CN102535297A - Polypropylene fiber concrete roadway structure suitable for large-tonnage cars and construction method - Google Patents
Polypropylene fiber concrete roadway structure suitable for large-tonnage cars and construction method Download PDFInfo
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- CN102535297A CN102535297A CN2012100097811A CN201210009781A CN102535297A CN 102535297 A CN102535297 A CN 102535297A CN 2012100097811 A CN2012100097811 A CN 2012100097811A CN 201210009781 A CN201210009781 A CN 201210009781A CN 102535297 A CN102535297 A CN 102535297A
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Abstract
The invention relates to a polypropylene fiber concrete roadway structure suitable for large-tonnage cars and a construction method; the road structure is characterized in that the road structure comprises a decayed rock roadbed, a roadbed strengthening grouting material, a lean concrete layer and a polypropylene fiber concrete surface layer from bottom to top; and the construction method comprises the following steps of: a. cleaning and tamping the decayed rock roadbed; b. strengthening the decayed rock roadbed by adopting the roadbed strengthening grouting material, wherein the thickness of the grouting material is 5-10cm, and the embedded depth of the grouting material is 2-3cm; c. paving the lean concrete layer with the thickness being 40-60cm, and then compacting; d. paving the polypropylene fiber concrete surface layer with the thickness being 40-60cm; and e. maintaining to complete construction. In the invention, the polypropylene fiber concrete surface layer is adopted to replace a mud-combined graded crushed rock roadway to effectively improve the bending tensile strength of the roadway, besides, the polypropylene fiber concrete roadway structure has high elongation ultimate and good alkali resistance, and overcomes the disadvantages of low tensile strength, low elongation ultimate and brittleness of cement, mortar and concrete.
Description
Technical field
The invention belongs to highway cement concrete pavement structure and job practices technical field, relate in particular to a kind of polypropylene fiber concrete road structure and job practices of suitable large-tonnage automobile.
Background technology
In the strip mining transformation of mine, for improving conevying efficiency, improve production capacity, the transportation of large-tonnage automobile is generally adopted, and particularly carload is wider in 300-360 ton range applications.The fixedly highway of stope, refuse dump is general mud knot and graded broken stone road surface now, and the road surface standard is lower, and cost of transportation is bigger.At present the cement concrete pavement maximum load that generally adopts of traffic department is 55 tons in an automobile, and structure is three layers in surface layer, articulamentum and a basic unit, that is: (1) surface layer is the C30-40 cement concrete, thickness 20-30cm; (2) articulamentum is a cement stabilized macadam, thickness 15-20cm; (3) basic unit is a local material, generally adopts materials such as rubble, Stabilized Soil, and thickness 15-20cm, this road structure under the effect of 300-360 ton carload phenomenons such as the fracture of plate face, breakage and subgrade settlement will take place directly, causes the whole destruction of road structure.
Highway under 300 tons of carload effects is copper mine South Mountain 1 in the Dexing only at present
#The barren rock tunnel is tested, and sees mining industry wall bulletin 18 phases of September in 2000 " mining electric automobile rigid pavement is repaired and put into practice " and mining industry wall bulletin 9 phases of September in 2003 " compound rigid pavement mechanical test and failure mechanism analysis " for details, and this road structure is following: the road surface is compound rigid pavement; Divide three layers; (1) bed course: adopt the C20 ordinary concrete directly to be cast on the basement rock, do not have scum silica frost on the basement rock, Concrete Thick 30cm; (2) basic unit: adopt C40 steel concrete φ 16 screw-thread steels; Two way system, net degree 150 * 200, Concrete Thick 30cm.(3) surface layer: the C40 steel fibrous concrete is built; The steel fibre specification is 0.2mm * 0.3mm * (25～35) mm; Volume volume ratio 2%; This thick layer by layer 20cm, not enough below this road structure exists: (1) maximum test car load is below 300 tons, can not satisfy the requirement of going of 360 tons of carloads; (2) the road surface cost reaches 1000 yuan/m
2, the large-scale promotion difficulty; (3) roadbed is a basement rock, and use face is narrow; (4) facing concrete is C40, and bending tensile strength is merely 4.37Mpa, is not high-grade concrete.
Summary of the invention
The purpose of this invention is to provide that a kind of road structure bending tensile strength is high, abrasion resistance is good and the polypropylene fiber concrete road structure of the suitable large-tonnage automobile that grow service life.
A further object of the present invention provides a kind of job practices of polypropylene fiber concrete road structure of suitable large-tonnage automobile.
The present invention seeks to realize like this through following technical scheme.
The present invention is suitable for the polypropylene fiber concrete road structure of large-tonnage automobile; It is characterized in that comprising decomposed rock roadbed, roadbed strengthening grouting material, poor concrete layer and polypropylene fiber concrete surface layer from bottom to top; The paving thickness of described poor concrete layer is 40-60cm, described polypropylene fiber concrete surface thickness 40-60cm.
