KR101723204B1 - sludge powder of recycled water of ready mixed concrete, a manufacturing method thereof and asphalt concrete composite for surface layer - Google Patents
sludge powder of recycled water of ready mixed concrete, a manufacturing method thereof and asphalt concrete composite for surface layer Download PDFInfo
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- KR101723204B1 KR101723204B1 KR1020150130732A KR20150130732A KR101723204B1 KR 101723204 B1 KR101723204 B1 KR 101723204B1 KR 1020150130732 A KR1020150130732 A KR 1020150130732A KR 20150130732 A KR20150130732 A KR 20150130732A KR 101723204 B1 KR101723204 B1 KR 101723204B1
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/303—Alumina
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/308—Iron oxide
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
Abstract
The present invention "as a separated sludge in the ready-mixed concrete can be collected and dried to powdered, the nominal 0.6㎜ body is passed, and 100wt%, the 0.08㎜ nominal sieve has a particle size that passes through at least 70wt%, SiO 2 10 to 40 wt%, Al 2 O 3 3 to 15 wt% of Fe 2 O 3, 2 to 3 wt% of Fe 2 O 3 , 25 to 50 wt% of CaO, 1 to 3 wt% of MgO and 1 to 5 wt% of SO 3, Separating the sludge in the ready-mixed recovery water; (b) drying the separated sludge; And (c) pulverizing the dried sludge into powder having a nominal size of 0.6 mm through which 100 wt% of the sludge passes and having a size of 0.08 mm in size passing at least 70 wt% , The aggregate having a particle size of 25 mm or less in particle size, the remicon recovered sludge powder and the asphalt, wherein the remicon recovered sludge powder is mixed with 1 to 8 parts by weight based on 100 parts by weight of the aggregate, And 3 to 10 parts by weight based on 100 parts by weight of the aggregate.
Description
The present invention relates to a method for preparing a sludge, which comprises separating sludge in a ready-mixed recovered water, drying and pulverizing the sludge, and using the ready-mixed recoverable sludge powder, the ready-mixed recoverable sludge powder and the ready- And the like.
Pot holes often occur on the surface of roads packed with the ascon composition due to erosion, drainage failure, and the like. These portholes are highly dangerous to cause traffic accidents, so it is most important to prevent them from occurring, and immediate repair is necessary when they occur. Therefore, the Seoul Metropolitan Government has specified in the relevant regulations to mix anti-peeling materials to reduce potholes on the pavement of the ascon composition pavement. In addition, the Ministry of Land, Infrastructure and Transport and other municipalities are also introducing regulations that require the use of slaked lime, cement, liquid detachment preventive, etc. in the ascon composition used for road pavement.
The slaked lime is positively charged and prevents peeling of the ascon composition pavement through a mechanism for increasing the bonding force between the aggregate and the binder which are negatively charged. However, since the concrete is also positively charged, when the sludge in the ready-mixed recovery water is separated, dried and pulverized, there is a possibility to replace the slaked lime used as the anti-peeling material of the conventional paving road of the ascon composition. In addition, cement is supplied as an alternative to prevent peeling, and since a large amount of cement sludge is contained in the ready-mixed recovered water, it is a part where peeling prevention effect can be expected. However, there is no prior art to utilize the ready-mixed recycled water as anti-peeling material in the pavement of the ascon composition, and the technology to utilize it as calcium carbonate or concrete additive has been introduced.
The present invention relates to a method for preparing a sludge, which comprises separating sludge in a ready-mixed recovered water, drying and pulverizing the sludge, and using the ready-mixed recoverable sludge powder, the ready-mixed recoverable sludge powder and the ready- The present invention also provides a surface-layered asbestos composition.
In order to solve the above-mentioned problem, the present invention is characterized in that " sludge in remicon reclaimed water is separated and dried and pulverized, wherein a sieve having a nominal diameter of 0.6 mm passes through at least 95 wt% the nominal ㎜ body is passed through more than 90wt%, of the nominal 0.08㎜ body has a particle size that passes through at least 70wt%, SiO 2 10 to 40 wt%, Al 2 O 3 3 to 15 wt% of Fe 2 O 3, 2 to 3 wt% of Fe 2 O 3 , 25 to 50 wt% of CaO, 1 to 3 wt% of MgO and 1 to 5 wt% of SO 3 .
