water and 0.4 wt% of inorganic reinforcing agent A0.5 wt%, wherein the slurry cement is PO.42.5 common portland cement produced by the conch cement company, and the water is local tap water. The cement paste is stirred in a construction site, is timely and uniformly sprayed on the surface of the cement concrete base layer after being uniformly stirred, the paving thickness is less than 1mm, and the pervious concrete surface layer is paved under the moisture-preserving state.

4. Permeable concrete layer 1

The pervious concrete layer 1 comprises a pervious concrete bottom layer 12 and a pervious concrete surface layer 11, and the pervious concrete bottom layer and the pervious concrete surface layer are prepared from the following raw materials in parts by weight: 16 parts of surface cement, 84 parts of crushed stone, 5.3 parts of water (the water-cement ratio is 0.33), 0.5 part of inorganic reinforcing agent A, wherein the cement adopts PO.42.5 ordinary portland cement produced by conch cement company, the water adopts local tap water, and the crushed stone adopts granite crushed stone produced by impact crushing technology, wherein, the granite crushed stone particle size of the pervious concrete bottom layer 12 is more than 10 to less than or equal to 20mm, the granite crushed stone of the pervious concrete surface layer 11 is formed by grading of 5-10mm particle size of 70 wt% and 3-5mm particle size of 30 wt%, and the crushed stone combination with different particle sizes can make the road effect more beautiful and simultaneously reach the highest compression and bending strength. The permissible error of the raw materials (by mass) should not exceed the following specifications: cement plus or minus 1%, crushed stone plus or minus 2%, inorganic reinforcing agent A plus or minus 1% and water plus or minus 1%.

The pervious concrete layer 1 mixture is prepared by the following process: the measured crushed stone and cement are put into a forced mixer together, the dry mixing is carried out for 15 seconds, after the even mixing is carried out, the measured water and the inorganic reinforcing agent A are blended, the obtained mixture is added into the mixer to be fully mixed for about 120 seconds, and the mechanical mixing time can be properly prolonged according to the even mixing viscosity degree, but the mechanical mixing time is not longer than 5 minutes.

During the transportation of the mixture of the pervious concrete layer 1, segregation and initial setting are prevented, the humidity of the mixture is kept, and measures such as covering are taken when the weather is hot or the transportation time exceeds 10 minutes. The time of the mixture 1 in the pervious concrete layer from the discharge of the mixer to the transportation to the construction site is determined according to the initial setting time of cement and the construction temperature, and is as follows:

TABLE 1 longest construction time determined from surface temperature

Construction surface temperature t (DEG C)	Allowed maximum construction time (h)
		5≤t＜10	2
10≤t＜20	1.5
		20≤t＜30	0.5
30≤t＜35	0.25

5. Inorganic reinforcing agent A

The inorganic reinforcing agent A comprises the following raw materials in percentage by weight:

TABLE 2 inorganic reinforcing agent A compounding ratio

Raw materials	Weight percent (wt%)
		Boric acid	13
Sodium fluorosilicate	3
		Magnesium chloride	3
Sodium hexametaphosphate	2
		Silicon nitride powder	2
Potassium chloride	18
		Chelating dispersants	0.1
Sodium gluconate	0.05
		Water (W)	58.85

The inorganic reinforcing agent A is prepared by the following process:

the first step is as follows: respectively adding boric acid, sodium fluosilicate, magnesium chloride, sodium hexametaphosphate, silicon nitride powder, a chelating dispersant and sodium gluconate into a proper amount of water for dissolving to prepare a boric acid solution, a sodium fluosilicate solution, a magnesium chloride solution, a sodium hexametaphosphate solution, a silicon nitride powder solution, a chelating dispersant solution and a sodium gluconate solution for later use;

6. Spray finishing paint

Spraying finish paint on the surface of the heavy haul road according to the designed color, wherein the finish paint is water-based polyurethane paint, and the spraying amount is 0.16-0.33 Kg/m²Clear and beautiful, has no peculiar smell or stimulation, and does not fade after long-term use.

