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Cement-based grouting material containing modified naphthalene-series water reducing agent and preparation method thereof

A naphthalene-based water reducing agent and grouting material technology, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of small slump loss over time, etc. Value, strength and bleeding rate improvement, the effect of increasing the water reduction rate

Inactive Publication Date: 2011-10-12
马清浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the existing naphthalene-based water reducers to have both high-efficiency water-reducing performance and good concrete reinforcement performance, while maintaining a small slump loss over time

Method used

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  • Cement-based grouting material containing modified naphthalene-series water reducing agent and preparation method thereof
  • Cement-based grouting material containing modified naphthalene-series water reducing agent and preparation method thereof
  • Cement-based grouting material containing modified naphthalene-series water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0027] Preparation of material A

[0028] Put 1600Kg of naphthalene into the melting kettle, melt and heat, and when the temperature rises to about 90°C, press the molten naphthalene into the sulfonation kettle, and keep the pressure less than or equal to 0.1MPa. After the naphthalene pressed into the sulfonation kettle is heated to 130-135°C, 1600Kg of concentrated sulfuric acid is added to carry out the sulfonation reaction, and the reaction is carried out for 3.5 hours. Then, 1000Kg of water is added to perform the hydrolysis reaction. When the acidity of the reaction system reaches about 28%, 1000Kg of formaldehyde is added to perform the condensation reaction, and the condensation reaction temperature is controlled at 100-110°C. After the condensation reaction was carried out for 3 hours, 1600 Kg of 50% sodium hydroxide aqueous solution was added for neutralization, so that the pH of the reaction system reached 8-10.

[0029] Preparation of B material

[0030] Add 3000kg of wa...

preparation Embodiment 2

[0033] Preparation of material A

[0034] The remaining steps are the same as in Preparation Example 1, except that 1400 Kg of concentrated sulfuric acid is used for the sulfonation reaction.

[0035] Preparation of B material

[0036] Add 3000kg of water and about 300Kg of sodium hydroxide into the reaction kettle, stir well, add 600Kg of phenol, then continue to stir evenly, add 1000Kg of sulfamic acid, stir for 40 minutes, add 300Kg of formaldehyde dropwise to the reaction system and react for about 1 hour , Add 450Kg of p-aminobenzenesulfonic acid, and then add 700Kg of formaldehyde dropwise to the reaction system, continue the reaction for half an hour to obtain a liquid product. There is no need to provide external heating during the reaction process, and only the heat generated by the reaction is collected and returned to the reaction kettle through the circulation pipeline. After measurement, the molecular weight of the obtained condensation product is about 6,200.

[0037] ...

preparation Embodiment 3

[0039] Preparation of material A

[0040] Same as Preparation Example 1.

[0041] Preparation of B material

[0042] Add 3000kg of water and about 300Kg of sodium hydroxide into the reaction kettle, stir well, add 600Kg of phenol, then continue to stir evenly, add 1050Kg of sulfamic acid, stir for 40 minutes, and add 350Kg of formaldehyde dropwise to the reaction system to react for about 1 hour , Add 350Kg of p-aminobenzenesulfonic acid, and then add 600Kg of formaldehyde dropwise to the reaction system, continue the reaction for half an hour to obtain a liquid product. There is no need to provide external heating during the reaction process, and only the heat generated by the reaction is collected and returned to the reaction kettle through the circulation pipeline. After measurement, the molecular weight of the obtained condensation product is about 6,100.

[0043] Mix material A and material B in a ratio of 10:1.

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Abstract

The invention provides a cement-based grouting material containing a modified naphthalene-series water reducing agent and a preparation method thereof. The cement-based grouting material comprises the following components in parts by weight: 350-500 parts of cement clinker, 80-130 parts of pulverized fuel ash, 20-30 parts of expanding agent, 80-120 parts of gypsum, 1-2 parts of pH value regulating agent, 8-15 parts of polyester type carboxylic acid water reducing agent and 300-500 parts of quartz sand, wherein the water reducing agent consists of a material A and a material B; the material A is prepared from naphthalene, concentrated sulfuric acid, formaldehyde, water and sodium hydrate; the material B is prepared from phenyl hydroxide, sodium hydroxide, formaldehyde, sulfamic acid and para-aminobenzene sulfonic acid; and the weight ratio of the material A to the material B is (20:1)-(5:1). The grouting material has high strength and low bleeding rate; and the strength character of the grouting material is hardly influenced by sub-zero weather.

Description

Technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a cement-based grouting material containing a modified naphthalene-based water reducing agent and a preparation method thereof. Background technique [0002] Because of the brittleness of concrete structures, cracking will often occur in engineering applications, and the cracking of concrete will cause the water tightness of the concrete structure to decrease, leakage, and then affect the service life of the project. Therefore, in the construction and use stage, many projects such as water conservancy, railways, highways, bridges, etc. inevitably require grouting materials to repair and strengthen cracks. The installation of many large instruments also requires the use of high-performance grouting materials to infuse the anchor bolts and the machine base or the combination of the steel structure and the foundation. [0003] There are many grouting materials common...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/22C04B103/30
CPCC04B24/226C04B28/02Y02W30/91C04B14/06C04B18/08C04B22/0093C04B22/143C04B22/008C04B2103/302
Inventor 马清浩
Owner 马清浩
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