The used concrete grade of described polypropylene fiber concrete surface layer is C60-C80, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380-480kg/m
3
Flyash: 40-60kg/m
3
Slag micropowder: 40-60 kg/m
3
Water: 130-140 kg/m
3
Sand: 30-36 kg/m
3
Rubble: 1250-1160 kg/m
3
Water reducing agent 2-2.3 kg/m
3
Polypropylene fibre: 5.4-10.8kg/m
3
Described water reducing agent is a polycarboxylate high performance water-reducing agent.
A kind of job practices of polypropylene fiber concrete road structure of suitable large-tonnage automobile is characterized in that comprising the following steps:
A, the decomposed rock roadbed is cleared up, tamped;
B, employing roadbed strengthening grouting material carry out reinforcement to the decayed rock roadbed, its grouting material thickness 5-10cm, insert depth 2-3cm;
C, the poor concrete layer that paves are with poor concrete layered material paving thickness 40-60cm, compacting then;
D, laying polypropylene fiber concrete surface layer are made polypropylene fiber concrete, and it is C60-C80 that its polypropylene fibre coagulates the used concrete grade of soil, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380-480kg/m
3
Flyash: 40-60kg/m
3
Slag micropowder: 40-60 kg/m
3
Water: 130-140 kg/m
3
Sand: 30-36 kg/m
3
Rubble: 1250-1160 kg/m
3
Polycarboxylate high performance water-reducing agent 2-2.3 kg/m
3
Polypropylene fibre: 5.4-10.8kg/m
3
With evenly paving into the polypropylene fiber concrete surface layer that thickness is 40-60cm after the above-mentioned raw materials stirring;
E, carry out maintenance, accomplish construction.
Advantage of the present invention is:
Because the present invention adopts roadbed strengthening grouting material that the decayed rock roadbed is carried out reinforcement in the pavement construction process; And thickeied the thickness of poor concrete layer and polypropylene fiber concrete surface layer; Its surface thickness 40-60cm is more than the thick 20-30cm of general rigid pavement 20-30cm; And surface layer adopts special polypropylene fiber concrete, and the tensile strength that has improved the road surface effectively is high, and limit elongation is big, alkali resistance is good.
Through checking:
(1) surface layer adopts polypropylene fiber concrete, and its concrete tensile strength is brought up to more than the 10-12 Mpa by the 5Mpa of ordinary concrete, satisfies the instructions for use under the effect of 300-360 large-tonnage carload;
(2) basic unit adopts poor concrete, and its modulus of elasticity is brought up to 10000Mpa by the 3000Mpa of cement stabilized macadam, satisfies the transmission of exerting oneself in the effect of 300-360 large-tonnage carload and the requirement of diffusion;
(3) the decomposed rock subgrade resilient modulus after the reinforcement of grouting material reaches more than 550 Mpa, can satisfy in the effect of 300-360 large-tonnage carload exert oneself to transmit, the requirement of diffusion and sedimentation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in Figure 1; The polypropylene fiber concrete road structure of suitable large-tonnage automobile of the present invention; It is characterized in that comprising decomposed rock roadbed 4, roadbed strengthening grouting material 2, poor concrete layer 3 and polypropylene fiber concrete surface layer 1 from bottom to top; The paving thickness of described poor concrete layer 2 is 40-60cm, described polypropylene fiber concrete surface layer 1 thickness 40-60cm.
Described polypropylene fiber concrete surface layer 1 used concrete grade is C60-C80, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380-480kg/m
3
Flyash: 40-60kg/m
3
Slag micropowder: 40-60 kg/m
3
Water: 130-140 kg/m
3
Sand: 30-36 kg/m
3
Rubble: 1250-1160 kg/m
3
Water reducing agent 2-2.3 kg/m
3
Polypropylene fibre: 5.4-10.8kg/m
3
Described water reducing agent is a polycarboxylate high performance water-reducing agent.
The present invention is suitable for the job practices of the polypropylene fiber concrete road structure of large-tonnage automobile, comprises the following steps:
A, the decomposed rock roadbed is cleared up, tamped; Decomposed rock roadbed of the present invention: be meant that the phenomenon of broken, loose and the secondary variation of mineralogical composition appears in rock under solar radiation, atmosphere, water and biological agent.Cause the effect of above-mentioned phenomenon to claim weathering, this decayed rock is directly used as roadbed, be referred to as the decomposed rock roadbed.
