CN1270149A - Reused aggregates for concrete and precast products of concrete - Google Patents
Reused aggregates for concrete and precast products of concrete Download PDFInfo
- Publication number
- CN1270149A CN1270149A CN99120867A CN99120867A CN1270149A CN 1270149 A CN1270149 A CN 1270149A CN 99120867 A CN99120867 A CN 99120867A CN 99120867 A CN99120867 A CN 99120867A CN 1270149 A CN1270149 A CN 1270149A
- Authority
- CN
- China
- Prior art keywords
- concrete
- coal ash
- weight part
- waste liquid
- regeneration aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0418—Wet materials, e.g. slurries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention produces precast concrete products which can be used as precast materials for civil engineering and construction be mixing coal ash, cement, water and a binder into waste liquids of various kinds different in characteristics in a suitable manner depending on the characteristics of the waste liquids and solidifying and aging the resultant mixture in molds.
Description
The present invention relates to the concrete regenerating aggregate of the waste liquid recovery that gives off from each factories such as chemical production, oil refining industry, ironmaking industry, pharmacy industries, and the concrete prefabricated product that make with the regeneration aggregate with this concrete.
Because the pH value of the waste liquid (comprising the pasty state or the paste-like that are transformed into by liquid) that each factory gives off has nothing in common with each other (acid, neutral or alkalescence), so, be difficult to handle together.Therefore, all be according to the proterties of the waste liquid of each factory's release in the past, by approach such as neutralization, dilution or concrete curings waste liquid is handled.The waste liquid that includes harmful substances also needs to carry out harmless treatment sometimes.
For example, USP5,434,333 provide the method for utilizing cement or glass castoff to be turned to harmless solid substance.USP5,433,520 have proposed mixed cement raw material and coal ash, add liquid slurry again, mix continuously, dry, solidified method and device.USP5,849,075 have proposed to replace the technology of cement as the raw material of concrete and mortar with ground bottom ash (waste that coal combustion produces).In addition, USP4,880,468 have proposed to comprise the waste curing composition of water cement, coal ash and fumigation silica material.
In the past, the various waste liquids of single traits had all been determined corresponding effective treating method.And, in most cases after curing, gone into underground through the waste liquid of harmless treatment by landfill.
As mentioned above, various waste liquids were not combined in the past and handled.This is that more or less for the amount of the waste liquid of various proterties because the proterties of waste liquid has nothing in common with each other, and is not suitable for handling with the traditional method of the waste liquid of handling single traits.And, be difficult to obtain the landfill soil now, so, begin one's study by waste liquid thoroughly being handled the method that replaces landfill.
Therefore, present inventors to the waste liquid that proterties is different combine carry out harmless treatment after, further the treatment process of the waste liquid of recycling is studied.
Promptly, developed in the mixed solution of the different various waste liquids of the waste liquid with single traits or proterties and added coal ash, utilize the ettringite class in this coal ash that waste liquid or mixed solution are adjusted into alkalescence, mix the concrete regeneration aggregate that the back obtains, and add cement, water and tackiness agent with regeneration in the aggregate at this concrete, mix the after fixing maintenance and obtain concrete prefabricated product.
Fig. 1 is the schema of civil construction of the present invention with the manufacture method of concrete prefabricated product.
Have the waste liquid of single traits or merge the different waste liquid of proterties and add 40～65 weight portion coal ash in the mixed liquor that obtains at 100 weight portions, can generate the reinforcement of concrete regeneration aggregate after the mixing. Utilize the water sorption of coal ash, the gained aggregate of regenerating is made the pasty state that is easy to mix, if necessary, also can carry out in addition processed.
The present invention adds coal ash in waste liquid or mixed liquor, make it be paste-like, and the gained aggregate of regenerating is used for the processing method of waste liquid of the manufacturing of concrete prefabricated product. No matter the pH value of waste liquid how, waste liquid that can both proterties is different carries out mixed processing. The waste liquid that can process or mixed liquor comprise organic system alkaline waste liquor, organic system acid waste liquid, inorganic be alkaline waste liquor, inorganic be in acid waste liquid or the neutral waste liquid any, or their mixed liquor.
