CN201077944Y

CN201077944Y - Roads surface

Info

Publication number: CN201077944Y
Application number: CNU2007201047706U
Authority: CN
Inventors: 吴永芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-05
Filing date: 2007-07-05
Publication date: 2008-06-25
Anticipated expiration: 2017-07-05

Abstract

The utility model relates to a road pavement, in particular a rolled cement concrete pavement. The road pavement is characterized in that the pavement mainly comprises an economic concrete base layer and a rolled cement concrete surface layer, the base layer and the surface layer are shaped and combined through one-step rolling, wherein, the thickness of the base layer is 60-80 percent of the overall thickness of the pavement, and the thickness of the surface layer is 20-40 percent thereof. Because the thickness of both the base layer and the surface layer are paved according to design requirements, the road usage performance of the road can meet the requirements, and is completely suitable for different utilization demands on roads in counties, villages and towns. In addition, because the road made of mixed material structurally adopts only an economic concrete base layer and a dry hard cement concrete surface layer which are shaped through one-step rolling, the road structure is simple, and the cost is low.

Description

A kind of pavement of road

Technical field

The utility model relates to a kind of pavement of road, is specifically related to a kind of cement concrete pavement that rolls.

Background technology

At present, road traffic route structure both domestic and external generally is made up of bed course, basic unit and surface layer from top to bottom, or only is made up of basic unit and surface layer.Wherein, basic unit is generally the cement stabilized macadam layer, and surface layer then develops into composite pavement by single cement concrete pavement.Composite pavement comprises two big classes, i.e. cement concrete (CC) and cement concrete (CC) composite pavement and cement concrete (CC) and bituminous concrete (AC) composite pavement.Composite pavement is made up of two-layer or two-layer above surface layer, wherein, cement concrete combined type (CC-CC) comprises the PCC-PCC formula, be lower floor with economic concrete (not in full conformity with the local material of code requirement, make the stable adhesion material as flyash, slag cements, lime etc., do to gather materials with walk about stone, rubble, the grains of sand) making, the upper strata also claims the EPCC-PCC formula with specification concrete high-strength, wear-resisting, antiskid; Also comprise ERCC-PCC formula and RCC-PCC formula, promptly lower floor is with roller compacted concrete or economic roller compacted concrete, and the upper strata is with specification concrete high-strength, wear-resisting, antiskid.When paving the way construction, bed course, basic unit, the independent construction of each layer of surface layer, the generally also independent construction of each interlayer of composite cover.Because the initial setting time of cement concrete is about 2 hours, about 4 hours of final setting time, and the engineering time of each interlayer is at interval considerably beyond final setting time, so when paving last layer, though adopt measures such as to descend layer of surface plucking or watering mud layer, but interlayer is bonding still undesirable, so, between basic unit and the surface layer, connection (or bonding) between each of composite pavement layer is insecure, when the phenomenon, particularly surface course that occurs throwing off easily approaches, under the pressure of vehicle, be easy to generate reflection crack, above-mentioned two kinds of situations all cause the damage on road surface, and the road surface needs often maintenance, maintenance costs height.In addition, thicker in the gross thickness of bed course, basic unit and surface layer, when particularly the thickness of surface layer was thick more, the cost of road was high more.China is at present aspect communications and transportation, just implementing village village strategy accessible by road, and current country is still not rich, have quite modest financial resources, in the highway design, it is crucial selecting the road structure and the road structure of economical rationality, leads to the township for secondary following road, particularly county town, between township and the township, the township leads to the village, the highway between village and the village, because of vehicle travel speed thereon far below speedway, national highway, provincial highway, and remove the minority road the heavier load bearing requirements and the traffic volume big slightly (hundreds of times/days) are arranged, thereby outside the bending tensile strength of road and compressive strength had relatively high expectations, other most roads were because its daily traffic volume is little, generally only were below hundred times/day the order of magnitude, its load is generally below the Light-duty Vehicle, as car, minicar, light bus, pickup truck etc., as selecting the RCC-AC road surface, obviously also uneconomical.At above-mentioned situation, satisfying road to load bearing requirements, promptly satisfy intensity, under the prerequisite of antiskid, durable and necessary pavement performances such as planeness, in conjunction with the instructions for use of the following road in various places county and the reality of the local resource of building the road, with alap expense, the more road of making is a problem demanding prompt solution.

