CN100369851C - Calcium enriched high strength concrete admixture and its preparation method and use method - Google Patents
Calcium enriched high strength concrete admixture and its preparation method and use method Download PDFInfo
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- CN100369851C CN100369851C CNB2006102007852A CN200610200785A CN100369851C CN 100369851 C CN100369851 C CN 100369851C CN B2006102007852 A CNB2006102007852 A CN B2006102007852A CN 200610200785 A CN200610200785 A CN 200610200785A CN 100369851 C CN100369851 C CN 100369851C
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- flyash
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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
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Abstract
The present invention relates to a calcium-increased type high-strength concrete blending material, its preparation method and application method. Said concrete blending material includes 70-90% of fly ash, 5-20% of tap cinder, 1-5% of calcium hydroxide, 0.5-3% of sodium sulfate, 0.1-0.5% of silane coupling agent, 0.01-1% of triethanolamine and 0.1-1% of water reducer. Said invention also provides the concrete steps of its preparation method and application method.
Description
Technical field
The present invention relates to a kind of concrete building material and production technique thereof and using method, particularly a kind of is concrete admixture and the production technique and the using method of main raw material with flyash.
Background technology
It is a kind of conventional practice in the building operation that ordinary fly ash joins in the fresh concrete as adulterant, but because quality of fly ash is uneven, performance difference is huge, though some can improve mechanical properties of concrete and endurance quality, but the overwhelming majority is because of the flyash activity deficiency, volume generally is no more than 15% of cement consumption, and after adding, early age strength of concrete is reduced.In concrete construction, for reaching design requirements and improving concrete performance, usually add multiple adulterant and admixture, pulverulent materials such as flyash take place excessively to assemble, bond together after adding water, reduced contact area with water and exciting agent, because it is various to add material category, unstable properties, each department, the raw-material physics of each batch, chemical property difference, various starting material must be determined the construction proportioning through test of many times before each the use, comprehensive cost is higher, and preparation and construction are complicated.According to the development of construction market, be badly in need of developing that multiple performance is determined, commercial concrete admixture.
Summary of the invention
The purpose of this invention is to provide a kind of calcium enriched high strength concrete admixture and preparation method thereof and using method, it is active not enough to solve the conventional concrete adulterant, and volume is low excessively, the problem that early age strength of concrete is reduced; And solve concrete performance instability, frequent test that construction now joins the concrete admixture indefinite form, allots, cost is higher, proportioning is unreasonable, complicated problems is used in construction.
The technical scheme of calcium enriched high strength concrete admixture of the present invention: this calcium enriched high strength concrete admixture is a main raw material with flyash, it is characterized in that: calculate by 100 parts of quality proportionings, following component is arranged:
A, flyash 70-90%;
B, blast-furnace slag 5-20%;
C, calcium hydroxide 1-5%;
D, sodium sulfate 0.5-3%;
E, silane coupling agent 0.1-0.5%;
F, trolamine 0.01-1%;
G, water reducer 0.1-1%.
Above-mentioned flyash is the flyash of calcium content 8-12%.
Above-mentioned water reducer is naphthalene series high-efficiency water-reducing agent UNF5.
The preparation method of above-mentioned calcium enriched high strength concrete admixture is characterized in that step is:
(1), with the oven dry of flyash and blast-furnace slag, moisture controlled is below 1.5%;
(2), 2% of flyash total amount is mixed with silane coupling agent stirring, oven dry, grind standby;
(3), press 1% of flyash total amount mix stirring, oven dry with trolamine, grind standby;
(4), press proportion speed and calculate flyash, calcium hydroxide, sodium sulfate and water reducer, above-mentioned materials is sent into and is stirred levigately in the ball mill through promoting e Foerderanlage, ball milling discharging fineness is that the 0.08mm square hole sieve tails over less than 10%;
(5), be connected sealing from the ball mill discharge port and carry the material receiving port device, from material receiving port connect packaging vessel, measure, seal, the finished product warehouse-in.
