CN104193274A - Alkali slag foamed concrete - Google Patents

Alkali slag foamed concrete Download PDF

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Publication number
CN104193274A
CN104193274A CN201410431394.6A CN201410431394A CN104193274A CN 104193274 A CN104193274 A CN 104193274A CN 201410431394 A CN201410431394 A CN 201410431394A CN 104193274 A CN104193274 A CN 104193274A
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parts
slag
alkali
foamed concrete
water
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CN201410431394.6A
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Chinese (zh)
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CN104193274B (en
Inventor
杨长辉
王磊
杨凯
晏维江
江星
陈科
傅博
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Chongqing University
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Chongqing University
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Abstract

The invention discloses an alkali slag foamed concrete which comprises slag and an alkali activator, wherein the alkali activator is sodium hydroxide or water glass. When the alkali activator is sodium hydroxide, the alkali slag foamed concrete is composed of the following components in parts by mass: 59-65 parts of slag, 5-6% of NaOH, 23-26 parts of water and 4.8-12.2 parts of foaming agent. When the alkali activator is water glass, the alkali slag foamed concrete is composed of the following components in parts by mass: 56-61 parts of slag, 9-11 parts of water glass, 21-25 parts of water and 5.0-12.2 parts of foaming agent. The volume weight of the foamed concrete is 290-610 kg/m<3>. The alkali slag foamed concrete has the advantages of short setting time, quick strength development, higher later strength, excellent water resistance and excellent weather resistance, and can be used for a long time.

