TW201808855A - Method of manufacturing binder material, cured mortar and cured mortar forming by thereof - Google Patents

Abstract

Method of manufacturing binder material, cured mortar and cured mortar forming by thereof are provided. Steps of the method of manufacturing binders are stated as follows. Steelworks slags are provided. The steelworks slags are immersed in water to form an alkaline solution. The steelworks slags are separated from the alkaline solution. Glass powder is added in the alkaline solution to form a binder solution. The binder solution is cured to form a binder material.

Description

Method for manufacturing cementitious material, mortar cured product, and mortar cured product formed thereby

The present invention relates to a concrete material and a method for manufacturing the same, and particularly relates to a method for manufacturing a cemented material and a cured mortar and a cured mortar formed therefrom.

Steel-making slag is a by-product produced during steelmaking. It is formed by smelting steel-making raw materials in a blast furnace. The resulting impurities are separated from the metal by oxidation or slag formed after combustion or combustion. However, if it is not correct The recycling and reuse of steel-making slag will not only cause the steel-making industry to pay extra for the cost of processing the steel-making slag, but also cause a burden on the environment.

In the early days, the steelmaking slag was treated by burying, however, it would make the environment polluted by heavy metals in the steelmaking slag. With the development of industrial technology, steelmaking slag can be added to the civil materials of various buildings after stabilizing treatment. However, after the steelmaking slag absorbs water or contacts carbon dioxide in the air, It will expand and thus reduce the structural strength of the building, which limits the scope of steelmaking slag recovery and reuse. Therefore, there is an urgent need to provide a method for treating steel-making slag in order to completely solve the defects in the treatment of steel-making slag in the conventional technology, so as to enhance its industrial utilization.

The invention provides a method for manufacturing a cement material, which includes the following steps: providing steel-making slag; soaking the steel-making slag in water to form an alkaline solution in the water; separating the alkaline solution from the steel-making slag; in the alkaline solution Glass powder is added to form a cementing solution; and the cementing solution is cured to form a cementitious material.

The invention provides a method for manufacturing a solidified mortar, which includes the following steps: providing steel-making slag; soaking the steel-making slag in water to form an alkaline solution in the water; adding glass powder to the alkaline solution containing the steel-making slag And stirring to form a mortar; and curing mortar to form a mortar cured product.

The present invention provides another method for manufacturing solidified mortar, which includes the following steps: providing steel-making slag; soaking the steel-making slag in water to form an alkaline solution in the water; separating the alkaline solution from the steel-making slag; Glass powder and fine particles are added to the sexual solution and stirred to form a mortar; and cured mortar to form a cured mortar.

The invention provides a solidified mortar, which includes 10-50 wt% of steel-making slag and 50-90 wt% of the above-mentioned cementitious material.

Based on the above, the manufacturing method of the cemented material and the mortar cured product of the present invention uses steelmaking slag and waste glass as one of the raw materials for forming the cementitious material. In addition to recycling the steelmaking slag and waste glass, it can also be processed The cost of steel slag and waste glass and the cost of raw materials to form cement and mortar solidification are reduced. In addition, by soaking the steel-making slag in water to form an alkaline solution, the hydroxide ions in the alkaline solution react with the glass powder, so there is no need to purchase additional alkali metal or alkaline earth metal hydroxide The raw materials and sodium silicate come from the preparation of alkaline solution, which reduces the cost of raw materials for forming cement and mortar cured products.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below and described in detail in conjunction with the accompanying drawings.

FIG. 1 is a flowchart of steps of a method for manufacturing a cement material according to an embodiment of the invention.

Referring to FIG. 1, in step S100, steel-making slag is provided. The sources of steel-making slag are mainly by-products produced during steel-making. For example, steel-making slag may include converter-stone (basic-oxygen-furnace slag; BOF) or electric-arc-furnace slag (EAF), etc. . In this embodiment, the steel-making slag may be converter stone or electric arc slag. Since the steel-making slag can be used for the subsequent formation of fine particles in mortar or concrete, the particle size of the steel-making slag will be close to the particle size of fine particles commonly used in the general civil engineering field. In this embodiment, the particle size of the steel-making slag is less than 4.75 mm.

