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A kind of oil shale ash slag antifreeze masonry and preparation method thereof

An oil shale ash and masonry technology is applied in the field of building materials to achieve the effects of good buffering effect, improved frost resistance and good compressive strength at room temperature

Active Publication Date: 2022-07-05
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the experience of resource utilization of other industrial solid wastes, the use of oil shale ash for the preparation of building materials is still the best way to effectively utilize this solid waste, especially for the preparation of cement-based building materials. It is used to prepare cement-based building materials, but there are few reports on the use of oil shale ash to prepare frost-resistant masonry

Method used

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  • A kind of oil shale ash slag antifreeze masonry and preparation method thereof
  • A kind of oil shale ash slag antifreeze masonry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of oil shale ash slag frost-resistant masonry includes the following steps:

[0033] (1) mixing capric acid, tetradecane, butyl stearate and polyethylene glycol 800 whose mass ratio is 2:6:1:4, and the resulting mixture is dissolved in a concentration of 1:18 according to mass ratio as In 25wt% ethanol solvent, the copolymer phase change material was obtained by heating in a water bath at 45℃ for 2.5h. It was verified that the phase change temperature of the copolymer was 2.8℃, and the latent heat of phase change was 214.8J / g;

[0034] (2) 25 parts of the phase change material obtained in step (1) were mixed with 85 parts of oil shale ash residue and stirred for 20min, and then allowed to stand for 75min to obtain material A;

[0035] (3) combining the material A obtained in step (2) with 35 parts of nano-SiO 2 Mix and stir for 35min to obtain material B;

[0036] (4) mixing sodium silicate and sodium hydroxide in a mass ratio of 1:2.5 to obtain an alk...

Embodiment 2

[0039] The preparation of oil shale ash slag antifreeze masonry, the steps are as follows:

[0040](1) mixing the capric acid, tetradecane, butyl stearate and polyethylene glycol 800 with a mass ratio of 2:6:1:3, and the resulting mixture is dissolved in a concentration of 1:15 according to the mass ratio of In 30wt% ethanol solvent, the copolymer phase change material was obtained by heating it in a water bath at 50℃ for 2h. It was verified that the phase change temperature of the copolymer was 3.5℃, and the latent heat of phase change was 208.9J / g;

[0041] (2) mixing 20 parts of the phase change material obtained in step (1) with 80 parts of oil shale ash residue and stirring for 20min, and then standing for 60min to obtain material A;

[0042] (3) combining step (2) gained material A with 30 parts of nano-SiO 2 Mix and stir for 30min to obtain material B;

[0043] (4) mixing sodium silicate and sodium hydroxide in a mass ratio of 1:2 to obtain an alkali activator, and mi...

Embodiment 3

[0046] The preparation of oil shale ash slag frost-resistant masonry includes the following steps:

[0047] (1) mix the capric acid, tetradecane, butyl stearate and polyethylene glycol 800 with a mass ratio of 2:6:1:5, and dissolve the resulting mixture in a concentration of 1:20 according to the mass ratio In 20wt% ethanol solvent, the copolymer phase change material was obtained by heating in a water bath at 40℃ for 3h. It was verified that the phase change temperature of the copolymer was 3.1℃, and the latent heat of phase change was 210.3J / g;

[0048] (2) 30 parts of the phase change material obtained in step (1) were mixed with 90 parts of oil shale ash residue and stirred for 20 minutes, and then allowed to stand for 90 minutes to obtain material A;

[0049] (3) combining the material A obtained in step (2) with 40 parts of nano-SiO 2 Mix and stir for 40min to obtain material B;

[0050] (4) mixing sodium silicate and sodium hydroxide in a mass ratio of 1:3 to obtain a...

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Abstract

The invention discloses an oil shale ash slag antifreeze masonry and a preparation method thereof, belonging to the technical field of building materials. The raw materials include oil shale ash slag, phase change material, water, fly ash, quartz sand and water reducing agent , alkali activator, nanometer and cement; wherein the preparation method of phase change material is: mixing a certain amount of capric acid, tetradecane, butyl stearate and polyethylene glycol, and dissolving the obtained mixture in ethanol, Heating is enough; the production method of oil shale antifreeze masonry includes the following steps: mixing oil shale ash and phase change material, standing, and then mixing with nano-SiO 2 Mixing, then mixing with fly ash, alkali activator and part of water, finally adding cement, quartz sand, water reducing agent and remaining water, mixing and molding; The body has good compressive performance at room temperature, and its antifreeze performance is excellent. After 150 freeze-thaw cycles, the mass loss rate and compressive strength loss rate are low.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to an oil shale ash slag antifreeze masonry and a preparation method thereof. Background technique [0002] In some areas, due to the cold winter, the masonry made of cement-based composite materials will suffer from freeze-thaw cycle damage in this environment, affecting its safety and life. At present, it requires a lot of manpower and material resources to carry out Maintenance, but maintenance is not only difficult, but the effect after maintenance is also unsatisfactory, and often cracks and falls off soon after maintenance. Therefore, in order to improve the durability of cement-based composite masonry, it is necessary to resist Freezing performance is improved. [0003] Oil shale is a kind of sedimentary rock containing combustible organic matter with high ash content. Its main difference from coal is that its ash content exceeds 40%, and its main difference from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/12C04B24/32C04B24/08C04B24/04C04B24/02C04B24/00C04B14/06C04B111/76
CPCC04B28/04C04B18/125C04B24/04C04B24/00C04B24/085C04B24/32C04B24/026C04B14/062C04B40/0039C04B2111/76C04B2201/50C04B14/06C04B18/08C04B2103/302C04B2103/0071C04B12/04C04B22/062Y02W30/91
Inventor 常广利王显利杨旭姣翟晓萌曲广雷
Owner BEIHUA UNIV