CN106186901A - A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities - Google Patents
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities Download PDFInfo
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- CN106186901A CN106186901A CN201610493569.5A CN201610493569A CN106186901A CN 106186901 A CN106186901 A CN 106186901A CN 201610493569 A CN201610493569 A CN 201610493569A CN 106186901 A CN106186901 A CN 106186901A
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- tuff
- powder
- high altitude
- coagulation soil
- altitude localities
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Classifications
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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
- 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
- C04B28/04—Portland cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention provides a kind of tuff-powder grinding coagulation soil being applicable to high altitude localities.Described grinding coagulation soil is made up of Binder Materials, sandstone aggregate, water, water reducer and air entraining agent, and wherein said Binder Materials is made up of cement and tuff-powder, or is made up of the mixed powder of cement and tuff-powder with I level flyash, and addition is 190kg/m3～230kg/m3；The addition of described sandstone aggregate is 2100kg/m3～2200kg/m3；The addition of described water is 80kg/m3～95kg/m3, water and Binder Materials mass ratio are not more than 0.45.The present invention uses tuff-powder as concrete mineral admixture, by mix-design, preparation high altitude localities tuff-powder grinding coagulation soil, reaches C9020F150W8 technical specification, it is ensured that high altitude localities durability of roll compacted concrete.
Description
Technical field
The present invention relates to technical field of concrete, roll mixed particularly to a kind of tuff-powder being applicable to high altitude localities
Solidifying soil.
Background technology
The most ripe about the grinding concrete dam technology of height above sea level less than 2000 meters, but more than 3000m's
High altitude localities, does not has the case that 100m level high roller compacted concrete dam builds up so far.High altitude localities Main Climatic feature is gas
Force down, radiate strong, severe cold is dried, temperature difference per day is big, Windy Days is frequent, difficulty of building a dam is bigger.
Mineral admixture is one of component indispensable in modern grinding coagulation soil, such as flyash, slag powders, limestone
Powder etc., can reduce cement consumption, improve concrete performance, reduce engineering cost.But, high altitude localities, Tibet lacks fine coal
The high-quality tradition admixture resources such as ash, slag powders, in the face of substantial amounts of engineering demand, can only pass through long-distance transportation, both increase work
Journey cost, is affected by environment and traffic condition again and be can not get effective guarantee, and then may affect engineering construction.
Some areas, Tibet tufa stone rich in mineral resources, the tuff-powder of grinding itself has pozzolanic activity,
Belong to natural volcanic ash material.Therefore, if by the control indexes of tuff-powder mineral admixture, grinding in conjunction with tuff-powder
The work such as the mixtures optimal design of pressure concrete, prepare a kind of tuff-powder grinding coagulation soil being applicable to high altitude localities, both protected
The construction quality of card concrete, can solve again the local difficult problem lacking mineral admixture, save engineering cost, accelerates engineering and enters
Degree, promotes the development of high altitude localities grinding concrete dam technology.
Summary of the invention
It is an object of the invention to provide one to be applicable to high altitude localities, gather materials on the spot, meet engine request, the most resistance to
For a long time, tuff-powder is native as the grinding coagulation of essential mineral admixture.
The technical scheme that the present invention provides: described a kind of tuff-powder grinding coagulation soil being applicable to high altitude localities, its
It is characterised by that described grinding coagulation soil is made up of Binder Materials, sandstone aggregate, water, water reducer and air entraining agent, described concrete
Physical index be: air content is between 3.5%～5.5%, and VC value is between 2.0s～6.0s, and apparent density is 2400kg/
m3～2500kg/m3；Wherein in every square metre of concrete, each component addition is as follows:
The addition of described Binder Materials is 190kg/m3～230kg/m3；And Binder Materials is the water by 60%～95%
Mud and the tuff-powder composition of 5%～40%, or cement, 10%～60% tuff-powder and the I level fine coal by 40%～90%
Ash forms according to the mixed mixed powder of the ratio of mass ratio 1:1；
The addition of described sandstone aggregate is 2100kg/m3～2200kg/m3；And the sand coarse aggregate ratio in sandstone aggregate be 31～
33%, described stone is to be by mass ratio: 30～the great Shi of 40%, and in 30～40%, stone and 30～40% forms；
The addition of described water is 80kg/m3～95kg/m3, water and Binder Materials mass ratio are not more than 0.45；
The volume of described water reducer is the 0.6～1.2% of Binder Materials gross mass, and described air entraining agent is the total matter of Binder Materials
The 0.005%～0.02% of amount；Concrete consumption determines according to concrete VC value and air content, how series high-efficiency water-reducing agent and bleed
Agent, technical specification meets GB8076 " concrete admixture " regulation.
