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Renewable plant cellulose water reducing agent for cements

A technology of plant cellulose and water reducing agent, applied in the field of cement additives, to achieve the effects of good dispersion, strong self-repairing ability, and high water reducing rate

Active Publication Date: 2013-04-24
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in view of the fact that the existing cement superplasticizer products and technologies are difficult to have many advantages such as high efficiency, low carbon, and energy saving, the development of a low-carbon, high-efficiency, energy-saving cement superplasticizer and its preparation technology is of great significance and far-reaching impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 10g of plant cellulose extracted from apple pomace to 100g of 95% ethanol, then add potassium hydroxide solution with a concentration of 45%, and stir for 60min at room temperature; then add 8g of ethanol solution with a concentration of 80% Stir and react with oxyacetic acid at 55°C for 40 minutes; then add 10 g of solid potassium hydroxide, continue stirring for 30 minutes, and add 8 g of 80% ethanol solution and oxyacetic acid respectively, repeat the previous step twice, and use 100 g The product obtained was dissolved in ethanol at 50°C, filtered and evaporated to dryness. A renewable plant cellulose cement water reducer provided by the invention is prepared.

Embodiment 2

[0027] Add 10g of plant cellulose extracted from old cotton to 135g of 95% ethanol, then add 50% potassium hydroxide solution, stir at room temperature for 100min; then add 12g of 80% ethanol solution With oxyacetic acid, stir and react at 60°C for 60 minutes; then add 12g of solid potassium hydroxide, continue stirring for 50 minutes, and add 12g of 80% ethanol solution and oxyacetic acid respectively, repeat the previous step 3 times, use 150g The product obtained was dissolved in ethanol at 50°C, filtered and evaporated to dryness. A renewable plant cellulose cement water reducer is prepared.

Embodiment 3

[0029] Add 10g of plant cellulose extracted from apple pomace to 100g of 95% ethanol, then add 40% sodium hydroxide solution, stir at room temperature for 70min; then add 10g of 80% ethanol solution With oxyacetic acid, stir and react at 45°C for 30 minutes; then add 11g of solid sodium hydroxide, continue stirring for 40 minutes, and add 10g of 80% ethanol solution and oxyacetic acid respectively, repeat the previous step 3 times, use 150g B Dissolve the obtained product at 50°C, filter and evaporate to dryness. A renewable plant cellulose cement water reducer is prepared.

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PUM

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Abstract

The present invention discloses a renewable plant cellulose water reducing agent for cements, and the water reducing agent consists of the following components: plant cellulose, high-concentration alkali, oxidizing agents and a solvent; wherein the weight ratio of the plant cellulose, the solvent and the high-concentration alkali is 1:10-15:1.5-3; the weight ratio of the plant cellulose, the solvent and the oxidizing agents is 1:0.8-1.2:0.8-1.2; and the weight ratio of the plant cellulose and a solid alkali is 0.8: 1.2. The invention also discloses a preparation method for the renewable plant cellulose water reducing agent for cements. The water reducing agent provided by the invention is high in water absorption efficiency, and low-carbon and environmentally friendly in components and the preparation process.

Description

technical field [0001] The invention belongs to the field of cement additives, and in particular relates to a renewable plant cellulose cement water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that reduces the water consumption of concrete mixing under the premise of maintaining the performance of concrete. As an additive in cement concrete technology, cement water reducer can improve the dissolution and dispersion effect of water, and improve the workability of cement and water. After development in recent years, lignosulfonate sodium salt superplasticizer (ML), naphthalene superplasticizer (SNF), sulfonated melamine resin aliphatic superplasticizer (SMF), sulfamate It is a series of cement superplasticizers mainly represented by superplasticizers (ASP) and polycarboxylate superplasticizers (PC). Except for lignosulfonate sodium salt superplasticizer series, these cement superplasticizers show a high water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/30
Inventor 李军代刘钢闫国杰邓国民徐韵淳李交夏庆宇邱轶王腾飞袁月黄兴源
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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