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A modified arsenic sandstone unburned brick

A technology of arsenic sandstone and non-burning bricks, which is applied in the field of modified arsenic sandstone non-burning bricks, which can solve the problems of low diagenetic degree of arsenic sandstone, difficulty in maintaining integrity, and aggravated water collapsibility, so as to achieve low price and promote a virtuous circle , Good frost resistance

Active Publication Date: 2015-12-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that, firstly, there is a large amount of montmorillonite in the fresh sandstone, which swells with water; Friction, mechanical interlocking force and the cementing ability of clay substances are difficult to maintain its integrity, and the loose and porous matrix structure further exacerbates the water collapsibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials were prepared according to the following mass percentages: 70% of arsenic sandstone, 15% of diagenetic admixture (mineral powder) with pozzolanic activity or potential hydraulicity, 5% of general-purpose Portland cement with grade 32.5, diagenetic agent (hydrogen Sodium oxide) 2%, water 8%, firstly mix the arsenic sandstone, mineral powder and general-purpose portland cement with a mixer for 5 minutes in advance, after the water and sodium hydroxide are completely dissolved, add them to the solid, stir slowly for 3 minutes, quickly Stir for 2 minutes. After pressure molding, demould, natural curing, test its water resistance coefficient and compressive flexural strength. Experimental results: the water resistance coefficient is 0.72, the compressive strength is 15MPa, and the flexural strength is 1.5MPa.

Embodiment 2

[0026] The raw materials were prepared according to the following mass percentages: 70% of arsenic sandstone, 15% of diagenetic admixture (silica fume) with pozzolanic activity or potential hydraulicity, 5% of general Portland cement with grade 32.5, diagenetic agent (hydrogen Sodium oxide) 2%, water 8%, firstly mix the arsenic sandstone, mineral powder and general-purpose portland cement with a mixer for 5 minutes in advance, after the water and sodium hydroxide are completely dissolved, add them to the solid, stir slowly for 3 minutes, quickly Stir for 2 minutes. After pressure molding, demould, after curing for 28 days at a relative humidity of 95% and a temperature of 20 degrees, measure its water resistance coefficient and compressive and flexural strength. Experimental results: the water resistance coefficient is 0.71, the compressive strength is 16MPa, and the flexural strength is 2MPa.

Embodiment 3

[0028] The raw materials were prepared according to the following mass percentage ratios: 45% of arsenic sandstone, 26% of diagenetic admixture (mineral powder) with pozzolanic activity or potential hydraulicity, 15% of general-purpose Portland cement with grade 42.5, diagenetic agent (hydrogen Sodium oxide 3%, water glass 3%), water 8%, first mix the sandstone, mineral powder and general-purpose Portland cement with a mixer for 5 minutes in advance, and add the water and sodium hydroxide to the solid after completely dissolving, slowly Stir for 3 minutes, fast for 2 minutes. After pressure molding, demould, after curing for 28 days at a relative humidity of 95% and a temperature of 20 degrees, measure its water resistance coefficient and compressive and flexural strength. Experimental results: the water resistance coefficient is 0.92, the compressive strength is 28MPa, and the flexural strength is 5.5MPa.

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Abstract

The invention discloses a modified soft sandstone baking-free brick, and belongs to the field of a building material. The baking-free brick comprises the following components by mass percent: 10-50% of diagenetic admixture with cinerite activity or latent hydraulicity, 10-15% of universal portland cement, 0.5-40% of diagenetic agent, 8-12% of water and 45-70% of soft sandstone. The method comprises the following steps: mixing the components according to the ratio; carrying out compression molding the components; naturally maintaining, maintaining in a green house under the condition at 30-60 DEG C; carrying out standard maintenance under the conditions that the temperature is 20-30 DEG C and the humidity is greater than 90% or carrying out steam maintenance at the temperature of 60-210 DEG C, so as to obtain the modified soft sandstone baking-free brick. The modified soft sandstone baking-free brick has a good market prospect in the locality, and is low in price, convenient to obtain raw materials, applicable to local promotion, and conducive to promotion of new rural policy of the country.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a modified arsenic sandstone non-fired brick. Background technique [0002] The Yellow River is the mother river of the Chinese clan, which gave birth to the Chinese civilization in history. However, with the change of history, climate change and human activities, the vegetation in the Yellow River Basin has been destroyed, soil erosion has been serious, and a large amount of sediment has flowed into the Yellow River, causing the river bed of the Yellow River to rise rapidly, and even form a suspended river above the ground, seriously threatening people's lives and Property security even restricts local economic development. [0003] Dongsheng District, Zhungeer Banner, Yijinhuoluo Banner, Dalat Banner of Ordos City, Inner Mongolia, and Shenmu and Fugu counties (banners) of Shaanxi Province are the main arsenic sandstone areas in the Yellow River Basin (with an area of ​​about ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/04
Inventor 王立久杨大令张婷婷
Owner DALIAN UNIV OF TECH
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