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Polycarboxylate water reducer

A technology of water reducer and polycarboxylate, applied in the field of polycarboxylate water reducer, can solve problems such as unfavorable promotion and limited source of cerium element raw materials

Inactive Publication Date: 2017-05-24
安徽贯华新材料科技有限公司
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  • Application Information

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Problems solved by technology

CN 106064898 A proposes a preparation process of a modified concrete water reducer, using the joint action of the water reducer and cerium element to improve the performance of the water reducer, but the raw material source of cerium element is limited, which is not conducive to popularization

Method used

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Embodiment Construction

[0017] A kind of polycarboxylate water reducing agent, preparation method comprises the following steps:

[0018] (1) Put the white mud of papermaking waste into the pulping tank to make a slurry with a solid content of 25%; heat the slurry to 45°C, mix it with corn stalks, and then add sodium lauryl sulfate, After stirring for 60min, dry and extrude into blocks to obtain block materials for subsequent use; the CaCO of papermaking waste white mud 3 The content is 50%, and the residual NaOH is 4%.

[0019] The mass ratio of papermaking waste white mud, corn stalks and sodium lauryl sulfate is 20:18-22:1-2.

[0020] (2) Inject the acid solution into the reaction kettle until it is soaked with the bulk material. After 60 minutes, keep the pressure at 0.3-0.4MPa for 1 hour to obtain the straw hydrolyzate. Use CaO to adjust the pH of the straw hydrolyzate to 6 to obtain the hydrolyzate. standby; the acid concentration is 1.5%;

[0021] (3) After the hydrolyzate is dried, add pot...

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Abstract

The invention discloses a polycarboxylate water reducer. The modified polycarboxylate water reducer is prepared by mixing a pulp of a white clay of a papermaking waste, heating, evenly mixing with a corn straw, then adding lauryl sodium sulfate, stirring, drying, and extruding into blocks to obtain a block material for later use; hydrolyzing, and adjusting the pH value of a straw hydrolysate to 6.0-7.0 with CaO to obtain a hydrolysate for later use; drying, oxidizing and sulfonating the hydrolysate, adding into a polycarboxylate-type water reducer, stirring evenly, and treating through ultrasonic waves for 1-2 hours. The papermaking waste is used to manufacture the water reducer, the waste is well turned into the wealth, the strong base in the papermaking waste pretreats the corn straw, so that the corn straw is better pickled for hydrolysis; the substances like cellulose produced after the hydrolysis of the corn straw improve the water reducing effect of the water reducer after being oxidized and sulfonated, meanwhile, the polycarboxylate water reducer also plays a role in lubricating the concrete.

Description

technical field [0001] The invention relates to the field of water reducers, in particular to a polycarboxylate water reducer. Background technique [0002] Polycarboxylate superplasticizer is a high-performance superplasticizer and a cement dispersant used in cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. The product is green, non-flammable and non-explosive, and can be safely transported by train and automobile. [0003] The existing polycarboxylate superplasticizer technology is relatively mature, and there is little room for further development. Therefore, in recent years, researchers have mainly carried out research work on new raw materials and new processes. CN 106064898 A proposes a preparation process of a modified concrete water-reducer, which utilizes the joint action of the water-reducer and cerium element to improve the performance of the water-reducer, but the raw material source of cerium element is ...

Claims

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Application Information

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IPC IPC(8): C04B24/16
CPCC04B40/0039C04B2103/302C04B18/0418C04B18/24C04B24/16C04B22/064C04B22/08C04B22/14
Inventor 张媛媛
Owner 安徽贯华新材料科技有限公司
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