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Recycled aggregate chemical treatment reagent and preparation method thereof

A technology for chemical treatment and recycling of aggregates, applied in the field of recycled concrete aggregates, can solve problems such as high energy consumption, adverse effects of aggregate modification, and easy agglomeration, and achieves enhanced bonding ability, optimization of the internal structure of aggregates, The effect of avoiding agglomeration

Inactive Publication Date: 2020-11-20
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Studies have shown that nano-SiO 2 This effect can be achieved, but it is prone to agglomeration when it is dissolved in water. It needs to be dispersed by an ultrasonic disperser, which consumes a lot of energy, and as time goes by, agglomeration will still occur, which will cause serious damage to aggregate modification. Certain adverse effects, and orthoethyl silicate (TEOS) as the preparation of nano-SiO 2 Raw materials can avoid agglomeration

Method used

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  • Recycled aggregate chemical treatment reagent and preparation method thereof

Examples

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Embodiment 1

[0024] A chemical treatment reagent for recycled aggregate, which is composed of the following components according to the molar ratio: ethyl orthosilicate: ethanol: acidic solution = 1:1:6. Wherein, the pH value of the acidic solution is 2.

[0025] A preparation method of recycled aggregate chemical treatment reagent, comprising the steps of:

[0026] Step 1. At a certain temperature, drop hydrochloric acid into distilled water, stir evenly, and prepare an acidic solution for use;

[0027] Step 2. The molar ratio of tetraethyl orthosilicate, ethanol, and acidic solution is 1:1:6. Calculate the mass of the three solutions according to the molar ratio, weigh them, and pour them into three beakers;

[0028] Step 3, introducing the proportioned ethyl orthosilicate into ethanol, stirring evenly to obtain a mixed solution.

[0029] Step 4. Slowly pour the prepared acidic solution into the mixed solution obtained in Step 3 under heating in a water bath, and at the same time stir ...

Embodiment 2

[0034] Example 2: A chemical treatment reagent for recycled aggregates, which consists of the following components according to the molar ratio: ethyl orthosilicate: ethanol: acidic solution = 1:1:9. Wherein, the pH value of the acidic solution is 2. The remaining steps are the same as above.

Embodiment 3

[0035] Example 3: A chemical treatment reagent for recycled aggregates, which consists of the following components according to the molar ratio: ethyl orthosilicate: ethanol: acidic solution = 1:1:12. Wherein, the pH value of the acidic solution is 2. The remaining steps are the same as above.

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Abstract

The invention discloses a recycled aggregate chemical treatment reagent and a preparation method thereof. The recycled aggregate chemical treatment reagent consists of the following components: tetraethyl orthosilicate, ethanol and an acidic solution in a molar ratio of 1:(1-1.3):(6-12). The invention discloses a preparation method of a recycled aggregate chemical treatment reagent, wherein the method comprises the following steps: stirring and mixing tetraethyl orthosilicate, ethanol, hydrochloric acid and distilled water used as raw materials, and heating in a water bath to obtain the recycled aggregate chemical treatment reagent. The recycled aggregate chemical treatment reagent provided by the invention can effectively reduce the water absorption rate, crushing value and mortar adhesion rate of recycled aggregate, increase the apparent relative density of the recycled aggregate and improve the quality of the recycled aggregate.

Description

technical field [0001] The invention belongs to the field of recycled concrete aggregates, in particular to a chemical treatment reagent for recycled aggregates and a preparation method thereof. Background technique [0002] In recent years, there are more and more construction wastes in our country, and most of them have not been rationally utilized, and their recycling rate is far lower than that of developed countries. At the same time, with the continuous advancement of urbanization, the demand for sand and gravel resources is increasing. The recycled aggregate formed from waste concrete processing in construction waste can be reused, reducing the consumption and mining of natural sand and gravel. Compared with natural aggregate, a layer of cement mortar is attached to the surface of recycled aggregate, and in the process of processing recycled aggregate, aggregates will produce micro-cracks due to the accumulation of damage, resulting in an increase in water absorption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C01B33/18B82Y40/00C04B18/16
CPCC04B20/1066C01B33/18B82Y40/00C04B18/16Y02W30/91
Inventor 寇长江王芸芸胡皓天张维嘉陈子恺
Owner YANGZHOU UNIV