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Concrete water reducing agent prepared from waste leather slag and preparation method of concrete water reducing agent

A technology of concrete water reducing agent and waste dander, which is applied in the field of concrete admixtures, can solve the problems of difficult disposal of waste dander, waste of resources, environmental pollution, etc. Effect

Active Publication Date: 2014-12-24
江苏硕泰建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] my country has now become a major leather producer in the world, and a huge amount of waste dander is produced every year. These waste dander are difficult to deal with. At present, they are mainly disposed of by burial, incineration, etc., which not only causes a huge waste of resources, but also produces a lot of environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The embodiment of the present invention provides a method for preparing a concrete water-reducing agent by using waste swarf. The method is implemented by the following steps:

[0042] Step 1: Degradation of waste dander:

[0043] Take 1000 parts of clean waste dander by mass, add 200 parts of water, heat to 35℃, add 0.5 part of penetrant JFC, stir for 1 hour, then adjust the pH to 9.5 with 40% by mass sodium hydroxide, add 1 A portion of 2709-alkaline protease was incubated and stirred for 6 hours to obtain a solution for degrading waste dander, which was lowered to room temperature for later use;

[0044] Step 2: Preparation of water reducing agent:

[0045] Add 30 parts of 36% by mass formaldehyde to the degraded dandruff solution prepared in step 1, heat up to 40°C, add 2 parts of 40% by mass sodium hydroxide solution, and add them in portions within 30 minutes 27~30 parts of urea, add 12 parts of sodium sulfite, heat up to 60℃, keep the temperature for 5 hours, cool to 30...

Embodiment 2

[0047] The embodiment of the present invention provides a method for preparing a concrete water-reducing agent by using waste swarf. The method is implemented by the following steps:

[0048] Step 1: Degradation of waste dander:

[0049] Take 120 parts of clean waste dander according to mass parts, add 240 parts of water, heat to 40℃, add 1 part of penetrant JFC, stir for 1.5 hours, then adjust the pH to 10.5 with 40% by mass sodium hydroxide, add 1.2 parts 2709-Alkaline protease, heat and stir for 8 hours to obtain a solution for degrading waste dander, and lower it to room temperature for use;

[0050] Step 2: Preparation of water reducing agent:

[0051] Add 40 parts of 36% by mass formaldehyde to the degraded dandruff solution prepared in step 1, heat up to 50°C, add 5 parts of 40% by mass sodium hydroxide solution, and add them in batches within 60 minutes After adding 30 parts of urea, add 16 parts of sodium sulfite, heat up to 80℃, keep for 7 hours, and cool to 25~30℃. Add 6 p...

Embodiment 3

[0053] The embodiment of the present invention provides a method for preparing a concrete water-reducing agent by using waste swarf, which is realized by the following steps:

[0054] Step 1: Degradation of waste dander:

[0055] Take 110 parts of clean waste dander according to mass parts, add 220 parts of water, heat to 37.5℃, add 0.75 parts of penetrant JFC, stir for 1.25 hours, then adjust the pH to 10 with 40% mass fraction of sodium hydroxide, add 1.1 parts 2709-Alkaline protease, heat and stir for 7 hours to obtain a solution for degrading waste dander, which is lowered to room temperature for use;

[0056] Step 2: Preparation of water reducing agent:

[0057] Add 35 parts of 36% by mass formaldehyde to the degraded dandruff solution prepared in step 1, heat up to 45°C, add 3.5 parts of 40% by mass sodium hydroxide solution, and add them in 45 minutes. 58 parts of melamine, after adding, the reaction is kept for 45 minutes, then 8 parts of sodium bisulfite are added, the tempe...

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Abstract

The invention discloses a concrete water reducing agent prepared from waste leather slag. The concrete water reducing agent is prepared from the following materials in parts by mass: 100-120 parts of clean waste leather slag, 200-240 parts of water, 0.5-1 part of a permeating agent JFC, 1-1.2 parts of 2709-alkaline protease, 30-40 parts of formaldehyde with the mass percentage of 36%, 2-5 parts of a sodium hydroxide solution with the mass percentage of 40%, 4-6 parts of sodium tripolyphosphate, a modifier and a sulfonation reagent. The invention further discloses a preparation method of the concrete water reducing agent prepared from the waste leather slag; the concrete water reducing agent prepared by the preparation method is high in water reducing efficiency; the preparation technology is unique, and the usability is high; a new way is supplied to recycling the waste leather slag produced by a leather enterprise, and a new raw material is provided for preparation of the water reducing agent.

Description

Technical field [0001] The invention belongs to the field of concrete admixtures, and in particular relates to a concrete water reducer prepared by using waste dander and a preparation method thereof. Background technique [0002] Water reducer is an admixture that must be used in the modern concrete mixing construction process. Its function is to reduce the water consumption during concrete mixing, increase the fluidity of concrete and improve the strength of concrete. [0003] At present, the consumption of concrete in my country is more than 4 billion cubic meters per year, and a large amount of water reducing agent needs to be consumed every year. [0004] The currently used water reducers are mainly naphthalene sulfonate water reducers, sulfamate water reducers, polycarboxylic acid water reducers, etc. The main raw materials for the preparation of these water reducers are derived from petrochemical products. The ever-decreasing petroleum resources have had a great impact on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/30
Inventor 吕生华赵浩然邓丽娟孙世彧
Owner 江苏硕泰建筑科技有限公司
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