Acid rain corrosion resisting concrete additive and preparation method thereof

A technology of concrete and admixtures, which is applied in the field of building materials, can solve problems such as the inability to meet the design requirements for acid rain erosion resistance, and achieve the effects of improving acid rain erosion resistance, reducing intrusion ability, improving strength and impermeability

Inactive Publication Date: 2013-08-28
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, using the traditional technical route to configure high-acid-rain-resistant concrete will not be able to meet the relevant regulations of the relevant state departments on the design requirements of the actual concrete structure anti-acid rain performance

Method used

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  • Acid rain corrosion resisting concrete additive and preparation method thereof
  • Acid rain corrosion resisting concrete additive and preparation method thereof
  • Acid rain corrosion resisting concrete additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0046] 1, the preparation method of high anti-acid rain erosion concrete admixture, it comprises the steps:

[0047] 1) select raw material and prepare this admixture by the material proportioning shown in table 1

[0048] Raw material ratio in the admixture of table 1

[0049]

Example

Finely ground slag: high calcium fly ash: silica fume

(parts by weight)

polymer

organic fiber

functional enhancement components

1

100∶200∶30

3.5％

1.2％

5％

2

100∶225∶20

4％

1.8％

6％

[0050] (Note: The ground slag, high-calcium fly ash and silica fume are selected from mineral materials that meet the above-mentioned respective technical indicators. After drying, the moisture content is 0.5%; the polymer, organic fiber and functional strengthening components The amount added is the mass percentage of the ground slag, high-calcium fly ash and silica fume mass)

[0051] 2) P...

Embodiment 3

[0076] Embodiment 3: high anti-acid rain erosion concrete admixture, it is mainly prepared from ground slag, high calcium fly ash, silica fume, polymer, organic fiber and functional strengthening component materials, and the weight parts of each raw material The numbers are: ground slag: 100 parts, high-calcium fly ash: 250 parts, silica fume: 40 parts, the addition amount of polymer, organic fiber and functional strengthening component is respectively ground slag, high-calcium fly ash and 3%, 1.5% and 6% of the total mass of silica fume; the functional strengthening component is composed of an activator and a dispersant at a mass ratio of 1:0.03, and the activator is alkali silicic acid with a solid solution ratio of 1:2 A binary system composed of saline solution and sodium hydroxide at a mass ratio of 1:0.08; the dispersant is a polycarboxylate hyperdispersant with a solid content of 30%.

[0077] The ground slag is selected from the commercially available blast furnace wat...

Embodiment 4

[0084] Embodiment 4: high anti-acid rain erosion concrete admixture, it is mainly prepared from ground slag, high calcium fly ash, silica fume, polymer, organic fiber and functional strengthening component materials, and the weight parts of each raw material The numbers are: ground slag: 100 parts, high-calcium fly ash: 180 parts, silica fume: 15 parts, and the addition amounts of polymer, organic fiber and functional strengthening components are respectively ground slag, high-calcium fly ash and 4.5%, 1% and 4.5% of the total mass of silica fume; the functional strengthening component is composed of an activator and a dispersant at a mass ratio of 1:0.07, and the activator is alkali silicic acid with a solid solution ratio of 1:1.5 A binary system composed of saline solution and sodium hydroxide at a mass ratio of 1:0.1; the dispersant is a polycarboxylate hyperdispersant with a solid content of not less than 30%.

[0085] The ground slag is selected from the commercially ava...

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Abstract

The invention relates to an acid rain corrosion resisting concrete additive and a preparation method thereof. The acid rain corrosion resisting concrete additive is characterized by mainly comprising the following materials in parts by weight: 100 parts of grounded furnace slag, 150-300 parts of high-lime fly ash, 10-50 parts of siliceous dust, a polymer, organic fiber and a function intensifying component, and the addition quantities of the polymer, the organic fiber and the function intensifying component respectively account for 3-5%, 0.5-2.5% and 3-8% of the total mass of the grounded furnace slag, the high-lime fly ash and the siliceous dust, wherein the function intensifying component is a chemical additive prepared by compounding an exciting agent and a dispersing agent in the mass ratio of 1:0.02-0.08. The acid rain corrosion resisting concrete additive is applied to concrete in acid rain environment, can obviously increase the acid rain corrosion resistance of the concrete, can extend the service life of concrete structures, and is low in price.

Description

technical field [0001] The invention belongs to building materials, and in particular relates to a concrete admixture with high resistance to acid rain erosion and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, air pollution is increasing day by day, and acid rain has become a common weather phenomenon in many countries and regions in the world, causing serious erosion and damage to large concrete structures such as roads and bridges in its environment. Therefore, the ability of concrete to resist acid rain erosion and damage in acid rain environment will directly affect the service life of concrete structures in the environment. [0003] For the concrete structure under the acid rain environment, the current measures to improve its corrosion resistance are divided into three categories: one is to single-mix or double-mix auxiliary gelling materials (such as slag, fly ash, silica fume, etc.) in cement concrete. ), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B16/06C04B24/26C04B111/23
CPCC04B24/2652C04B28/08C04B2111/23Y02W30/91C04B16/0633C04B16/0658C04B18/08C04B18/146C04B20/023C04B40/0028C04B40/0067C04B2103/408
Inventor 王凯陈梦成
Owner EAST CHINA JIAOTONG UNIVERSITY
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