The using method of above-mentioned calcium enriched high strength concrete admixture is characterized in that: with the cement consumption 15-35% in the above-mentioned calcium enriched high strength concrete admixture replacement concrete, the water consumption in the concrete reduces 7-10%.
Beneficial effect: the present invention can improve concrete strength, saves cement, improves pumpability, it is dry and cracked to suppress contraction, improves concrete weather resistance, excites series products to compare with other flyash, its outstanding feature is: it is big to replace cement amount in concrete, and early strength improves a lot.
The calcium high strength concrete admixture that increases of the present invention is a main raw material with the flyash of calcium content 8-12%, doping quantity of fly ash accounts for the 70-90% of total mass, turn waste into wealth, effectively utilize solid slag, be used for fresh concrete, the cement amount that substitutes in the concrete is more, improves concrete durability, big volume blending concrete early strength is improved a lot, and have the high characteristics of volume.
The present invention adopts calcium hydroxide, silane coupling agent, sodium sulfate, trolamine as the exciting agent that excites flyash activity, silane coupling agent has improved the wettability of glass microballon in the flyash, improve the bead surface structure simultaneously, improved reactive behavior, make the flyash can fast hydration.Trolamine and sodium sulfate have been accelerated the hydration process of cement, and the activity excitation of the aquation of cement and flyash is to be mutually related, calcium hydroxide that hydrated cementitious generates and the vitriol generation effect in the exciting agent, excited the activity of flyash, quickening C-S-H gel and ettringite crystalline forms, improve C-S-H gel and ettringite crystalline overall quantity, accelerated the reaction of cement clinker again.
The present invention suitably adds some naphthalene series high-efficiency water-reducing agents, can reduce concrete mixing water consumption, improves the material particles dispersity in the concrete, increases the material reaction surface-area, improves speed of response, and is more favourable to the activity that excites flyash.Prevent to assemble, bond together after pulverulent material such as flyash from adding water, increase the contact area of dry material and water and exciting agent.
Behind the high-calcium fly ass and blast-furnace slag drying that the present invention adopts, control moisture is of value to the activity that strengthens gelling material less than 1.5%, accelerates the hydration process of flyash, and concrete strength is being attained full development in early days.In advance 2% of flyash total amount is mixed stirring, oven dry, grinding with silane coupling agent standby, press 1% of flyash total amount mix stirring, oven dry with trolamine, grind standby, help the abundant dispersion of material, the adding dry material that has solved liquid preparation produces and coheres, influences the surface-area of dry material and the problem of performance.
Calcium enriched high strength concrete admixture of the present invention is through levigate, and fineness 0.08mm square hole sieve tails over less than 10%, can reduce concrete mixing water, improves concrete intensity.This adulterant alternate cement amount in concrete can reach more than the 15-35%, can save cement consumption 60-140kg for every cubic metre, early strength can improve 10%, and does not reduce late strength of concrete, suppress the concrete shrinkage cracking, improve concrete frost resistance, impermeability.
Starting material of the present invention are industrial residue, and raw material is easy to get, and turn waste into wealth, and reduce the pollution of solid industrial residue to environment.Compound direct filling and sealing packing after levigate has been improved workman's operating environment greatly.Realize innoxious production, transportation, use, avoid damaging HUMAN HEALTH.Finished product packs and places dry shady and cool place, can preserve 12 months, is fit to commercialized supply.Production and transport of the present invention, use whole process environmentally safe, harmless to the person.
Because flyash is material of construction the most cheap and easy to get, lower than the price of lime, reduce construction costs thereby use calcium enriched concrete admixture also can reduce cement consumption.
Reasonable ratio of the present invention, raw material types is less, saves cement, and cost is lower, and production technique is simple, and is easy to use, and concrete mixing is built no particular requirement, can not cause the problem of steel bar corrosion.
