High-toughness geopolymer grouting material modified by ultra-high molecular weight fiber-emulsified asphalt, its preparation method and application

A geopolymer and ultra-high molecular weight technology, used in cement production and other directions, can solve the problems of poor road substrate matching and durability, achieve low temperature sensitivity, improve matching, and prevent the entry of harmful impurities and water.

Active Publication Date: 2021-12-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer grouting material and its preparation method and application in order to overcome the defects in the above-mentioned prior art, to solve the existing grouting material Technical problems such as poor durability and poor matching of road matrix

Method used

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  • High-toughness geopolymer grouting material modified by ultra-high molecular weight fiber-emulsified asphalt, its preparation method and application
  • High-toughness geopolymer grouting material modified by ultra-high molecular weight fiber-emulsified asphalt, its preparation method and application
  • High-toughness geopolymer grouting material modified by ultra-high molecular weight fiber-emulsified asphalt, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0065] This embodiment provides a high-toughness geopolymer modified by ultra-high molecular weight fiber-emulsified asphalt. The mass components of this material are:

[0066] Emulsified asphalt: 8 parts

[0067] Geopolymer: 100 parts

[0068] Alkali challenge solution: 120 parts

[0069] Ultra High Molecular Weight Fiber: 2 parts.

[0070] In this implementation, the emulsified asphalt is medium-cracked or slow-cracked cationic emulsified asphalt, the sieve allowance of the cationic emulsified asphalt is ≤0.1%, and the 1d normal temperature stability is ≤1%.

[0071] In this implementation, the geopolymer is metakaolin with a bulk density of 1.25-1.72g / cm 3 .

[0072] In this implementation, the ultra-high molecular weight fiber density is 0.97g / cm 3 , the strain at break is 2 to 3%, the fiber diameter is 20 μm, the length is 6 mm, and the fiber volume dosage is 1%.

[0073] In this implementation, alkali excitation solution is made up of sodium silicate solution (wat...

Embodiment 2

[0089] This embodiment provides a high-toughness geopolymer modified by ultra-high molecular weight fiber-emulsified asphalt. The mass components of this material are:

[0090] Emulsified asphalt: 8 parts

[0091] Geopolymer: 100 parts

[0092] Alkali challenge solution: 90 parts

[0093] Ultra High Molecular Weight Fiber: 2 parts.

[0094] The kind and consumption of each raw material and performance requirement are identical with embodiment 1 in the present embodiment.

[0095] The preparation method and performance test of the high-toughness cement grouting material in this embodiment are basically the same as those in Embodiment 1.

[0096] In this example, the pumpability of the ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer grouting material is analyzed more accurately to verify its feasibility as a grouting material. The thixotropic index of freshly prepared slurries was determined.

[0097] according to Figure 4 , prepared...

Embodiment 3

[0100] This embodiment provides a high-toughness geopolymer modified by ultra-high molecular weight fiber-emulsified asphalt. The mass components of this material are:

[0101] Emulsified asphalt: 8 parts

[0102] Geopolymer: 100 parts

[0103] Alkali challenge solution: 90 parts

[0104] Ultra High Molecular Weight Fiber: 2 parts.

[0105] The kind and consumption of each raw material and performance requirement are identical with embodiment 1 in the present embodiment.

[0106] The preparation method of the ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer of this embodiment is basically the same as that of Embodiment 1.

[0107] In this example, in order to more accurately verify the performance evolution of the ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer injected into the bottom of the cement concrete pavement slab, the structural recovery ability of the prepared fresh slurry was measured...

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Abstract

The invention relates to a high-toughness geopolymer grouting material modified by ultra-high molecular weight fiber-emulsified asphalt and its preparation method and application. The weight components of the grouting material are: emulsified asphalt: 4-12 parts, geopolymerization Substance: 80‑100 parts, alkali excitation solution: 103‑126 parts, ultra-high molecular weight fiber: 2‑3 parts, water: 30‑35 parts. Compared with the prior art, the ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer grouting material in the present invention is simple to prepare, has good fluidity, and has the characteristics of both rigidity and softness of geopolymer and asphalt. It has a good matching degree with the road matrix, and the good toughness and crack control ability of ultra-high molecular weight fibers enable this new type of grouting material to overcome the durability problems of ordinary geopolymer-based materials, and can be applied to the bottom of the cement concrete pavement. In the non-excavation reinforcement technology of the grassroots and roadbed of empty and high-grade highways.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to an ultra-high molecular weight fiber-emulsified asphalt modified high-toughness geopolymer grouting material, its preparation method and application. Background technique [0002] As the main carrier of traffic operation, under the influence of repeated traffic loads and complex natural environments, including temperature and humidity, etc., diseases such as grass-roots erosion, soft subsidence, and local strength deficiency gradually appear, which seriously affect the driving comfort, and even greatly reduce the service life of the road. At present, the maintenance technologies often adopted to solve this problem mainly involve overlay treatment, excavation and resurfacing, and grouting reinforcement. Among them, grouting reinforcement technology has become one of the preferred technologies in road trenchless maintenance and reinforcement due to its mature te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/003C04B2111/0075C04B2201/50C04B16/06C04B24/36Y02P40/10Y02W30/91C04B28/006C04B2111/70C04B12/04C04B14/106C04B16/0625C04B18/08C04B18/141C04B22/062E01C7/147
Inventor 朱兴一庞亚凤杜豫川
Owner TONGJI UNIV
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