The present invention preferably technical scheme: the density that described tuff-powder is processed through grinding by tufa stone ore deposit is
2800kg/m3, fineness is for using 0.045mm square hole screen to tail over 17.6%, and water demand ratio 100%, water content 0.2%, activity refers to
Several 62.5%, the powder of loss on ignition 2.2%；Described tufa stone ore deposit is by the rotten volcanic ash of 25%, and the crystalline substance of 73% is considered to be worth doing, 2%
Landwaste forms.The processing method of tuff-powder is existing conventional rock ore deposit Flour milling method.
The present invention preferably technical scheme: the main chemical compositions of described tuff-powder is: the CaO of 6.15%, 58.08%
SiO2, the Al of 19.67%2O3, 9.86%Fe2O3, the MgO of 1.18%, the SO of 0.16%3。
The present invention preferably technical scheme: described cement is 42.5 moderate-heat portland cements or Portland cement.
The present invention preferably technical scheme: described sandstone aggregate is made up of manual sandstone, its apparent density is 2.65kg/
m3～2.69kg/m3.Sand weight 660kg/m in wherein said concrete3～710kg/m3, great Shi 440kg/m3～600kg/
m3, middle stone 440kg/m3～600kg/m3, gravelstone 440kg/m3～600kg/m3；Wherein, sand particle diameter is 0mm～5mm, great Shi grain
Footpath is 40mm～80mm, middle stone particle diameter is 20mm～40mm, gravelstone particle diameter is 5mm～20mm.
Sandstone consumption and optimum sand coarse aggregate ratio are according to DL5330 " mix proportion of concrete design discipline "；
In the present invention, material quality all meets DL/T5112 " water conservancy project grinding concrete construction specification " relevant regulations.
Heretofore described grinding coagulation soil can reach C9020 strength grade requirements.
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities of the present invention has the advantage that
(1) present invention takes full advantage of tufa stone ore deposit, high altitude localities, deficient at high altitude localities industry goods and materials, and utilizing should
After a large amount of tufa stone breezes mill processing that region exists, carry out concrete batching as admixture, take full advantage of natural resources, solve
Determine existing high altitude localities transport difficult, and the problem affecting engineering construction.
(2) present invention utilizes the blackish green of locality, Tibet mineral resources relict tuff texture to go bad oblique speckle basaltic
Crystal tuff, its mesometamorphism volcanic ash accounts for 25%, brilliant bits account for 73%, landwaste accounts for 2%, as main former material after grinding processing
Material component, the grinding coagulation soil of preparation high altitude localities, adjustable concrete performance, significantly reduce engineering cost, Technological Economy
Remarkable benefit.
(3) concrete of present invention preparation is applicable to high altitude localities, and its intensity reaches C90The stone roller that 20 strength grades require
Pressure concrete, freeze proof grade reaches F150 and above, seepage-resistant grade reach W8 and more than.
The preferably local raw material tuff-powder of patent of the present invention is as concrete mineral admixture, by mix-design,
Preparation high altitude localities tuff-powder grinding coagulation soil, reaches C9020F150W8 technical specification, it is ensured that high altitude localities is rolled
Concrete durability, beneficially the popularization of New Mineral admixture, has broad application prospects.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the polarized light microscopy figure of tufa stone Ore in the present invention.
