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Concrete water reducing agent and preparation method thereof

A concrete water reducer and retarder technology, applied in the field of concrete additives, can solve the problems of poor plasticizing effect, single performance, poor water reducing performance, etc., to improve crack resistance, compressive and flexural resistance, and improve bleeding Effect

Inactive Publication Date: 2017-05-24
戚明海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The water-reducing agents currently used in the market have the disadvantages of large dosage, poor water-reducing performance, and poor plasticizing effect, and the performance of concrete water-reducing agents on the market is single, only has the function of water-reducing, and must be compounded with other materials to be effective. change its adaptability and is difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A concrete water reducer, which is made by mixing the following raw materials in parts by weight:

[0033] 20 parts melamine

[0034] 13 parts of sulfamic acid

[0035] 4 parts acrylamide

[0036] Sodium carboxymethyl cellulose 1 part

[0037] 5 parts ferrous sulfate

[0038] Methanol 10 parts

[0039] Animal waste hair hydrolyzate 3 parts

[0040] Sodium Gluconate 20 parts

[0041] 2 parts aluminum sulfate

[0042] 40 parts of water.

[0043] A preparation method of concrete water reducer, comprising the steps of:

[0044] (1) Add melamine, sulfamic acid, acrylamide, sodium carboxymethylcellulose, ferrous sulfate, low-molecular alcohol and aluminum sulfate in the reaction kettle in sequence, heat and stir to 30°C, and keep warm for 20 minutes;

[0045] (2) Add retarder to the solution in step (1), keep the temperature at 30°C, keep stirring for 30 minutes, add air-entraining agent to the solution, and stir for 30 minutes;

[0046] (3) Add water to the solutio...

Embodiment 2

[0048] A concrete water reducer, which is made by mixing the following raw materials in parts by weight:

[0049] 30 parts melamine

[0050] 15 parts of sulfamic acid

[0051] 2 parts acrylamide

[0052] Sodium carboxymethyl cellulose 3 parts

[0053] 1 part ferrous sulfate

[0054] Ethylene glycol 5 parts

[0055] Sodium dodecylbenzene sulfonate 7 parts

[0056] Sodium Gluconate 10 parts

[0057] 4 parts aluminum sulfate

[0058] 20 parts of water.

[0059] A preparation method of concrete water reducer, comprising the steps of:

[0060] (1) Add melamine, sulfamic acid, acrylamide, sodium carboxymethyl cellulose, ferrous sulfate, low molecular weight alcohol and aluminum sulfate in the reaction kettle in sequence, heat and stir to 50°C, and keep warm for 20 minutes;

[0061] (2) Add retarder to the solution in step (1), keep the temperature at 50°C, keep stirring for 30 minutes, add air-entraining agent to the solution, and stir for 30 minutes;

[0062] (3) Add wate...

Embodiment 3

[0064] A concrete water reducer, which is made by mixing the following raw materials in parts by weight:

[0065] 40 parts of melamine

[0066] 10 parts of sulfamic acid

[0067] 3 parts acrylamide

[0068] Sodium carboxymethyl cellulose 5 parts

[0069] 3 parts ferrous sulfate

[0070] Glycerol v 15 parts

[0071] Air-entraining agent 10 parts

[0072] Sodium Gluconate 15 parts

[0073] Aluminum sulfate 5 parts

[0074] 50 parts of water.

[0075] Wherein, the air-entraining agent is a mixture of animal waste hair hydrolyzate and sodium dodecylbenzenesulfonate in a mass ratio of 1:2.

[0076] A preparation method of concrete water reducer, comprising the steps of:

[0077] (1) Add melamine, sulfamic acid, acrylamide, sodium carboxymethylcellulose, ferrous sulfate, low-molecular alcohol and aluminum sulfate in the reaction kettle in sequence, heat and stir to 60°C, and keep warm for 20 minutes;

[0078] (2) Add retarder to the solution in step (1), keep the temperatu...

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Abstract

The invention relates to a concrete water reducing agent and a preparation method thereof. The water reducing agent is prepared by mixing the following raw materials in parts by weight: 20-40 parts of melamine, 10-15 parts of sulfamic acid, 2-4 parts of acrylamide, 1-5 parts of sodium carboxymethyl cellulose, 1-5 parts of ferrous sulfate, 5-15 parts of low-molecular alcohol, 3-10 parts of air entraining agent, 10-20 parts of setting retarder, 2-5 parts of aluminum sulfate and 20-50 parts of water. The concrete water reducing agent has the advantages of high water reducing rate, strong adaptability and freeze protection, and is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a concrete water reducer and a preparation method thereof. Background technique [0002] As a new type of material, concrete water reducer can not only improve the level of construction technology, improve the performance of concrete, but also save a lot of cement and manpower and material resources, and has a high value. This is already a recognized fact. [0003] The research on the mechanism of water reduction shows that the water consumption of cement concrete (under the same workability) can be reduced through three functions, namely: dispersion, initial hydration inhibition, and air-entrainment. After the concrete is mixed with water, the system is unstable, and the cement particles are easy to flocculate into agglomerates, so a part of the free water is wrapped in the flocculated cement particles. [0004] The water-reducing agents currently used in the market ...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/30C04B103/60
CPCC04B40/0039C04B2103/302C04B2103/601C04B24/128C04B24/16C04B24/124C04B24/383C04B22/149C04B24/02C04B18/18C04B24/10C04B22/148C04B22/002
Inventor 戚明海
Owner 戚明海
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