Further, the present invention provides a method for separating sludge, comprising: (a) separating sludge in a ready-mixed recovered water; (b) drying the separated sludge; And (c) the dried sludge is passed through 100 wt% of sieves having a nominal diameter of 0.6 mm, more than 95 wt% of sieves having a nominal diameter of 0.3 mm, 90 wt% or more of sieves having a nominal diameter of 0.15 mm, % Of the total amount of the sludge to be treated.
Also, the present invention is characterized in that: the aggregate having a particle size of 25 mm or less, the ready-mixed recoverable sludge powder and the asphalt are mixed, the ready-mixed recoverable sludge powder is mixed with 1 to 8 parts by weight relative to 100 parts by weight of the aggregate, Wherein the asphalt is incorporated in an amount of 3 to 10 parts by weight based on 100 parts by weight of the aggregate.
The present invention has the following effects.
1. Compared with the case of using the conventional anti-peeling material, it is possible to obtain the effect of improving the cracking resistance while maintaining the peeling resistance of the pavement on the pavement.
2. It is possible to protect the environment through waste recycling by presenting the productive use place of remicon reclaimed water.
[Fig. 1] is a schematic view of a slaked lime manufacturing process used as an anti-peeling material of a conventional ascon composition.
FIG. 2 is a table showing data of indirect tensile strength and tensile strength ratio of Examples and Comparative Examples according to the present invention. FIG.
Hereinafter, the present invention will be described in detail.
1. Remicon Recovered number Sludge powder
The ready-mixed recoverable sludge powder according to the present invention is obtained by separating and drying the sludge in the ready-mixed recovered water, powdered, passed through 100 wt% of the body of 0.6 mm name, 95 wt% or more of the body of 0.3 mm title, the nominal ㎜ body is passed through more than 90wt%, of the nominal 0.08㎜ body has a particle size that passes through at least 70wt%, SiO 2 10 to 40 wt%, Al 2 O 3 3 to 15 wt% of Fe 2 O 3, 2 to 3 wt% of Fe 2 O 3 , 25 to 50 wt% of CaO, 1 to 3 wt% of MgO and 1 to 5 wt% of SO 3 .
In general, limestone, Portland cement, slaked lime, recovered dust and the like are used as fillers of the ascon composition, and the particle size should satisfy the requirements of KS F 3501 (filler for asphalt pavement). Therefore, in order to utilize the ready-mixed recoverable sludge powder as the filler of the ascon composition, it is required to satisfy the above standard. Specifically, the particle size criterion shown in Table 1 below should be satisfied in the state where the foreign substance is removed.
The ready-mixed recoverable sludge powder according to the present invention satisfies the criterion of [Table 1]. Therefore, it can be utilized as a filler of an ascon composition.
2. Remicon Recovered number Sludge Manufacturing method of powder
The method of manufacturing a ready-mixed recoverable sludge powder according to the present invention comprises the steps of: (a) separating sludge in a ready-mixed recovered water; (b) drying the separated sludge; And (c) the dried sludge is passed through 100 wt% of sieves having a nominal diameter of 0.6 mm, more than 95 wt% of sieves having a nominal diameter of 0.3 mm, 90 wt% or more of sieves having a nominal diameter of 0.15 mm, By weight or more of the total weight of the composition.
In the step (a), the collected sludge settled in the remicon factory may be directly extracted by using a backhoe, or the collected sludge may be collected by collecting the ready-mixed recovered water with a settler. The step (b) and the step (c) may be carried out in such a manner that the dry milling process of the slaked lime manufacturing process as shown in FIG. 1 is applied as it is, have. Meanwhile, the pulverization in the step (c) should be performed so as to be a product conforming to KS F 3501 (filler for asphalt pavement).
3. Surface Composition
The surface-layered asbestos composition according to the present invention comprises aggregate having a particle size of 25 mm or less, the ready-mixed recovered water sludge powder and asphalt, wherein the ready-mixed recoverable water sludge powder is mixed with 1 to 8 parts by weight And 3 to 10 parts by weight of the asphalt is mixed with 100 parts by weight of the aggregate.
The above-mentioned asbestos composition for surface layer may be formed by heating the aggregate, adding the remicon-recoverable sludge powder, performing the dry bean-beam, and then injecting asphalt to mix and discharge. It is characterized by the use of recovered sludge powder.