Example 2

The embodiment discloses a heavy load road, the structure of which is the same as that of embodiment 1, and the difference is that: the gravel backfill layer 5 is 400mm thick, the graded gravel layer 4 is 100mm thick, the cement concrete base layer 3 is 150mm thick, the cement slurry layer 2 is less than 2mm thick, the pervious concrete bottom layer 12 is 100mm thick, and the pervious concrete surface layer 11 is 80mm thick.

The cement slurry used in the cement slurry layer 2 is prepared by mixing the following raw materials in percentage by weight: 30 wt% of slurry layer cement, 68.5 wt% of water and 1.5 wt% of inorganic reinforcing agent B1.

The pervious concrete layer 1 is prepared from the following raw materials in parts by weight: 20 parts of cement, 80 parts of crushed stone, 7 parts of water (the water-cement ratio is 0.35) and 0.5 part of inorganic reinforcing agent B.

The inorganic reinforcing agent B comprises the following raw materials in percentage by weight (wt%), and is prepared by the same process flow as the inorganic reinforcing agent A in the example 1:

TABLE 3 inorganic reinforcing agent B compounding ratio

Raw materials	Weight percent (wt%)
		Boric acid	18
Sodium fluorosilicate	9
		Magnesium chloride	9
Sodium hexametaphosphate	8
		Silicon nitride powder	4
Potassium chloride	20
		Chelating dispersants	0.2
Sodium gluconate	0.09
		Water (W)	31.71

Comparative example

Comparative example 1 (using hot-cast emulsified asphalt instead of grout layer control): the difference from example 1 is that the cement paste layer is not provided, and hot-cast emulsified asphalt is used instead.

Comparative example 2 (setting a conventional cement slurry layer control): the difference from example 1 is that the cement paste layer is a normal cement paste containing no inorganic reinforcing agent a.

Comparative example 3 (prior art control): the difference from example 2 is that 80 parts by weight of the crushed stone in the mix proportion of the pervious concrete layer was replaced with 10 parts by weight of sand and 70 parts by weight of crushed stone, and the inorganic reinforcing agent B was replaced with a commercially available organic pervious concrete reinforcing agent. The cement amount and the water cement ratio of comparative example 3 were the same as those of example 2.

Comparative example 4 (prior art increased cement dosage control): the difference from the embodiment 2 is that in the mix proportion of the pervious concrete layer, 20 parts by weight of cement is replaced by 25 parts by weight, 80 parts by weight of the crushed stone is replaced by 10 parts by weight of sand and 65 parts by weight of crushed stone, 7 parts by weight of water is replaced by 8.75 parts by weight, and the inorganic reinforcing agent B is replaced by a commercial organic pervious concrete reinforcing agent. The cement of comparative example 4 was used in an amount of 5 parts by weight more than that of example 2, and the water cement ratio was the same as that of example 2.

Detecting the index

1. Compressive strength and flexural strength

The concrete test blocks of the pervious concrete layers of examples 1 and 2 and comparative examples 3 and 4 were tested for compressive strength and flexural strength in sequence, the test block age was 28 days, the test method was in accordance with general concrete mechanical property test method Standard (GB/T50081-2002), and the test results are as follows:

TABLE 4 concrete test block detection results of pervious concrete layer

Index (I)	Compressive strength (MPa)	Flexural strength (MPa)
			Example 1	52.1	5.6
Example 2	53.7	5.9
			Comparative example 3	32.7	4.3
Comparative example 4	36.2	4.4

And (4) conclusion: as can be seen from the table above, the compressive strength and the flexural strength of the permeable concrete layers in the embodiment 1 and the embodiment 2 both meet the strength requirement of the heavy-duty road;

compared with the prior art of the comparative example 3, the compressive strength and the flexural strength of the pervious concrete layers in the 2 examples are improved to different degrees;

compared with the comparative example 4, the compression strength and the breaking strength of the example 2 are improved while 5% of cement is saved and sand is not used;

the data show that the technical scheme has the technical effects of improving the strength of the pervious concrete pavement and saving the cement consumption in construction.

