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An early-strength water-reducing agent, its production process and its application

A water-reducing agent and early-strength technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of increasing the probability of calcium ions reacting with sulfate to produce calcium sulfate, and concrete resisting sulfate erosion Reduce performance, aggravate concrete erosion and other problems, achieve the effect of increasing compressive performance and anti-corrosion performance, reducing concrete cracks, and improving anti-corrosion performance

Active Publication Date: 2021-06-18
北京金隅节能科技有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: adding calcium chloride to the above-mentioned water reducer, the calcium chloride in the concrete will aggravate the reaction between the alkali and the aggregate, and aggravate the erosion of the concrete. In addition, the addition of calcium chloride Increase the calcium ions in the concrete, increase the probability of calcium ions reacting with sulfate to produce calcium sulfate, which will lead to concrete cracking and reduce the performance of concrete against sulfate erosion

Method used

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  • An early-strength water-reducing agent, its production process and its application
  • An early-strength water-reducing agent, its production process and its application

Examples

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Effect test

Embodiment 1

[0044] An early-strength water reducer prepared by the following method, 100g polycarboxylate water reducer, 30g calcium chloride, 25g corn stalk powder, 5g silica fume, 18g fly ash, 5g nano silicon dioxide, 25g silicon Add algae earth, 10g of paraffin particles and 60g of water into the mixer and stir evenly to obtain an early-strength water reducer;

[0045] Among them, the polycarboxylate superplasticizer adopts acrylic polycarboxylate superplasticizer with a solid content of 35%;

[0046] The particle size range of nano-silica is 25-35nm;

[0047] The fineness of diatomite is 300-500 mesh.

Embodiment 2

[0049] An early-strength water reducer prepared by the following method, 85g polycarboxylate water reducer, 45g calcium chloride, 15g corn stalk powder, 7g silica fume, 15g fly ash, 7g nano silicon dioxide, 18g silicon Add algae earth, 14g of paraffin particles and 45g of water into the mixer and stir evenly to obtain an early-strength water reducer;

[0050] Among them, the polycarboxylate superplasticizer adopts acrylic polycarboxylate superplasticizer with a solid content of 38%;

[0051] The particle size range of nano-silica is 25-35nm;

[0052] The fineness of diatomite is 300-500 mesh.

Embodiment 3

[0054] An early-strength water reducer prepared by the following method, 90g polycarboxylate water reducer, 40g calcium chloride, 17.5g corn stalk powder, 6.5g silica fume, 16g fly ash, 6g nano silicon dioxide, Add 20g of diatomaceous earth, 13g of paraffin particles and 50g of water into the mixer and stir evenly to obtain an early-strength water reducer;

[0055] Among them, the polycarboxylate superplasticizer adopts acrylic polycarboxylate superplasticizer with a solid content of 40%;

[0056] The particle size range of nano-silica is 25-35nm;

[0057] The fineness of diatomite is 300-500 mesh.

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Abstract

The invention relates to an early-strength water-reducer, a production process and its application, belonging to the technical field of concrete admixtures, comprising the following components in parts by weight: 80-100 parts of polycarboxylate water-reducer, 30 parts of calcium chloride ‑50 parts, 10‑25 parts of corn straw powder, 5‑8 parts of silica fume, 12‑18 parts of fly ash, 5‑8 parts of nano silicon dioxide, 15‑25 parts of diatomaceous earth, 10‑15 parts of paraffin wax particles , 40-60 parts of water; the preparation method comprises the following steps of uniformly mixing the above raw materials to obtain a water reducer. The invention has the effects of reducing alkali aggregate reaction and improving the sulfate corrosion resistance of concrete.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an early-strength water reducer, a production process and its application. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them belong to anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, polycarboxylic acid series, etc. After adding water reducing agent, they can disperse cement particles, improve their workability and reduce unit water consumption , improve the fluidity of the concrete mixture or reduce the amount of cement per unit and save cement. [0003] In recent years, with the rapid development of my country's economy, in many projects, in order to speed up the progress of the project and shorten the construction period, it is necessary to use early-strength water reducers to speed up the cement hydration speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/36C04B20/04C04B20/02C04B14/08C04B22/12C04B18/24C04B18/08C04B22/06
CPCC04B20/023C04B20/04C04B40/0039C04B2103/12C04B2103/302C04B2103/60C04B2103/603C04B22/124C04B18/24C04B18/146C04B18/08C04B22/06C04B14/08C04B24/36Y02W30/91
Inventor 王倩罗紫隆张业明张露瑶付海平张三丰徐云栋路海峰马军民
Owner 北京金隅节能科技有限公司