CN102659336A - Modified limestone powder-based mineral admixture and preparation method thereof - Google Patents
Modified limestone powder-based mineral admixture and preparation method thereof Download PDFInfo
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- CN102659336A CN102659336A CN2012101147184A CN201210114718A CN102659336A CN 102659336 A CN102659336 A CN 102659336A CN 2012101147184 A CN2012101147184 A CN 2012101147184A CN 201210114718 A CN201210114718 A CN 201210114718A CN 102659336 A CN102659336 A CN 102659336A
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- mineral admixture
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- lime stone
- stone flour
- limestone powder
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- 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
Abstract
The invention discloses a modified limestone powder-based mineral admixture and a preparation method thereof. The modified limestone powder-based mineral admixture includes, by weight, from 50 to 70 parts of limestone powder, from 30 to 50 parts of mineral waste residue powder, from 3 to 5 parts of calcined gypsum and from 0.01 to 0.03 part of triethanolamine which are used for preparing the modified limestone powder-based mineral admixture by means of stirring and mixing. The modified limestone powder-based mineral admixture has high activity, the strength and the durability of cement concrete can be obviously increased, the mixing amount of the limestone powder in the cement concrete can be increased, cost is reduced, and the modified limestone powder-based mineral admixture has remarkable economic and social benefits.
Description
Technical field
The present invention relates to a kind of mineral admixture, be specifically related to a kind of modified lime stone flour base mineral admixture, the invention still further relates to the preparation method of this modified lime stone flour base mineral admixture.
Background technology
Wingdale is a kind of mainly by calcite (CaCO
3) mineral formed, its natural resource are abundant, distribute extensively, obtain easily.As cement producting material and concrete thick, fine aggregate; In the process of exploiting Wingdale and production mechanism sand, stone, inevitably produced a large amount of limestone powders; If it discarded will be formed huge environmental pollution, increase carrying capacity of environment, land occupation.Therefore, reduce cement consumption, reach and improve concrete mix performance and intensity if can utilize limestone powder to make adulterant; Improve durability of concrete; It is rare and not enough that this can not only remedy existing adulterant, can also reduce production costs, and reduces exhaust gas emission; Alleviate carrying capacity of environment, recycling economy is produced active influence.China is that manufacture of cement and concrete are used big country, and large-scale infrastructure construction is continuing to carry out, and makes limestone powder obtain scientific and rational utilization, and producing good technical, economy and ecological benefits simultaneously is that realistic meaning is arranged very much.
Limestone powder can improve the many performances of cement concrete, can reduce the bleeding and the segregation phenomenon of fresh concrete, and yielding stress and viscosity are reduced, and can improve the velocity of flow of self-compacting concrete SCC mixture, improves the rheological property of fresh concrete; Limestone powder can reduce concrete contraction at volume greater than 10% o'clock, increased concrete shrinkage with volume and reduced; Limestone powder can promote cement, especially C
3The early hydration speed of S, and and C
3The A reaction generates new product carbon calcium aluminate hydrated product, has improved early stage (1～7 day) intensity of cement concrete and mortar, but has compared with flyash, breeze, because it does not have pozzolanic activity to add diluting effect, it is slow that they increase late strength of concrete.Many researchs show, the limestone powder of certain fineness can improve the early strength of cement stone when its volume is in 10%, along with volume continues to increase, then can obviously reduce strength of cement.Therefore, the volume of limestone powder in cement concrete is difficult to improve, and limited its widespread use, late strength of concrete increased restricted the application of limestone powder in cement concrete slowly more.The present invention is intended to overcome the deficiency of existing limestone powder adulterant technology, and limestone powder is carried out modification, makes the limestone powder base mineral admixture after the modification have high reactivity and weather resistance, increases the volume in concrete, reduces the concrete cost.
Summary of the invention
First technical problem to be solved by this invention provides a kind of modified lime stone flour base mineral admixture that can improve intensity and weather resistance simultaneously.
Second technical problem to be solved by this invention provides the preparation method of this modified lime stone flour base mineral admixture.
In order to solve above-mentioned first technical problem; Modified lime stone flour base mineral admixture provided by the invention; Be mixed and made into by limestone powder, slag powders, calcined gypsum and trolamine raw material stirring; The shared weight fraction of each starting material is: 50～70 parts of limestone powders, 30～50 parts of slag powders, 3～5 parts of calcined gypsums, 0.01～0.03 part of trolamine.