Feature of the present invention can combine various waste liquids exactly and handle.This is because the ettringite class (CaOAl in the coal ash
2O
3) acid in each waste liquid or alkali are worked, the pH of waste liquid can be adjusted to the alkalescence (pH value 8～12) that is suitable for concrete curing.Therefore, the concrete prefabricated product that utilize regeneration aggregate of the present invention to make show enough intensity when reality is used.
If the coal ash amount that is mixed in 100 weight part waste liquids or the mixed solution is less than 40 weight parts, then can become mobile higher aqueous regeneration aggregate because of poor dewatering causes curing insufficient, so just be difficult to be applicable to the manufacturing of concrete prefabricated product.On the contrary, inhomogeneous if aforementioned coal ash amount, then can become the uneven regeneration aggregate of dehydration greater than 65 weight parts with mixing of other cement materials, so just can not guarantee that concrete prefabricated product possess enough intensity.
Add 15～25 parts by weight of cement, 2～8 weight parts waters and 1～7 weight part tackiness agent with regeneration in the aggregate at the above-mentioned concrete of 100 weight parts, just can make concrete prefabricated product after the mixing cured maintenance.
If the cement that joins in the aforementioned 100 weight parts regeneration aggregate is less than 15 weight parts, the intensity of the concrete prefabricated product after then solidifying can go wrong, and more than 25 weight parts, then economical inadequately.In addition, if the addition of tackiness agent is less than 1 weight part, then the intensity of cured article can go wrong, and more than 7 weight parts, then economical inadequately.
As tackiness agent, there are clay, talcum powder, white bole, acidic white earth and water glass in inorganic system, and organic system has the naphthalene sulfonic acidformaldehyde condensation product resin, can use wherein any or their composition.
An example of the embodiment of the invention described above is shown in the schema of Fig. 1.
Embodiment 1
Be mixed into 40 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in 100 weight parts contain the organic system alkaline waste liquor (pH10) of 15wt% mud and 5wt% oily components, then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 3 weight parts waters, 5 weight part talcum powder (inorganic is tackiness agent) and 2 weight part Mighty3000 (KAO. Corp. SA's systems, the organic system tackiness agent), it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 348kg/cm
2, can be used as civil construction and use with material.
Above-mentioned concrete prefabricated product are immersed in the distilled water, after 24 hours soak solution is analyzed, consequently, cadmium content below the 0.1mg/L, content of 6-valence Cr ions below the 0.1mg/L, arsenic content below the 0.1mg/L, lead content below the 0.1mg/L, mercury content is below 0.005mg/L.Can find out from The above results, environment is had no adverse effects, can confirm to make waste liquid obtain harmless treatment by the present invention.
Embodiment 2
Be mixed into 50 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in 100 weight parts contain the organic system acid waste liquid (pH3) of 30wt% mud and 5wt% oily components, then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 2 weight parts waters, 4 weight part clays and 1 weight part Mighty3000, it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 286kg/cm
2, can be used as civil construction and use with material.
Embodiment 3
Containing the inorganic of 30wt% mud and 5wt% oily components at 100 weight parts is to be mixed into 40 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in the alkaline waste liquor (pH10), and then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 3 weight parts waters, 4 weight part clays and 2 weight part Mighty3000 (KAO. Corp. SA's systems, the organic system tackiness agent), it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 305kg/cm
2, can be used as civil construction and use with material.
Embodiment 4
Containing the inorganic of 30wt% mud and 5wt% oily components at 100 weight parts is to be mixed into 50 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in the acid waste liquid (pH3), and then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 3 weight parts waters, 3 weight part acidic white earths and 2 weight part Mighty3000, it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 195kg/cm
2, can be used as civil construction and use with material.
Embodiment 5
Be mixed into 45 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in 100 weight parts contain the neutral waste liquid (pH7) of 30wt% mud and 5wt% oily components, then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 3 weight parts waters and 4 weight part white boles, it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 190kg/cm
2, can be used as civil construction and use with material.
