Green alkali-activated material for repair and protection and preparation method thereof

A technology of alkali excitation and alkali excitation agent, which is applied in the field of green alkali excitation materials for repair and protection and its preparation, can solve the problems of no reports, etc., and achieve the effects of improving fluidity, improving mechanical properties, and high popularization value.

Inactive Publication Date: 2021-03-19
HUNAN CSCEC5B CONCRETE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few concrete waste slurry used as alkali-activated materials in China at present, and there are no engineering examples of this kind of green alkali-activated materials used for repair and protection at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the mass percentage of slag powder in the green alkali excitation active material for repair and protection accounts for 38.5%, fly ash accounts for 11%, silica fume accounts for 5.5%, concrete waste slurry powder of mixing station accounts for 20%, and the reinforced group Sub-nanometer silica accounts for 1.5%, alkali activator (as Na 2 O meter) accounted for 7%, water-reducing components accounted for 1.5%, water accounted for 15%, and its total mass percentage was 100%.

[0025] The slag powder is S95 grade slag powder produced by Hunan Sanhong Building Materials Co., Ltd.; the fly ash is grade II fly ash of Yueyang Power Plant; the silica fume is the aggregated silicon micropowder, SiO 2 The content is greater than 90%; the alkali activator modulus is 1.5; nano-silica is commercially available, and the median particle size D50 is 30nm; the water-reducing component is provided by China Construction West Construction New Materials Co., Ltd., and t...

Embodiment 2

[0035] In this embodiment, the proportion of slag powder in the green alkali excitation material for repair and protection is 36%, the proportion of fly ash is 12%, the proportion of silica fume is 12%, the proportion of concrete waste slurry powder of mixing station is 15%, and the proportion of nano Silica accounted for 1.5%, alkali activator (as Na 2 O meter) accounted for 7%, water-reducing components accounted for 1.5%, water accounted for 15%, and its total mass percentage was 100%.

[0036] The slag powder is S95 grade slag powder produced by Hunan Sanhong Building Materials Co., Ltd.; the fly ash is grade II fly ash of Yueyang Power Plant; the silica fume is the aggregated silicon micropowder, SiO2 The content is greater than 90%; the alkali excitation modulus is 1.5; nano-silica is commercially available, and the median particle size D50 is 30nm; the water-reducing component is provided by China Construction West Construction New Materials Co., Ltd. The water rate is ...

Embodiment 3

[0039] In this embodiment, the proportion of slag powder in the green alkali excitation material for repair and protection is 39%, the proportion of fly ash is 13%, the proportion of silica fume is 12%, the proportion of concrete waste slurry powder of mixing station is 10%, and the proportion of nano Alumina accounted for 2%, alkali activator (as Na 2 O meter) accounted for 7%, water-reducing components accounted for 2%, water accounted for 15%, and its total mass percentage was 100%.

[0040] The slag powder is S95 grade slag powder produced by Hunan Sanhong Building Materials Co., Ltd.; the fly ash is grade II fly ash of Yueyang Power Plant; the silica fume is the aggregated silicon micropowder, SiO 2 The content is greater than 90%; the alkali excitation modulus is 1.5; nano-alumina is commercially available, and the median particle size D50 is 25nm; the water-reducing component is provided by China Construction West Construction New Materials Co., Ltd. The rate is greate...

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Abstract

The invention relates to a green alkali-activated material for repair and protection. The green alkali-activated material is composed of 55%-70% of an alkali-activated active matter, 0-20% of concretewaste slurry powder, 1%-2% of a reinforcing component, 6%-10% of an alkali activator, 1.5%-2% of a water reducing component and the balance water, and the total mass of the green alkali-activated material is 100%. The material is high in early strength, high in fluidity and suitable for construction. Specifically, the concrete waste slurry powder can provide part of excitation alkalinity requiredby an early reaction, aluminosilicate in the waste residue powder has potential alkali-activated active matters, and has a good way of absorbing mixing plant waste residues. The fluidity of a geopolymer can be improved by doping the fly ash and silica fume, the yield stress of the slurry is reduced, and the fluidity required by repair and protection is met. The ultra-dispersed nano reinforcing material is doped, so that the filling effect can be achieved in the alkali-activated reaction process, the dissolution of aluminosilicate minerals is promoted, and the mechanical properties of the alkali-activated material are improved. The green alkali-activated material for repair and protection is low in cost and environmentally friendly, and has high promotable value.

Description

technical field [0001] The invention belongs to the technical field of preparation of structural repair materials, and in particular relates to a green alkali excitation material for repair and protection and a preparation method thereof. Background technique [0002] In the past 30 years of rapid social and economic development, concrete roads and bridges have to be re-laid and maintained every ten years, which causes a huge amount of money wasted every year. Concrete projects in various countries, including China, have also suffered from aging and disease to varying degrees, which has promoted the rapid development of the concrete maintenance industry and the rapid upgrade of maintenance costs. The increase in the burden of concrete aging maintenance and reinforcement requires us to choose repairing and protective materials with excellent performance and high durability, and reasonably repair the existing seriously deteriorated concrete facilities. [0003] In addition, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B111/72
CPCC04B28/08C04B2111/72C04B2201/50C04B18/08C04B18/146C04B18/16C04B14/062C04B22/062C04B2103/302
Inventor 曾维冷政蒋震王军何彦琪向佳瑜笪俊伟曹毅
Owner HUNAN CSCEC5B CONCRETE
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