Described limestone powder is that the fines that production mechanism sand is produced is 300～400m through grinding to Blain specific surface
2The dry powder of/kg.
Described slag powders is the melting slag of discharging when smelting the pig iron, and the Blain specific surface that behind grinding, obtains is 400～500m
2/ kg, 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder.
Calcining forms described calcined gypsum through 750 ℃～850 ℃ temperature by gypsum, through grinding to Blain specific surface greater than 400m
2/ kg, CaSO
4Content is greater than 85% dry powder.
In order to solve above-mentioned second technical problem; The method for preparing modified lime stone flour base mineral admixture provided by the invention; According to weight ratio with 50～70 parts of limestone powders, 30～50 parts of slag powders, calcined gypsum carries out mechanical stirring for 3～5 parts and mixes; Add 0.01～0.03 part of trolamine when mixing, mix and promptly obtain modified lime stone flour base mineral admixture.
Modified lime stone flour base mineral admixture provided by the invention utilizes limestone powder adulterant compared with techniques with existing, has following advantage:
1), can improve concrete morning, later strength
Limestone powder has promoted the cement early hydration, and and C
3The A reaction generates new product carbon calcium aluminate hydrated product, has improved early age strength of concrete, and simultaneously, also development has produced favourable effect to trolamine to early age strength of concrete; The calcium hydroxide that hydrated cementitious produces and the gypsum of admixture play excitation to slag powders; Accelerated the hydration reaction speed of slag powders; Make it mainly in 7～28 day length of time, participate in hydration reaction, the continuous aquation of cement clinker in addition, guaranteed during this in the strength development of cement stone.Admixture modified lime stone flour base mineral admixture can guarantee that prepared concrete possesses good early stage and later strength simultaneously.
2), improved concrete weather resistance
Limestone powder and breeze are mixed again and can be effectively reduced the pore fluid of concrete rate; Make the pore structure refinement; Improved pore structure, can effectively reduce concrete chloride diffusion coefficient, trolamine makes the hydrated cementitious product structure fine and close simultaneously; Therefore, this mineral admixture can significantly improve concrete impermeability; Limestone powder and breeze are mixed again can also the good restraining concrete shrinkage deformation, reduces concrete cracking; The mineral admixture that admixture is a large amount of has reduced cement consumption, has effectively reduced concrete hydration heat, reduces the thermal cracking that produces because of thermal stress.
3), preparation technology is simple, with low cost, is suitable for large-scale industrial production.
In sum, the present invention is a kind of modified lime stone flour base mineral admixture that can improve intensity and weather resistance simultaneously, its preparation method simple possible.
Embodiment
For a better understanding of the present invention, further illustrate content of the present invention, but content of the present invention not only is confined to following embodiment below in conjunction with embodiment.
Embodiment 1:
The employing Blain specific surface is 350m
250 parts of the limestone powders of/kg, Blain specific surface are 400m
250 parts of the slag powders of/kg, Blain specific surface 450m
24 parts and 0.02 part trolamine of the calcined gypsum of/kg carries out mechanical stirring; Process modified lime stone flour base mineral admixture after mixing; Wherein: slag powders is the melting slag of discharging when smelting the pig iron, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder; Calcined gypsum is calcined through 850 temperature by gypsum and is formed CaSO
4Content is greater than 85% dry powder.
Use this mineral admixture concrete batching, cooperate when performance to see shown in table 1 and the table 2.
Wherein used starting material are: cement adopts 42.5 ordinary Portland cements, and sand is the river sand of fineness modulus 2.6, and stone is the rubble of 5～25mm continuous grading, and water reducer is the polycarboxylate water-reducer of solid content 15%, and hydromining is used tap water.
Table 1 concrete mix
Table 2 concrete strength and anti-permeability performance
Embodiment 2:
The employing Blain specific surface is 350m
260 parts of the limestone powders of/kg, Blain specific surface are 400m
240 parts of the slag powders of/kg, Blain specific surface 450m
24 parts and 0.03 part trolamine of the calcined gypsum of/kg carries out mechanical stirring; Process modified lime stone flour base mineral admixture after mixing; Wherein: slag powders is the melting slag of discharging when smelting the pig iron, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder; Calcined gypsum is calcined through 780 temperature by gypsum and is formed CaSO
4Content is greater than 85% dry powder.
