Semi-flexible base material and production method thereof

It is a base material and semi-flexible technology, which is applied to the coagulation pavement, roads, buildings and other directions of on-site paving. The effect of preventing road reflection cracks and low temperature sensitivity

Inactive Publication Date: 2010-10-20
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production method of this material is complicated and the cost is high, so this semi-flexible base material is not widely used, and it has not been further researched and applied in the field of pavement technology

Method used

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  • Semi-flexible base material and production method thereof
  • Semi-flexible base material and production method thereof
  • Semi-flexible base material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Composition formula of semi-flexible base material:

[0030] Aggregate 91%

[0031] Cement 5%

[0032] SBS modified emulsified asphalt 4%

[0033] Preparation method of semi-flexible base material:

[0034] According to the composition formula, adopt figure 1 Described preparation method flow process

[0035] Firstly dry mix cement and stone evenly, add water and stir, then add SBS modified emulsified asphalt and mix evenly to obtain semi-flexible base material.

[0036] Properties of semi-flexible base material:

[0037] Failure strain ε(%): 2.28

[0038] Unconfined compressive strength Rc (MPa): 2.6

Embodiment 2

[0040] Composition formula of semi-flexible base material:

[0041] Aggregate 88%

[0042] Cement 6%

[0043] SBS modified emulsified asphalt 6%

[0044] Preparation method of semi-flexible base material:

[0045] According to the composition formula, adopt figure 1 Described preparation method:

[0046] a) Dry the aggregate and cement for later use.

[0047] b) Dry mix cement and aggregate evenly, add water and stir, then add SBS modified emulsified asphalt and mix evenly to obtain a semi-flexible base material.

[0048] Properties of semi-flexible base material:

[0049] Failure strain ε(%): 2.27

[0050] Unconfined compressive strength Rc (MPa): 1.6

Embodiment 3

[0052] Composition formula of semi-flexible base material:

[0053] Aggregate 89%

[0054] Cement 7%

[0055] SBS modified emulsified asphalt 4%

[0056] Preparation method of semi-flexible base material:

[0057] According to the composition formula, adopt figure 1 Described preparation method:

[0058] a) Dry the aggregate and cement for later use.

[0059] b) Dry mix cement and aggregate evenly, add water and stir, then add SBS modified emulsified asphalt and mix evenly to obtain a semi-flexible base material.

[0060] Properties of semi-flexible base material:

[0061] Failure strain ε(%): 2.58

[0062] Unconfined compressive strength Rc (MPa): 2.5

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Abstract

The invention provides a semi-flexible base material and a production method thereof, which belong to the technical field of modification and emulsification engineering, and comprises the following components by weight percent: 90-95% of aggregate, 3-8% of cement and 2-16% of SBS modified and emulsified asphalt. The production method comprises the following steps of: after firstly dry mixing the cement and stones uniformly, adding water and SBS modified and emulsified asphalt to stir, and after uniform mixing, obtaining the semi-flexible base material. The invention is better than rigid base material and flexible base material, compound produced by the using the semi-flexible base material has good permanent deformation resistance, improves the initial strength of semi-rigid base material and shortens the time for forming the strength, simultaneously increases the flexibility through adding emulsified asphalt, takes the advantage of asphalt and cement base stabilizing performance to make up the shortage, has appropriate rigidity, higher strength, smaller temperature sensitivity and better low temperature crack resistance, and decreases and prevents the base from cracking, and thereby preventing roads from reflection crack, playing good road use performance, and prolonging the service lives of the roads.

Description

technical field [0001] The invention belongs to the technical field of modern pavements, in particular to a modified asphalt material for road construction, in particular to a semi-flexible base material and a preparation method of SBS modified emulsified asphalt in the base. technical background [0002] Add SBS modified emulsified asphalt to the semi-rigid base material to improve the reflective cracks of the asphalt surface layer caused by temperature shrinkage and humidity shrinkage on the semi-rigid base pavement to obtain a semi-flexible base, which can keep part of the deformation capacity of the asphalt mixture and strain relaxation ability, and has the advantages of high rigidity of semi-rigid base, good plate performance, strong anti-deformation ability, and low cost. [0003] Semi-flexible base materials have been studied at home and abroad, such as "C-ETM semi-flexible base asphalt pavement mix ratio design and construction)" in "Maintenance Machinery & Construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/26C04B28/00
Inventor 吴旷怀李丹李燕枫杨国良
Owner GUANGZHOU UNIVERSITY
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