Embodiment 6
Organic system acid waste liquid (pH3), 25 weight parts that organic system alkaline waste liquor (pH10), 25 weight parts that 25 weight parts are contained 15wt% mud and 5wt% oily components contain 30wt% mud and 5wt% oily components contain 30wt% mud and 5wt% oily components inorganic be alkaline waste liquor (pH10) and 25 weight parts to contain the inorganic of 30wt% mud and 5wt% oily components be that acid waste liquid (pH3) merges, form mixed solution.Be mixed into 50 weight part coal ash (containing the 30wt% ettringite class of having an appointment) in 100 weight part mixed solutions, then, dehydration obtains the regeneration aggregate until no longer slump.Then, in this 100 weight part regeneration aggregate, be mixed into 20 parts by weight of cement, 3 weight parts waters, 3 weight part acidic white earths and 2 weight part Mighty3000, it is flowed in the template, at room temperature solidify the maintenance back and obtain concrete prefabricated product.The intensity of these concrete prefabricated product after 2 weeks is 282kg/cm
2, can be used as civil construction and use with material.
Above embodiment is summarized in table 1 and table 2.
Table 1
*1 ratio corresponding to 100 weight part waste liquids or mixed solution.
*2 ratios corresponding to 100 weight parts regeneration aggregate.
| ?pH | Mud (wt%) | Oily components (wt%) | Coal ash (weight part) *1 | Cement (weight part) *2 | Water (weight part) *2 | Tackiness agent (weight part) *2 | |
| Organic system alkaline waste liquor (embodiment 1) | 8～12 | ??～15 | ????5 | ???40～50 | ????20 | ????2～5 | ????5～7 |
| Organic system acid waste liquid (embodiment 2) | 3～6 | ??～15 | ????5 | ???50～60 | ????20 | ????2～5 | ????3～5 |
| Inorganic is alkaline waste liquor (embodiment 3) | 8～12 | ??～30 | ????5 | ???40～55 | ????20 | ????2～5 | ????4～6 |
| Inorganic is acid waste liquid (embodiment 4) | 3～6 | ??～30 | ????5 | ???50～65 | ????20 | ????2～5 | ????2～5 |
| Neutral waste liquid (embodiment 5) | 6～8 | ??～30 | ????5 | ???45～60 | ????20 | ????2～5 | ????～4 |
| Organic system and inorganic be the equivalent mixed liquor (embodiment 6) of waste liquid | 5.5～ 9 | ??～22.5 | ????5 | ???45～55 | ????20 | ????2～5 | ????4～6 |
Table 2
| Intensity (kg/cm 2) (after 2 weeks) | Stripping quantity (mg/L) | |||||
| Cadmium | Sexavalent chrome | Arsenic | Plumbous | Mercury | ||
| Organic system alkaline waste liquor (embodiment 1) | ????348 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
| Organic system acid waste liquid (embodiment 2) | ????286 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
| Inorganic is alkaline waste liquor (embodiment 3) | ????305 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
| Inorganic is acid waste liquid (embodiment 4) | ????195 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
| Neutral waste liquid (embodiment 5) | ????190 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
| Organic system and inorganic be the equivalent mixed liquor (embodiment 6) of waste liquid | ????282 | ＜0.1 | ??＜0.1 | ＜0.1 | ＜0.1 | ＜0.005 |
As described herein, the waste liquids that proterties is different combine, and it is carried out complicated pre-treatment, make it innoxious, can obtain to be suitable as the concrete prefabricated product that civil construction is used with material.The invention provides the technology that the manufacturing of liquid waste disposal and effective material is had concurrently benefit.
Claims (10)
1. a concrete is characterized in that with the regeneration aggregate, adds coal ash in having the waste liquid of single traits, utilizes the ettringite class in the described coal ash that the pH of waste liquid is adjusted into alkalescence, mixes the back and obtains.
2. concrete as claimed in claim 1 also is with regeneration aggregate, its feature, corresponding to 100 weight part waste liquids, adds 40～65 weight part coal ash, mixes the back and obtains.
