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Rolling basalt fiber cement concrete material and construction method for pavement surface thereof

A technology of basalt fiber and cement concrete, applied in the field of road engineering, can solve the problems of inconvenient mixing and construction, reduce the workability of concrete, limit the popularization and application, etc., achieve good mechanical properties, eliminate the problem of road rutting, and improve the ability to resist cracks. Effect

Inactive Publication Date: 2009-01-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of high-modulus steel fibers significantly reduces the workability of concrete, and it is inconvenient to mix and construct. Moreover, due to the large amount of fiber content, the price is expensive. At the same time, the steel fibers are easily corroded after the concrete cracks, resulting in performance degradation. In addition, ordinary Condensation joints still need to be set every 15-20m on the steel fiber concrete pavement; while low elastic modulus fibers (organic fibers, nylon, polypropylene, polyethylene, etc.) can only improve toughness, impact resistance and other properties related to toughness of concrete. physical properties
Using hybrid fiber concrete as the pavement material not only complicates the construction process, but also further increases the material cost, which limits its popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Raw material weight ratio is as follows in the present embodiment:

[0040] 3 parts of basalt fiber, 180 parts of grade 42.5 cement, 3 parts of XYPEX admixture C-1000NF as a cement-based permeable crystalline material, 180 parts of mineral admixture (including 70 parts of class II fly ash, 80 parts of ground slag, limestone powder 30 parts), FDN superplasticizer 3 parts, gravel material 1850 parts, water 125 parts.

[0041] The strength development of the concrete in this example was measured, the 3d compressive strength was 28.5MPa, the 3d flexural strength was 4.3MPa, the 28d compressive strength was 49.4MPa, and the 28d flexural strength was 6.5MPa.

Embodiment 2

[0043] Raw material weight ratio is as follows in the present embodiment:

[0044] 5 parts of basalt fiber, 400 parts of grade 42.5 cement, 5 parts of KIM as a cement-based permeable crystalline material, 150 parts of Class II fly ash, 1750 parts of sand and gravel material, and 180 parts of water.

[0045] The development of the strength of the concrete in this example was measured, the 7d compressive strength was 32.6MPa, the 7d flexural strength was 5.3MPa, the 28d compressive strength was 40.8MPa, and the 28d flexural strength was 6.1MPa.

Embodiment 3

[0047] Raw material weight ratio is as follows in the present embodiment:

[0048] 4 parts of basalt fiber, 300 parts of grade 42.5 cement, 4 parts of KIM as a cement-based permeable crystalline material, 120 parts of class II fly ash, 5 parts of polycarboxylic acid superplasticizer, 1810 parts of sand and gravel materials , 100 parts of water.

[0049]Determination of the strength development of the concrete in this example shows that the 3d compressive strength is 33.5MPa, the 3d flexural strength is 4.9MPa, the 28d compressive strength is 45.8MPa, and the 28d flexural strength is 6.3MPa.

[0050] The present invention also provides a construction method for rolling the basalt fiber cement concrete material as the pavement surface layer, comprising the following steps:

[0051] 1) Weigh raw materials according to the following ratio:

[0052] 3-5 parts of basalt fiber, 180-400 parts of cement, 3-5 parts of cement-based permeable crystalline material, 120-180 parts of miner...

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Abstract

The aim of the invention is to utilize a grinding basalt fiber cement concrete material with good workability and physical mechanics performance and perfect durability. The material is formed by mixing, stirring and grinding of the following components in weight portion: 3 to 5 portions of basalt fiber, 180 to 400 portions of cement, 3 to 5 portions of cement-based capillary crystalline material, 120 to 180 portions of mineral admixture, 0 to 5 portions of water reducing agent, 1750 to 1850 portions of sandstone and 100 to 180 portions of water; when the material is applied to a road surface concrete, the material can improve the tensile strength, impermeability, cracking resistance, shock resistance, deformation resistance, frost resistance and anti-fatigue of the concrete road surface, and the material also has the advantages of easy construction, reasonable price and suitable popularization and application. The invention also provides a construction method for utilizing the grinding basalt fiber cement concrete material as a road surface.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a cement concrete material and a construction method thereof as a pavement surface layer. Background technique [0002] In highway engineering, cement concrete has been widely used due to its advantages such as wide source of materials, simple construction, high strength, good stability, and excellent durability. Cement concrete pavement has become one of the most important pavement structural forms. However, as a pavement material, the inherent shortcomings of cement concrete materials are also very obvious, especially in two aspects, one is the low bending and tensile strength, generally only 1 / 7-1 / 6 of its compressive strength; the other is brittleness Large, poor adaptability to deformation, easy to crack. Therefore, the cement concrete pavement needs to be provided with expansion joints during the construction process, and the cement concrete pavement is prone to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/38C04B14/04
CPCC04B2111/20C04B2111/00482C04B2111/27C04B2111/0075C04B2111/343C04B28/02
Inventor 黄煜镔姜文超周小平王进勇
Owner CHONGQING UNIV
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