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Geopolymer-based heavy load pavement paving material and preparation method thereof

A technology of geopolymer and composition, applied in the field of building materials, can solve the problems of easy cracking, weaker strength than concrete, long setting time, etc., and achieve the effects of low cost, low shrinkage, and short setting time

Inactive Publication Date: 2017-03-15
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of the asphalt pavement materials of the above-mentioned prior art is not as good as that of concrete, the setting time is long, and cracking occurs easily, and in the prior art, solid wastes such as fly ash, slag, and coal gangue are used as raw materials to prepare geopolymer concrete as heavy-duty concrete. Pavement paving materials have not been reported yet

Method used

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  • Geopolymer-based heavy load pavement paving material and preparation method thereof

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preparation example Construction

[0034] A preferred preparation method of the material of the present invention comprises the steps of:

[0035] - step (a), uniformly mixing 30 to 40 parts by weight of sodium hydroxide and 240 to 320 parts by weight of water glass with a modulus of 3.2 to obtain an alkaline activator;

[0036] - step (b), respectively sieving metakaolin, slag and fly ash to obtain metakaolin, slag and fly ash with a particle size of 15 to 25 microns;

[0037] - In step (c), 240 to 270 parts by weight of metakaolin, 90 to 105 parts by weight of slag, 40 to 70 parts by weight of fly ash, 580 to 620 parts by weight of river sand, and 1000 to 1200 parts by weight of uniform mix to obtain a mixture;

[0038] -Step (d), adding the basic activator obtained in step (a) to the mixture obtained in step (b) within 30 seconds under stirring, and continuing to stir and react after the addition;

[0039] Among them, the particle size of river sand is 0.3-0.5 mm, and the particle size of basalt gravel is ...

Embodiment 1

[0055] In this embodiment, the composition of the present invention is used to polymerize to form the material of the present invention, and then the material of the present invention is used for road pavement, which specifically includes the following steps:

[0056] Step 1: Mix 240 parts of water glass and 30 parts of sodium hydroxide solid and stir evenly until the sodium hydroxide solid is completely dissolved to obtain an activator, and cool to room temperature for later use.

[0057] Step 2: Grind metakaolin, slag and fly ash to 1250 mesh and sieve.

[0058] Step 3: Take 240 parts, 100 parts, and 60 parts of metakaolin, slag and fly ash respectively, take 580 parts of river sand, and 1000 parts of basalt gravel, start the concrete mixer and stir the dry mixture for 4 to 5 minutes until uniformly mixed, Then add the activator prepared in the first step, add the activator while stirring the dry mixture, and add the activator within 30s. Finally the mixture was stirred for...

Embodiment 2

[0062] In this embodiment, the composition of the present invention is used to polymerize to form the material of the present invention, and then the material of the present invention is used for road pavement, which specifically includes the following steps:

[0063] Step 1: Mix 260 parts of water glass and 32.5 parts of sodium hydroxide solid and stir evenly until the sodium hydroxide solid is completely dissolved to obtain an activator, and cool to room temperature for later use.

[0064] Step 2: Grind metakaolin, slag and fly ash to 1250 mesh and sieve.

[0065] Step 3: Take 250 parts, 95 parts, and 50 parts of metakaolin, slag and fly ash respectively, take 600 parts of river sand, and 1100 parts of basalt gravel, start the concrete mixer to stir the dry mixture for 4-5 minutes until uniformly mixed, and then Add the activator prepared in the first step, add the activator while stirring the dry mixture, and add the activator within 30s. Finally the mixture was stirred fo...

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Abstract

The invention relates to the technical field of building materials, in particular to a geopolymer composite, a geopolymer-based heavy load pavement paving material and a preparation method of the material. The geopolymer composite comprises a first component with particle size of 15-25 micrometers, a fine aggregate component with particle size of 0.3-0.5 millimeter, a coarse aggregate component with particle size of 5-31 millimeters and an alkali activator, wherein the first component comprises metakaolin, slag and fly ash. The provided composite comprises metakaolin, slag, fly ash, the fine aggregate component and the coarse aggregate component, and is polymerized under excitation of the alkali activator to form the concrete type geopolymer-based heavy load pavement paving material. The geopolymer-based heavy load pavement paving material is suitable for paving a heavy load pavement, and has the advantages of being short in setting time, high in strength, low in contractibility rate, cracking resistant and the like. The paving material is prepared from solid waste raw materials, the preparation technology is simple, construction is convenient, operation is convenient, cost is low, and the paving material is suitable for large-scale application and popularization.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a geopolymer composition, a geopolymer-based heavy-duty pavement material made of the composition, and a preparation method of the above material. Background technique [0002] Faced with the increasing pressure of road traffic, many cement concrete roads are damaged due to overwhelm, and the main damage types are cracks, misalignment, looseness, potholes, and layered spalling. Usually, the pavement surface is mainly made of ordinary cement concrete, and large and overweight coal transport vehicles have caused serious damage to the pavement. Therefore, seeking a pavement pavement material with fast setting and hardening, high strength and excellent durability is an urgent problem to be solved in heavy traffic areas. [0003] Traditional cement concrete pavement construction has disadvantages such as long setting time, long maintenance period, and long opening time for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/10C04B18/14C04B18/08C04B22/08C04B22/06
CPCC04B28/006C04B2201/50C04B2201/52C04B2111/0075C04B14/106C04B18/141C04B18/08C04B22/08C04B22/062C04B14/14C04B14/068Y02P40/10Y02W30/91
Inventor 段平严春杰王洪权周伟浦嵩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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