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Modified polycarboxylate water reducer and production method thereof

A production method and technology of water reducer, applied in the field of modified polycarboxylate water reducer and its production, can solve the problems of inability to effectively prevent the loss of concrete slump, high content of harmful substances, unsatisfactory, etc., and achieve good The effect of comprehensive technical performance advantages and environmental protection features, low content of harmful substances, and large degree of freedom

Inactive Publication Date: 2017-08-04
南充市畅通科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the third-generation polycarboxylate superplasticizer is increasingly unable to meet the needs of pumping concrete for high-rise buildings. It has poor durability, high content of harmful substances, and cannot effectively prevent the loss of concrete slump.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: A kind of modified polycarboxylate water reducer, its specific mass components are as follows

[0016] Sodium Gluconate 35kg Hydroxypropyl Methyl Cellulose 4kg Sodium Citrate 3kg

[0017] Sodium lauryl sulfate 0.2kg Sodium hydroxide 2kg.

[0018] Its production method is as follows:

[0019] a. Wash the reactor several times with distilled water until it is clean, and dry the reactor;

[0020] b. After cooling (28°C), add the above five raw materials into the reactor;

[0021] c. Use the agitator provided in the reaction kettle to stir the above five powdery raw materials;

[0022] d. After sufficient stirring and polymerization, open the valve of the reaction kettle and the pipeline A to connect the alkali tank and drop in the polycarboxylate water reducer;

[0023] e. Open the valve of the reaction kettle and the pipeline B to connect the dropping tank, and drop in triisoolamine as the raw material of the early strength agent of the modified polycarb...

Embodiment 2

[0025] Embodiment 2: A kind of modified polycarboxylate water reducer, its specific mass components are as follows

[0026] Sodium gluconate 5kg Hydroxypropyl methylcellulose 0.5kg Sodium citrate 2kg

[0027] Sodium lauryl sulfate 0.1kg Sodium hydroxide 0.5kg.

[0028] Its production method is identical with embodiment 1.

Embodiment 3

[0029] Embodiment 3: a kind of modified polycarboxylate water reducer, its specific mass components are as follows

[0030] Sodium Gluconate 20kg Hydroxypropyl Methyl Cellulose 2.3kg Sodium Citrate 2.5kg

[0031] Sodium lauryl sulfate 0.15kg Sodium hydroxide 1.3kg.

[0032] Its production method is identical with embodiment 1.

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PUM

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Abstract

The invention discloses a modified polycarboxylate water reducer. The modified polycarboxylate water reducer is characterized by specifically containing the following components by mass: 5kg-35kg of sodium gluconate, 0.5kg-4kg of hydroxypropyl methyl cellulose, 2kg-3kg of sodium citrate, 0.1kg-0.2kg of lauryl sodium sulfate and 0.5kg-2kg of sodium hydroxide. A production method of the modified polycarboxylate water reducer specifically comprises the following steps: (a) washing a reaction kettle with distilled water for several times until the reaction kettle is clean, and drying the reaction kettle; (b) after the reaction kettle is cooled (to 28 DEG C), adding five raw materials into the reaction kettle; (c) stirring the five powdery raw materials in the reaction kettle by virtue of a stirrer arranged in the reaction kettle; (d) after adequately stirring and polymerizing, opening the reaction kettle and a valve of a pipeline A, connecting the reaction kettle with an alkali tank, and dropwise adding the polycarboxylate water reducer; (e) opening the reaction kettle and a valve of a pipeline B, connecting the reaction kettle with a dropwise adding tank, and dropwise adding triisohydramine as an early strength agent raw material of the modified polycarboxylate water reducer; and (f) after polymerization stirring reaction of the raw materials is complete, pumping the product to a packaging bucket, and sending the product out of a factory. After the modified polycarboxylate water reducer is cooled, the temperature is 28 DEG C.

Description

technical field [0001] The invention relates to a water reducer and a production method thereof, in particular to a modified polycarboxylate water reducer and a production method thereof. Background technique [0002] As we all know, polycarboxylate water reducer contains polyethylene glycol, (meth)acrylic acid, allyl alcohol polyoxyethylene ether and other substances. In terms of molecular structure, the molecular structure of polycarboxylate high performance water reducer is a linear comb. Shaped structure, rather than the single linear structure of traditional water reducers. There are many different active groups polymerized on the main chain of this type of water reducing agent, such as carboxylic acid group (-COOH), hydroxyl group (-OH), sulfonic acid group (-SO3Na) and so on. However, the third-generation polycarboxylate superplasticizers are increasingly unable to meet the needs of pumping concrete for high-rise buildings. They have poor durability, high content of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/30
CPCC04B24/161C04B2103/302
Inventor 龚政晏国耀冯文雅冯莉
Owner 南充市畅通科技服务有限公司