Embodiment 3:
The employing Blain specific surface is 350m
270 parts of the limestone powders of/kg, Blain specific surface are 400m
230 parts of the slag powders of/kg, Blain specific surface 450m
25 parts and 0.03 part trolamine of the calcined gypsum of/kg carries out mechanical stirring; Process modified lime stone flour base mineral admixture after mixing; Wherein: slag powders is the melting slag of discharging when smelting the pig iron, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder; Calcined gypsum is calcined through 750 temperature by gypsum and is formed CaSO
4Content is greater than 85% dry powder.
Embodiment 4:
The employing Blain specific surface is 300m
255 parts of the limestone powders of/kg, Blain specific surface are 500m
245 parts of the slag powders of/kg, specific surface area 400m
23 parts and 0.01 part trolamine of the calcined gypsum of/kg carries out mechanical stirring; Process modified lime stone flour base mineral admixture after mixing; Wherein: slag powders is the melting slag of discharging when smelting the pig iron, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder; Calcined gypsum is calcined through 800 temperature by gypsum and is formed CaSO
4Content is greater than 85% dry powder.
Embodiment 5:
The employing Blain specific surface is 400m
265 parts of the limestone powders of/kg, Blain specific surface are 450m
235 parts of the slag powders of/kg, specific surface area 450m
25 parts and 0.03 part trolamine of the calcined gypsum of/kg carries out mechanical stirring; Process modified lime stone flour base mineral admixture after mixing; Wherein: slag powders is the melting slag of discharging when smelting the pig iron, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder; Calcined gypsum is calcined through 850 temperature by gypsum and is formed CaSO
4Content is greater than 85% dry powder.
Claims (5)
1. modified lime stone flour base mineral admixture; It is characterized in that: be mixed and made into by limestone powder, breeze, calcined gypsum and trolamine raw material stirring; The shared weight fraction of each starting material is: 50～70 parts of limestone powders; 30～50 parts of slag powders, 3～5 parts of calcined gypsums, 0.01～0.03 part of trolamine.
2. modified lime stone flour base mineral admixture according to claim 1 is characterized in that: described limestone powder is that the fines that production mechanism sand is produced is 300～400m through grinding to Blain specific surface
2The dry powder of/kg.
3. modified lime stone flour base mineral admixture according to claim 1 is characterized in that: described slag powders is the melting slag of discharging when smelting the pig iron, and the Blain specific surface that behind grinding, obtains is 400～500m
2/ kg, 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95% dry powder.
4. modified lime stone flour base mineral admixture according to claim 1 is characterized in that: described calcined gypsum is that calcining forms through 750 ℃～850 ℃ temperature by gypsum, through grinding to Blain specific surface greater than 400m
2/ k g, CaSO
4Content is greater than 85% dry powder.
5. the method for preparing the described modified lime stone flour of claim 1 base mineral admixture; It is characterized in that: according to weight ratio with 50～70 parts of limestone powders; 30～50 parts of slag powders; Calcined gypsum carries out mechanical stirring for 3～5 parts to be mixed, and adds 0.01～0.03 part of trolamine when mixing, and mixes and promptly obtains modified lime stone flour base mineral admixture.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342491A (en) * | 2013-07-10 | 2013-10-09 | 武汉理工大学 | Iron tailing-based complex mineral admixture and preparation process thereof |
| CN104211991A (en) * | 2014-08-21 | 2014-12-17 | 安徽吉安特种线缆制造有限公司 | Improved limestone for insect-preventing and ant-preventing electric wire and cable material and preparation method of limestone |
