Concrete water reducing agent prepared by using waste dander and preparation method thereof

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: 2016-01-13
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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  • Concrete water reducing agent prepared by using waste dander and preparation method thereof
  • Concrete water reducing agent prepared by using waste dander and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The embodiment of the present invention provides a preparation method of using waste dander to prepare concrete water reducer, the method is realized through the following steps:

[0042] Step 1: Degradation of waste dander:

[0043] Take 1000 parts of clean waste dander in parts by mass, add 200 parts of water, heat up to 35°C, add 0.5 part of penetrant JFC, stir for 1 hour, then adjust the pH to 9.5 with 40% sodium hydroxide by mass fraction, add 1 Part 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 subsequent use;

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

[0045] Add 30 parts of formaldehyde with a mass fraction of 36% to the degraded dander solution prepared in step 1, raise the temperature to 40°C, add 2 parts of a 40% sodium hydroxide solution, and add in portions within 30 minutes 27~30 parts of urea, after adding, keep warm for 30 minutes, then...

Embodiment 2

[0047] The embodiment of the present invention provides a preparation method of using waste dander to prepare concrete water reducer, the method is realized through the following steps:

[0048] Step 1: Degradation of waste dander:

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

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

[0051]Add 40 parts of formaldehyde with a mass fraction of 36% to the degraded dander solution prepared in step 1, raise the temperature to 50°C, add 5 parts of a 40% sodium hydroxide solution, and add in portions within 60 minutes Add 30 parts of urea, add 6 parts of sodium sulfite and keep warm for 60 minutes, then add...

Embodiment 3

[0053] The embodiment of the present invention provides a preparation method of using waste dander to prepare concrete water reducer, the method is realized through the following steps:

[0054] Step 1: Degradation of waste dander:

[0055] Take 110 parts by mass of clean waste dander, add 220 parts of water, heat up to 37.5°C, add 0.75 parts of penetrant JFC, stir for 1.25 hours, then use 40% sodium hydroxide to adjust the pH to 10, add 1.1 parts 2709-alkaline protease, insulated and stirred for 7 hours to obtain a solution for degrading waste dander, which was lowered to room temperature for later use;

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

[0057] Add 35 parts of formaldehyde with a mass fraction of 36% to the degraded dander solution prepared in step 1, raise the temperature to 45°C, add 3.5 parts of a 40% sodium hydroxide solution, and add in portions within 45 minutes 58 parts of melamine, add 45 parts of sodium bisulfite and keep warm for 45 minutes, t...

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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-reducing agent prepared from 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 amount of concrete used in our 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 water reducers currently used are mainly naphthalene sulfonate water reducers, sulfamate water reducers, polycarboxylate water reducers, etc. The main raw materials for the preparation of these water reducers come from petrochemical products. With the dwindling of petroleum resources, it has had a great impact...

Claims

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Application Information

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Patent Type & Authority Patents(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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