Super-slowly coagulating water reducer of concrete and its prepn.

A water-reducing agent and super-retarding technology, applied in the textile industry wastewater treatment and other directions, can solve problems such as incompatibility, and achieve the effects of small dosage, good adaptability and high water-reducing rate

Active Publication Date: 2006-09-20
SHANGHAI JIANWEI CULTURAL HERITAGE CONSERVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical route of the present invention is: in view of the characteristics and main problems of the current ordinary super retarder, and the incompatibility existing when used in combination with different types of concrete water reducing agents, use the excellent phosphate in the inorganic retarder Chelation, retarding effect, organic reta

Method used

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  • Super-slowly coagulating water reducer of concrete and its prepn.
  • Super-slowly coagulating water reducer of concrete and its prepn.

Examples

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Comparison scheme
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Example Embodiment

[0034] Example 1

[0035] Weigh 120g of modified lignosulfonate water reducer powder, dissolve it into a liquid water reducer with a concentration of 25%, and then mix 2g of ethylene into the liquid modified lignosulfonate water reducer Diamine-tetramethylphosphonic acid and 40g of phosphine butane tricarboxylic acid are stirred at a speed of 30 revolutions per minute and stirred for 20 minutes to obtain the super retarding water reducer. When in use, it is formulated into a certain concentration of aqueous solution in proportion.

Example Embodiment

[0036] Example 2

[0037] Weigh 100g of naphthalene sulfonate water reducer powder, dissolve it into a liquid water reducer with a concentration of 25%, and then mix 2 g of ethylene diamine-tetramethyl into the liquid naphthalene sulfonate water reducer Phosphonic acid, 80 g of phosphine butane tricarboxylic acid, 0.08 g of sodium lauryl sulfate are stirred at a speed of 20 revolutions per minute and stirred for 40 minutes to obtain the super retarding water reducer. When in use, it is formulated into a certain concentration of aqueous solution in proportion.

Example Embodiment

[0038] Example 3

[0039] Weigh 99.2g of 25% polycarboxylic acid liquid water reducer, mix with 48g of ethylene diamine-tetramethylphosphonic acid, 2g of phosphine butane tricarboxylic acid, and 0.4g of sodium lauryl sulfate. , Rotating speed 30 rpm, stirring for 30 minutes, you can get super retarding water reducing agent. When in use, it is formulated into a certain concentration of aqueous solution in proportion.

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PUM

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Abstract

This invention relates to the field of concrete complex super-retarding water reducers. The super-retarding water reducer in this invention has a mass-fraction composition as follows: 0.5~25% ethylene polyamine alkyl phosphonic acid or its salt, 0.5~20% phosphonobutane tricarboxylic acid, 20~50% water reducers, 0~ 0.5% sodium dodecyl sulphates and water as the rest. There are two preparation methods in this invention, one is that, components mentioned above are directly mixed with water reducers at those mass fractions so as to form super-retarding water reducers; the other is that, super-retarding components are added during water reducer preparation. The super-retarding water reducers in this invention are compatible with different kinds of water reducers. They perform extraordinary retarding activities without any side effect.

Description

technical field [0001] The invention relates to the field of super-retarding superplasticizers for composite concrete. Background technique [0002] At present, the concrete retarders used at home and abroad are divided into two categories, inorganic and organic. The inorganic type mainly includes borax, zinc oxide, phosphate and metaphosphate, etc. The organic type mainly includes lignosulfonate, hydroxycarboxylic acid (salt), sugars and carbohydrates, polyols and their derivatives, etc. Organic retarders are widely used. However, these retarders have some disadvantages at present. One is that they are only ordinary retarders. When the amount exceeds a certain value, the concrete will have problems such as non-setting and strength decline; The adaptability of the water reducing agent is poor, and sometimes when it is used in combination with the water reducing agent, it may even produce a coagulation-promoting effect; the third is that the adaptability to many domestic ce...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B24/04C04B24/16C02F103/30
Inventor 蒋正武
Owner SHANGHAI JIANWEI CULTURAL HERITAGE CONSERVATION TECH CO LTD
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