Multifunctional enhancement-type concrete admixture and preparation method thereof

A concrete admixture and reinforced technology, applied in early strength and nano synergistic polycarboxylate admixtures and their preparation, in the field of high water reduction, to achieve the effects of good adaptability, improvement of retention capacity and prevention of coalescence

Inactive Publication Date: 2014-10-08
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing technical problems of concrete strength, and to provide a multifunctional reinforced concrete admixture with high water-reducing properties and good early and late strength. Another purpose of the present invention is to provide the above-mentioned admixture preparation method

Method used

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  • Multifunctional enhancement-type concrete admixture and preparation method thereof
  • Multifunctional enhancement-type concrete admixture and preparation method thereof
  • Multifunctional enhancement-type concrete admixture and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] Prepare the early strength synergistic polycarboxylic acid admixture of the present invention according to the following steps:

[0026] A. Polymerized early-strength polycarboxylate superplasticizer PCs

[0027] a. The base material weighs 80 parts by weight of HPEG with a number average molecular weight of 2400 and 50 parts by weight of water, stirs evenly, and adds 0.8 parts by weight of hydrogen peroxide;

[0028] b. Weigh 10 parts by weight of acrylic acid, 2 parts by weight of AMPS, add 25 parts by weight of water and shake well, which is dripping material 1;

[0029] c. Weigh 0.9 parts by weight of mercaptopropionic acid and 0.18 parts by weight of L-ascorbic acid, add 40 parts by weight of water and shake well, which is dripping material 2;

[0030] d. Stir the bottom material at a reaction temperature of 40°C, and start dropping at the same time, complete the dropping of material 1 in 3 hours, and complete the dropping of material 2 in 3.5 hours, keep warm for...

Embodiment 2～ Embodiment 5

[0034] By following the method steps in Example 1 and the formulation in Table 1, the high water-reducing, early-strength and synergistic polycarboxylic acid-based admixture of the present invention was prepared.

[0035] Table 1. Experimental raw materials and technical indicators of each embodiment

[0036]

[0037]

[0038] From the above data, it can be seen that the early-strength synergistic high-water-reducing polycarboxylic acid admixture GO-PCs of the present invention has the characteristics of high water-reducing and effective early-stage and late-stage strength improvement.

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Abstract

The invention relates to a multifunctional enhancement-type concrete admixture and a preparation method thereof. The concrete admixture is composed of an early-strength polycarboxylic acid water reducing agent (PCs) and nano graphene oxide (GO). The mass ratio of the solid to the GO in the early-strength water reducing agent (PCs) is (10-30):1. The early-strength polycarboxylic acid water reducing agent (PCs) is composed of the following components in parts by weight: 80 parts of unsaturated polyether, 8-12 parts of acrylic acid, 1.5-4 parts of monomer with functional groups, 0.5-1.8 parts of chain-transfer agent, 0.6-2 parts of initiator, 0.12-0.3 part of reducer, 8.4-13.2 parts of neutralizing alkali liquor and 150-200 parts of water. The admixture has an obvious enhancement action on concrete, implements high-strength long-service-life green concrete, and has important meanings in the field of application of high-strength high-performance concrete.

Description

technical field [0001] The present invention relates to a multifunctional enhanced concrete admixture and its preparation method, in particular to a high water-reducing, early-strength and nano-synergistic polycarboxylic acid-based admixture and its preparation method. Water rate and technical fields of building materials that increase early and late strength requirements. Background technique [0002] At present, the ordinary polycarboxylate superplasticizer produced in China has reached the level of water reducing rate in developed countries, but the research on early strength and enhanced polycarboxylate superplasticizer still has a big gap from the international level. It limits the application of polycarboxylate superplasticizer in fields such as common prefabricated concrete and high-strength tubular pile concrete. Due to the requirements of environmental protection, polycarboxylates are gradually replacing naphthalene-based water reducers, but the slow-release perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/06C08F220/58
Inventor 江芸李伟王毅丁蓓郑春扬
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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