All-solid-waste ultra-high-performance geopolymer concrete and preparation method thereof

An ultra-high performance, geopolymer technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., which can solve the problem of increasing the steps and difficulty of preparation, increasing cost and energy consumption, and poor tensile and bending resistance and other problems, to achieve the effect of superior bonding performance, improved sustainability, and reduced production energy consumption

Active Publication Date: 2022-02-08
无锡初如企业管理合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses solid waste materials, which improves the cohesiveness of concrete while being environmentally friendly, but it is necessary to strictly control the particle sizes of converter steel slag micropowder, carbide slag micropowder and refining slag micropowder to obtain effective experimental results, which increases the preparation time. Steps and difficulty, and the finished product has poor tensile bending resistance
[0005] Document 3 (“Liu Xuan; Cui Xiaowei; Ni Wen et al.; Effect of steel slag powder on the strength of all-solid waste concrete [J]. Metal Mine, 2016 (10): 189-192.”) The hydration mechanism and strength of waste concrete have been discussed in depth, but the test blocks need to be cured in a standard curing box with constant temperature and humidity, and the grindability of steel slag is poor. In order to obtain a higher specific surface area of ​​steel slag, Requires substantial increase in cost and energy consumption

Method used

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  • All-solid-waste ultra-high-performance geopolymer concrete and preparation method thereof
  • All-solid-waste ultra-high-performance geopolymer concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The schematic diagram of the preparation process of all solid waste ultra-high performance geopolymer concrete in this example is shown in figure 2 ;

[0050] In terms of parts by mass, the following raw materials are taken: 20 parts of aggregate, 80 parts of gelling material (in terms of mass percentage, 30% of fly ash, 60% of slag, 10% of silica fume), carbon nanotubes (aggregate, gelling 2% of the total volume of the material), steel fiber (1% of the total volume of aggregate and cementitious material); alkali activator (the ratio of the total mass of aggregate, cementitious material and alkali activator is 1kg: 400mL);

[0051] The preparation process is as follows:

[0052] (1) Add fly ash, slag, silica fume, and carbon nanotubes into the mixer, stir at a low speed (300 rpm) for 2 minutes, then add aggregate and stir for 1 minute to obtain a solid powder mixture.

[0053] (2) Slowly add the base activator into the mixture, while stirring evenly for 5 minutes.

...

Embodiment 2

[0058] With embodiment 1, difference is, raw material: 20 parts of aggregates, 80 parts of cementitious materials (in terms of mass percentage, fly ash 30%, slag 60%, silica fume 10%), carbon nanotubes (aggregate, gelled 2% of the total volume of the material), steel fiber (2% of the total volume of aggregate and cementitious material); alkali activator (the ratio of aggregate, cementitious material total mass and alkali activator is 1kg: 400mL).

[0059] After demoulding, it was cured for 14 days in an indoor environment with normal temperature and pressure and normal humidity (temperature 25°C, humidity 70%), and then a concrete sample press was used to conduct a compressive test. The results showed that the compressive strength of the sample was 79MPa .

Embodiment 3

[0061] With embodiment 1, difference is, raw material: 20 parts of aggregates, 80 parts of cementitious materials (in terms of mass percentage, fly ash 30%, slag 60%, silica fume 10%), carbon nanotubes (aggregate, gelled 2% of the total volume of the material), steel fiber (3% of the total volume of aggregate and cementitious material); alkali activator (the ratio of the total mass of aggregate, cementitious material and alkali activator is 1kg: 400mL).

[0062] After demoulding, it was cured for 14 days in an indoor environment with normal temperature and pressure and normal humidity (temperature 25°C, humidity 70%), and then a concrete sample press was used to conduct a compressive test. The results showed that the compressive strength of the sample was 85MPa .

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Abstract

The invention relates to the technical field of geopolymer concrete, in particular to all-solid-waste ultra-high-performance geopolymer concrete and a preparation method thereof. The all-solid-waste ultra-high-performance geopolymer concrete is prepared from the following raw materials in parts by mass: 20 to 30 parts of aggregate, 70 to 80 parts of cementing material, carbon nanotubes, steel fibers and an alkali activator, wherein the cementing material comprises the following components in percentage by mass: 15-35% of fly ash, 50-70% of slag and 5-25% of silica fume; and the aggregate is regenerated matrix sand. The geopolymer concrete does not need to use a water reducing agent, and has the advantages of effective utilization of waste resources, low cost, simple preparation and excellent performance.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization and preparation of geopolymer concrete, in particular to an all-solid waste ultra-high performance geopolymer concrete and a preparation method thereof. Background technique [0002] Geopolymer is a kind of aluminum-oxygen-aluminum-oxygen-polymer formed by polycondensation of silicon-aluminum inorganic raw materials through mineral polycondensation. Silicate gelling material with amorphous network structure. The hydration reaction of the geopolymer is a process in which the silicon-oxygen bond and the aluminum-oxygen bond undergo a break-recombination reaction under the action of an alkaline activator, and then polymerize to form a gelling and curable geopolymer. Geopolymer cementitious material products do not need wet curing, short curing period, rich raw materials, low cost, fast hardening and early strength, corrosion resistance, low thermal conductivity and good plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B7/26C04B7/14C04B7/147C04B18/16C04B14/02C04B14/48
CPCC04B28/006C04B7/243C04B7/14C04B7/147C04B18/16C04B14/026C04B14/48C04B2111/00017C04B2201/50C04B22/062C04B12/04Y02P40/10Y02W30/91
Inventor 蔡景明张聪李吴刚张勇张建鲁晓源
Owner 无锡初如企业管理合伙企业(有限合伙)
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