Description

Alkali slag foamed concrete
Technical field
The invention belongs to building material field, relate to foamed concrete, particularly a kind of alkali slag foamed concrete.
Background technology
Foamed concrete is to adopt whipping agent to go out foam by machine made, then foam is added to gelling material slurry, makes foam slip, then moulding or cast-in-place, the light porous lagging material forming through natural curing, vapor cure.In recent years, the extensive implementation of national energy-saving policy, has accelerated foamed concrete industry development, and its annual production and Application Areas increase gradually.
At present, the gelling material of foamed concrete is mainly ordinary Portland cement, aluminosulfate cement, ferro-aluminate cement, volcano grey matter composite gelled material both at home and abroad.This causes existing foamed concrete ubiquity long time of coagulation, and strength development is slow, and striking time is long, and (volume density is 800kg/m to the defect that ultimate compression strength is low 3~850kg/m 3foamed concrete, ultimate compression strength is lower than 2MPa, density is lower than 400kg/m 3time, undercapacity 0.5MPa).
As everyone knows, the intensity of foamed concrete and dry density and thermal and insulating performance are conflicting, and under low density condition, obtaining high strength must have high strength matrix to do basis.For this reason, someone uses magnesium gelatinous material, has prepared density 380kg/m 3, the foamed concrete of intensity 1.0MPa, but magnesium cement poor water resistance easily decomposes when life-time service, makes strength degradation, has frosting simultaneously, returns the defects such as halogen.
Alkali slag agglutination material is the novel gelled material taking alkali metal compound and levigate blast furnace slag as main ingredient, is also the gelling material of tool potentiality to be exploited of generally acknowledged both at home and abroad 21st century.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of alkali slag foamed concrete.
For achieving the above object, the invention provides following technical scheme:
Alkali slag foamed concrete, comprises slag and alkali-activator, and described alkali-activator is sodium hydroxide or water glass, and when alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~65 parts;
NaOH:5~6 part;
Water: 23~26 parts;
Whipping agent: 4.8~12.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 56~61 parts;
Water glass: 9~11 parts;
Water: 21~25 parts;
Whipping agent: 5.0~12.2 parts;
The unit weight of described foamed concrete is 290-610kg/m 3.
As alkali slag foamed concrete of the present invention preferably, described slag is blast furnace slag, its specific surface area is 440-460m 2/ kg, density is 2.85-2.95g/cm 3, basicity factor M 0=0.95~1.05, reactivity coefficient M a=0.42~0.48, quality coefficient M k=1.65~1.85.
As alkali slag foamed concrete of the present invention preferably, described slag is composed of the following components by mass: SiO 2: 30~34 parts; Al 2o 3: 12~16 parts; Fe 2o 3: 0.5~1.0 part; MgO:8~12 part; CaO:34~38 part; Na 2o:0.5~1.0 part; K 2o:0.1~0.5 part; Loss on ignition: 0.5~1.5 part; Other: 0.5~3.0 part.
As alkali slag foamed concrete of the present invention further preferably,
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 63~65 parts;
NaOH:5~6 part;
Water: 25~26 parts;
Whipping agent: 4.8~5.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 60~61 parts;
Water glass: 10~11 parts;
Water: 24~25 parts;
Whipping agent: 5.0~5.4 parts;
The unit weight of described foamed concrete is 590~610kg/m 3.
As alkali slag foamed concrete of the present invention further preferably,
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 62~63 parts;
NaOH:5~6 part;
Water: 25~26 parts;
Whipping agent: 6.3~6.7 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~60 parts;
Water glass: 9~10 parts;
Water: 23~24 parts;
Whipping agent: 6.5~6.9 parts;
The unit weight of described foamed concrete is 490~510kg/m 3.
As alkali slag foamed concrete of the present invention further preferably,
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 60~61 parts;
NaOH:5~6 part;
Water: 24~25 parts;
Whipping agent: 8.8~9.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 57~58 parts;
Water glass: 9~10 parts;
Water: 21~22 parts;
Whipping agent: 9.3~9.7 parts;
The unit weight of described foamed concrete is 390~410kg/m 3.
As alkali slag foamed concrete of the present invention further preferably,
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~60 parts;
NaOH:5~6 part;
Water: 23~24 parts;
Whipping agent: 11.8~12.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 56~57 parts;
Water glass: 9~10 parts;
Water: 21~23 parts;
Whipping agent: 11.8~12.2 parts;
The unit weight of described foamed concrete is 290~310kg/m 3.
The present invention prepares the method for described alkali slag foamed concrete, comprises the following steps:
1), choose starting material by proportioning;
2), mixing step 1) selected slag and alkali-activator the stirring that adds water;
3), to step 1) processing adds water and foams in selected whipping agent;
4), by step 3) gained foam adds step 2) gained alkali slag slurry, stir both to evenly mixing;
5), build maintenance and obtain alkali slag foamed concrete.
Beneficial effect of the present invention is:
The gelling material of the present invention taking alkali slag as foamed concrete, and slag, concrete component and content are optimized; The alkali slag foamed concrete rate of set finally obtaining is short, and strength development is fast, and later strength is higher, if density is 400kg/m 3time, 1d is collapsible die, 28d intensity can reach 2MPa (as described in Example 6); In addition, foamed concrete of the present invention is water-fast, weather resistance is excellent, can life-time service.
Brief description of the drawings
