Polymer modification blast-furnace slag powder material

A technology of blast furnace slag powder and polymer, which is applied in cement production, etc., can solve the problems of high brittleness and low flexural strength, and achieve the effects of low elastic modulus, excellent impermeability, and high ultimate flexural strength

Inactive Publication Date: 2016-07-27
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a modified blast furnace slag powder material, which solves the shortcomings of low flexural strength and high brittleness in the application of alkali-activated blast furnace slag powder, and toughens the modified blast furnace slag powder, thereby broadening the blast furnace slag powder material. The application field, improve its use value

Method used

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  • Polymer modification blast-furnace slag powder material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The ingredients are formulated according to the following mass percentages: 22.067% of blast furnace slag powder, 66.4% of quartz sand, 1.3% of sodium hydroxide, 4.0% of sodium silicate aqueous solution, 6.2% of water, and 0.033% of sodium polyacrylate. Polyacrylamide is used as a comparison, and the dosage is also 0.033%, while no high polymer is used as a blank sample group. According to the above ratio, combined with the preparation method of polymer-modified blast furnace slag powder material, curing to 28d.

[0025] The WAY-300 automatic flexural and compressive testing machine was used to measure the compressive and flexural strength, and the Instron1394 universal servo instrument was used to measure the flexural toughness. The results are shown in Table 1 and Table 2. The indentation ratio indicates the index of mortar flexibility and toughness. The lower the indentation ratio, that is, relatively speaking, the higher the flexural strength, which also reflects th...

Embodiment 2

[0033] The ingredients are formulated according to the following mass percentages: 22.067% of blast furnace slag powder, 66.4% of quartz sand, 1.3% of sodium hydroxide, 4.0% of sodium silicate aqueous solution, 6.2% of water, and 0.033% of sodium polyacrylate. Polyacrylamide is used as a comparison, and the dosage is also 0.033%, while no high polymer is used as a blank sample group.

[0034] According to the above ratio, combined with the preparation method of polymer modified blast furnace slag powder material, curing for 28 days, using the WAY-300 automatic flexural and compressive testing machine to measure the compressive and flexural strength, and the Instron1394 universal servo instrument to measure the flexural toughness , the results are shown in Table 3 and Table 4.

[0035] Table 3 Mechanical properties of different polymer modified slag powder

[0036]

[0037] According to Table 3, sodium polyacrylate and polyvinyl alcohol can be obtained to modify blast furna...

Embodiment 3

[0042] The ingredients are formulated according to the following mass percentages: 25.925% of blast furnace slag powder, 61.4% of quartz sand, 1.9% of sodium hydroxide, 4.7% of sodium silicate aqueous solution, 6.0% of water, and 0.075% of sodium polyacrylate. At the same time, no high polymer is added as a blank sample group. Combined with the preparation method of polymer modified blast furnace slag powder material, curing until 28d, using WAY-300 automatic flexural and compressive testing machine to measure the compressive and flexural strength of 3d, 7d, 28d, and explore its performance under this ratio Toughening effect, the results are shown in Table 5.

[0043] table 5

[0044]

[0045]According to Table 5, it can be obtained that sodium polyacrylate has a modification effect on blast furnace slag powder. Compared with the blank sample, the flexural strength of 3d, 7d, and 28d increased by 42.05%, 45.76%, and 33.86%, respectively. It can be seen that polyacrylic aci...

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Abstract

The invention discloses a polymer modification blast-furnace slag powder material.The material is prepared from, by weight, 16.1-25.9% of blast furnace slag powder, 61.4-71.7% of silica sand, 1.0-1.9% of sodium hydroxide, 3.3-4.7% of a sodium silicate water solution, 6.0-7.9% of water and 0.01-0.75% of high-molecular polymer.The high-molecular polymer is sodium polyacrylate or polyacrylamide or polyvinyl alcohol.The polymer modification blast-furnace slag powder material has the high ultimate bending strength, high bending toughness and low elastic modulus, the deformation performance can be remarkably improved, the defects that the breaking strength is low and the brittleness is large are overcome, and meanwhile the polymer modification blast-furnace slag powder material has the advantages of resisting high temperature, resisting chemical corrosion, being good in anti-permeability, low in shrinkage rate and the like.

Description

technical field [0001] The invention belongs to the field of building material science, and in particular relates to a polymer modified blast furnace slag powder material. Background technique [0002] Blast furnace slag powder is an alkali-activated geopolymer cementitious material and is an excellent "green environmental protection material". However, a large number of studies have shown that although alkali-activated blast furnace slag powder has good mechanical properties, it has low flexural strength. , The disadvantage of greater brittleness, which also coincides with other inorganic non-metallic materials. This shortcoming seriously restricts the application of blast furnace slag powder in modern concrete projects that have higher and stricter requirements for bending and tensile strength, stiffness, ductility, toughness and crack control ability. Therefore, how to reasonably and efficiently modify blast furnace slag powder to increase its toughness is particularly i...

Claims

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Application Information

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IPC IPC(8): C04B7/153
CPCC04B7/1535C04B12/005Y02P40/10
Inventor 陈潇李正周明凯梁雄毅周菲
Owner WUHAN UNIV OF TECH
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