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Environment-friendly concrete early strength agent and preparation method thereof

A technology of environmentally friendly concrete and early strength agent, applied in the field of concrete additives, can solve the problems of unsatisfactory concrete strength, restrict the development of early strength agent, increase the preparation cost, etc., achieve low preparation cost, shorten the setting and hardening time, and make the preparation method simple and easy effects

Inactive Publication Date: 2021-02-12
陈小龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can achieve a certain early strength effect, it is still unsatisfactory in terms of concrete application, especially in terms of concrete strength.
In addition, its calcination temperature is relatively high at 1250-1400°C, which increases the production cost virtually and restricts the development of accelerators to a certain extent.

Method used

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  • Environment-friendly concrete early strength agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An environment-friendly concrete early strength agent is characterized in that it comprises the following components in parts by weight: 4 parts of phosphine-containing terminal hyperbranched polyether, 3 parts of urea / polyethylene glycol dicarboxylic acid condensation polymer, and 6 parts of pozzolan , 10 parts of dolomite, 4 parts of 1-butyl-3-methylimidazole nitrate, 2 parts of tris(hydroxymethyl)methylglycine, 25 parts of deionized water.

[0029] The particle size of the volcanic ash is 500 mesh; the particle size of the dolomite is 300 mesh.

[0030]The preparation method of the urea / polyethylene glycol dicarboxylic acid polycondensate comprises the following steps: dissolving urea in a high-boiling point solvent, and after completely dissolving, add polyethylene glycol dicarboxylic acid and a catalyst, at 40°C, Under a nitrogen atmosphere, the reaction was stirred for 8 hours, and the solvent and by-products were removed by rotary evaporation, and dried to a cons...

Embodiment 2

[0033] An environment-friendly concrete early strength agent is characterized in that it comprises the following components in parts by weight: 5 parts of phosphine-containing terminal hyperbranched polyether, 3.5 parts of urea / polyethylene glycol dicarboxylic acid condensation polymer, and 6.5 parts of pozzolan , 11 parts of dolomite, 4.5 parts of 1-butyl-3-methylimidazole nitrate, 2.5 parts of tris(hydroxymethyl)methylglycine, and 26 parts of deionized water.

[0034] The particle size of the volcanic ash is 600 mesh; the particle size of the dolomite is 350 mesh.

[0035] The preparation method of the urea / polyethylene glycol dicarboxylic acid polycondensate comprises the following steps: dissolving urea in a high-boiling point solvent, and after completely dissolving, add polyethylene glycol dicarboxylic acid and a catalyst, at 45°C, Under an inert gas atmosphere, the reaction was stirred for 9 hours, and the solvent and by-products were removed by rotary evaporation, and ...

Embodiment 3

[0038] An environment-friendly concrete early strength agent is characterized in that it comprises the following components in parts by weight: 6 parts of phosphine-containing terminal hyperbranched polyether, 4 parts of urea / polyethylene glycol dicarboxylic acid condensation polymer, and 7 parts of pozzolan , 13 parts of dolomite, 5 parts of 1-butyl-3-methylimidazole nitrate, 3 parts of tris(hydroxymethyl)methylglycine, 27 parts of deionized water.

[0039] The particle size of the volcanic ash is 650 mesh; the particle size of the dolomite is 400 mesh.

[0040] The preparation method of the urea / polyethylene glycol dicarboxylic acid polycondensate comprises the following steps: dissolving urea in a high-boiling point solvent, to be completely dissolved, then adding polyethylene glycol dicarboxylic acid and a catalyst, at 50°C, Under an inert gas atmosphere, the reaction was stirred for 10 hours, and then the solvent and by-products were removed by rotary evaporation, and dri...

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Abstract

The invention discloses an environment-friendly concrete early strength agent which is characterized by comprising the following components in parts by weight: 4-8 parts of hyperbranched polyether containing phosphine end groups, 3-5 parts of urea / polyethylene glycol dicarboxylic acid polycondensate, 6-8 parts of volcanic ash, 10-15 parts of dolomite, 4-6 parts of 1-butyl-3-methylimidazole nitrate, 2-4 parts of tris (hydroxymethyl) methylglycine and 25-30 parts of deionized water. The invention further discloses a preparation method of the environment-friendly concrete early strength agent. The environment-friendly concrete early strength agent disclosed by the invention has a remarkable early strength effect, can be used for rapidly improving the early strength of concrete, greatly shortening the setting and hardening time of cement concrete and improving the construction efficiency, and is safe to use, environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to an environment-friendly concrete early strength agent and a preparation method thereof. Background technique [0002] Concrete is currently the most used building material in the world, and its main advantages are low price, strong bearing capacity and high durability. With the continuous update of the application range of concrete, different requirements are put forward for the performance of concrete. Different application environments have different performance requirements for concrete. For example, large-volume concrete requires slowing down the cement hydration rate and delaying the appearance of the peak value of cement hydration heat. , to reduce the probability of cracks caused by temperature stress; and for some emergency repair projects, the concrete is required to set quickly and gain strength to meet the needs of engineering repairs. In the prior art, the...

Claims

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Application Information

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IPC IPC(8): C04B24/32C08G69/40C04B103/10
CPCC04B40/0039C08G69/40C04B2103/10C04B24/32C04B24/28C04B22/0006C04B22/10C04B24/127C04B24/123
Inventor 陈小龙
Owner 陈小龙