Summary of the invention

Purpose of the present invention, be satisfying the load-bearing requirement, promptly satisfy under the prerequisite that pavement performances such as the working strength, antiskid of road, durable and appropriate planarization require, make full use of local resource, provide a kind of and be suitable for below the requirement of secondary road surface, especially for intercommunication between county and county, or Xian Tong township, country's intercommunication, intercommunication between logical village, township and village, and the cheap road of construction price.

The object of the present invention is achieved like this: this pavement of road, mainly by economic concrete base course with roll Portland Cement Concrete Surface Course and form, it is basic unit and surface layer road surface by a roller-compaction combination, wherein, the thickness of basic unit accounts for the 60%-80% of total thickness of pavement, and the thickness of surface layer accounts for the 20%-40% of total thickness of pavement.

Preferred pavement of road rolls the 20%-33% that Portland Cement Concrete Surface Course thickness accounts for gross thickness, and economic concrete base course thickness accounts for the 67%-80% of gross thickness.This pavement of road also can be laid one deck bed course in the bottom of basic unit.

Because the thickness of this pavement of road basic unit is all laid by designing requirement with the thickness of surface layer, the pavement performance on old course road can meet the demands, the difference use needs of road between suitable fully county, township, village.Owing to only adopt economic concrete base course and dry rigid cement concrete surface layer on the road structure, and roller-compaction, the old course line structure is simple, with low cost, basic unit is complete, good with combining of surface layer, the phenomenon that interlayer is thrown off can not occur, save the adhesion thing that common interlayer need add, further reduce the later maintenance expense of cost and road.In road construction, can make full use of local resource, particularly flyash, slag cements, lime, carbide slag, copper mine slag, gravel etc., more favourable to saving cost.

Description of drawings

Fig. 1 is vertical sectional structure schematic diagram of the present utility model

The specific embodiment

Be that example is described further the utility model in conjunction with the accompanying drawings with the actual tests road below:

The black Qiao Mu village of making Kunming Xishan District highway in 2006, the long 1.4km in road, wide 3.5m, total thickness of pavement 20cm, economic concrete base course 2 is the cement stabilized macadam base of 15cm, wherein part has adopted the gravel of flyash and quarry, the roller compacted concrete surface layer 1 of upper berth 5cm, basic unit combines by a roller-compaction with surface layer, on the same road section surface of the basic unit of roller-compaction and surface layer, can repeatedly roll.Cost is 27 yuan/m, and 9.45 ten thousand yuan of every kilometer costs are the most economical road surfaces of domestic present cost, uses and has a surplus in 1 year so far, and is still excellent.

Claims

1. pavement of road, the road structure that it is characterized in that this road is mainly by economic concrete base course (2) with roll Portland Cement Concrete Surface Course (1) and form, it is basic unit and surface layer road surface by a roller-compaction combination, wherein, the thickness of basic unit (2) accounts for the 60%-80% of total thickness of pavement, and the thickness of surface layer (1) accounts for the 20%-40% of total thickness of pavement.

2. a kind of pavement of road as claimed in claim 1 is characterized in that the described this 20%-33% that Portland Cement Concrete Surface Course (1) thickness accounts for gross thickness that rolls, and economic concrete base course (2) thickness accounts for the 67%-80% of gross thickness.

3. a kind of pavement of road as claimed in claim 1 or 2 is characterized in that one deck bed course is also laid in the bottom of described economic concrete base course (2).