In order to make object of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is that the present invention prepares alkali slag foamed concrete process flow sheet.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment 1:
The present embodiment is prepared the method for alkali slag foamed concrete, comprises the following steps:
1), choose starting material by proportioning, the selected starting material of the present embodiment are: slag: 63~65 parts; NaOH:5~6 part; Water: 25~26 parts; Whipping agent: 4.8~5.2 parts;
2), mixing step 1) selected slag and alkali-activator the stirring that adds water;
3), to step 1) processing adds water and foams in selected whipping agent;
4), by step 3) gained foam adds step 2) gained alkali slag slurry, stir both to evenly mixing;
5), build maintenance and obtain alkali slag foamed concrete.
In the present embodiment:
Described slag is blast furnace slag, and its specific surface area is 440-460m 2/ kg, density is 2.85-2.95g/cm 3, basicity factor M 0=0.95~1.05, reactivity coefficient M a=0.42~0.48, quality coefficient M k=1.65~1.85;
Described slag is composed of the following components by mass: SiO 2: 30~34 parts; Al 2o 3: 12~16 parts; Fe 2o 3: 0.5~1.0 part; MgO:8~12 part; CaO:34~38 part; Na 2o:0.5~1.0 part; K 2o:0.1~0.5 part; Loss on ignition: 0.5~1.5 part; Other: 0.5~3.0 part.
Embodiment 2:
The present embodiment is prepared the method for alkali slag foamed concrete, comprises the following steps:
1), choose starting material by proportioning, the selected starting material of the present embodiment are: slag: 60~61 parts; Water glass: 10~11 parts; Water: 24~25 parts; Whipping agent: 5.0~5.4 parts;
2), mixing step 1) selected slag and alkali-activator the stirring that adds water;
3), to step 1) processing adds water and foams in selected whipping agent;
4), by step 3) gained foam adds step 2) gained alkali slag slurry, stir both to evenly mixing;
5), build maintenance and obtain alkali slag foamed concrete.
In the present embodiment:
Described slag is blast furnace slag, and its specific surface area is 440-460m 2/ kg, density is 2.85-2.95g/cm 3, basicity factor M 0=0.95~1.05, reactivity coefficient M a=0.42~0.48, quality coefficient M k=1.65~1.85;
Described slag is composed of the following components by mass: SiO 2: 30~34 parts; Al 2o 3: 12~16 parts; Fe 2o 3: 0.5~1.0 part; MgO:8~12 part; CaO:34~38 part; Na 2o:0.5~1.0 part; K 2o:0.1~0.5 part; Loss on ignition: 0.5~1.5 part; Other: 0.5~3.0 part.
Embodiment 1,2 gained alkali slag foamed concrete are carried out to performance test, and result is as shown in table 1:
Table 1 embodiment 1,2 gained alkali slag foamed concrete salient featuress
Performance index Apparent density kg/m 3 Ultimate compression strength MPa Thermal conductivity W/ (mk)
Embodiment 1 592 2.88 0.138
Embodiment 2 601 3.48 0.139
Embodiment 3:
The difference of the present embodiment and embodiment 1 is, the selected starting material of the present embodiment are: slag: 62~63 parts; NaOH:5~6 part; Water: 25~26 parts; Whipping agent: 6.3~6.7 parts.
Embodiment 4:
The difference of the present embodiment and embodiment 1 is, the selected starting material of the present embodiment are: slag: 59~60 parts; Water glass: 9~10 parts; Water: 23~24 parts; Whipping agent: 6.5~6.9 parts;
Embodiment 3,4 gained alkali slag foamed concrete are carried out to performance test, and result is as shown in table 2:
Table 2 embodiment 3,4 gained alkali slag foamed concrete salient featuress
Performance index Apparent density kg/m 3 Ultimate compression strength MPa Thermal conductivity W/ (mk)
Embodiment 3 505 1.44 0.112
Embodiment 4 503 2.61 0.111
Embodiment 5:
The difference of the present embodiment and embodiment 1 is, the selected starting material of the present embodiment are: slag: 60~61 parts; NaOH:5~6 part; Water: 24~25 parts; Whipping agent: 8.8~9.2 parts.
Embodiment 6:
The difference of the present embodiment and embodiment 2 is, the selected starting material of the present embodiment are: slag: 57~58 parts; Water glass: 9~10 parts; Water: 21~22 parts; Whipping agent: 9.3~9.7 parts.
Embodiment 5,6 gained alkali slag foamed concrete are carried out to performance test, and result is as shown in table 3:
Table 3 embodiment 5,6 gained alkali slag foamed concrete salient featuress
Performance index Apparent density kg/m 3 Ultimate compression strength MPa Thermal conductivity W/ (mk)
Embodiment 5 385 0.78 0.096
Embodiment 6 404 2.02 0.098
Embodiment 7:
The difference of the present embodiment and embodiment 1 is, the selected starting material of the present embodiment are: slag: 59~60 parts; NaOH:5~6 part; Water: 23~24 parts; Whipping agent: 11.8~12.2 parts.
Embodiment 8:
The difference of the present embodiment and embodiment 2 is, the selected starting material of the present embodiment are: slag: 56~57 parts; Water glass: 9~10 parts; Water: 21~23 parts; Whipping agent: 11.8~12.2 parts.
Embodiment 7,8 gained alkali slag foamed concrete are carried out to performance test, and result is as shown in table 4:
Table 4 embodiment 7,8 gained alkali slag foamed concrete salient featuress
Performance index Apparent density kg/m 3 Ultimate compression strength MPa Thermal conductivity W/ (mk)
Embodiment 7 308 0.67 0.076
Embodiment 8 299 1.06 0.074
As can be seen here, the alkali slag foamed concrete of the present invention thermal effect that coagulates is good, and ultimate compression strength is high, and apparent density is low, has effectively solved the contradiction between apparent density, ultimate compression strength and thermal conductivity.
It should be noted that: in the present invention, apparent density test is measured with reference to GB/T11969 " steam aerated concrete performance test methods ", intensity test is measured with reference to JC/T1062-2007 " foam concrete block ", and thermal conductivity test method is measured with reference to GB/T10294-2008 " the mensuration protective heat plate method of Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics ".
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.

