Ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite and preparation method thereof

A polyethylene fiber, ultra-high molecular weight technology, applied in the field of materials science, to achieve the effects of reducing environmental pollution, optimizing bonding performance, ultra-high toughness and strength

Inactive Publication Date: 2018-09-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the coagulation and hardening mechanism of the geopolymer gelling system is very different from that of common Portland cement, many factors affect the strength of the composite material in the early reaction process, such as: the ratio of silicon to aluminum in the solid mixture, Alkali activator content and curing conditions, etc.

Method used

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  • Ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite and preparation method thereof
  • Ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite and preparation method thereof
  • Ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] Low calcium fly ash: 542 parts, high calcium fly ash: 136 parts, quartz sand: 182.7 parts, sodium silicate: 173 parts, sodium hydroxide: 38 parts, water: 160 parts, fiber: 14 parts, metakaolin : 20.3 parts.

[0036] The mixing ratio uses first-grade high-calcium fly ash, first-grade low-calcium fly ash and metakaolin from Inner Mongolia, and the solid mixture is added to the stirring pot at a slow speed (revolution 62±5r / min, rotation 140±5r / min) ) dry stirring for 3 minutes until uniform. Then dissolve the prepared alkali activator in water and add it to the stirring pot, stir quickly (revolution 125±10r / min, rotation 285±10r / min) for 5 minutes, add the fiber in the stated proportion, and stir for another 6 minutes until the superhigh Molecular weight polyethylene fibers are uniformly dispersed, and the PVA-reinforced ultra-high toughness geopolymer-based composite material slurry is obtained. Finally, the slurry is placed in a mold for molding, cured in an oven at 80...

Embodiment 2

[0041] Low calcium fly ash: 542 parts, high calcium fly ash: 136 parts, quartz sand: 203 parts, sodium silicate: 173 parts, sodium hydroxide: 38 parts, water: 160 parts, fiber: 15.6 parts, metakaolin : 0 copies.

[0042]The mixing ratio uses first-grade high-calcium fly ash and first-grade low-calcium fly ash, and the solid mixture is added to the stirring pot, and it is dry stirred at a slow speed (revolution 62±5r / min, rotation 140±5r / min) for 3 minutes to uniform. Then dissolve the prepared alkali activator in water and add it to the stirring pot, stir quickly (revolution 125±10r / min, rotation 285±10r / min) for 5 minutes, add the fiber in the stated proportion, and stir for another 6 minutes until the superhigh Molecular weight polyethylene fibers are uniformly dispersed, and the PVA-reinforced ultra-high toughness geopolymer-based composite material slurry is obtained. Finally, the slurry is placed in a mold for molding, cured in an oven at 80°C for 2 hours, and then cured...

Embodiment 3

[0046] Low calcium fly ash: 542 parts, high calcium fly ash: 136 parts, quartz sand: 192.9 parts, sodium silicate: 173 parts, sodium hydroxide: 38 parts, water: 160 parts, fiber: 17 parts, metakaolin : 10.2 parts.

[0047] The mixing ratio uses first-grade high-calcium fly ash, first-grade low-calcium fly ash and metakaolin from Inner Mongolia, and the solid mixture is added to the stirring pot at a slow speed (revolution 62±5r / min, rotation 140±5r / min) ) dry stirring for 3 minutes until uniform. Then dissolve the prepared alkali activator in water and add it to the stirring pot, stir quickly (revolution 125±10r / min, rotation 285±10r / min) for 5 minutes, add the fiber in the stated proportion, and stir for another 6 minutes until the superhigh Molecular weight polyethylene fibers are uniformly dispersed, and the PVA-reinforced ultra-high toughness geopolymer-based composite material slurry is obtained. Finally, the slurry is placed in a mold for molding, cured in an oven at 80...

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Abstract

The invention relates to ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite and a preparation method thereof. The ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite comprises, by weight, 300-600 parts of low-calcium flyash, 100-300 parts of high-calcium flyash, 0-50 parts of metakaolin, 100-300 parts of quartz sand, 100-300 parts ofwater, 20-50 parts of sodium hydroxide, 5-50 parts of ultrahigh-molecular-weight polyethylene fiber, and 100-200 parts of sodium silicate. The invention also provides the preparation method of the ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based composite. Compared with the prior art, the ultrahigh-molecular-weight polyethylene fiber reinforced geopolymer-based compositeand a the preparation method thereof have the advantages that the massive industrial waste, flyash, can be used to replace cement, the industrial waste is turned into wealth, the environment is effectively protected, energy consumption is lowered, and carbon dioxide emission is decreased; the ultrahigh-molecular-weight polyethylene fiber helps enhance the toughness of the composite, the defect that the traditional geopolymer-based composite has poor ductility is made up, and therefore, the composite herein is convenient to popularize and apply in the field of engineering in China.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a composite material for construction, in particular to an ultrahigh toughness geopolymer-based composite material reinforced by ultrahigh molecular weight polyethylene fibers and a preparation method thereof. Background technique [0002] Geopolymer is a kind of inorganic [SiO 4 ], [AlO 4 ] Tetrahedron as the main composition, a new type of inorganic silicon-aluminum gelling material with a three-dimensional network-like bonding structure. Compared with traditional cement-based materials, its raw materials have a wide range of sources, and it is convenient to prepare, with low energy consumption and CO 2 It has low emission, rapid hardening and early strength, high strength, impermeability, frost resistance, high toughness, corrosion resistance, fire resistance and solid sealing of heavy metals, etc., making it very good in engineering, especially in emergency repair and constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2201/50C04B16/0625C04B14/06C04B14/041Y02P40/10
Inventor 余江滔谢星星
Owner TONGJI UNIV
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