Calcium enriched high strength concrete admixture of the present invention, after stirring in the ratio adding concrete mix on request, the concrete mix workability is good, improves the Concrete Construction performance, reduces concrete slump-loss, improves concrete pumpability.Concrete mix is built the back concrete structure, member can suppress the concrete shrinkage cracking, does not reduce early age strength of concrete, improves later strength, frost resistance, impermeability, and comprehensive cost is low.Be applicable to industry and covil construction, high-strength concrete, pump concrete and normal concrete are suitable for complexity and intensity, performance, the high concrete of life requirement.
Embodiment
The add-on that the present invention increases flyash in the per 100 parts of quality proportionings of calcium high strength concrete admixture can be selected any numerical value between the 70-90%, the add-on of blast-furnace slag can be selected any numerical value of 5-20%, the calcium content 8-12% of above-mentioned flyash, flyash and blast-furnace slag drying moisture are less than 1.5%; The add-on of calcium hydroxide can be selected any numerical value between the 1-5%; The add-on of sodium sulfate is any number between the 0.5-3.0%; The add-on of silane coupling agent (KH-550) can be selected any number between the 0.05-0.2%; The add-on of trolamine can be selected any number between the 0.01-1.00%; The add-on of naphthalene series high-efficiency water-reducing agent (UNF5) can be selected any number between the 0.0-1.0%.The product that above-mentioned silane coupling agent (KH-550), trolamine and naphthalene series high-efficiency water-reducing agent (UNF5) can select for use Danyang City morning twilight coupling agent company to produce.Sodium sulfate can be selected pure product or Sodium sulfate anhydrous.min(99).
Increase the preferred embodiment of calcium high strength concrete admixture:
A, flyash 86%;
B, blast-furnace slag 10%;
C, calcium hydroxide 2%;
D, sodium sulfate 1.5%;
E, silane coupling agent (KH-550) 0.2%;
F, trolamine 0.05%;
G, naphthalene series high-efficiency water-reducing agent (UNF5) 0.25%.
The present invention increases the preferred preparation method of calcium high strength concrete admixture;
(1), with the oven dry of flyash and blast-furnace slag, to water content below 1.5%;
(2), 2% of flyash total amount is mixed with silane coupling agent stirring, oven dry, grind standby.
(3), press 1% of flyash total amount mix stirring, oven dry with trolamine, grind standby.
(4), press proportion speed metering, be promoted in the ball mill levigately in flyash, exciting agent, water reducer, the lifting gear of packing into, ball milling time, discharging fineness are controlled at the 0.08mm square hole sieve and tail over below 10%.
(5), pack by sealing e Foerderanlage material receiving port that packing bag (bucket) is measured, sealed, finished product is put in storage into.
The present invention increases the using method of calcium high strength concrete admixture: replace cement 15-35% at the concrete moderate, play diminishing 7-10% in concrete, joining definite through examination with the compound use of other admixture.
Calcium enriched high strength concrete admixture of the present invention is with the compound use of other admixture the time, and proportioning must be definite through testing.The present invention increases calcium high strength concrete admixture adding mix proportion and detects examples of properties and see the following form:
| Test specimen | Cement Kg/m 3 | Adulterant Kg/m 3 | Sand Kg/m 3 | Stone Kg/m 3 | Water Kg/m 3 | Slump mm | Ultimate compression strength (MPa) | |
| 7d | 28d | |||||||
| Blank concrete | 400 | 0 | 662 | 1178 | 150 | 155 | 35.1 | 50.9 |
| The contrast concrete | 320 300 280 260 | 80 100 120 140 | 658 652 652 650 | 1178 1178 1178 1178 | 140 139 138 139 | 155 130 140 160 | 35.4 34.5 32.4 35.0 | 52.3 51.4 51.9 49.2 |
Above-mentioned cement is wing east, P.O 42.5 Jilin cement, and current specifications is pressed in concrete construction, standard gets final product, and does not have other requirement.
Claims (5)
1. a calcium enriched high strength concrete admixture is a main raw material with flyash, it is characterized in that: calculate by mass percentage, following component is arranged:
A, flyash 70-90%;
B, blast-furnace slag 5-20%;
C, calcium hydroxide 1-5%;
D, sodium sulfate 0.5-3%;
E, silane coupling agent 0.1-0.5%;
F, trolamine 0.01-1%;
G, water reducer 0.1-1%.