B, employing roadbed strengthening grouting material carry out reinforcement to the decayed rock roadbed, its grouting material thickness 5cm, insert depth 2cm; Its grouting material is prior art: be with high-strength material as aggregate, as binding material, it is formulated to be aided with materials such as upper flow regime, microdilatancy, anti-segregation with cement.It adds a certain amount of water of people at the construction field (site), can use after stirring.It is good that grouting material has a self drainage, fast hard, early strong, high-strength, do not have shrink, microdilatancy; Nontoxic, harmless, not aging, pollution-free to water quality and surrounding environment, from characteristics such as close property are good, antirust.The decayed rock roadbed is carried out reinforcement, and to satisfy under the effect of large-tonnage carload, to the specific (special) requirements of roadbed, after the reinforcement, subgrade resilient modulus reaches more than the 550Mpa.
C, the poor concrete layer that paves, the paving thickness of its poor concrete layer is 40-60cm, compacting then;
Poor concrete: be by thick, fine aggregate and (thick, fine aggregate is than row 90%; 32.5 a kind of material that cement 10% (weight ratio) cement and water are formulated; Its intensity reaches 10000Mpa, is much higher than semi-rigid sub-base material such as two grey stable granulates, cement stabilized macadam.Poor concrete has higher strength and stiffness, and water stability is good, erosion resistibility is strong.Poor concrete is because cementitious matter content is few, and void content is generally bigger, helps the discharging of interfacial water.Poor concrete can relax the inhomogeneous deformation of soil matrix, can eliminate the adverse effect of road pavement.In addition, the cement that poor concrete can also utilize the stall that occupies a narrow space to produce also can use the locality of substandard to gather materials.
D, laying polypropylene fiber concrete surface layer are made polypropylene fiber concrete, and it is C60-C80 that its polypropylene fibre coagulates the used concrete grade of soil, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380kg/m
3
Flyash: 50kg/m
3
Slag micropowder: 50 kg/m
3
Water: 130 kg/m
3
Sand: 30 kg/m
3
Rubble: 1250 kg/m
3
Polycarboxylate high performance water-reducing agent 2.2 kg/m
3
Polypropylene fibre: 5.4kg/m
3
After above-mentioned raw materials stirred, paving into thickness was the polypropylene fiber concrete surface layer of 40-60cm, compacting;
E, carry out maintenance, accomplish construction.
Generally call regular tenacity grade concrete to C10--C50, the C60--C90 strength grade is a strong concrete, the above super high strength concrete of claiming of C100.
Polypropylene fiber concrete surface layer of the present invention: the composite material that has adopted cement base-material, flyash, slag micropowder, sand, rubble, polypropylene fibre and high-performance water reducing agent to form; The tensile strength that has improved the road surface effectively is high; And limit elongation is big, alkali resistance is good, shortcoming such as overcome cement stone, mortar and concrete tensile strength is low, limit elongation is little, property is crisp.
Embodiment
The concrete weight proportion of every cubic metre of label C60 of raw material that polypropylene fiber concrete surface layer of the present invention is used is:
Cement: 52.5# cement 380kg/m
3
Flyash: 50kg/m
3
Slag micropowder: 50 kg/m
3
Water: 130 kg/m
3
Sand: 30 kg/m
3
Rubble: 1250 kg/m
3
Polycarboxylate high performance water-reducing agent 2.2 kg/m
3
Polypropylene fibre: 5.4kg/m
3
The present invention adopts high-strength wearable polypropylene fiber concrete road structure to substitute mud knot and graded broken stone road surface; Thereby reach the purpose that improves whole pavement structural strength; The employing of above-mentioned road structure; Can improve the road surface standard of existing mine large-tonnage running car greatly, reduce cost of transportation and reduce road maintenance expense purpose thereby reach.
Claims (5)
1. the polypropylene fiber concrete road structure of a suitable large-tonnage automobile; It is characterized in that comprising decomposed rock roadbed, roadbed strengthening grouting material, poor concrete layer and polypropylene fiber concrete surface layer from bottom to top; The paving thickness of described poor concrete layer is 40-60cm, described polypropylene fiber concrete surface thickness 40-60cm.
2. the polypropylene fiber concrete road structure of suitable large-tonnage automobile according to claim 1 is characterized in that the used concrete grade of described polypropylene fiber concrete surface layer is C60-C80, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380-480kg/m
3
Flyash: 40-60kg/m
3
Slag micropowder: 40-60 kg/m
3
Water: 130-140 kg/m
3
Sand: 30-36 kg/m
3
Rubble: 1250-1160 kg/m
3
Water reducing agent 2-2.3 kg/m
3
Polypropylene fibre: 5.4-10.8kg/m
3
3. the polypropylene fiber concrete road structure of suitable large-tonnage automobile according to claim 1 is characterized in that described water reducing agent is a polycarboxylate high performance water-reducing agent.
