CN-121990773-A - Pozzolanic material, method for producing the same and products thereof

Abstract

The invention provides a method for preparing a pozzolanic material, which comprises the steps of collecting waste glass, crushing the waste glass to waste glass particles with a preset size, and grinding the waste glass particles to obtain fine grinding glass micro powder with a preset particle size and a preset particle size distribution to be used as the pozzolanic material. The invention also provides pozzolanic materials prepared by the method, and articles made using the pozzolanic materials.

Inventors

• QIU YUWEN
• Lin chongwen
• WU MINGFU
• ZHANG ZHENGXIN
• Shi Naiquan
• XU WEIDONG
• CHEN YITING
• LI SONGMING

Assignees

• 台湾水泥股份有限公司

Dates

Publication Date

20260508

Application Date

20251017

Priority Date

20241101

Claims (17)

1. 1. A method of making a pozzolanic material, comprising: Collecting waste glass; breaking the waste glass into waste glass particles of a predetermined size, and Grinding the waste glass particles to obtain fine grinding glass micro powder with preset particle size and preset particle size distribution to be used as a pozzolanic material.
2. 2. The method of claim 1, wherein the predetermined size of the waste glass particles is less than about 10 mm.
3. 3. The method of claim 1, wherein the predetermined particle size of the fine ground glass particulate is less than about 45 μm.
4. 4. The method of claim 1, wherein the predetermined particle size distribution of the fine ground glass particulate is less than about 5% on screen.
5. 5. The method of claim 1, wherein the fine ground glass micropowder is further treated with a chemical adjuvant.
6. 6. The method of claim 5, wherein the chemical adjuvant comprises diethylene glycol, triethanolamine, triisopropanolamine, or any combination thereof.
7. 7. The method of claim 1, wherein the fine ground glass powder has a predetermined specific surface area.
8. 8. The method of claim 7, wherein the predetermined specific surface area is from about 2500 cm 2 /g to about 8000 cm 2 /g.
9. 9. The method of claim 1, wherein the waste glass is from a glass container, a flat glass, a solar photovoltaic glass, a TFT-LCD liquid crystal substrate glass, or any combination thereof.
10. 10. The method of claim 1, further comprising screening according to the type and/or color of waste glass prior to the breaking step and/or prior to the grinding step.
11. 11. A pozzolanic material prepared by the method of any one of claims 1 to 10.
12. 12. The pozzolanic material of claim 11, further comprising fly ash, calcined clay, or a combination thereof.
13. 13. An article comprising a body having a predetermined shape, and the pozzolanic material of any one of claims 11-12.
14. 14. The article of claim 13, wherein the predetermined shape comprises a round, square, conical, arched, spherical, columnar, or any shape designed as desired.
15. 15. The article of claim 13 comprising a building, ornament, container, or mold.
16. 16. The article of claim 13, further comprising cement.
17. 17. The article of claim 13, further comprising concrete or cement mortar.

Description

Pozzolanic material, method for producing the same and products thereof Technical Field The present invention relates to a pozzolanic material, a method for producing the same, and a product thereof, and more particularly, to a pozzolanic material comprising activated waste glass, a method for producing the same, and a product thereof. Background Modern buildings are mainly reinforced concrete building materials, which are high in energy consumption and considerable in carbon emission, wherein the maximum amount of concrete is about forty tons of cement produced annually worldwide, and one ton of cement clinker is produced to generate carbon dioxide emission of 0.9 to 1.0 ton. Therefore, in order to reduce the carbon emissions to achieve the Net Zero emission goal, it is necessary to consider reducing the concrete usage or improving the cement usage in the concrete formulation, but how to effectively reduce the cement usage while maintaining the quality of safety, workability and durability is an important issue in the current construction industry. In the prior art, it has been found that pozzolanic materials (Pozzolanic materials), fly ash and other powder materials containing pozzolanic properties can be used to replace a part of cement clinker, thereby achieving the purpose of reducing the cement dosage in concrete. Pozzolanic refers to the property of a material that alone does not have hydraulic properties, but when mixed with lime and water at ordinary temperature, produces a hydrated product that has hydraulic properties. Pozzolanic materials refer to mineral powder materials with pozzolanic properties, and can be divided into two types, natural and artificial, mixed materials (for details, refer to GB/T2847-2022). Fly ash is a powder collected in the flue gas of a pulverized coal furnace of a power plant and has a pozzolanic property similar to that of a pozzolanic material (for details reference GB/T1596-2017). Since glass is biologically non-decomposable, it cannot be decomposed by burying and composting methods, and has a non-flammable property, its resources are reused as the best treatment method at present. The waste glass mainly comes from glass containers, flat glass and TFT-LCD liquid crystal substrate glass. In addition, as the demand for solar photovoltaic increases, the amount of waste glass processed by solar photovoltaic panels will also increase in the future. At present, the waste glass can be used as engineering granules after being subjected to screening, crushing, impurity removal and other treatments, and is mostly applied to recycled products such as asphalt pavement, brick products, cement products and the like. However, most of these applications fall into the field of material recycling degradation and fail to fully exploit the pozzolanic properties of the highly amorphous siliceous component of waste glass. The prior related art such as patent CN103553491a and CN103172323a only discloses the method of applying waste glass to concrete preparation, but the problem of waste glass activity is not explored at all. In addition, the TWI761284 and TWI796036 patents propose an inorganic cementing material or inorganic curing material formed by the reaction and activation of glass frit and alkali activator, but the use of alkali activator will increase the production cost, and the commercial application thereof is yet to be verified, and the market acceptance is low. Therefore, in order to solve the problems of insufficient activity, low reuse rate, insufficient concrete performance and the like of the waste glass when the waste glass is used as the pozzolanic material in the prior art, development of a method for improving the cementing activity of the waste glass to improve the reuse rate and create high added value is needed, and is an important target for the development of the current technology. Disclosure of Invention For the above reasons, the present invention provides a method for preparing a pozzolanic material from waste glass, and in particular, a technique for activating and reproducing waste glass into a pozzolanic material. In one embodiment of the present invention, a method of preparing a pozzolanic material includes the steps of collecting waste glass, crushing the waste glass to waste glass particles of a predetermined size, and grinding the waste glass particles to obtain finely ground glass micro-powder of a predetermined particle size and a predetermined particle size distribution as the pozzolanic material. Preferably, the predetermined size of the waste glass particles may be less than about 10 mm a. Preferably, the predetermined particle size of the fine ground glass micro powder may be less than about 45 μm. Preferably, the predetermined particle size distribution of the fine ground glass particulate may be a screen size of less than about 5%. Preferably, the fine ground glass micropowder is further treated with a chemical auxiliary. Preferably, the chemica