Concrete additive for hydraulic engineering

A concrete admixture and water conservancy engineering technology, applied in the field of water conservancy engineering, can solve the problems of non-corrosion resistance, complex formula, and the admixture may not be suitable, and achieve the effect of reducing the water-cement ratio, reducing the penetration rate, and improving the degree of hydration

Active Publication Date: 2016-08-10
GUANGZHOU WATER CONSERVANCY & HYDROPOWER STATION CONSTR ENG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Concrete admixture is a substance that is mixed in the process of mixing concrete to improve the performance of concrete. In order to improve the durability of marine engineering buildings, a variety of concrete admixtures have been disclosed, as disclosed in Chinese patent CN 1328203C A series of anti-salt concrete admixtures, including β-naphthalene sulfonate sodium formaldehyde condensate, sodium sulfate, rosin thermal polymer, magnesium powder, alkylbenzene sulfonate, sodium fluorosilicate, etc. Frost resistance, impermeability, corrosion resistance, and prolonging the service life of engineering structures all have good effects, but sea san

Method used

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  • Concrete additive for hydraulic engineering
  • Concrete additive for hydraulic engineering
  • Concrete additive for hydraulic engineering

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, concrete admixture for hydraulic engineering of the present invention

[0020] Formula (by weight percentage): 30% of beta-naphthalene sulfonate sodium formaldehyde condensate, 26% fatty alcohol polyoxyethylene ether sulfonate sodium, 8% heavy alkylbenzene sulfonate sodium, 20% polyvinyl alcohol, stearin Acid 12% and Sulfate 4%.

[0021] The polyoxyethylene number of the fatty alcohol polyoxyethylene ether sodium sulfonate is 5, and the carbon number of the alkyl group is 16.

[0022] The sulfate is composed of copper sulfate, calcium sulfate and ammonium sulfate in a weight ratio of 1:2:0.6.

[0023] Preparation method: S1. Weigh polyvinyl alcohol and stearic acid, add water 10 times the weight of polyvinyl alcohol, adjust the pH to 10, start stirring and heating, control the temperature at 75°C, react for 3 hours, then stop heating, add Sulphate, stirred for 30 minutes to obtain a gel-like substance, and the gel-like substance was dried at 90-100°C to ...

Embodiment 2

[0025] Embodiment 2, concrete admixture for hydraulic engineering of the present invention

[0026] Formula (by weight percentage): 26% of β-naphthalene sulfonate sodium formaldehyde condensate, 28% of fatty alcohol polyoxyethylene ether sulfonate, 12% of heavy alkylbenzene sulfonate, 18% of polyvinyl alcohol, stearin Acid 10% and Sulfate 6%.

[0027] The polyoxyethylene number of the fatty alcohol polyoxyethylene ether sodium sulfonate is 5, and the carbon number of the alkyl group is 14.

[0028] The sulfate is composed of copper sulfate, calcium sulfate and ammonium sulfate in a weight ratio of 1:3:0.8.

[0029] Preparation method: S1. Weigh polyvinyl alcohol and stearic acid, add water 12 times the weight of polyvinyl alcohol, adjust the pH to 9, start stirring and heating, control the temperature at 80°C, react for 2 hours, then stop heating, add Sulphate, stirred for 20 minutes to obtain a gel-like substance, which was dried at 90-100°C to obtain a white powder;

[00...

Embodiment 3

[0031] Embodiment 3, concrete admixture for hydraulic engineering of the present invention

[0032] Formula (by weight): 32% of β-naphthalene sulfonate sodium formaldehyde condensate, 22% fatty alcohol polyoxyethylene ether sulfonate sodium, 6% heavy alkylbenzene sulfonate sodium, 22% polyvinyl alcohol, stearin Acid 14% and Sulfate 4%.

[0033] The polyoxyethylene number of the fatty alcohol polyoxyethylene ether sodium sulfonate is 5, and the carbon number of the alkyl group is 18.

[0034] The sulfate is composed of copper sulfate, calcium sulfate and ammonium sulfate in a weight ratio of 1:3:0.4.

[0035] Preparation method: S1. Weigh polyvinyl alcohol and stearic acid, add water 11 times the weight of polyvinyl alcohol, adjust the pH to 10, start stirring and heating, control the temperature at 70°C, react for 3 hours, then stop heating, add Sulphate, stirred for 30 minutes to obtain a gel-like substance, and the gel-like substance was dried at 90-100°C to obtain a white...

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Abstract

The invention discloses a concrete additive for hydraulic engineering and belongs to the technical field of hydraulic engineering. The concrete additive includes: 26-32% of a [beta]-sodium naphthalene sulfonate formaldehyde condensate, 22-28% of fatty alcohol-polyoxyethylene ether sodium sulfonate, 6-12% of heavy sodium alkyl benzene sulfonate, 18-22% of polyvinyl alcohol, 10-14% of stearic acid and 4-6% of sulfate. The concrete additive can be applied in sea sand concrete to improve the structure of the sea sand concrete, increases the physical mechanical performances, such as rupture strength, compressive strength and the like, and also improves salt erosion resistance of the sea sand concrete, thereby improving durability and prolonging service life of the sea sand concrete, so that the concrete additive is especially suitable for hydraulic engineering building, such as sea dike and the like.

Description

technical field [0001] The invention belongs to the technical field of hydraulic engineering, and in particular relates to a concrete admixture for hydraulic engineering. Background technique [0002] The total length of China's coastline is 32,000 kilometers, including 18,000 kilometers of mainland coastline and 14,000 kilometers of island coastline. There are many harbors and coastal cities dotted around. A large amount of goods trade is shipped by sea. The port throughput increases year by year. Even the construction of seawalls, seaports, and sea-crossing bridges has also increased rapidly. However, at present, as far as the ordinary cement concrete produced in our country is used for roads and buildings, when it is directly used as a marine structure, even the conventional concrete made of fresh water mixed with fresh water sand and gravel, due to long-term erosion by seawater, its physical properties The mechanical index will be reduced and the service life will be gr...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B22/14C04B24/08C04B24/16C04B24/20C04B24/22
CPCC04B40/0039C04B24/22C04B24/166C04B24/20C04B24/2623C04B24/085C04B22/142
Inventor 赖佑贤赵志杰闫晓满李东文陈伟梁陈键李晓作
Owner GUANGZHOU WATER CONSERVANCY & HYDROPOWER STATION CONSTR ENG
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