阅读说明：本技术 一种预制路面材料、路面预制块、沥青路面预制件及其施工方法 (Prefabricated pavement material, pavement prefabricated block, asphalt pavement prefabricated member and construction method thereof ) 是由 毛益佳 吴超 李华 张苏龙 张南童 潘芳 王彤 陈广辉 于 2020-08-10 设计创作，主要内容包括：本发明提供了一种预制路面材料、路面预制块、沥青路面预制件及其施工方法,涉及路面预制件技术领域。该预制路面材料采用特定级配的级配碎石与胶结料组成,该级配碎石通过科学的合理级配设计,保障了预制路面混合材料具有足够的孔隙,既实现了内部的排水,同时还降低了道路表面的噪音。通过胶结料将级配碎石连接在一起,使得预制路面材料的抗压强度和劈裂强度满足行车的要求。由多个路面预制块组装形成的沥青路面预制件可以用于高等级公路、桥面铺装,拓宽了预制路面的功能。路面预制块能够降低热沥青铺筑的有害气体对工人的危害,同时节省了水泥混合料施工养生时间。(The invention provides a prefabricated pavement material, a pavement prefabricated block, an asphalt pavement prefabricated member and a construction method thereof, and relates to the technical field of pavement prefabricated members. The prefabricated pavement material is composed of graded broken stones with specific grading and cementing materials, and the graded broken stones ensure that the prefabricated pavement mixed material has enough pores through scientific and reasonable grading design, so that internal drainage is realized, and the noise of the road surface is reduced. The graded broken stones are connected together through the cementing material, so that the compressive strength and the splitting strength of the prefabricated pavement material meet the requirements of traveling. The asphalt pavement prefabricated member formed by assembling a plurality of pavement prefabricated blocks can be used for paving high-grade roads and bridge floors, and the function of prefabricating the pavement is widened. The road surface prefabricated section can reduce the harm of the harmful gas of hot asphalt pavement to workers, and simultaneously saves the construction and health-preserving time of the cement mixture.)

1. The prefabricated pavement material is characterized in that raw materials of the prefabricated pavement material comprise graded broken stones and cementing materials, and the graded broken stones comprise the following components in percentage by weight: the passing rate of a 26.5mm sieve pore is 100%, the passing rate of a 19mm sieve pore is 81.5-88.5%, the passing rate of a 13.2mm sieve pore is 61.7-64.9%, the passing rate of a 9.5mm sieve pore is 49.6-50.1%, the passing rate of a 4.75mm sieve pore is 32.4-33.9%, the passing rate of a 2.36mm sieve pore is 21.5-22.0%, the passing rate of a 1.18mm sieve pore is 13.7-15.9%, the passing rate of a 0.6mm sieve pore is 9.5-10.5%, the passing rate of a 0.3mm sieve pore is 6.8-7.1%, the passing rate of a 0.15mm sieve pore is 4.9-5.9%, and the passing rate of a 0.075mm sieve pore is 3.9-4.0%.

2. The prefabricated pavement material as claimed in claim 1, wherein the cementing material comprises asphalt and additives, and the addition mass ratio of the graded broken stone, the asphalt and the additives is 93-95%: 4-6%: 1 to 2 percent; preferably, the additive is a high-strength epoxy resin; preferably, the asphalt is modified asphalt.

3. The prefabricated pavement material of claim 2, wherein the binder further comprises a modifying material, the modifying material being at least one of a styrene-butadiene-styrene triblock copolymer, a styrene-butadiene rubber polymer, a hydrogenated modified styrene-butene-styrene triblock copolymer, a hydrogenated modified styrene-hexene-styrene triblock copolymer, and a polypropylene wax;

preferably, the addition amount of the modifying material is 10 to 30% by mass in the asphalt.

4. The prefabricated pavement material of claim 3, wherein the prefabricated pavement material has a porosity of 12-25%; preferably, the prefabricated pavement material has a porosity of 20%.

5. The prefabricated pavement material of claim 2, wherein the compressive strength of the prefabricated pavement material is greater than 2.5MPa, the splitting strength of the prefabricated pavement material is greater than 1.3MPa, and the impact strength of the high-strength epoxy resin after hardening is greater than 61.24kJ/m²And the bending strength is more than 156.43 MPa.