Next, in step S110, the steel-making slag is immersed in water so that the water forms an alkaline solution. Since the steel-making slag contains a large amount of free calcium oxide (free-CaO) from limestone added during steel-making, when the steel-making slag is immersed in water, the free calcium oxide dissolves in water to form calcium hydroxide, and The hydroxide ions are dissociated in water, causing the pH of the water to rise to form an alkaline solution. The immersion temperature of steel-making slag will affect the amount of hydroxide ions dissociated from calcium hydroxide in water. As shown in Table 1, when the immersion temperature of steel-making slag is lower, the hydroxide of calcium hydroxide dissociated from water The greater the amount of root ions, the higher the pH of the alkaline solution. In this embodiment, the immersion temperature of the steel-making slag in water is 0 ° C to 90 ° C, preferably 0 ° C to 25 ° C, and more preferably close to 0 ° C. In this embodiment, the pH value of the alkaline solution ranges from 11 to 13. In this embodiment, the steel-making slag is immersed in water to form an alkaline solution. There is no need to purchase additional alkali metal or alkaline earth metal hydroxides and sodium silicate etc. from the preparation of alkaline solution, so the required raw materials can be reduced cost.

Table 1

In addition, the weight ratio of water in the alkaline solution to the steel-making slag will also affect the pH of the alkaline solution. In this embodiment, the steel-making slag may be converter stone or electric arc slag. Therefore, water and converter are used here Take the weight ratio of stone (W / BOF) as an example. As shown in Table 2, the smaller the W / BOF, the more converter stones in the alkaline solution, and the alkaline solution contains more calcium hydroxide. Therefore, the higher the pH value in the alkaline solution; relative Ground, when W / BOF is larger, it means that there is less converter stone in the alkaline solution, and the alkaline solution contains less calcium hydroxide, therefore, the lower the pH value in the alkaline solution. In this embodiment, the range of W / BOF is 0.25 to 2.0. When the W / BOF is within this range, it can ensure that the alkaline solution contains enough hydroxide ions.

Table 2

Next, in step S120, the alkaline solution and the steel-making slag are separated. After the steel-making slag is immersed in water for a certain period of time, the amount of hydroxide ions dissociated from the calcium hydroxide in the water has reached saturation, which means that the pH value of the alkaline solution has reached equilibrium. In this embodiment, the immersion time of the steel-making slag in water is 1 to 48 hours, preferably 12 to 48 hours, and more preferably 24 hours. When the pH value of the alkaline solution reaches equilibrium, the steel-making slag can be separated from the alkaline solution. The method for separating the steel-making slag from the alkaline solution may be, for example, filtering the steel-making slag in the alkaline solution through a filter screen, but in this embodiment, it is not particularly limited.

Thereafter, in step S130, glass powder is added to the alkaline solution and stirred to form a cementing solution. The source of glass powder can be from waste glass. For example, glass powder can be obtained from various types of waste glass containers, waste glass substrates, etc., but this embodiment is not limited to this, meaning that other non-waste glass can also be As a source of glass powder in this example. In this embodiment, the glass powder can be obtained by crushing waste glass. When glass powder is added to the alkaline solution, the hydroxide ions in the alkaline solution will undergo an "alkali excitation reaction" with the glass powder to produce a cement paste-like cementing solution. The above “alkali excitation reaction” is to dissolve the silicate structure of the glass powder by hydroxide ions, and the material after the glass powder is dissolved will be re-bonded to the structure. In this embodiment, the specific surface area of the glass powder is 3000 to 20000 cm ² / g, preferably 3500 to 15000 cm ² / g, and more preferably 4000 to 10000 cm ² / g. When the specific surface area of the glass powder is within this range, since the fineness of the glass powder is sufficiently small, the reaction rate for performing the "alkali excitation reaction" can be increased. In this embodiment, the stirring time for adding the glass powder to the alkaline solution is 10 to 180 minutes, preferably 30 to 60 minutes, and more preferably 30 minutes. In this embodiment, the stirring temperature of the glass powder added to the alkaline solution is 30 ° C to 80 ° C, preferably 30 ° C to 50 ° C, and more preferably 30 ° C.

Finally, in step S140, the cement solution is cured to form a cement material. During the curing process of the cementing solution, the cementing solution gradually loses its plasticity and becomes a state without fluidity. After that, the strength of the cementing solution will gradually increase despite the passage of time, and finally it will become a cementitious material with high compressive strength. In this embodiment, the curing time of the cementing solution is 1-14 days, preferably 2-10 days, and more preferably 5 days. In this embodiment, the curing temperature of the cementing solution is 40 ° C to 95 ° C, preferably 60 ° C to 90 ° C, and more preferably 80 ° C. When the curing temperature of the cementing solution is the above temperature, the cemented material after curing can have high compressive strength. When the curing temperature of the cement solution is less than 40C, the time for the cement solution to cure into cement material will be longer, and even the cement solution will not be cured into cement material; when the curing temperature of the cement solution is greater than 95 ° C, the cement solution Although the time of curing into a cement material can be shortened, the compressive strength of the cement material will be lower due to insufficient curing time.