4. the polypropylene fiber concrete road structure of suitable large-tonnage automobile according to claim 1 is characterized in that the concrete weight proportion of every cubic metre of label C60 of raw material that described polypropylene fiber concrete surface layer is used is:
Cement: 52.5# cement 380kg/m
3
Flyash: 50kg/m
3
Slag micropowder: 50 kg/m
3
Water: 130 kg/m
3
Sand: 30 kg/m
3
Rubble: 1250 kg/m
3
Polycarboxylate high performance water-reducing agent 2.2 kg/m
3
Polypropylene fibre: 5.4kg/m
3
5. the job practices of the polypropylene fiber concrete road structure of any described suitable large-tonnage automobile of claim 1-4 is characterized in that comprising the following steps:
A, the decomposed rock roadbed is cleared up, tamped;
B, employing roadbed strengthening grouting material carry out reinforcement to the decayed rock roadbed, its grouting material thickness 5-10cm, insert depth 2-3cm;
C, the poor concrete layer that paves are with poor concrete layered material paving thickness 40-60cm, compacting then;
D, laying polypropylene fiber concrete surface layer are made polypropylene fiber concrete, and it is C60-C80 that its polypropylene fibre coagulates the used concrete grade of soil, and every cubic metre of weight proportion of its raw material is:
Cement: 52.5# cement 380-480kg/m
3
Flyash: 40-60kg/m
3
Slag micropowder: 40-60 kg/m
3
Water: 130-140 kg/m
3
Sand: 30-36 kg/m
3
Rubble: 1250-1160 kg/m
3
Polycarboxylate high performance water-reducing agent 2-2.3 kg/m
3
Polypropylene fibre: 5.4-10.8kg/m
3
With evenly paving into the polypropylene fiber concrete surface layer that thickness is 40-60cm, compacting after the above-mentioned raw materials stirring;
E, carry out maintenance, accomplish construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210009781.1A CN102535297B (en) | 2012-01-13 | 2012-01-13 | Polypropylene fiber concrete roadway structure suitable for large-tonnage cars and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210009781.1A CN102535297B (en) | 2012-01-13 | 2012-01-13 | Polypropylene fiber concrete roadway structure suitable for large-tonnage cars and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102535297A true CN102535297A (en) | 2012-07-04 |
| CN102535297B CN102535297B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210009781.1A Active CN102535297B (en) | 2012-01-13 | 2012-01-13 | Polypropylene fiber concrete roadway structure suitable for large-tonnage cars and construction method |
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| CN (1) | CN102535297B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236863A (en) * | 2015-09-16 | 2016-01-13 | 长安大学 | Expansive type high-fluidity cement-base pavement slip-casting reinforcing material and preparation method thereof |
| CN108589460A (en) * | 2018-03-29 | 2018-09-28 | 机械工业第六设计研究院有限公司 | A kind of pavement structure way for tracked engineering vehicle test site |
| CN113149552A (en) * | 2021-04-15 | 2021-07-23 | 王逵 | Polypropylene fiber concrete and production process thereof |
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| CN1580407A (en) * | 2003-08-15 | 2005-02-16 | 深圳市海川实业股份有限公司 | Fiber-mixed cement-concrete road surface |
| KR100812751B1 (en) * | 2006-11-15 | 2008-03-12 | 백성호 | Water permeable concrete pavement structure and construction method thereof |
| CN201165626Y (en) * | 2008-02-28 | 2008-12-17 | 葛加君 | Novel polypropylene asphalt pavement |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2344425Y (en) * | 1998-07-24 | 1999-10-20 | 孙学高 | Upper and lower sandwiched steel fibre concrete road slab |
| CN1580407A (en) * | 2003-08-15 | 2005-02-16 | 深圳市海川实业股份有限公司 | Fiber-mixed cement-concrete road surface |
| KR100812751B1 (en) * | 2006-11-15 | 2008-03-12 | 백성호 | Water permeable concrete pavement structure and construction method thereof |
| CN201165626Y (en) * | 2008-02-28 | 2008-12-17 | 葛加君 | Novel polypropylene asphalt pavement |
Non-Patent Citations (1)
| Title |
|---|
| 张永利: "重载作用下高抗折强度水泥混凝土设计方法研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236863A (en) * | 2015-09-16 | 2016-01-13 | 长安大学 | Expansive type high-fluidity cement-base pavement slip-casting reinforcing material and preparation method thereof |
| CN108589460A (en) * | 2018-03-29 | 2018-09-28 | 机械工业第六设计研究院有限公司 | A kind of pavement structure way for tracked engineering vehicle test site |
| CN113149552A (en) * | 2021-04-15 | 2021-07-23 | 王逵 | Polypropylene fiber concrete and production process thereof |
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| Publication number | Publication date |
|---|---|
| CN102535297B (en) | 2014-03-12 |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |