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Concrete admixture containing steel slag and straw ash and preparation method of concrete admixture

A technology of concrete and external admixture, applied in the field of building materials, can solve the problems of rising soil surface temperature, polluting the air environment, reducing agricultural income, etc., and achieve the effect of improving flexural strength and compressive strength

Inactive Publication Date: 2018-12-11
JIANGSU UNIV OF SCI & TECH IND TECH RES INST OF ZHANGJIAGANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Every summer and autumn, in the vast rural areas of our country, especially in the northern areas dominated by dry farming, we can often see fires and thick smoke burning crop straws, and the air will be filled with polluted air both in villages and cities. There is evidence that the disorderly open-air burning of a large amount of straw is one of the important causes of smog, which seriously pollutes the air environment, which not only affects people's health, but also brings great inconvenience to people's daily transportation.
The burning of straw will cause the temperature of the soil surface to rise, burn the beneficial microorganisms in the soil, have a direct impact on the quality and yield of farmland crops, and reduce agricultural income

Method used

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  • Concrete admixture containing steel slag and straw ash and preparation method of concrete admixture
  • Concrete admixture containing steel slag and straw ash and preparation method of concrete admixture

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preparation example Construction

[0037] ginseng figure 1 As shown, the present invention also discloses a preparation method of concrete external admixture comprising steel slag and straw ash, comprising:

[0038] 300-500 parts of steel slag and 5-10 parts of stearic acid are mixed according to parts by mass and then ground for 10 minutes to 30 minutes to obtain the first mixture. When grinding, stearic acid can play the role of grinding aid, further reducing the average particle size of steel slag;

[0039] Mix 100-200 parts of straw ash and 10-20 parts of water reducer according to parts by mass, stir evenly, and stand at 20°C-30°C for 1h-5h to obtain the second mixture;

[0040] The first mixture, the second mixture, 40-50 parts of fly ash and 20-30 parts of cinder are mixed and stirred evenly to obtain the concrete external admixture.

Embodiment 1

[0043] Concrete external admixture in the present embodiment comprises by mass fraction:

[0044] 500 parts of steel slag; 180 parts of straw ash; 15 parts of water reducing agent; 16 parts of stearic acid; 40 parts of fly ash; 30 parts of cinder.

[0045] Wherein, the average particle size of the steel slag is less than or equal to 50 μm.

[0046] The preparation method of concrete external admixture in the present embodiment comprises:

[0047] Mix 500 parts of steel slag and 15 parts of stearic acid in parts by mass and grind for 25 minutes to obtain the first mixture;

[0048] Mix 180 parts of straw ash and 18 parts of water reducing agent in parts by mass, stir evenly, and let stand at 25°C for 4 hours to obtain the second mixture;

[0049] The first mixture, the second mixture, 40 parts of fly ash and 30 parts of cinder are mixed and stirred evenly to obtain the concrete external admixture.

Embodiment 2

[0051] Concrete external admixture in the present embodiment comprises by mass fraction:

[0052] 400 parts of steel slag; 180 parts of straw ash; 18 parts of water reducing agent; 16 parts of stearic acid; 40 parts of fly ash; 30 parts of cinder.

[0053] Wherein, the average particle size of the steel slag is less than or equal to 50 μm.

[0054] The preparation method of concrete external admixture in the present embodiment comprises:

[0055] Mix 400 parts of steel slag and 16 parts of stearic acid in parts by mass and grind for 30 minutes to obtain the first mixture;

[0056] Mix 180 parts of straw ash and 18 parts of water reducing agent in parts by mass, stir evenly, and let stand at 25°C for 4 hours to obtain the second mixture;

[0057] The first mixture, the second mixture, 40 parts of fly ash and 30 parts of cinder are mixed and stirred evenly to obtain the concrete external admixture.

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Abstract

The invention discloses a concrete admixture containing steel slag and straw ash and a preparation method of the concrete admixture. The concrete admixture comprises the ingredients in parts by mass:300 to 500 parts of steel slag, 100 to 200 parts of straw ash, 10 to 20 parts of water reducer, 10 to 25 parts of stearic acid, 30 to 50 parts of fly ash and 20 to 40 parts of coal cinder. According to the concrete admixture containing the steel slag and the straw ash and the preparation method of the concrete admixture, the concrete admixture with high performance can be prepared from the steel slag, the straw ash and other additives; a large number of amorphous silica in the straw ash is organically combined with ingredients in materials such as the steel slag, the activity of the steel slagcan be excited, and the concrete admixture can be used for remarkably improving the folding strength and compressive strength of concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete external admixture containing steel slag and straw ash and a preparation method thereof. Background technique [0002] Steel slag is a by-product of the steelmaking process, which is composed of various oxides formed by the oxidation of silicon, manganese, phosphorus, sulfur and other impurities in pig iron during the smelting process and salts formed by the reaction of these oxides with solvents . Steel slag contains a variety of useful components: 2% to 8% of metallic iron, 40% to 60% of calcium oxide, 3% to 10% of magnesium oxide, and 1% to 8% of manganese oxide, so it can be used as raw material for iron and steel metallurgy. The mineral composition of steel slag is mainly tricalcium silicate, followed by dicalcium silicate, RO phase, dicalcium ferrite and free calcium oxide. [0003] There are two main ways to comprehensively utilize steel slag as a s...

Claims

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Application Information

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IPC IPC(8): C04B24/08C04B18/14C04B18/10
CPCC04B18/101C04B18/142C04B40/0039C04B2103/302C04B24/085C04B18/08C04B18/06Y02W30/91
Inventor 马剑谢海舰江飞飞王静芳吴春杨
Owner JIANGSU UNIV OF SCI & TECH IND TECH RES INST OF ZHANGJIAGANG