3. a concrete is characterized in that with the regeneration aggregate, adds coal ash in the mixed solution that obtains merging the different various waste liquids of proterties, utilizes the ettringite class in the described coal ash that the pH of mixed solution is adjusted into alkalescence, mixes the back and obtains.
4. concrete as claimed in claim 3 also is with regeneration aggregate, its feature, corresponding to 100 weight part mixed solutions, adds 40～65 weight part coal ash, mixes the back and obtains.
As claim 1 or 3 described concrete with the regeneration aggregates, waste liquid wherein be organic system alkaline waste liquor, organic system acid waste liquid, inorganic be alkaline waste liquor, inorganic be acid waste liquid and neutral waste liquid.
6. concrete prefabricated product, it is characterized in that, in having the waste liquid of single traits, add coal ash, utilize the ettringite in the described coal ash that the pH of waste liquid is adjusted into alkalescence, the concrete that obtains after mixing obtains after the mixing cured maintenance with adding cement, water and tackiness agent in the regeneration aggregate.
7. concrete prefabricated product as claimed in claim 6, its feature also is, in 100 weight part waste liquids, add 40～65 weight part coal ash, mix the back and obtain concrete regeneration aggregate, in 100 weight parts regeneration aggregate, add 15～25 parts by weight of cement, 2～8 weight parts waters and 1～7 weight part tackiness agent, obtain after the mixing cured maintenance.
8. concrete prefabricated product, it is characterized in that, add coal ash in the mixed solution that forms merging the different various waste liquids of proterties, utilize the ettringite in the described coal ash that the pH of mixed solution is adjusted into alkalescence, the concrete that obtains after mixing obtains after the mixing cured maintenance with adding cement, water and tackiness agent in the regeneration aggregate.
9. concrete prefabricated product as claimed in claim 8, its feature also is, in 100 weight part mixed solutions, add 40～65 weight part coal ash, mix the back and obtain concrete regeneration aggregate, in 100 weight parts regeneration aggregate, add 15～25 parts by weight of cement, 2～8 weight parts waters and 1～7 weight part tackiness agent, obtain after the mixing cured maintenance.
10. as claim 6 or 8 described concrete prefabricated product, tackiness agent wherein is the composition of any or they of clay, talcum powder, white bole, acidic white earth, water glass, naphthalenesulfonateformaldehyde formaldehyde condensation resins body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10168199A JP3274847B2 (en) | 1999-04-08 | 1999-04-08 | Manufacturing method of precast material for civil engineering construction by solidification of waste |
| JP101681/99 | 1999-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1270149A true CN1270149A (en) | 2000-10-18 |
Family
ID=14307099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99120867A Pending CN1270149A (en) | 1999-04-08 | 1999-09-30 | Reused aggregates for concrete and precast products of concrete |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3274847B2 (en) |
| KR (1) | KR20000067782A (en) |
| CN (1) | CN1270149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107614794A (en) * | 2015-07-03 | 2018-01-19 | 株式会社库林卡 | The domatic maintenance construction method of coal ash is used |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104066699A (en) * | 2011-11-10 | 2014-09-24 | 沙特阿拉伯石油公司 | Utilization of heavy oil ash to produce self-consolidated concrete |
| CN109180086B (en) * | 2018-11-05 | 2021-07-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for simultaneously treating laboratory inorganic waste liquid and ferrous metallurgy waste residue |
-
1999
- 1999-04-08 JP JP10168199A patent/JP3274847B2/en not_active Expired - Fee Related
- 1999-09-30 CN CN99120867A patent/CN1270149A/en active Pending
- 1999-10-01 KR KR1019990042169A patent/KR20000067782A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107614794A (en) * | 2015-07-03 | 2018-01-19 | 株式会社库林卡 | The domatic maintenance construction method of coal ash is used |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000067782A (en) | 2000-11-25 |
| JP3274847B2 (en) | 2002-04-15 |
| JP2000288531A (en) | 2000-10-17 |
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