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Ultra-dense concrete polycarboxylate water reducer for nuclear power and preparation method thereof

A water-reducing agent and super-dense technology, applied in the field of ultra-dense concrete polycarboxylate water-reducer for nuclear power and its preparation, can solve the adverse effects of concrete mechanical properties and durability, complex components, polycarboxylate water-reducer Problems such as adsorption-dispersibility and dispersion retention, to achieve the effect of improving self-compacting, improving fluidity, reducing equipment investment costs and energy consumption costs

Inactive Publication Date: 2017-12-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The various components contained in the technical solution published by the above-mentioned patents are complex, and various substances will not only affect the adsorption-dispersibility and dispersion retention of polycarboxylate superplasticizers, but also affect the mechanical properties and durability of concrete. and so on cause adverse effects, so further improvement is required

Method used

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  • Ultra-dense concrete polycarboxylate water reducer for nuclear power and preparation method thereof

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Embodiment 1

[0040] A polycarboxylate superplasticizer for nuclear power ultra-dense concrete, comprising the following components and parts by weight per 100 parts:

[0041]Dispersed ether polycarboxylate superplasticizer: 50 parts

[0042] Slump-preserving ether polycarboxylate superplasticizer: 20 parts

[0043] Sodium gluconate: 5 parts

[0044] Polyether modified silicone defoamer: 0.05 parts

[0045] Hydroxypropyl methylcellulose: 2 parts

[0046] Triethanolamine: 1 part

[0047] Sodium nitrite: 0.3 parts

[0048] water: balance

[0049] Among them, the dispersed ether polycarboxylate water reducer is prepared by the following method:

[0050] Add 180 g of TPEG macromonomer and 180 g of water into the reactor equipped with a stirring device at normal temperature, turn on the stirring device, and stir until the TPEG macromonomer is completely dissolved. Add 2.5 g of ammonium persulfate, 1 g of hydrogen peroxide (purity: 35%), and 3.3 g of acrylic acid to the reaction system, an...

Embodiment 2

[0054] A polycarboxylate superplasticizer for nuclear power ultra-dense concrete, comprising the following components and parts by weight per 100 parts:

[0055] Dispersed ether polycarboxylate water reducer: 52 parts

[0056] Slump-preserving ether polycarboxylate superplasticizer: 25 parts

[0057] Sodium gluconate: 3 parts

[0058] Polyether defoamer: 0.01 parts

[0059] Sodium tripolyphosphate: 3 parts

[0060] Triisopropanolamine: 1.5 parts

[0061] Sodium nitrite: 0.2 parts

[0062] water: balance

[0063] Among them, the dispersed ether polycarboxylate water reducer is prepared by the following method:

[0064] Add 180 g of TPEG macromonomer and 230 g of water into the reactor equipped with a stirring device at normal temperature, turn on the stirring device, and stir until the TPEG macromonomer is completely dissolved. Add 4 g of hydrogen peroxide (purity: 35%) and 2.3 g of maleic anhydride to the reaction system, and continue to fully stir the reaction system. ...

Embodiment 3

[0068] A polycarboxylate superplasticizer for nuclear power ultra-dense concrete, comprising the following components and parts by weight per 100 parts:

[0069] Dispersed ether polycarboxylate superplasticizer: 55 parts

[0070] Slump-preserving ether polycarboxylate superplasticizer: 20 parts

[0071] Cane sugar: 5 parts

[0072] Polyether defoamer: 0.05 parts

[0073] Hydroxypropyl methylcellulose: 1 part

[0074] Triisopropanolamine: 1 part

[0075] Methylparaben: 0.2 parts

[0076] water: balance

[0077] Among them, the dispersed ether polycarboxylate water reducer is prepared by the following method:

[0078] Add 180 g of TPEG macromonomer and 200 g of water into the reactor equipped with a stirring device at normal temperature, turn on the stirring device, and stir until the TPEG macromonomer is completely dissolved. Add 2 g of potassium persulfate, 1 g of hydrogen peroxide (purity: 35%), and 2.5 g of maleic anhydride to the reaction system, and continue to full...

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Abstract

The invention relates to an ultra-dense concrete polycarboxylate water reducer for nuclear power and a preparation method thereof. The water reducer includes the following components and parts by weight per 100 parts: 50-55 parts of dispersed ether polycarboxylate water reducer, Slump-preserving ether polycarboxylate superplasticizer 20-25 parts, retarder 3-5 parts, defoamer 0.01-0.05 parts, water-retaining agent 1-3 parts, shrinkage reducing agent 1-2 parts, preservative 0.1- 0.3 parts, water is the balance; during preparation, the components can be mixed uniformly by weight. Compared with the prior art, the water reducing agent of the present invention has the functions of improving the workability of concrete, increasing the fluidity, reducing the peak temperature of concrete, reducing the shrinkage value of concrete, reducing the internal porosity of concrete, improving the self-compacting property of concrete, improving the durability of concrete, etc. The invention has the advantages of simple preparation method, wide source of raw materials, low cost, environmental protection and good application prospect.

Description

technical field [0001] The invention belongs to the technical field of water reducers, and relates to a water reducer and a preparation method thereof, in particular to an ultra-dense concrete polycarboxylate water reducer for nuclear power and a preparation method thereof. Background technique [0002] The base plate of the AP1000 nuclear island raft is a reinforced concrete raft base integrated with the base plate of the reactor and the base plate of the auxiliary powerhouse. 27.7m. Concreting of the entire floor will be done in one go. It is a typical variable cross-section mass concrete structure. The performance requirements of the admixture used are extremely high, for example: the concrete has good workability, the slump loss within one hour is within 40mm, and the air content loss is within 2%. [0003] Due to its unique molecular structure characteristics, polycarboxylate superplasticizer can produce steric repulsion in cement paste, and has stronger dispersibili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/06C08F222/06C08F220/14
Inventor 张雄何燕顾明东洪万领
Owner TONGJI UNIV
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