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN106966626A (en) * | 2017-04-26 | 2017-07-21 | 西安建筑科技大学 | It is a kind of to be used to improve the additive for mixing agstone activity in cement concrete |
| CN107382277A (en) * | 2017-08-16 | 2017-11-24 | 江西省建筑材料工业科学研究设计院 | A kind of superfine composite modified agstone of concrete microdilatancy |
| CN107572853A (en) * | 2017-10-25 | 2018-01-12 | 安徽中铁工程材料科技有限公司 | A kind of agstone slag powders composite blend and preparation method thereof |
| CN110041007A (en) * | 2019-03-11 | 2019-07-23 | 武汉理工大学 | A kind of impervious marble powder composite blend and its application |
| CN110845168A (en) * | 2019-12-10 | 2020-02-28 | 徐州中联混凝土有限公司 | Active admixture, preparation method and application of active admixture and concrete |
| CN111995271A (en) * | 2020-08-25 | 2020-11-27 | 湖州市菱湖三狮水泥有限公司 | High-volume fly ash cement and preparation method thereof |
| CN112341031A (en) * | 2020-11-12 | 2021-02-09 | 中建西部建设西南有限公司 | Modified limestone powder mineral admixture and preparation method thereof |
| CN112851187A (en) * | 2021-01-28 | 2021-05-28 | 科之杰新材料集团有限公司 | Enhanced concrete admixture and preparation method thereof |
| CN113831044A (en) * | 2021-10-19 | 2021-12-24 | 湖北碞石科技有限公司 | Mineral admixture for concrete |
| CN115677312A (en) * | 2022-11-30 | 2023-02-03 | 南通市建设混凝土有限公司 | Special concrete mix proportion design method with multi-objective control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121579A (en) * | 2007-07-12 | 2008-02-13 | 北京科技大学 | Method for producing concrete active admixture by iron tailings |
| CN102180612A (en) * | 2011-01-20 | 2011-09-14 | 葫芦岛市辽西混凝土外加剂有限公司 | Composite admixture for cement or high-performance concrete and preparation method thereof |
-
2012
- 2012-04-18 CN CN2012101147184A patent/CN102659336A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121579A (en) * | 2007-07-12 | 2008-02-13 | 北京科技大学 | Method for producing concrete active admixture by iron tailings |
| CN102180612A (en) * | 2011-01-20 | 2011-09-14 | 葫芦岛市辽西混凝土外加剂有限公司 | Composite admixture for cement or high-performance concrete and preparation method thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342491A (en) * | 2013-07-10 | 2013-10-09 | 武汉理工大学 | Iron tailing-based complex mineral admixture and preparation process thereof |
| CN103342491B (en) * | 2013-07-10 | 2015-09-30 | 武汉理工大学 | Iron tailings based composite mineral blending material and preparation technology thereof |
| CN104211991A (en) * | 2014-08-21 | 2014-12-17 | 安徽吉安特种线缆制造有限公司 | Improved limestone for insect-preventing and ant-preventing electric wire and cable material and preparation method of limestone |
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN106966626A (en) * | 2017-04-26 | 2017-07-21 | 西安建筑科技大学 | It is a kind of to be used to improve the additive for mixing agstone activity in cement concrete |
| CN107382277A (en) * | 2017-08-16 | 2017-11-24 | 江西省建筑材料工业科学研究设计院 | A kind of superfine composite modified agstone of concrete microdilatancy |
| CN107572853A (en) * | 2017-10-25 | 2018-01-12 | 安徽中铁工程材料科技有限公司 | A kind of agstone slag powders composite blend and preparation method thereof |
| CN110041007A (en) * | 2019-03-11 | 2019-07-23 | 武汉理工大学 | A kind of impervious marble powder composite blend and its application |
| CN110845168A (en) * | 2019-12-10 | 2020-02-28 | 徐州中联混凝土有限公司 | Active admixture, preparation method and application of active admixture and concrete |
| CN111995271A (en) * | 2020-08-25 | 2020-11-27 | 湖州市菱湖三狮水泥有限公司 | High-volume fly ash cement and preparation method thereof |
| CN112341031A (en) * | 2020-11-12 | 2021-02-09 | 中建西部建设西南有限公司 | Modified limestone powder mineral admixture and preparation method thereof |
| CN112851187A (en) * | 2021-01-28 | 2021-05-28 | 科之杰新材料集团有限公司 | Enhanced concrete admixture and preparation method thereof |
| CN113831044A (en) * | 2021-10-19 | 2021-12-24 | 湖北碞石科技有限公司 | Mineral admixture for concrete |
| CN115677312A (en) * | 2022-11-30 | 2023-02-03 | 南通市建设混凝土有限公司 | Special concrete mix proportion design method with multi-objective control |
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Application publication date: 20120912 |