In addition, the weight ratio of the steel-making slag to the glass powder in the cementing solution will also affect the compressive strength of the cemented material after the cementing solution is cured. In this embodiment, the steel-making slag may be converter stone or electric arc slag. Therefore, Here, the content of the converter stone in the cement material is taken as an example. As shown in Fig. 4 and Table 3, when the curing temperature of the cement solution is 80 ° C and the curing time is 15 min, when the content of the converter stone in the cement material ranges from 10% to 70%, The cement material can have high compressive strength. Since the purpose of the present invention is to consume a large amount of steel-making slag, the range of the content of the converter stone in the cement material is preferably 20% to 50%, more preferably close to 50%.

table 3

The method of manufacturing cemented materials in this embodiment uses steel-making slag and waste glass as one of the raw materials for forming the cement material. In addition to recycling steel-making slag and waste glass, it is also possible to process steel-making slag and waste glass. The cost required and the cost of raw materials for forming the cement material are reduced. In addition, in this embodiment, hydroxide ions are generated by immersing the steel-making slag in water, so that the hydroxide ions and the glass powder undergo an "alkali excitation reaction", because the glass powder is under an alkaline solution with a pH value of> 11. The “alkaline excitation reaction” can be carried out. In this embodiment, by controlling the immersion temperature of the steelmaking slag in the alkaline solution, the pH value of the alkaline solution can be ensured to be greater than 11. Therefore, there is no need to purchase additional hydrogen of alkali metals or alkaline earth metals Oxides and sodium silicate come from the preparation of alkaline solutions, which reduces the cost of raw materials for forming cement.

FIG. 2 is a flowchart of the steps of the method for manufacturing a mortar cured product according to the first embodiment of the present invention.

Please refer to FIG. 2. Steps S200 and S210 are the same as steps S100 and S110 shown in FIG. 1 respectively, so they are not described below.

Please continue to refer to FIG. 2. In step S220, glass powder is added to the alkaline solution and stirred to form a mortar. When glass powder is added to the alkaline solution, the hydroxide ions in the alkaline solution will undergo an “alkali excitation reaction” with the glass powder to produce cement in the alkaline solution, and the cement will then react with the alkaline solution The steelmaking slag in the mixes to form a mortar. The source, type and range of the specific surface area of the glass powder have already been described in the above-mentioned example of the manufacturing method of the cement material, and therefore will not be repeated here. In this embodiment, the stirring time for adding the glass powder to the alkaline solution is 5 minutes or more, preferably 20 minutes or more, and more preferably 30 minutes or more.

Finally, in step S230, the mortar is cured to form a cured mortar. During the curing process of the mortar, the mortar gradually loses its plasticity and becomes a state of no fluidity, after which the strength of the mortar will gradually increase with time, and finally become a mortar cured product with high compressive strength. In this embodiment, the curing time of the mortar is 2-8 days, preferably 4-7 days, and more preferably 6 days. In this embodiment, the cured temperature of the mortar is 30 ° C to 80 ° C, preferably 60 ° C to 70 ° C, and more preferably 60 ° C. When the curing temperature of the mortar is the above temperature, the cured mortar can have high compressive strength. When the curing temperature of the mortar is less than 30 ° C, the curing time of the mortar into the cured mortar will be longer, and even the mortar will not be cured into the cured mortar; when the curing temperature of the mortar is greater than 80 ° C, the mortar will Although the time for curing into a mortar cured product can be shortened, the compressive strength of the mortar cured product will be lower due to insufficient curing time.

The manufacturing method of the mortar cured product in this embodiment uses steel-making slag and waste glass as raw materials in the examples of the above-mentioned cement material manufacturing method. Therefore, the cost required for processing the steel-making slag and waste glass and the The cost of raw materials forming the mortar cured product is reduced. In addition, in this embodiment, the steel-making slag is immersed in water to generate hydroxide ions, and by controlling the immersion temperature of the steel-making slag in the alkaline solution, the pH of the alkaline solution is ensured to be greater than 11. Therefore, it is not necessary The additional purchase of alkali metal or alkaline earth metal hydroxides and sodium silicate comes from the preparation of alkaline solutions, which reduces the cost of raw materials for forming mortar cured products.