Claims (8)

1. alkali slag foamed concrete, comprises slag and alkali-activator, and described alkali-activator is sodium hydroxide or water glass, it is characterized in that: when alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~65 parts;
NaOH:5~6 part;
Water: 23~26 parts;
Whipping agent: 4.8~12.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 56~61 parts;
Water glass: 9~11 parts;
Water: 21~25 parts;
Whipping agent: 5.0~12.2 parts;
The unit weight of described foamed concrete is 290-610kg/m 3.
2. alkali slag foamed concrete according to claim 1, is characterized in that: described slag is blast furnace slag, its specific surface area is 440-460m 2/ kg, density is 2.85-2.95g/cm 3, basicity factor M 0=0.95~1.05, reactivity coefficient M a=0.42~0.48, quality coefficient M k=1.65~1.85.
3. alkali slag foamed concrete according to claim 1, is characterized in that: described slag is composed of the following components by mass: SiO 2: 30~34 parts; Al 2o 3: 12~16 parts; Fe 2o 3: 0.5~1.0 part; MgO:8~12 part; CaO:34~38 part; Na 2o:0.5~1.0 part; K 2o:0.1~0.5 part; Loss on ignition: 0.5~1.5 part; Other: 0.5~3.0 part.
4. alkali slag foamed concrete according to claim 1, is characterized in that:
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 63~65 parts;
NaOH:5~6 part;
Water: 25~26 parts;
Whipping agent: 4.8~5.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 60~61 parts;
Water glass: 10~11 parts;
Water: 24~25 parts;
Whipping agent: 5.0~5.4 parts;
The unit weight of described foamed concrete is 590~610kg/m 3.
5. alkali slag foamed concrete according to claim 1, is characterized in that:
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 62~63 parts;
NaOH:5~6 part;
Water: 25~26 parts;
Whipping agent: 6.3~6.7 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~60 parts;
Water glass: 9~10 parts;
Water: 23~24 parts;
Whipping agent: 6.5~6.9 parts;
The unit weight of described foamed concrete is 490~510kg/m 3.
6. alkali slag foamed concrete according to claim 1, is characterized in that:
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 60~61 parts;
NaOH:5~6 part;
Water: 24~25 parts;
Whipping agent: 8.8~9.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 57~58 parts;
Water glass: 9~10 parts;
Water: 21~22 parts;
Whipping agent: 9.3~9.7 parts;
The unit weight of described foamed concrete is 390~410kg/m 3.
7. alkali slag foamed concrete according to claim 1, is characterized in that:
When alkali-activator is sodium hydroxide, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 59~60 parts;
NaOH:5~6 part;
Water: 23~24 parts;
Whipping agent: 11.8~12.2 parts;
When alkali-activator is water glass, described alkali slag foamed concrete is composed of the following components by mass:
Slag: 56~57 parts;
Water glass: 9~10 parts;
Water: 21~23 parts;
Whipping agent: 11.8~12.2 parts;
The unit weight of described foamed concrete is 290~310kg/m 3.
8. the method for preparation alkali slag foamed concrete as described in claim 1-7 any one, is characterized in that: comprise the following steps:
1), choose starting material by proportioning;
2), mixing step 1) selected slag and alkali-activator the stirring that adds water;
3), to step 1) processing adds water and foams in selected whipping agent;
4), by step 3) gained foam adds step 2) gained alkali slag slurry, stir both to evenly mixing;
5), build maintenance and obtain alkali slag foamed concrete.
CN201410431394.6A 2014-08-28 2014-08-28 Alkali slag foamed concrete Expired - Fee Related CN104193274B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104817338A (en) * 2015-03-27 2015-08-05 重庆大学 Method for preparing alkali-activated steel slag/mineral slag lightweight foam material
CN105645904A (en) * 2016-03-15 2016-06-08 东南大学 Non-autoclaved aerated concrete prepared by utilizing lithium slag and nickel slag and preparation method of non-autoclaved aerated concrete
CN106396574A (en) * 2016-09-06 2017-02-15 清华大学建筑设计研究院有限公司 Silicon-aluminum based lightweight concrete material and preparation method thereof
CN106927770A (en) * 2017-04-12 2017-07-07 重庆大学 A kind of alkali-activated slag foamed concrete sound-absorbing material and preparation method thereof
CN109748599A (en) * 2019-02-21 2019-05-14 西安理工大学 A kind of lightweight alkali-activated slag thermal insulation material and preparation method thereof
CN110194616A (en) * 2019-06-28 2019-09-03 福州大学 A kind of anti-crack alkalis slag concrete and its preparation
CN111116222A (en) * 2019-12-12 2020-05-08 昆明理工大学 Alkali slag aerated concrete and preparation method thereof
CN111548107A (en) * 2020-05-29 2020-08-18 重庆建工第四建设有限责任公司 Alkali slag concrete construction method
CN112723911A (en) * 2021-01-19 2021-04-30 河北工业大学 Regenerated powder-based inorganic cementing material toughening and crack reducing foaming agent and application thereof

