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Concrete air-entrainer

An air-entraining agent and concrete technology, applied in the field of concrete air-entraining agent, can solve the problems of poor adaptability, inability to meet the air-entraining requirements of concrete and special concrete, and low air-entraining efficiency, so as to achieve high bubble stability and improve fresh-mix performance Hardening durability, strong water solubility effect

Active Publication Date: 2007-09-19
BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of the existing concrete air-entraining agents such as poor adaptability, low air-entraining efficiency, and inability to meet the air-entraining requirements of various admixture concretes and special concretes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] An example of preparation is as follows:

[0032] Control substance 1:

[0033] Add 250g of water to a 1000ml reaction kettle, heat up to 90°C, add 30g of sodium carbonate, dissolve, add 100g of small pieces of rosin in the state of boiling water,

[0034] Add in portions to dissolve completely. After cooling to 50°C, about 40g of 30% potassium hydroxide solution was added dropwise to adjust the concentration of the obtained air-entraining agent solution to 30±1%, and the pH value was 9-10.

[0035] Control substance 2:

[0036] Add 250g of water into a 1000ml reaction kettle, raise the temperature to 90°C, add 25g of sodium carbonate, dissolve, add 100g of small pieces of rosin in boiling water, add in portions to make it completely dissolve. After cooling down to 60°C, add about 40g of 30% potassium hydroxide solution dropwise, add 5g of triethanolamine, stir for 30min, add about 40g of cooling water dropwise at a uniform speed, adjust the concentration of the obta...

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Abstract

The preparation method for a concrete air-entrainer comprises: 1) putting the rosin, tallol, triterpenoid saponin and lignin by weight ratio into a reaction kettle to heat and fuse while stirring evenly to prepare the mixed resin A; 2) adding the maleic anhydride and quinone to modify the resin A and obtain the resin B; 3) dripping the carbowax or the mixture of carbowax and pentaerythrite for graft esterification reaction at 180~250Deg to obtain the product C; 4) cooling the kettle temperature to 50~100Deg, adding foam stabilizer D and E; 5) cooling the temperature to 20~95Deg, dripping lye and water to control the solid material in solution as 29~31% and pH value as 9~11, and obtaining the final product. This invention has wide application.

Description

technical field [0001] The invention relates to a concrete air-entraining agent. Background technique [0002] Concrete air-entraining agent can effectively improve the performance of freshly mixed concrete, improve the workability of concrete, reduce the bleeding performance, and greatly improve the anti-freeze and anti-seepage performance of concrete. It is suitable for important engineering concrete such as hydraulic engineering, port engineering and road bridges. It is especially important for concrete roads and bridges where deicing salt is sprinkled in severe cold areas. In addition, fly ash is often used as an active admixture in the preparation of these concretes to improve the workability of fresh concrete and reduce the tendency of thermal shrinkage and cracking of mass concrete. However, it has been found that some fly ash with a high loss on ignition often reduces the air-entraining effect of the air-entraining agent because it contains unburned carbon particles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/00C04B24/24C04B103/30
Inventor 缪昌文游有鲲刘加平
Owner BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD
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