6. A pavement preform block prefabricated from the prefabricated pavement material of any one of claims 1 to 5.

7. The pavement precast block according to claim 6, characterized in that the pavement precast block is prefabricated with a snap-lock structure;

preferably, the pavement precast block is prefabricated with at least one of the following structures: a keying projection and a keying female;

preferably, the embedded locking protrusion and the embedded locking concave part are provided with end faces which are in embedded fit with each other; preferably, the interlocking protrusion is a structure of a semi-cylinder, a prism, a circular truncated cone or a prismatic table protruding from the end face of the pavement precast block, and the interlocking concave part is a structure formed by a semi-cylinder, a prism, a circular truncated cone or a prismatic table longitudinally cutting one end face of the pavement precast block;

preferably, the length, the width and the height of the pavement precast block are 30-35cm, 20-45 cm.

8. The pavement precast block according to claim 6 or 7, wherein at least one drainage hole is preset in the pavement precast block, and the drainage hole penetrates through two sides of the pavement precast block;

preferably, the drainage holes are arranged in an up-and-down multilayer array, and the diameter of each drainage hole is 2-4 cm;

preferably, the pavement precast block comprises a lower precast block with a drain hole and an upper precast block without the drain hole, and a reinforcing bar is embedded in the lower precast block along the height direction and connected with the lower precast block and the upper precast block; preferably, the upper preform block has a porosity of 12 to 25%.

9. An asphalt pavement preform characterized by being assembled from a plurality of pavement preform blocks as claimed in any one of claims 6 to 8.

10. A method of constructing an asphalt pavement preform according to claim 9, comprising: and assembling the plurality of pavement precast blocks into an asphalt pavement precast member, wherein the strength of the paving foundation is more than 3 MPa.

Technical Field

The invention relates to the technical field of pavement prefabricated parts, in particular to a prefabricated pavement material, a pavement prefabricated block, an asphalt pavement prefabricated part and a construction method thereof.

Background

The existing prefabricated pavements are mainly divided into two types, one is an asphalt mixture prefabricated pavement and the other is a cement concrete prefabricated pavement. The asphalt mixture prefabricated pavement is an asphalt concrete block prefabricated by asphalt, stone and other additives, can be designed into different shapes, is formed by combination and assembly, and is similar to the existing asphalt pavement. The cement concrete prefabricated pavement is a concrete block prefabricated by cement mortar, stone and additives, can be designed into different shapes, and then is combined, assembled and molded, and is similar to the existing cement concrete pavement.

At present, the prefabricated pavement is mainly applied to non-driving lanes such as landscape lanes, residential roads, sidewalks and the like, and has a single function, the main reason is that the prefabricated pavement is extremely easy to break when being applied to motor vehicle lanes, and the whole use can be influenced after the prefabricated pavement is partially damaged. The existing prefabricated pavement can not meet the requirement of a high-grade highway for drainage.

In view of this, the invention is particularly proposed.

Disclosure of Invention

The invention aims to provide a prefabricated pavement material, a pavement prefabricated block, an asphalt pavement prefabricated member and a construction method thereof so as to solve the technical problems.

The invention is realized by the following steps:

the prefabricated pavement material comprises the following raw materials of graded broken stones and a cementing material, wherein the graded broken stones comprise the following components in percentage by weight: the passing rate of a 26.5mm sieve pore is 100%, the passing rate of a 19mm sieve pore is 81.5-88.5%, the passing rate of a 13.2mm sieve pore is 61.7-64.9%, the passing rate of a 9.5mm sieve pore is 49.6-50.1%, the passing rate of a 4.75mm sieve pore is 32.4-33.9%, the passing rate of a 2.36mm sieve pore is 21.5-22.0%, the passing rate of a 1.18mm sieve pore is 13.7-15.9%, the passing rate of a 0.6mm sieve pore is 9.5-10.5%, the passing rate of a 0.3mm sieve pore is 6.8-7.1%, the passing rate of a 0.15mm sieve pore is 4.9-5.9%, and the passing rate of a 0.075mm sieve pore is 3.9-4.0%. The sieve pores are square sieve pores.

The invention provides a prefabricated pavement material which is composed of graded broken stones and cementing materials with specific grading, and the graded broken stones ensure that a prefabricated pavement mixed material has enough gaps through scientific and reasonable grading design, realize internal drainage and have the effect of surface noise reduction. By adopting the grading composition, the prefabricated pavement mixed material has the porosity of 12-25%, so that rainwater on the prefabricated pavement can quickly seep down, the pavement can be quickly drained, and the driving safety in rainy days is guaranteed. In addition, the graded broken stones are firmly connected together through the cementing materials, so that the compressive strength and the splitting strength of the whole prefabricated pavement material are improved.

The precast block prepared by the precast pavement material has high strength and is not easy to break under large acting force, and the precast pavement can bear the repeated action of driving load, so that the precast block can be laid on a motor vehicle lane. In addition, the prefabricated pavement material with special grading design can also enable the prefabricated pavement to have sufficient porosity for drainage.