3 is a flowchart of steps of a method for manufacturing a mortar cured product according to a second embodiment of the invention.

Referring to FIG. 3, steps S300, S310, and S320 are the same as steps S100, S110, and S120 shown in FIG. 1, respectively, so details are not described below.

Please continue to refer to FIG. 3. In step S330, glass powder and fine particles are added to the alkaline solution and stirred to form a mortar. When glass powder is added to the alkaline solution, the hydroxide ions in the alkaline solution will undergo an “alkali excitation reaction” with the glass powder to produce cement in the alkaline solution, and the cement will then react with the alkaline solution The fine particles in the mixture are mixed to form a mortar. The fine particles may be, for example, fine sand, stones with small particle diameters, etc., but in this embodiment, it is not limited thereto. In this embodiment, the particle size of the fine particles is less than 4.75 mm. The source, type and range of the specific surface area of the glass powder have already been described in the above-mentioned example of the manufacturing method of the cement material, and therefore will not be described in detail. In this embodiment, the stirring time for adding the glass powder and the fine particles to the alkaline solution is 5 minutes or more, preferably 20 minutes or more, and more preferably 30 minutes or more.

Finally, in step S340, the mortar is cured to form a cured mortar. In this embodiment, the curing time of the mortar is 2-8 days, preferably 4-7 days, and more preferably 6 days. In this embodiment, the cured temperature of the mortar is 30 ° C to 80 ° C, preferably 60 ° C to 70 ° C, and more preferably 60 ° C. When the curing temperature of the mortar is the above temperature, the cured mortar can have high compressive strength. When the curing temperature of the mortar is less than 30 ° C, the time for the mortar to cure into the mortar cured product will be longer, and even the mortar will not be cured into the mortar cured product; Although the time for curing into a mortar cured product can be shortened, the compressive strength of the mortar cured product will be lower due to insufficient curing time.

The manufacturing method of the mortar cured product in this embodiment uses steel-making slag and waste glass as raw materials in the examples of the above-mentioned cement material manufacturing method. Therefore, the cost required for processing the steel-making slag and waste glass and the The cost of raw materials forming the mortar cured product is reduced. In addition, in this embodiment, the steel-making slag is immersed in water to generate hydroxide ions, and by controlling the immersion temperature of the steel-making slag in the alkaline solution, the pH of the alkaline solution is ensured to be greater than 11. Therefore, it is not necessary The additional purchase of alkali metal or alkaline earth metal hydroxides and sodium silicate comes from the preparation of alkaline solutions, which reduces the cost of raw materials for forming mortar cured products.

FIG. 5 shows the cured mortar of the first embodiment placed in the case of the present invention where the cured mortar temperature is 60 ° C and the weight ratio of converter stone to glass powder (BOF / GL) is 1: 1. The graph of the relationship between the compressive strength of 0 days, 7 days and 28 days in the air and the curing time.

Referring to FIG. 5, after 2 days of curing time of the mortar cured product of the first embodiment, the compressive strength of the mortar cured product began to rise significantly with the curing time, and the curing time of the mortar cured product passed 5 days Afterwards, the compressive strength of the mortar cured product exceeded 30 MPa when placed in the air for 0 days, 7 days or 28 days. That is to say, although the mortar cured product of the first embodiment includes steel-making slag, it still has a considerable compressive strength compared to the mortar cured product commonly used in the general civil industry.

In summary, the manufacturing method of the cement material and the mortar cured product of the present invention uses steel-making slag and waste glass as one of the raw materials for forming the cement material. In addition to recycling the steel-making slag and waste glass, it can also be used The cost of processing steel-making slag and waste glass and the cost of raw materials for forming cement and mortar solidification are reduced. In addition, the present invention forms an alkaline solution by soaking the steelmaking slag in water, reacts with the hydroxide ions in the alkaline solution and the glass powder, and controls the immersion of the steelmaking slag in the alkaline solution The temperature ensures that the pH of the alkaline solution is greater than 11. Therefore, it is not necessary to purchase additional alkali metal or alkaline earth metal hydroxides and sodium silicate, etc. from the preparation of the alkaline solution, so that the raw material cost of forming the cement and mortar cured material reduce.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

S100, S110, S120, S130, S140, S200, S210, S220, S230, S300, S310, S320, S330, S340

FIG. 1 is a flowchart of steps of a method for manufacturing a cement material according to an embodiment of the invention. FIG. 2 is a flowchart of the steps of the method for manufacturing a mortar cured product according to the first embodiment of the present invention. 3 is a flowchart of steps of a method for manufacturing a mortar cured product according to a second embodiment of the invention. 4 is a graph showing the relationship between the content of the converter stone in the cement material and the compressive strength of the cement material when the temperature of the cement solution is 80 ° C. and the stirring time is 15 min. FIG. 5 shows the cured mortar of the first embodiment placed in the case of the present invention where the cured mortar temperature is 60 ° C and the weight ratio of converter stone to glass powder (BOF / GL) is 1: 1. The graph of the relationship between the compressive strength of 0 days, 7 days and 28 days in the air and the curing time.