The quality standard for the surface layer asbestos composition is as follows: Deformation strength (MPa) is 4.25 or more, Marshall stability (N) is 7500 or more, Flow value (1 / 100cm) is 20 to 40, Porosity (vol% The saturation (%) is in the range of 65 to 80 and the aggregate porosity (%) is in accordance with the standard SPS-KAI0002-F2349-5687. The BVF (%) is 60 or less and the tensile strength ratio (TSR) is 0.8 or more.
In order to verify the physical properties of the surface-layered asbestos composition according to the present invention, the following tests were conducted.
The specimens used WC-2 grain size, which is the standard specification of the mix design particle size of the surface layer asphalt mixture. For TSR test specimens, the number of compaction was varied to meet the reference porosity (7 ± 0.5%) according to the water resistance test method of asphalt mixture (KS F 2398) After the work, the test was carried out. [Table 2] shows WC-2 particle size.
100
92
70
50
30
21
16
8
The blending ratio was 1 part by weight of the remicon recoverable sludge powder with respect to 100 parts by weight of aggregate and 5.5 parts by weight of asphalt with respect to 100 parts by weight of aggregate, and the mixing temperature was maintained at 155 캜 and the compaction temperature was maintained at 150 캜. Each test was carried out in a set of three specimens and the mean value was derived.
The surface-layered asbestos composition according to the present invention comprises aggregate having a particle size of 25 mm or less, the ready-mixed recovered water sludge powder and asphalt, wherein the ready-mixed recoverable water sludge powder is mixed with 1 to 8 parts by weight And 3 to 10 parts by weight of the asphalt is mixed with 100 parts by weight of the aggregate. The aggregate of the bar specimen has a particle size of 25 mm or less.
The physical properties of the thus prepared surface-layered asbestos composition were measured and found to satisfy the quality standards of the surface-layered ascon composition. The specific quality measurement results are shown in [Table 3] below.
In the test items of the Ascon quality standard test items, the test for determining moisture resistance is a tensile strength ratio (TSR) test. In the comparative example in which the slaked lime powder was used as a peeling preventive material and in the examples of the present invention, the tensile strength ratio was measured according to KS F 2398 The results are shown in [Table 4] and [Table 5] below, respectively. In the comparative example in which the slaked lime powder was used as a peeling preventive material, the mixing ratio was 1 part by weight of the slaked lime powder to 100 parts by weight of the aggregate and 5.5 parts by weight of the asphalt to 100 parts by weight of the aggregate, And maintained at 150 캜. [Table 5] shows that the embodiment according to the present invention satisfies the tensile strength ratio standard for the ascon composition.
In addition, [Figure 2] shows the indirect set tensile strength of the comparative examples different from the examples of the surface layer asbestos composition according to the present invention. The combination conditions of the specimens used for securing the data in [FIG. 2] are as follows. First, in the case of a general Ascon concrete specimen, 1 part by weight of a general quartz filler powder was mixed with 100 parts by weight of an aggregate, and 5.5 parts by weight of asphalt was mixed with 100 parts by weight of an aggregate, and the mixing temperature was maintained at 155 ° C and the compaction temperature was maintained at 150 ° C. Also, in the case of the specimens using the calcium hydroxide powder, the blending ratio was 1 part by weight of the calcium hydroxide powder and 100 parts by weight of the aggregate and 5.5 parts by weight of the asphalt to 100 parts by weight of the aggregate, and the mixing temperature was 155 ° C and the compaction temperature was 150 ° C. Also, in the case of specimens using the remicon recovery sludge powder, 1 part by weight of the slaked lime powder was compared with 100 parts by weight of the aggregate, and 5.5 parts by weight of asphalt was compared with 100 parts by weight of the aggregate, and the mixing temperature was maintained at 155 ° C and the compaction temperature was maintained at 150 ° C. Finally, in the case of the specimen using the liquid peeling preventive material, 1 part by weight of the powder of the general quartz filler is added to 100 parts by weight of the aggregate, and 5.5 parts by weight of the asphalt is added to 0.5 parts by weight of the asphalt. The mixing temperature was maintained at 155 ° C and the compaction temperature was maintained at 150 ° C.