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US5605570A (en) * 1995-07-20 1997-02-25 U.S. Army Corps Of Engineers As Represented By The Secretary Of The Army Alkali-activated glassy silicate foamed concrete
CN102701688A (en) * 2012-06-07 2012-10-03 江苏尼高科技有限公司 Compound foam cement heat preserving material produced by using caustic slag cement and preparation method thereof
CN102731048A (en) * 2012-06-29 2012-10-17 王建国 Alkali activated slag foamed cement product and its preparation method
CN103804012A (en) * 2012-11-14 2014-05-21 神华集团有限责任公司 Fireproof thermal insulation material and preparation method and application thereof

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Publication number Priority date Publication date Assignee Title
JPH08100177A (en) * 1994-08-01 1996-04-16 Yawata Kouro Concrete Kk Construction and building composition for backfilling, etc.
US5605570A (en) * 1995-07-20 1997-02-25 U.S. Army Corps Of Engineers As Represented By The Secretary Of The Army Alkali-activated glassy silicate foamed concrete
CN102701688A (en) * 2012-06-07 2012-10-03 江苏尼高科技有限公司 Compound foam cement heat preserving material produced by using caustic slag cement and preparation method thereof
CN102731048A (en) * 2012-06-29 2012-10-17 王建国 Alkali activated slag foamed cement product and its preparation method
CN103804012A (en) * 2012-11-14 2014-05-21 神华集团有限责任公司 Fireproof thermal insulation material and preparation method and application thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104817338A (en) * 2015-03-27 2015-08-05 重庆大学 Method for preparing alkali-activated steel slag/mineral slag lightweight foam material
CN104817338B (en) * 2015-03-27 2017-04-26 重庆大学 Method for preparing alkali-activated steel slag/mineral slag lightweight foam material
CN105645904A (en) * 2016-03-15 2016-06-08 东南大学 Non-autoclaved aerated concrete prepared by utilizing lithium slag and nickel slag and preparation method of non-autoclaved aerated concrete
CN106396574A (en) * 2016-09-06 2017-02-15 清华大学建筑设计研究院有限公司 Silicon-aluminum based lightweight concrete material and preparation method thereof
CN106927770A (en) * 2017-04-12 2017-07-07 重庆大学 A kind of alkali-activated slag foamed concrete sound-absorbing material and preparation method thereof
CN106927770B (en) * 2017-04-12 2019-11-12 重庆大学 A kind of alkali-activated slag foamed concrete sound-absorbing material and preparation method thereof
CN109748599A (en) * 2019-02-21 2019-05-14 西安理工大学 A kind of lightweight alkali-activated slag thermal insulation material and preparation method thereof
CN109748599B (en) * 2019-02-21 2021-10-22 西安理工大学 Light alkali slag heat-insulating material and preparation method thereof
CN110194616A (en) * 2019-06-28 2019-09-03 福州大学 A kind of anti-crack alkalis slag concrete and its preparation
CN111116222A (en) * 2019-12-12 2020-05-08 昆明理工大学 Alkali slag aerated concrete and preparation method thereof
CN111548107A (en) * 2020-05-29 2020-08-18 重庆建工第四建设有限责任公司 Alkali slag concrete construction method
CN112723911A (en) * 2021-01-19 2021-04-30 河北工业大学 Regenerated powder-based inorganic cementing material toughening and crack reducing foaming agent and application thereof
CN112723911B (en) * 2021-01-19 2021-07-27 河北工业大学 Regenerated powder-based inorganic cementing material toughening and crack reducing foaming agent and application thereof

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