The passing rate under a specific sieve pore must be met, so that the prefabricated part prepared by the prefabricated material can be ensured to have enough gaps, the surface has enough structural depth, the sliding resistance and the noise reduction are realized, meanwhile, the rainwater can be ensured to rapidly permeate into the drain holes below the prefabricated block, and meanwhile, the integral strength of the prefabricated block cannot be greatly changed.

In a preferred embodiment of the application of the invention, the cementing material comprises asphalt and an additive, and the addition mass ratio of the graded broken stone, the asphalt and the additive is 93-95%: 4-6%: 1 to 2 percent. Preferably, the additive is a high strength epoxy resin. Preferably, the asphalt is a modified asphalt.

The graded broken stones are used for providing stress on a framework and a structure, and the asphalt and the high-strength epoxy resin are used as cementing materials, so that the graded broken stones form a whole, and the integrity between the graded broken stones is enhanced. The high-strength epoxy resin can improve the overall strength of the prefabricated pavement material.

In a preferred embodiment of the present invention, the cementing material further comprises a modifying material, wherein the modifying material is at least one of styrene-butadiene-styrene triblock copolymer, styrene-butadiene rubber polymer, hydrogenated modified styrene-butylene-styrene triblock copolymer, hydrogenated modified styrene-hexene-styrene triblock copolymer and polypropylene wax;

preferably, the addition amount of the modifying material is 10 to 30% by mass in the asphalt.

The grading design provided by the invention connects the prefabricated pavement materials together through good cementing materials, so that the prefabricated pavement mixed material can meet the basic requirements that the compressive strength is more than 2.5MPa and the splitting strength is more than 1.3 MPa.

In other embodiments, the modified material may be a modified material in modified asphalt, or may be a composite modified material for secondary modification of modified asphalt.

In a preferred embodiment of the present invention, the above-mentioned prefabricated pavement material has a porosity of 12-25%, and preferably, the prefabricated pavement material has a porosity of 20%. At the above porosity, internal drainage and surface noise reduction can be satisfied.

In the preferred embodiment of the present invention, the cured high-strength epoxy resin has an impact strength of greater than 61.24kJ/m²Bending strengthGreater than 156.43 MPa. The high-strength epoxy resin meeting the above conditions is helpful for improving the overall durability of the prefabricated pavement material.

A pavement precast block is prepared by prefabricating the precast pavement material.

In a preferred embodiment of the present invention, the road surface precast block is prefabricated with an interlocking structure;

preferably, the pavement precast block is prefabricated with at least one of the following structures: a keying projection and a keying female;

preferably, the interlocking projection and the interlocking concave part are provided with end faces which are in embedded fit with each other; preferably, the interlocking protrusion is a structure of a semi-cylinder, a prism, a round table or a prismatic table protruding on the end face of the pavement precast block, and the interlocking concave part is a structure formed by one end face of the semi-cylinder, the prism, the round table or the prismatic table longitudinal section pavement precast block;

preferably, the length, width and height of the pavement precast block are 30-35cm, 20-45 cm.

Size of common modified asphalt mix: the length is between 5m and 20m, the width is between 1m and 5m, and the thickness is between 0.01m and 0.05 m. The large-size precast block cannot bear the repeated action of the load of the travelling crane and is easy to break. The invention provides a prefabricated block with smaller size and more reasonable size. This prefabricated section can the effective dispersion driving load effort, and the test block has the interlocking structure, and the whole linkage is effectual after the shop, and the atress is even, has more excellent road performance. The pavement structures have the best mutual embedding effect and the stress concentration is the minimum. The invention has reasonable size design, and avoids local damage caused by stress concentration and influence on integral use.

The pavement precast block provided by the invention can be applied to tunnels and other airtight spaces with unsmooth air exhaust, can reduce the harm of harmful gas generated by hot asphalt pavement to workers, and simultaneously saves the construction and health-preserving time of cement mixture.

The interlocking structure is not limited to the above-described structure, and the shape of the interlocking structure may be adjusted as necessary in other embodiments.

In one embodiment, the two ends of one road surface prefabricated block are respectively provided with an embedded locking protrusion and an embedded locking concave part, one end of one road surface prefabricated block is provided with the embedded locking protrusion, the other end of the one road surface prefabricated block is provided with a plane, in other embodiments, one end of the one road surface prefabricated block is provided with the embedded locking concave part, and the other end of the one road surface prefabricated block is provided with the plane.

Preferably, when the two ends of one pavement precast block are respectively provided with the interlocking protrusions and the interlocking concave parts, the interlocking protrusions and the interlocking concave parts are arranged alternately, adjacently or oppositely.

In a preferred embodiment of the present invention, at least one drainage hole is preset in the road surface precast block, and the drainage hole penetrates through two sides of the road surface precast block;

preferably, the drainage holes are arranged in an upper and lower multi-layer array, and the diameter of the drainage holes is 2-4 cm.

Through the prefabricated drain hole, rainwater on the road surface can conveniently seep down to the drain hole from the pores of the prefabricated block and further be drained outwards from the drain hole. The size of the downward drainage pore canal is consistent, the diameter is 2-4cm, the stress influence on the prefabricated member is minimal under the size, and the drainage effect is good.

In addition, the diameter of the drainage pore canal provided by the invention is in a range of 2-4cm, and drainage pore canals with different diameters can be arranged according to the precipitation in different areas.

In other embodiments, the drain holes can be vertically distributed in space, so that accumulated water on the road surface can be drained quickly from multiple directions. The inventor practice proves that the road surface precast block provided by the invention can effectively remove the road surface rainwater and ensure the driving safety when the precipitation intensity is that the precipitation (mm) is less than 300mm in 20 hours and the precipitation (mm) is less than 170mm in 12 hours.

The surface structure of the precast block provided by the invention has the same surface structure as a noise-reducing road surface through special grading design, so that the noise of driving can be effectively reduced by 30-40%.

The pavement precast block comprises a lower precast block with a drain hole and an upper precast block without the drain hole, and the lower precast block is embedded with a reinforcing bar along the height direction, and the reinforcing bar is connected with the lower precast block and the upper precast block; preferably, the upper preform block has a porosity of 12-25%.

During preparation, the lower prefabricated block is preferentially formed, the reinforcing bars are embedded in the lower prefabricated block in advance, and then the prefabricated block is poured. The ribbing may be steel or a chemical material. In order to prevent the hidden danger of the durability of the precast block, the lower precast block is arranged to adopt a thinner mixture, and the requirement of drainage is met. The particle size of the upper precast block is unchanged, the existing grading is adopted, so that the stability of the lower precast block is better, and meanwhile, the upper precast block can drain water and reduce noise.

An asphalt pavement prefabricated member is formed by installing a plurality of pavement prefabricated blocks. The asphalt pavement prefabricated member is formed by assembling a plurality of pavement prefabricated blocks in a matching way through an interlocking structure.

A construction method of an asphalt pavement prefabricated member comprises the following steps: the plurality of pavement precast blocks are assembled into the asphalt pavement precast member, the strength of the pavement foundation is set to be more than 3MPa, and the flatness of the pavement foundation meets the requirement of the acceptance standard of highway construction. Under the requirements of the strength and the flatness of the paved foundation, the actual highway construction requirements can be met.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a prefabricated pavement material, a pavement prefabricated block, an asphalt pavement prefabricated member and a construction method thereof. The prefabricated pavement material is composed of graded broken stones with specific grading and cementing materials, and the graded broken stones ensure that the prefabricated pavement mixed material has enough gaps through scientific and reasonable grading design, so that internal drainage is realized, and the noise of the road surface is reduced. By adopting the grading composition, the prefabricated pavement mixed material has the porosity of 12-25%, so that rainwater on the prefabricated pavement can quickly seep down, the pavement can be quickly drained, and the driving safety in rainy days is guaranteed. In addition, the graded broken stones are connected together through the cementing materials, so that the compressive strength and the splitting strength of the prefabricated pavement material meet the requirements of traveling.

The precast block prepared by the precast pavement material has the advantage of high strength, can bear the repeated action of the load of a vehicle, and can be paved on a motor vehicle lane. The asphalt pavement prefabricated member formed by assembling a plurality of pavement prefabricated blocks can be used for paving high-grade roads and bridge floors, and the function of prefabricating the pavement is widened.

Can improve the efficiency of construction through bituminous paving prefab, can use in the airtight space that airs exhaust unsmooth such as tunnel, can reduce the harmful gas that hot asphalt paved to workman's harm, saved cement mixture construction health preserving time simultaneously.

In addition, the invention also provides a construction method of the asphalt pavement prefabricated member, and the construction method can meet the requirement of the existing highway construction acceptance standard.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a pavement precast block provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of an asphalt pavement preform provided in example 1 of the present invention;

fig. 3 is a schematic structural diagram of a pavement precast block provided in embodiment 2 of the present invention.

Icon: 100-pavement precast block; 110-interlocking projections; 120-a female interlocking member; 130-a drain hole; 140-ribbed.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when in use, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.