2. calcium enriched high strength concrete admixture according to claim 1 is characterized in that: above-mentioned flyash is the flyash of calcium content 8-12%.
3. calcium enriched high strength concrete admixture according to claim 1 is characterized in that: above-mentioned water reducer is naphthalene series high-efficiency water-reducing agent UNF5.
4. the preparation method of the described calcium enriched high strength concrete admixture of claim 1 is characterized in that step is:
(1), with the oven dry of flyash and blast-furnace slag, moisture controlled is below 1.5%;
(2), 2% of flyash total amount is mixed with silane coupling agent stirring, oven dry, grind standby;
(3), press 1% of flyash total amount mix stirring, oven dry with trolamine, grind standby;
(4), press proportion speed and calculate flyash, calcium hydroxide, sodium sulfate and water reducer, above-mentioned materials is sent into and is stirred levigately in the ball mill through promoting e Foerderanlage, ball milling discharging fineness is that the 0.08mm square hole sieve tails over less than 10%;
(5), be connected sealing from the ball mill discharge port and carry the material receiving port device, from material receiving port connect packaging vessel, measure, seal, the finished product warehouse-in.
5. the using method of the described calcium enriched high strength concrete admixture of claim 1 is characterized in that: above-mentioned calcium enriched high strength concrete admixture is replaced cement consumption 15-35% in the concrete, and the water consumption in the concrete reduces 7-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006102007852A CN100369851C (en) | 2006-08-09 | 2006-08-09 | Calcium enriched high strength concrete admixture and its preparation method and use method |
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| CNB2006102007852A CN100369851C (en) | 2006-08-09 | 2006-08-09 | Calcium enriched high strength concrete admixture and its preparation method and use method |
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| CN1903773A CN1903773A (en) | 2007-01-31 |
| CN100369851C true CN100369851C (en) | 2008-02-20 |
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| CNB2006102007852A Expired - Fee Related CN100369851C (en) | 2006-08-09 | 2006-08-09 | Calcium enriched high strength concrete admixture and its preparation method and use method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659532B (en) * | 2009-09-18 | 2012-11-07 | 武汉理工大学 | Composite modifying agent of road fly ash and preparation method thereof |
| CN102775085A (en) * | 2012-08-13 | 2012-11-14 | 厦门益材粉煤灰有限责任公司 | Fly ash compounding product and preparation method thereof |
| CN105347713A (en) * | 2015-11-12 | 2016-02-24 | 江门市中建科技开发有限公司 | Cement concrete micro-expansion anti-cracking mineral admixture and preparation method thereof |
| CN108341618A (en) * | 2018-02-05 | 2018-07-31 | 无锡金木土科技有限公司 | A kind of non-steamed reactive powder concrete admixture and production method |
| CN109053065A (en) * | 2018-07-13 | 2018-12-21 | 中建西部建设贵州有限公司 | A kind of flyash mixed mixing and preparation method thereof |
| CN109704611B (en) * | 2018-09-14 | 2021-10-19 | 石家庄铁道大学 | Large-dosage low-calcium fly ash early-stage activity excitant |
| CN110041002B (en) * | 2019-04-23 | 2021-09-03 | 石家庄市长安育才建材有限公司 | Ground rice hull ash-based composite admixture and application thereof |
| CN112194419B (en) * | 2020-12-03 | 2021-06-04 | 广东博智林机器人有限公司 | Alkali-activated self-compacting concrete and preparation method thereof |
| CN113772987B (en) * | 2021-08-25 | 2023-01-06 | 陕西正元粉煤灰综合利用有限公司 | Modification method of fly ash and prepared modified fly ash |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154952A (en) * | 1996-01-15 | 1997-07-23 | 王永逵 | High-performance concrete special-use auxiliary material |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154952A (en) * | 1996-01-15 | 1997-07-23 | 王永逵 | High-performance concrete special-use auxiliary material |
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Granted publication date: 20080220 Termination date: 20130809 |