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Autoclaved aerated concrete block and preparation method thereof

A concrete block, autoclaved gas filling technology, applied in the field of building materials, can solve the problems of large drying shrinkage deformation, wall cracking, etc., and achieve the effects of improving performance, protecting the environment, and excellent performance of block products

Active Publication Date: 2021-12-03
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses tiny particles called fine sand or dust from wind power generators' rotor blinds instead of traditional methods for producing them like cement clinker (cement) brick). These fines help fill cracks between layers inside the building during construction with less water than usual but still maintain enough rigidity when they solidify properly. By replacing these expensive components at an earlier stage, this method saves money on manufacturing costs compared to older ways such as adding more lime paste afterwards. Additionally, it improves the durability of the buildings by reducing damage caused by rainwater impacts. Overall, this new approach helps make better use of available landfill space and reduces environmental pollution associated therewith.

Problems solved by technology

This patented describes how well known types of building material called autocallued aerated concretes (AAC) were developed during World War II when they had been tested for their ability to resist fires without causing damage or cracks over time. These tests showed that AACs with improved thermal insulating capabilities compared to normal clays found on traditional construction methods resulted in better energy efficiency and reduced carbon emissions from burning fossil fuels. Additionally, these new compositions also exhibited enhanced mechanical stability under compression loads caused by gravity loading. Overall, this innovation provides technical benefits including increased durability against fire hazards, reduction of COx/CO, noise pollution, and cost savings associated therewith.

Method used

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  • Autoclaved aerated concrete block and preparation method thereof
  • Autoclaved aerated concrete block and preparation method thereof

Examples

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preparation example Construction

[0013] The raw materials for preparing the autoclaved aerated concrete block provided by the invention include dry materials. In parts by mass, the dry material of the autoclaved aerated concrete block provided by the present invention includes 15-25 parts of cement, more preferably 17-23 parts. In the present invention, the cement preferably includes P·O42.5 cement, P·I42.5 cement or P·II42.5 cement, more preferably P·O42.5 cement.

[0014] Based on the mass fraction of the cement, the dry material of the autoclaved aerated concrete block provided by the present invention includes 25-35 parts of quicklime powder, more preferably 27-33 parts. In the present invention, the quicklime powder is preferably ground calcareous quicklime powder, the effective content of CaO and MgO in the quicklime powder is preferably ≥ 85wt.%, and the particle size of the quicklime powder is preferably 1-200 μm, more preferably 1 to 100 μm. The quicklime powder used in the present invention has a ...

Embodiment 1

[0041] Cut the waste wind power blades to obtain a large piece of material with a width of 40cm and a length of 150cm; put the large piece of material into a shredder and shred it under 100kw to obtain a small piece of material with a size of 8cm; The small pieces of material are put into a pulverizer and crushed at 50kw to obtain irregular crushed materials, and then sorted by a fan at 8kw to obtain waste wind power blade fibers with a length of 0.45mm and waste wind power blades with a particle size of ≤0.05mm. Leaf powder is sent to a special storage bin for standby;

[0042] Weigh 15 parts of P·O42.5 cement, 35 parts of quicklime powder (particle size 1-100 μm, effective content of CaO and MgO is 85wt.%), 40 parts of waste wind power blade powder (particle size ≤ 0.05mm, ratio The surface area value is 700m 2 / kg), 6 parts of waste wind power blade fiber (diameter is 20 μm, length is 0.45 mm, aspect ratio is 30) and 4 parts of natural dihydrate gypsum (total content of di...

Embodiment 2

[0044] The difference with Example 1 is that the dry material in the raw materials for the preparation of the autoclaved aerated concrete block includes 20 parts of P.O42.5 cement, 28 parts of quicklime powder (with a particle size of 1 to 100 μm, the effective content of CaO and MgO content of 85wt.%), 45 parts of waste wind power blade powder (particle size ≤ 0.05mm, specific surface area value 700m 2 / kg), 4 parts of waste wind power blade fiber (diameter is 20 μm, length is 0.45 mm, aspect ratio is 30) and 3 parts of natural dihydrate gypsum (total content of dihydrate gypsum and anhydrite ≥75wt.%), 60 The water of % dry matter quality and the aluminum powder (purity is 95%) of 0.07% dry matter quality, all the other contents are consistent with embodiment 1.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to an autoclaved aerated concrete block and a preparation method thereof. Waste wind power blade fibers used in the invention can inhibit and reduce the dry shrinkage of the autoclaved aerated concrete block, and avoid the problems of masonry cracking and the like caused by water absorption and large dry shrinkage of the block in the actual use process; and the characteristics of small particle size and high specific surface area of the waste wind power blade powder are fully utilized, the waste wind power blade powder is used for replacing fly ash, slag and other raw materials in conventional building block production raw materials, the micro aggregate filling effect of the waste wind power blade powder is exerted, and the mechanical property of the building block is enhanced.

Description

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Claims

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Application Information

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Owner HUNAN UNIV OF SCI & TECH
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