2. Setting cement paste layer effect contrast

The concrete interface deformation of each layer after the ground is cured in the embodiment 1 and the comparative examples 1 and 2 is observed, and it can be seen that the layering phenomenon occurs between the permeable concrete bottom layer and the cement concrete base layer under the condition that the hot glue emulsified asphalt is used or a common cement slurry layer is arranged, the layering phenomenon is particularly obvious when the temperature change is large, and the layering phenomenon does not occur in the embodiment 1, which shows that the technical scheme disclosed by the application can effectively solve the layering problem in the prior art.

3. Coefficient of water permeability and continuous porosity

The water permeability coefficient and the continuous porosity of the pervious concrete pavement concrete test blocks of the example 2 and the comparative examples 3 and 4 were sequentially detected, and the detection method was in accordance with technical code of pervious cement concrete pavement (CJJ/T135-2009), and the detection results are shown in the following table:

TABLE 5 pervious concrete surface concrete test block test results

Index (I)	Example 2	Comparative example 3	Comparative example 4
				Coefficient of water permeability (mm/s)	2.5	1.1	0.7
Continuous porosity (%)	20	12	10

And (4) conclusion: it can be seen from the above table that the coefficient of permeability and the continuous porosity of the pervious concrete adopting the technical scheme disclosed in the application are all higher than the scheme in the prior art, the technical scheme adopting the conventional reinforcing agent can add more sand and cement in order to meet the mechanical property of the pervious concrete, the porosity is correspondingly reduced, the permeability is also poor, and the inorganic reinforcing agent adopted in the application enables the pervious concrete to have excellent permeability while improving the strength of the pervious concrete.

4. Abrasion and freezing resistance test

The concrete test blocks of the pervious concrete surface layers of example 2 and comparative examples 3 and 4 were sequentially tested for wear resistance and frost resistance, wherein the wear resistance was tested according to the test method for wear resistance of inorganic floor materials (GB/T12988-:

table 6 pervious concrete surface concrete test block test results

Index (I)	Example 2	Comparative example 3	Comparative example 4
				Abrasion resistance (pit length/mm)	13	25	23
Freezing resistance (mass loss rate/%, after 25 freeze-thaw cycles)	2	5	5

And (4) conclusion: can see out by last table, adopt this application technical scheme, the wearability and the freezing resistance of concrete surface course that permeates water all obtain the reinforcing, show that this application technical scheme's outdoor ground is wear-resisting durable more, and its life is good at prior art scheme.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A heavy haul, comprising:

a graded crushed stone layer is arranged on the upper surface of the steel pipe,

a cement concrete base layer disposed on the graded crushed stone layer, an

A pervious concrete layer arranged on the cement concrete base layer,

the permeable concrete layer is characterized in that the thickness of the permeable concrete layer is more than or equal to 180mm, and the permeable concrete layer is prepared from the following materials:

16-20 parts by weight of cement,

80-84 parts by weight of crushed stone,

water in a water-cement ratio of 0.33 to 0.36,

an inorganic reinforcing agent, and

optionally a pigment.

2. The heavy load road of claim 1, wherein the graded gravel layer is laid on a gravel backfill layer, the gravel backfill layer is laid on a rammed earth layer, and the thickness of the gravel backfill layer is 100-400 mm.

3. The heavy load road of claim 1, wherein a cement paste layer is provided between the cement concrete base layer and the pervious concrete layer for bonding the cement concrete base layer and the pervious concrete layer, and a preparation material of the cement paste layer comprises the inorganic reinforcing agent.

