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A pavement base molding method using aeolian sand as raw material

A pavement base layer and forming method technology, which can be applied to cohesive pavement paved on site, roads, roads, etc., can solve the problems of shortage of sand and gravel raw materials, high price, high engineering cost, etc., and achieve reduced engineering cost and frost resistance Good, the effect of improving durability

Active Publication Date: 2019-07-09
西安汉河环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, sand and gravel are the main materials used in pavement base materials. However, in areas with a lot of aeolian sand, sand and gravel raw materials are seriously in short supply, and the price is expensive, and the project cost is high. The existing aeolian sand is used as the raw material for paving the base layer, so it is necessary to provide a method for molding new paving materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Collect bricks from demolition construction waste, crush them first, and then grind them into brick powder with a fineness of 210 meshes. Add brick powder, grade II fly ash, and P.O42.5 cement to the aeolian sand in sequence, and The mass ratio of cement, fly ash, brick powder and aeolian sand is 0.07:0.09:0.2:1, then stir in a mixer for 30s at a stirring speed of 40r / min to obtain a dry powder mixture, and then add water to the dry powder mixture , the amount of water added is 8.9% of the mass of the dry powder mixture, stirred in a mixer for 40s, and the stirring speed is 40r / min, to obtain a mixed slurry, and the resulting mixed slurry is spread on the road surface, and a 20t smooth wheel road roller is selected Carry out the initial pressing twice, the initial pressing speed is 3km / h and there is no vibration during the initial pressing process. It is measured that the degree of compaction of the pavement base after rolling is 97%, and finally the pavement is mainta...

Embodiment 2

[0034] Collect the bricks in the demolition construction waste, crush them first, and then grind them into brick powder with a fineness of 260 mesh, add brick powder, grade II fly ash, and P.O42.5 cement to the aeolian sand in sequence, and The mass ratio of cement, fly ash, brick powder and aeolian sand is 0.07:0.09:0.25:1, then stir in a mixer for 35s at a stirring speed of 50r / min to obtain a dry powder mixture, and then add water to the dry powder mixture , the amount of water added is 9.9% of the mass of the dry powder mixture, stirred in a mixer for 50s, and the stirring speed is 50r / min, to obtain a mixed slurry, and the resulting mixed slurry is spread on the road surface, and two 25t smooth wheel road rollers are selected Carry out the initial pressing twice, the initial pressing speed is 3.5km / h and there is no vibration during the initial pressing process. It is measured that the degree of compaction of the pavement base after rolling is 98%, and finally the pavemen...

Embodiment 3

[0036] Collect the bricks in the demolition construction waste, crush them first, and then grind them into brick powder with a fineness of 300 meshes, add brick powder, grade II fly ash, and P.O42.5 cement to the aeolian sand in sequence, and The mass ratio of cement, fly ash, brick powder and aeolian sand is 0.07:0.09:0.3:1, then stir in a mixer for 40s at a stirring speed of 60r / min to obtain a dry powder mixture, and then add water to the dry powder mixture , the amount of water added is 10.9% of the mass of the dry powder mixture, stirred in the mixer for 60s, and the stirring speed is 60r / min, to obtain a mixed slurry, and the resulting mixed slurry is spread on the road surface, and three 18t smooth wheel road rollers are selected Carry out the initial compaction for 3 times, the initial compaction speed is 4km / h and there is no vibration during the initial compaction process. The degree of compaction of the rolled pavement base is 99%, and finally the pavement is mainta...

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Abstract

The invention discloses a pavement base course forming method adopting aeolian sand as a raw material. The pavement base course forming method superficially comprises the following steps that brick powder is made; the brick powder, level-II pulverized fuel ash and P.O42.5 cement are sequentially added into aeolian sand, and full stirring is performed in a stirrer to obtain a dry mixed powder; water is added to the obtained dry mixed powder, and full stirring is performed in the stirrer to obtain mixed slurry; the obtained mixed slurry is spread on a pavement, then primary compression is performed by using a smooth wheel roller, then normal rolling compaction is conducted on the pavement till the measured compaction degree of a pavement base course after rolling compaction is 97% or above, and finally pavement maintenance is performed to obtain the formed pavement base course. The cheap aeolian sand easy to obtain is adopted to serve as the main raw material, and the cost for building the pavement base course is reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of concrete admixtures, and in particular relates to a pavement base molding method using aeolian sand as a raw material. Background technique [0002] At present, sand and gravel are the main materials used in pavement base materials. However, in areas with a lot of aeolian sand, there is a serious shortage of sand and gravel raw materials, and the price is expensive, and the project cost is high. In order to reduce the project cost, it is necessary to adapt measures to local conditions. The existing aeolian sand is used as the raw material for paving the base layer, therefore, it is necessary to provide a method for molding new paving materials. Contents of the invention [0003] The object of the present invention is to provide a pavement base forming method using aeolian sand as raw material. This method uses cheap and easily available aeolian sand as the main raw material, which reduces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04E01C7/12C04B111/34C04B111/76
CPCC04B28/04C04B2111/0075C04B2111/346C04B2111/76E01C7/12C04B18/16C04B18/08C04B14/068
Inventor 张东省马宇张航单鑫王超徐敏波张威张浩
Owner 西安汉河环保科技有限公司
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