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Method for preparing high efficient concrete water reducing agent using heavy washing oil

A high-efficiency water-reducing agent and oil-washing technology, which is applied in the field of preparing high-efficiency concrete water-reducers by using heavy washing oil, can solve environmental pollution problems in the coking industry, and achieve pollution problems, low production costs, flexural strength and anti-corrosion The effect of increasing the compressive strength

Inactive Publication Date: 2006-01-04
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing high-efficiency concrete water reducer by using heavy washing oil to solve the problem of environmental pollution in the coking industry, and to provide a high-efficiency concrete water reducer for the construction industry

Method used

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  • Method for preparing high efficient concrete water reducing agent using heavy washing oil
  • Method for preparing high efficient concrete water reducing agent using heavy washing oil
  • Method for preparing high efficient concrete water reducing agent using heavy washing oil

Examples

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Embodiment 1

[0027] Embodiment 1: in conjunction with accompanying drawing, in the there-necked bottle of 500ml, drop into 100g and be the heavy washing oil of 0.5545mol, be heated to 90 ℃; Be 1: 1.4 to add 77.63g by the mol ratio of heavy washing oil and the vitriol oil, namely 42ml of concentrated sulfuric acid was reacted at 120°C for 2.5 hours; then the temperature was lowered to 110°C, and the molar ratio of heavy washing oil to water was 1:2, and 20ml of water was added to make the acidity reach 28%, hydrolyzed for 0.5 hours, and then concentrated Sulfuric acid 4ml, make the acidity reach 30%; cool down to 85°C, add 33.3g, that is, 33.3ml formaldehyde solution according to the molar ratio of heavy washing oil and formaldehyde as 1:0.8, and react at 95°C for 3 hours; finally add The caustic soda solution with a concentration of 40% is adjusted to a pH value of 8, and then cooled, filtered and dried to obtain a water reducer. When the water-cement ratio is 0.3 and 1 to 1.5% water reduc...

Embodiment 2

[0028] Embodiment 2: In conjunction with the accompanying drawings, put 100g, that is, 0.5545mol of heavy washing oil into a 500ml three-necked bottle, and heat it to 85°C; add 72g, that is, 42ml of concentrated Sulfuric acid, react at 120°C for 3 hours; then lower the temperature to 110°C, add 10ml of water to make the acidity reach 28% according to the molar ratio of heavy washing oil and water at 1:1, hydrolyze for 0.5 hours, and then add 4ml of concentrated sulfuric acid to make the acidity reach 31%; cool down to 85°C, add 37.3g, i.e. 33.3ml, of formaldehyde solution at a molar ratio of heavy washing oil to formaldehyde of 1:0.9, and react for 3 hours at a temperature of 95°C; finally add caustic soda solution, Adjust the pH value to 7, then cool and dry to obtain the water reducer. When the water-cement ratio is 0.3 and 1 to 1.5% water reducer is added to the cement, the fluidity of the cement paste can reach 240mm. When the amount in concrete is 1-1.5% of the cement am...

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Abstract

The preparation process of high efficiency concrete water reducing agent with heavy washing oil includes the following steps: calculating the mole numbers of various components in the heavy washing oil, including fluorene, fluorene oxide, methyl fluorene oxide, anthranylphenanthrene, etc. and the total mole numbers; heating heavy washing oil and adding sulfuric acid to produce sulfonation reaction; cooling, hydrolysis and adding sulfuric acid to regulate acidity; dropping formaldehyde; condensaton and neutralization and regulating pH value; and finally cooling, filtering and drying to obtain the water reducing agent. Thus produced concrete water reducing agent has water reducing rate as high as 20-30 %, and can raise the breaking strength and compression strength of concrete greatly.

Description

a technical field [0001] The invention relates to a preparation method of a novel concrete water reducer, in particular to a method for preparing a high-efficiency concrete water reducer by using heavy washing oil. Two background technology [0002] Water reducing agent, also known as superplasticizer, is an anionic surfactant, which does not chemically react with cement itself, but improves the workability of concrete through the action of surfactant, and has the effect of greatly reducing water and enhancing effect. The existing water reducing agents mainly include lignosulfonate series, naphthalenesulfonic acid series and melamine water-soluble resin series. Most of the raw materials used in the above-mentioned water reducers are chemical products, and the raw materials for preparing naphthalene-based high-efficiency water reducers are increasingly scarce, so the production cost is high, and its output is limited by chemical production. On the other hand, high-performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/00C04B24/16
Inventor 崔崇张士华
Owner NANJING UNIV OF SCI & TECH