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Concrete containing high-activity slag powder and preparation method thereof

A slag powder, high activity technology, applied in the field of concrete, to achieve high lubricating effect, accelerate early hydration speed, and improve the effect of hardness

Inactive Publication Date: 2019-12-27
上海浦盈混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, to find out the reasons for the low activity of slag powder and to seek ways to improve its activity is an urgent problem to be solved.

Method used

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  • Concrete containing high-activity slag powder and preparation method thereof
  • Concrete containing high-activity slag powder and preparation method thereof
  • Concrete containing high-activity slag powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: A kind of concrete containing highly active slag powder, each component and its corresponding weight parts are as shown in Table 1 and Table 2, and are prepared by the following steps:

[0050] Step 1, select high-quality slag of corresponding parts by weight, add grinding aids of corresponding parts by weight, put it into a ball mill and grind at a speed of 120r / min to obtain a specific surface area of ​​500m 2 / kg of slag powder; put potassium sulfate, slaked lime and gypsum into a ball mill for grinding, and then mix with slag powder evenly to obtain highly active slag powder

[0051]Step 2, mixing and stirring the highly active slag powder, coarse aggregate and gypsum evenly to obtain a mixture;

[0052] Step 3, mixing and stirring the mixture obtained in the above steps with cement, 75% water, and water reducing agent;

[0053] Step 4, mixing and stirring the mixture obtained in the above steps with the remaining water evenly to obtain concrete conta...

Embodiment 2-6

[0055] Example 2-6: A concrete containing highly active slag powder. The difference from Example 1 is that the components and their corresponding parts by weight are shown in Table 1 and Table 2.

[0056] Each component and parts by weight thereof in table 1 embodiment 1-6

[0057]

[0058] Each component of high activity slag powder and its weight parts in the embodiment 1-6 of table 2

[0059]

Embodiment 7

[0060] Embodiment 7: A kind of concrete containing highly active slag powder, the difference from embodiment 1 is that 1 part of fly ash is added in step 2.

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Abstract

The invention discloses concrete containing high-activity slag powder and a preparation method of the concrete, and relates to the technical field of concrete. The concrete containing the high-activity slag powder is characterized by comprising the following components in parts by weight: 20-25 parts of cement; 10 to 15 parts of high-activity slag powder; 75 to 100 parts of a coarse aggregate; 0.1to 1 part of gypsum; 15 to 30 parts of water; and 0.4 to 1 part of a water reducing agent; wherein the high-activity slag powder comprises the following components in parts by weight: 10 parts of slag; 0.01 to 0.05 part of potassium sulfate; 0.01 to 0.04 part of slaked lime; and 0.01-0.02 part of a grinding aid. The concrete prepared according to the formula provided by the invention has the advantages of high strength and good workability.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a concrete containing highly active slag powder and a preparation method thereof. Background technique [0002] Slag powder is the abbreviation of granulated blast furnace slag powder. It is a high-quality concrete admixture. It is made of granulated blast furnace slag that meets the GB / T203 standard. body. [0003] Slag powder is a good cementitious material, especially S105 high-grade slag powder has high activity. The concrete added with high-quality slag powder has high strength, good workability, and quick demoulding, which can improve the impermeability and frost resistance of concrete and increase slump. [0004] At present, the slag powder used in the market is less than the national standard S105, with a market share of less than 5%; the market share of S95 slag powder is only less than 35%, which cannot meet the needs of the construction market, espec...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50
Inventor 王仲铖
Owner 上海浦盈混凝土有限公司
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