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Composite early strength agent and preparation method thereof

A technology of compounding early strength agent and early strength agent is applied in the field of building materials, which can solve the problems of poor effect, single composition of early strength agent, harmfulness to the environment and human body, etc. Effect

Inactive Publication Date: 2020-01-24
盛秀群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the early strength agents mature in the market have single ingredients, the effect is not good, and some contain organic substances, which are harmful to the environment and human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A composite early strength agent, in parts by weight, the early strength agent comprises the following components: 3 parts of sodium sulfate, 1 part of iron sulfate, 5 parts of calcium formate, 5 parts of active nano silicon dioxide, 5 parts of alcohol amine , 1 part of isooctyl phosphate, 1.5 parts of water reducer.

[0025] The alcohol amine is diethanolamine.

[0026] The water reducer is a polycarboxylate water reducer.

[0027] The active nano silicon dioxide is prepared by the following method:

[0028] (1) Weigh 5g nano-SiO 2 In a 250mL three-neck flask, add 100mL of toluene, shake and disperse under ultrasonic waves for 5min, then raise the temperature to 80°C, stir magnetically at a constant temperature for 15min; add 10mL of dodecyltrimethylsilane, and react at a constant temperature of 80°C for 1h;

[0029] (2) Filtrate the mixture obtained in step (1) with a vacuum pump to remove toluene to obtain the primary product; then disperse it in 200mL of ethanol ...

Embodiment 2

[0036] A composite early strength agent, in parts by weight, said early strength agent comprises the following components: 4 parts of sodium sulfate, 3 parts of iron sulfate, 8 parts of calcium formate, 8 parts of active nano silicon dioxide, 8 parts of alcohol amine , 2 parts of isooctyl phosphate, 2 parts of water reducing agent.

[0037] The alcohol amine is triisopropanolamine.

[0038] The water reducer is a polycarboxylate water reducer.

[0039] The active nano silicon dioxide is prepared by the following method:

[0040] (1) Weigh 5g nano-SiO 2 In a 250mL three-neck flask, add 100mL of toluene, shake and disperse under ultrasonic waves for 5min, then raise the temperature to 80°C, stir magnetically at a constant temperature for 15min; add 10mL of dodecyltrimethylsilane, and react at a constant temperature of 80°C for 1h;

[0041] (2) Filtrate the mixture obtained in step (1) with a vacuum pump to remove toluene to obtain the primary product; then disperse it in 200mL ...

Embodiment 3

[0048] A composite early strength agent, in parts by weight, the early strength agent comprises the following components: 5 parts of sodium sulfate, 5 parts of iron sulfate, 10 parts of calcium formate, 10 parts of active nano silicon dioxide, 10 parts of alcohol amine , 3 parts of isooctyl phosphate, 2.5 parts of water reducer.

[0049] The alcohol amine is diethanolamine.

[0050] The water reducer is a polycarboxylate water reducer.

[0051] The active nano silicon dioxide is prepared by the following method:

[0052] (1) Weigh 5g nano-SiO 2 In a 250mL three-neck flask, add 100mL of toluene, shake and disperse under ultrasonic waves for 5min, then raise the temperature to 80°C, stir magnetically at a constant temperature for 15min; add 10mL of dodecyltrimethylsilane, and react at a constant temperature of 80°C for 1h;

[0053] (2) Filtrate the mixture obtained in step (1) with a vacuum pump to remove toluene to obtain the primary product; then disperse it in 200mL of eth...

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PUM

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Abstract

The invention discloses a composite early strength agent and a preparation method thereof, and belongs to the technical field of building materials. The early strength agent comprises 3-5 parts of sodium sulfate, 1-5 parts of ferric sulfate, 5-10 parts of calcium formate, 5-10 parts of active nan-silica, 5-10 parts of alkylol amine, 1-3 parts of isooctanol phosphate and 1.5-2.5 parts of a water reducing agent. The composite early strength agent has the advantages of scientific formula, simple preparation method, effectiveness in shortening of the hydration setting time of cement, enhancement of the compression strength and flexural strength, and excellent market application potential.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a composite early strength agent and a preparation method thereof. Background technique [0002] Concrete early strength agent is one of the main varieties of concrete admixtures. So far, the early-strength admixtures developed at home and abroad mainly include: inorganic salt early-strength agents such as chloride salts, sulfates, nitrites, and silicates; organic early-strength agents such as triethanolamine, calcium formate, and urea; A variety of compound early-strength admixtures, such as early-strength water reducer, early-strength antifreeze and early-strength pumping agent. [0003] During the construction process of concrete, it takes a long time from the condensation and hardening caused by hydration to the expected strength. The addition of early strength agent can significantly improve the early strength of concrete, thereby shortening the curin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C04B103/12
CPCC04B40/0039C04B2103/12C04B22/147C04B22/149C04B24/04C04B14/06C04B24/122C04B24/08C04B2103/302
Inventor 盛秀群
Owner 盛秀群
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