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Super high-early-strength concrete early strength agent and preparation method thereof

A technology for concrete and early-strength agent, applied in the field of super-early-strength concrete early-strength agent and its preparation, can solve the problems of difficulty in getting rid of steam curing and autoclaving, large equipment investment, complicated operation process, etc. Die time, improve early strength, eliminate the effect of steam curing and autoclaving process

Active Publication Date: 2018-06-01
HENAN POLYTECHNIC UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, to achieve this strength index, it is necessary to adopt steam curing and pressure steaming process. This operation process increases equipment investment and energy consumption. At the same time, the working cycle is longer and the operation process is complicated.
In addition, at present, the prefabricated component industry uses more naphthalene-based water reducers. Even if polycarboxylate water reducers are used, ordinary polycarboxylate water reducers are usually compounded with inorganic salts with early strength properties to achieve early strength. effect, but it is still difficult to get rid of the process of steaming and pressure steaming

Method used

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  • Super high-early-strength concrete early strength agent and preparation method thereof

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preparation example Construction

[0034] In addition, the present invention also provides a kind of preparation method of above-mentioned concrete accelerator, and this preparation method comprises the following steps:

[0035] 1) Measure and weigh according to the proportioning design of each component raw material, and set aside;

[0036] 2) Put the water, diethylene glycol monobutyl ether, polyethylene glycol and isopropanol weighed in step 1) into the reaction kettle, mix and stir until completely dissolved;

[0037] 3) At normal temperature (20-30°C) and normal pressure, add the prepared liquid A and liquid B in equal parts by weight to step 2) at the same time during the mixing and stirring process, and the continuous dropping rate is 1.5-2.0kg / h (eg 1.55kg / h, 1.60kg / h, 1.65kg / h, 1.70kg / h, 1.75kg / h, 1.8kg / h, 1.85kg / h, 1.9kg / h, 1.95kg / h);

[0038] 4) After step 3) is added dropwise, add an alkaline regulator to the mixed solution and continue to stir for 0.2-1h (for example, 0.3h, 0.4h, 0.5h, 0.6h, 0.7h...

Embodiment 1

[0040] According to parts by weight, put 860 parts of water, 75 parts of diethylene glycol monobutyl ether, 45 parts of polyethylene glycol, and 20 parts of isopropanol into the reaction kettle, stir until completely dissolved; At the same time, add dropwise 930 parts of liquid A prepared by equal weight of calcium nitrate tetrahydrate and water at a ratio of 1:5 and 930 parts of liquid B prepared by sodium metasilicate nonahydrate and water at a ratio of 1:4, add dropwise for 4 hours, Add 5 parts of alkaline conditioner triethanolamine for neutralization and adjustment to obtain super early strength concrete early strength agent.

Embodiment 2

[0042] According to parts by weight, put 870 parts of water, 70 parts of diethylene glycol monobutyl ether, 45 parts of polyethylene glycol, and 15 parts of isopropanol into the reaction kettle, and stir until completely dissolved; At the same time, 925 parts of liquid A prepared with equal weight of calcium formate and water at a ratio of 1:6 and 925 parts of liquid B prepared with sodium metasilicate nonahydrate and water at a ratio of 1:3.5 were added dropwise, and added dropwise for 4.5 hours. Add 5.5 parts of alkaline regulator triethanolamine for neutralization to obtain super early strength concrete early strength agent.

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Abstract

The invention provides a super high-early-strength concrete early strength agent and a preparation method thereof. The concrete early strength agent comprises the following components by weight: 860-880 parts of water; 70-75 parts of diethylene glycol monobutyl ether; 40-45 parts of polyethylene glycol; 10-20 parts of isopropanol; 1850-1950 parts of a soluble inorganic salt solution; and 5-5.5 parts of an alkaline regulator. The soluble inorganic salt solution is composed of a solution A and a solution B in a ratio of 1:1, the solution A is a soluble calcium salt solution, and the solution B is a soluble silicate solution. Curing of concrete with the early strength agent provided by the invention under the conditions of normal temperature and pressure and a humidity of 95% can make the 8hcompressive strength of concrete reach 60% or more of the design strength, the demoulding time is shortened, the mould turnover velocity is speeded up, and the later strength does not decrease. The preparation method provided by the invention is easy to operate, and all the raw materials just need to be added in different order for stirring and uniform dispersion, the steam curing and autoclavingprocesses in the prior art are eliminated, and energy is saved and consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a super-early-strength concrete early-strength agent and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's housing industrialization, the demand for prefabricated components has gradually increased. Nowadays, most prefabricated components are produced by mold. In order to improve production efficiency and speed up the turnover of molds, it is necessary for concrete to have high strength in a short period of time. But at present, to achieve this strength index, it is necessary to adopt steam curing and pressure steaming process. This operation process increases equipment investment and energy consumption, and at the same time, the working cycle is longer and the operation process is complicated. In addition, at present, the prefabricated component industry uses more naphthalene-based water reducers....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/12
CPCC04B40/0039C04B2103/12C04B24/023C04B24/32C04B24/026C04B24/122C04B22/085C04B12/04C04B24/04
Inventor 王雨利田艳超郭晖史才军管学茂
Owner HENAN POLYTECHNIC UNIV
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