High-doping-amount fly ash concrete road surface material and preparation method thereof

A technology for concrete pavement and fly ash, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the lack of, no formation of high-volume fly ash concrete mix ratio design method, and backward application technology and other problems, to achieve the effect of improving the early and late stages, solving the problem of pavement cracking, and improving durability

Inactive Publication Date: 2012-07-04
SHANXI PROVINCIAL RES INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, because the application technology of fly ash in cement concrete pavement is relatively backward, and there is no mature design method of high-volume fly ash concrete mix ratio,

Method used

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  • High-doping-amount fly ash concrete road surface material and preparation method thereof

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example 1

[0020] If the accumulative times of the standard axle load in the design reference period of a certain expressway is 1 million times, then the concrete surface layer can adopt the novel high-volume fly ash concrete material of the present invention. The design index requirements are: flexural strength 5.0MPa, compressive strength above 35MPa, air content 5±1%, water-binder ratio 0.32~0.4; slump 30~50mm. For this reason, the material ratio scheme of high-volume fly ash concrete is proposed as cement: fly ash: water: medium sand: gravel: composite admixture = 192:192:139:587:1307:6.53 (mass ratio). The design parameters of the mix ratio are respectively, the fly ash content is 50%, the water-binder ratio is 0.36, and the sand rate is 31%. Among them, ordinary Portland 42.5 grade cement, Grade fly ash, Wenshui sand, Wenshui limestone gravel, composite admixture.

example 2

[0022] If the accumulative times of the standard axle load in the design reference period of a certain expressway is 3 million times, then the concrete surface layer can adopt the novel high-volume fly ash concrete material of the present invention. The design index requirements are: flexural strength 5.0MPa, compressive strength above 35MPa, air content 5±1%, water-binder ratio 0.32~0.4; slump 30~50mm. For this reason, the material ratio scheme of high-volume fly ash concrete is proposed as cement: fly ash: water: medium sand: gravel: composite admixture = 192:192:139:587:1307:6.53 (mass ratio). The design parameters of the mix ratio are respectively, the fly ash content is 50%, the water-binder ratio is 0.36, and the sand rate is 31%. Among them, ordinary Portland 42.5 grade cement, Grade fly ash, Wenshui sand, Wenshui limestone gravel, composite admixture.

example 3

[0024] If the accumulative number of standard axle load actions within the design reference period of a certain expressway is 6 million times, then the concrete surface layer can adopt the novel high-volume fly ash concrete material of the present invention. The design index requirements are: flexural strength 5.0MPa, compressive strength above 35MPa, air content 5±1%, water-binder ratio 0.32~0.4; slump 30~50mm. For this reason, the material ratio scheme of high-volume fly ash concrete is proposed as cement: fly ash: water: medium sand: gravel: composite admixture = 192:192:139:587:1307:6.53 (mass ratio). The design parameters of the mix ratio are respectively, the fly ash content is 50%, the water-binder ratio is 0.36, and the sand rate is 31%. Among them, ordinary Portland 42.5 grade cement, Grade fly ash, Wenshui sand, Wenshui limestone gravel, composite admixture.

[0025] In the preparation method of the high-volume fly ash concrete pavement material implemented in Exa...

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Abstract

The invention discloses a high-doping-amount fly ash concrete road surface material, which is prepared from the following raw materials in parts by weight: 192 parts of cement, 192 parts of fly ash, 139 parts of water, 587 parts of medium sand, 1,307 parts of macadam and 6.53 parts of a compound additive, wherein the cement is ordinary silicate 42.5-grade cement; the fly ash is graded powder fly ash; the macadam is limestone macadam; and the compound additive consists of an efficient water reducing agent and a fly ash active exciting agent. A preparation method of the road surface material comprises the following steps of: weighing cement, fly ash, water, medium san, macadam and the compound additive according to the burdening proportions for later use; uniformly mixing the cement, fly ash, medium sand and macadam under the normal temperature condition; and adding water and the compound additive, and fully stirring to obtain the high-doping-amount fly ash concrete road surface material. Due to the adoption of the road surface material, the cement using amount is saved, the water-gel ratio is reduced, the problem of cracking of a road surface is effectively solved, the early and later strength increase of the concrete are greatly increased, and the size stability and high durability are ensured.

Description

[0001] technical field [0002] The invention relates to the field of preparation of road cement concrete pavement materials, in particular to a high-volume fly ash concrete pavement material and a preparation method thereof. Background technique [0003] Fly ash emissions from thermal power generation have become the largest single pollution source of industrial solid waste in China, with every 4 tons of coal consumed produces 1 ton of fly ash. China's thermal power installed capacity has shown explosive growth since 2002, therefore, fly ash emissions have also increased by 2.5 times in the past 8 years. In 2009, the output of fly ash in China reached 375 million tons, equivalent to more than twice the total amount of urban domestic waste in China that year, and its volume could reach 424 million cubic meters, which is equivalent to filling a standard swimming pool every two and a half minutes , or one water cube per day. Fly ash not only occupies a large amount of la...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/08
CPCY02W30/91
Inventor 申俊敏马钢王慧刘海沈佳
Owner SHANXI PROVINCIAL RES INST OF COMM
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