4. The heavy load road of claim 1, wherein the pervious concrete layer comprises a pervious concrete bottom layer and a pervious concrete top layer,

the preparation materials of the pervious concrete bottom layer comprise:

16-20 parts by weight of pervious concrete bottom cement,

80-84 parts by weight of pervious concrete bottom crushed stone, wherein the pervious concrete bottom crushed stone comprises: granite, cordierite and/or basalt having a particle size of more than 10 to 20mm or less, and

water to a water-to-cement ratio of 0.33 to 0.36, and

an inorganic reinforcing agent;

the preparation materials of the pervious concrete surface layer comprise:

16-20 parts by weight of pervious concrete surface cement,

80-84 parts by weight of pervious concrete surface crushed stone, wherein the pervious concrete surface crushed stone comprises: granite, bluestone and/or basalt with a particle size of 3 to 10mm,

water in a water-cement ratio of 0.33 to 0.36,

an inorganic reinforcing agent, and

optionally a pigment.

5. The heavy duty road according to claim 1 or 4, wherein said inorganic reinforcing agent comprises:

13 to 18 wt% of boric acid,

3-9 wt% of sodium fluosilicate,

3 to 9 wt% of magnesium chloride,

2 to 8 wt% of sodium hexametaphosphate,

2 to 4 wt% of silicon nitride powder,

18 to 20 wt% of potassium chloride,

0.1 to 0.2 wt% of a chelating dispersant,

0.05 to 0.09 wt% of sodium gluconate, and

the balance of water.

6. A heavy load road according to any of claims 3-5, wherein the inorganic reinforcing agent is present in the material from which the pervious concrete facing layer and the pervious concrete base layer are made in an amount of 0.4 to 1 wt%, such as 0.4 to 0.7 wt%.

7. A heavy load road according to any of claims 3-5, characterized in that the cement paste layer is made of:

30-35 wt% of a cement in the slurry layer,

0.4 to 1.5 wt% of the inorganic reinforcing agent, and

the balance of water.

8. The heavy load circuit according to claim 1,

the thickness of the graded crushed stone layer is 100 to 500mm, preferably 250 to 350 mm;

the thickness of the cement concrete base layer is 150 to 400mm, preferably 200 to 300 mm;

the thickness of the pervious concrete layer is any one of the following thicknesses: 180mm to 400mm, preferably 200 to 300 mm;

the thickness of the cement paste layer is less than or equal to 2 mm.

9. The heavy duty road of claim 5, wherein said pigment comprises an iron oxide pigment.

10. The heavy haul road of claim 5 or 7, wherein the grout layer cement, the pervious concrete sub-layer cement, and the pervious concrete face layer cement are all of the type PO.42.5 cement (Portland cement).

11. The heavy duty road of claim 5, wherein said inorganic reinforcing agent is prepared by:

12. The heavy load road of claim 5, wherein the pervious concrete facing crushed stone comprises a combination of two of the following stones:

60 to 80% by weight of stones having a grain size of more than 5mm to 10mm or less, and

20 to 40 wt% of stone having a grain size of 3 to 5 mm.

13. The heavy load road of claim 5, wherein the pervious concrete facing has a thickness of 35mm or more and 80mm or less.

14. The heavy load road of claim 1, wherein the cement concrete base layer is provided with a drainage structure in communication with a drainage system, for example, wherein the drainage structure comprises at least one of: the cement concrete base layer is arranged on the upper surface of the cement concrete base layer, the upper surface of the cement concrete base layer inclines towards the drainage system by an angle of 0.1-2%, the groove which is arranged on the upper surface of the cement concrete base layer and is communicated with the drainage system, or the combination of the two.

15. A method of laying an outdoor pavement according to any one of claims 1 to 14,

laying a graded broken stone layer,

a cement concrete base layer is laid on the graded crushed stone layer,

laying a layer of cement paste on said cement concrete base, and

and paving a permeable concrete layer on the cement paste layer, so that the cement paste layer is bonded with the cement concrete base layer and the permeable concrete layer.

16. A method of laying according to claim 15 wherein the graded gravel layer is laid on a gravel backfill layer which is laid on a rammed earthenware layer.

17. The method of laying of claim 15 wherein the step of laying a pervious concrete layer over the grout layer comprises laying a pervious concrete base layer immediately followed by laying a pervious concrete face layer.