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Modified grinding-aiding early strength agent for steel slag as well as preparation method and application method of modified grinding-aiding early strength agent

An application method and early strength agent technology, applied in the field of steel slag modified grinding early strength agent and its preparation, can solve the problems of low molecular weight of early strength agent, poor grinding aid function, difficult steel slag utilization, etc.

Active Publication Date: 2021-06-08
安徽马钢嘉华新型建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low molecular weight of the early strength agent of this patent, the grinding aid function is poor; it has the early strength function and is mainly used for concrete preparation, and it is difficult to be used in the utilization of steel slag

Method used

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  • Modified grinding-aiding early strength agent for steel slag as well as preparation method and application method of modified grinding-aiding early strength agent
  • Modified grinding-aiding early strength agent for steel slag as well as preparation method and application method of modified grinding-aiding early strength agent
  • Modified grinding-aiding early strength agent for steel slag as well as preparation method and application method of modified grinding-aiding early strength agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A modified grinding aid early-strength agent with steel slag, the weight parts of raw materials included in it are:

[0052] 50 parts of triethanolamine;

[0053] 50 parts of acrylic acid;

[0054] 100 parts of water;

[0055] Preparation methods such as figure 1 The flow chart includes the following steps:

[0056] (1) Take the raw materials according to the proportion, put into the round bottom flask and mix evenly;

[0057] (2) Put the round bottom flask into a magnetic stirrer with a rotating speed of 500r / min and a temperature of 70°C, add a condensing reflux device, and react for 3.5h;

[0058] (3) Stop heating, continue stirring, and wait for the solution to cool down to room temperature to obtain a modified grinding aid early strength agent.

[0059] The modified grinding aid early-strength agent of the present embodiment is detected as figure 2 Shown, of which, 3628cm -1 O-H absorption peak at 3363cm -1 N-H absorption peak at 1734cm -1 The place is C=...

Embodiment 2

[0061] A modified grinding aid early strength agent with steel slag is characterized in that the parts by weight of the raw materials it includes are:

[0062] 45 parts of triisopropanolamine;

[0063] 55 parts of acrylic acid;

[0064] 90 parts of water;

[0065] Preparation methods such as figure 1 The flow chart includes the following steps:

[0066] (1) Take the raw materials according to the proportion, put into the round bottom flask and mix evenly;

[0067] (2) Put the round bottom flask into a magnetic stirrer with a rotating speed of 400r / min and a temperature of 60°C, add a condensing reflux device, and react for 3h;

[0068] (3) Stop heating, continue stirring, and wait for the solution to cool down to room temperature to obtain a modified grinding aid early strength agent.

[0069] In the modified grinding aid and early strength agent product obtained in this embodiment, liquid chromatography measures, among the organic matter, the ester compound accounts for ...

Embodiment 3

[0071] A modified grinding aid early strength agent with steel slag is characterized in that the weight parts of the raw materials it includes are:

[0072] 55 parts of diisopropanolamine;

[0073] 45 parts of acrylic acid;

[0074] 110 parts of water;

[0075] Preparation methods such as figure 1 The flow chart includes the following steps:

[0076] (1) Take the raw materials according to the proportion, put into the round bottom flask and mix evenly;

[0077] (2) Put the round bottom flask into a magnetic stirrer with a rotating speed of 600r / min and a temperature of 80°C, add a condensing reflux device, and react for 4h;

[0078] (3) Stop heating, continue stirring, and wait for the solution to cool down to room temperature to obtain a modified grinding aid early strength agent.

[0079] In the modified grinding aid early-strength agent product obtained in this embodiment, liquid chromatography measures, among organic matters, ester compound accounts for 74.6% by mass,...

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Abstract

The invention discloses a modified grinding-aiding early strength agent for steel slag as well as a preparation method and an application method of the modified grinding-aiding early strength agent, and relates to the field of steel slag grinding aiding. The modified grinding-aid early strength agent comprises (a) 60%-75% of ester compounds based on the total weight of the modified grinding-aid early strength agent; (b) 5%-15% of polyacrylic acid based on the total weight of the modified grinding-aid early strength agent; (c) 10%-35% of alcohol amine and acrylic acid monomers based on the total weight of the modified grinding-aid early strength agent, the preparation method comprises the following steps: adding water into alcohol amine and acrylic acid, uniformly mixing, heating while stirring, reacting at 60-80 DEG C for 3-4 hours, and cooling the solution to room temperature to obtain the modified grinding-aiding early strength agent which is applied to grinding of a gel material with high doping amount of steel slag, so the problems of low grinding efficiency of an existing grinding aid, low activity of the steel slag in the early stage, complex synthesis process, high cost and the like are solved. The preparation process is simple, the raw material cost is low, the finished product quality and performance are stable, the use effect is good, and the 7d strength increase is greater than or equal to 30%.

Description

technical field [0001] The invention relates to steel slag grinding aid, in particular to a modified grinding aid early strength agent for steel slag and its preparation method and application method. Background technique [0002] Steel slag is an inevitable by-product of the iron and steel industry, and its discharge accounts for about 15% to 20% of crude steel output. A large amount of steel slag has not been effectively utilized, causing harm to the environment and occupying a large amount of land. [0003] Steel slag is a potentially active cementitious material. Its chemical composition is similar to that of cement clinker, but it contains a large amount of unstable free CaO, FeO and MgO. Its main mineral composition is C 2 S (dicalcium silicate), C 3 S (tricalcium silicate), RO phase, rhodoxene, and a small amount of glass phase, calcium olivine, C 3 A (tricalcium aluminate), f-CaO and varying amounts of steel shot. In order to absorb a large amount of steel slag a...

Claims

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Application Information

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IPC IPC(8): C04B5/00
CPCC04B5/00
Inventor 雷国元王宗森魏中华郭卫东
Owner 安徽马钢嘉华新型建材有限公司
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