The indirect tensile strength is an index indicating the resistance to cracking. Referring to FIG. 2, the embodiment according to the present invention has a relatively high value. Therefore, it can be seen that the surface-layered asbestos composition according to the present invention exhibits a comparatively high level of cracking resistance while having an equivalent level of peel resistance as compared with the surface layer asbestos composition using the conventional peel-off material.
none
Claims (3)
The ready-mixed recovered water sludge powder was prepared by separating and drying the sludge in the ready-mixed recovered water, and passed through 100 wt% of a body having a nominal diameter of 0.6 mm, passing 95 wt% or more of a body having a 0.3 mm nominal body, Of SiO 2 , 3 to 15 wt% of Al 2 O 3 , 2 to 3 wt% of Fe 2 O 3 , 25 to 30 wt% of CaO, 1 to 3 wt% of MgO, 1 to 5 wt% of SO 3, and is in conformity with the KS F 3501 standard,
1 to 8 parts by weight of the remicon recovery sludge powder is mixed with 100 parts by weight of the aggregate and 3 to 10 parts by weight of the asphalt is mixed with 100 parts by weight of the aggregate,
A Marshall stability of at least 7500, a flow value of 20 to 40, a porosity of 3 to 6, and a tensile strength ratio of 0.8 or more.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150130732A KR101723204B1 (en) | 2015-09-16 | 2015-09-16 | sludge powder of recycled water of ready mixed concrete, a manufacturing method thereof and asphalt concrete composite for surface layer |
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| KR1020150130732A KR101723204B1 (en) | 2015-09-16 | 2015-09-16 | sludge powder of recycled water of ready mixed concrete, a manufacturing method thereof and asphalt concrete composite for surface layer |
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| KR20170032990A KR20170032990A (en) | 2017-03-24 |
| KR101723204B1 true KR101723204B1 (en) | 2017-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220095345A (en) | 2020-12-29 | 2022-07-07 | (주)신성건설 | Light Weight Mortar Composite Using Ready-mixed Concrete Recovery Water |
| KR20220105706A (en) | 2021-01-20 | 2022-07-28 | 원광대학교산학협력단 | Eco-friendly mortar composition with blast furnace slag fine aggregate and ready-mixed concrete recovered water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005082477A (en) * | 2003-09-09 | 2005-03-31 | Takaya:Kk | Method of recycling ready mixed concrete sludge and recycled material of ready mixed concrete produced by the same method |
| JP2008050189A (en) | 2006-08-23 | 2008-03-06 | Sankei Kogyo:Kk | Ready mixed concrete sludge regenerating method and regenerated material |
| JP2010001202A (en) | 2008-06-23 | 2010-01-07 | Shoji Sawada | Regenerating and producing method of ready-mixed concrete sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950031975A (en) * | 1994-05-30 | 1995-12-20 | 김미라 | Ascon Production Method Using Waste Limestone Sludge |
| KR20150059370A (en) | 2013-11-22 | 2015-06-01 | 주식회사 애니텍 | Liquid carbonate using ready mixed concrete water and process for producing calcium carbonateion |
| KR101470307B1 (en) | 2014-08-01 | 2014-12-08 | 안웅건 | Concrete chemical admixtures and Method for nontoxic concrete used recovered remicon water |
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- 2015-09-16 KR KR1020150130732A patent/KR101723204B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005082477A (en) * | 2003-09-09 | 2005-03-31 | Takaya:Kk | Method of recycling ready mixed concrete sludge and recycled material of ready mixed concrete produced by the same method |
| JP2008050189A (en) | 2006-08-23 | 2008-03-06 | Sankei Kogyo:Kk | Ready mixed concrete sludge regenerating method and regenerated material |
| JP2010001202A (en) | 2008-06-23 | 2010-01-07 | Shoji Sawada | Regenerating and producing method of ready-mixed concrete sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220095345A (en) | 2020-12-29 | 2022-07-07 | (주)신성건설 | Light Weight Mortar Composite Using Ready-mixed Concrete Recovery Water |
| KR20220105706A (en) | 2021-01-20 | 2022-07-28 | 원광대학교산학협력단 | Eco-friendly mortar composition with blast furnace slag fine aggregate and ready-mixed concrete recovered water |
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| KR20170032990A (en) | 2017-03-24 |
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