S100, S110, S120, S130, S140, S200, S210, S220, S230, S300, S310, S320, S330, S340

Claims (20)

A method for manufacturing a cement material, comprising the following steps: providing a steel-making slag; soaking the steel-making slag in water to form an alkaline solution in the water; separating the alkaline solution from the steel-making slag; Glass powder is added to the alkaline solution and stirred to form a cementing solution; and the cementing solution is cured to form a cementing material. The method for manufacturing a cement material as described in item 1 of the patent application scope, wherein the steel-making slag includes converter stone or electric arc slag. The method for manufacturing a cement material as described in item 2 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the weight ratio of water (W) to the converter stone (BOF) (W / BOF ) Is 0.25 ~ 2.0. The method for manufacturing a cement material as described in item 1 of the patent application range, wherein the specific surface area of the glass powder is 3,000 to 20,000 cm ² / g. The method for manufacturing a cement material as described in item 1 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the temperature of the alkaline solution is adjusted to 0 ° C to 90 ° C, and In the step of curing the cementing solution, the temperature of the cementing solution is adjusted to 40 ° C to 95 ° C. A method for manufacturing a solidified mortar, comprising the following steps: providing a steel-making slag; soaking the steel-making slag in water to form an alkaline solution in the water; in the alkaline solution containing the steel-making slag Glass powder is added and stirred to form a mortar; and the mortar is cured to form a cured mortar. The method for manufacturing a solidified mortar according to item 6 of the patent application scope, wherein the steel-making slag includes converter stone or electric arc slag. The method for manufacturing a cured mortar according to item 7 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the weight ratio of water (W) to the converter stone (BOF) (W / BOF) is 0.25 ~ 2.0. The method for manufacturing a cured mortar according to item 7 of the patent application scope, wherein in the step of adding the glass powder to the alkaline solution and stirring, the converter stone (BOF) and the glass powder (GL ) Weight ratio (BOF / GL) is 0.1 ~ 1.0. The method for manufacturing a cured mortar as described in item 6 of the patent application range, wherein the specific surface area of the glass powder is 3,000 to 20,000 cm ² / g. The method for manufacturing a cured mortar according to item 6 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the temperature of the alkaline solution is adjusted to 0 ° C to 90 ° C, And in the step of curing the mortar, the temperature of the mortar is adjusted to 30 ° C to 80 ° C. A method for manufacturing a solidified mortar, comprising the following steps: providing steel-making slag; soaking the steel-making slag in water to form an alkaline solution in water; separating the alkaline solution from the steel-making slag; Adding glass powder and fine particles to the alkaline solution and stirring to form a mortar; and curing the mortar to form a cured mortar. The method for manufacturing a solidified mortar according to item 12 of the patent application scope, wherein the steel-making slag includes converter stone or electric arc slag. The method for manufacturing a cured mortar according to item 13 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the weight ratio of water (W) to the converter stone (BOF) (W / BOF) is 0.25 ~ 2.0. The method for manufacturing a cured mortar as described in item 12 of the patent application range, wherein the specific surface area of the glass powder is 3,000 to 20,000 cm ² / g. The method for manufacturing a cured mortar according to item 12 of the patent application scope, wherein in the step of immersing the steel-making slag in water, the temperature of the alkaline solution is adjusted to 0 ° C to 90 ° C, And in the step of curing the mortar, the temperature of the mortar is adjusted to 30 ° C to 80 ° C. A solidified mortar, comprising: 10-50 wt% of steel-making slag; and 50-90 wt% of cementitious material as described in item 1 of the patent application scope. The solidified mortar according to item 17 of the patent application scope, wherein the steel-making slag includes converter stone or electric arc slag. The mortar cured product as described in Item 17 of the patent application scope, wherein the particle size of the steel-making slag is less than 4.75 mm. The mortar cured product as described in item 17 of the patent application range, wherein the specific surface area of the glass powder is 3,000 to 20,000 cm ² / g.