Concrete for low-grade highway and preparation thereof

A concrete and low-grade technology, applied in the field of construction materials, can solve the problems of low concrete strength, achieve the effects of saving land resources, good long-term performance, and good resistance to sulfate erosion

Inactive Publication Date: 2008-12-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of low strength, the concrete prepared from industrial solid waste in the prior art cannot meet the requirements as a pavement surface material, and it is difficult to apply it as a main pavement material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The low-grade road concrete of the present embodiment is made of following raw materials:

[0030] 500kg of cementitious materials, including 175kg of 42.5 cement, and the rest are carbide slag and Class III fly ash, and the mass ratio of carbide slag to fly ash is 1:3;

[0031] Sand and gravel material 1750kg, of which the mass percentage of sand is 25%, and the rest is stone;

[0032] 200kg of water;

[0033] The sum of calcium carbide slag and fly ash mass is 3.25% sodium sulfate.

[0034] The method adopted in this embodiment is as follows:

[0035] 1) Weigh the raw materials according to the above ratio.

[0036] 2) Stir the calcium carbide slag and stones for 0.5 minutes;

[0037] 3) Add sand to the mixture obtained in step 2), and stir for 1 minute;

[0038] 4) Add cement, fly ash and sodium sulfate to the mixture obtained in step 3), and stir for 1.5 minutes;

[0039] 5) Add water to the mixture obtained in step 4), and stir for 4 minutes to obtain a concr...

Embodiment 2

[0043] The low-grade road concrete of the present embodiment is made of following raw materials:

[0044] 450kg of cementitious materials, including 42.5kg of cement and 157.5kg, the rest are carbide slag and Class III fly ash, the mass ratio of carbide slag to fly ash is 1:2.7;

[0045] Sand and gravel material 1850kg, of which the mass percentage of sand is 45%, and the rest is stone;

[0046] 160kg of water;

[0047]The sum of calcium carbide slag and fly ash mass is 3.55% sodium sulfate.

[0048] The method adopted in this embodiment is as follows:

[0049] 1) Weigh the raw materials according to the above ratio.

[0050] 2) Stir the calcium carbide slag and stones for 1 minute;

[0051] 3) Add sand to the mixture obtained in step 2), and stir for 0.5 minutes;

[0052] 4) Add cement, fly ash and sodium sulfate to the mixture obtained in step 3), and stir for 1 minute;

[0053] 5) Add water to the mixture obtained in step 4), and stir for 2 minutes to obtain a concret...

Embodiment 3

[0057] The low-grade road concrete of the present embodiment is made of following raw materials:

[0058] 480kg of cementitious materials, including 168kg of 32.5 cement, and the rest are carbide slag and Class III fly ash, the mass ratio of carbide slag to fly ash is 1:3.3;

[0059] Sand and gravel material 1800kg, of which the mass percentage of sand is 35%, and the rest is stone;

[0060] 180kg of water;

[0061] The sum of calcium carbide slag and fly ash mass is 3.75% sodium sulfate.

[0062] The method adopted in this embodiment is as follows:

[0063] 1) Weigh the raw materials according to the above ratio.

[0064] 2) Stir the calcium carbide slag and stones for 0.8 minutes;

[0065] 3) Add sand to the mixture obtained in step 2), and stir for 0.8 minutes;

[0066] 4) Add cement, fly ash and sodium sulfate to the mixture obtained in step 3), and stir for 1.2 minutes;

[0067] 5) Add water to the mixture obtained in step 4), and stir for 3 minutes to obtain a conc...

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Abstract

The invention discloses a concrete for low-grade highway prepared by cementing materials, sandstone materials, water and sodium sulphate, wherein the cementing materials are formed by cement, carbide slag and fly ash, the weight percentage of the cement accounts for 35-45% of the cementing materials, the balance is carbide slag and fly ash with the weight ratio of 1: 2.7-3.3; the weight ratio of each component is as follows: cementing materials 9-10 weight parts, sandstone materials 35-37 weight parts, water 3.2-4 weight parts, the dosage of the sodium sulphate accounting for 3.25-3.75% of the weight total of the carbide slag and fly ash. The invention also discloses a method for preparing the concrete comprising steps of preparation of concrete mixture, construction by compaction technology and maintenance.

Description

technical field [0001] The invention relates to the technical field of construction materials, in particular to a concrete material and a preparation method thereof, and is especially suitable for pavement surface layers of low-grade highways. Background technique [0002] Low-grade roads (roads below the second grade) are an important part of national roads, with a large number and wide distribution, accounting for most of the regional road network mileage. The pavement structure types are mainly semi-rigid base asphalt pavement such as asphalt surface treatment, penetration, asphalt concrete, and a small amount of flexible base asphalt pavement and cement concrete pavement. Cement concrete pavement structure is used for low-grade roads. Traditional cement concrete pavement uses cement as the binder, and the cost is relatively high. Therefore, reducing project cost and saving investment has become a common problem in the construction of low-grade highways. Making full use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B7/26C04B22/14
CPCC04B28/02C04B2111/0075C04B2111/26Y02W30/91C04B14/02C04B14/06C04B14/322C04B18/08C04B22/147
Inventor 黄煜镔党玉栋王庆珍乔墩王智钱觉时
Owner CHONGQING UNIV
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