Fig. 3 and Fig. 4 is the microstructure figure of solidifying ashes in the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, the tuff-powder in embodiment by tufa stone ore deposit through powder
Mill processes, and tufa stone rock ore deposit polarized light microscopy figure is shown in that Fig. 1 and Fig. 2, tufa stone rock ore deposit composition see table:
Tuff-powder chemical composition after grinding processing see table:
Embodiment, a kind of tuff-powder grinding coagulation soil being applicable to high altitude localities, comprise the following steps:
(1) clear and definite design objective
Tibet hydraulic engineering grinding coagulation soil, height above sea level 3300km, designs desired strength grade C9020, freeze proof grade
F150, seepage-resistant grade W8.
(2) tuff-powder mineral admixture
The blackish green using the Shannan Prefecture goes bad oblique speckle basaltic crystal tuff mineral resources, after grinding is processed, and tufa stone
Microstructure figure such as Fig. 3 and Fig. 4 of powder, its technical specification see table 1:
The technical specification of table 1 tuff-powder
(3) other raw materials
New 42.5 moderate-heat portland cements of Tibet China, locality, Tibet granite hand breaking sand material, Jiangsu Bo Te JM-II
How to be efficient retardation water reducing agent and Zhejiang dragon trip ZB-1 air entraining agent.
(4) concrete batching
Specify according to DL5330 " mix proportion of concrete design discipline ", be calculated C90The configuration intensity of 20 concrete
For 23.4MPa.In conjunction with absolute volume method, design and optimize graduation three Roller Compacted Concrete Dam mix proportion, and folk prescription concrete is former
Material usage, is shown in Table 2 and table 3 respectively.
Table 2 Roller Compacted Concrete Dam mix proportion
Table 3 grinding coagulation soil raw material usage
(5) testing concrete performance
With reference to DL/T 5433 " water conservancy project grinding coagulation soil testing regulations ", mix and stir, molding and maintenance roller compacted concrete specimens,
Indices the results are shown in Table 2.3.
Result of the test shows, concrete batching system is functional, and 90d comprcssive strength reaches preparation strength requirement, freeze proof and
Seepage-resistant grade is satisfied by design objective.
Table 2.3 testing concrete performance result
Shown by the result in above-described embodiment, the concrete crushing strength that two kinds of formula are prepared out, freeze proof grade,
Seepage-resistant grade all reaches to design requirement, goes for high altitude localities.
Claims (6)
1. the tuff-powder grinding coagulation soil being applicable to high altitude localities, it is characterised in that described grinding coagulation soil is by glue
Gel material, sandstone aggregate, water, water reducer and air entraining agent composition, the physical property of described concrete is: air content 3.5%～
Between 5.5%, VC value is between 2.0s～6.0s, and concrete apparent density is 2400kg/m3～2500kg/m3；Wherein every square
In rice concrete, each component addition is as follows:
The addition of described Binder Materials is 190kg/m3～230kg/m3；And Binder Materials be the cement by 60%～95% and
5%～40% tuff-powder composition, or by 40%～90% cement, 10%～60% tuff-powder press with I level flyash
The mixed mixed powder of ratio according to mass ratio 1:1 forms；
The addition of described sandstone aggregate is 2100kg/m3～2200kg/m3；And the sand coarse aggregate ratio in sandstone aggregate is 31～33%, institute
Stating stone is to be by mass ratio: 30～the great Shi of 40%, and in 30～40%, stone and 30～40% forms；
The addition of described water is 80kg/m3～95kg/m3, water and Binder Materials mass ratio are not more than 0.45；
The volume of described water reducer is the 0.6～1.2% of Binder Materials gross mass, and described air entraining agent is Binder Materials gross mass
0.005%～0.02%.
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities the most according to claim 1, it is characterised in that:
Described tuff-powder by tufa stone ore deposit through the density that grinding is processed be 2800kg/m3, fineness is for using 0.045mm square hole screen sieve
Yu 17.6%, water demand ratio 100%, water content 0.2%, activity index 62.5%, the powder body of loss on ignition 2.2%；Described solidifying ash
Rock ore deposit is by the rotten volcanic ash of 25%, 73% brilliant bits, the landwaste composition of 2%.
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities the most according to claim 1 and 2, its feature exists
Main mine content of material in described tuff-powder is: the CaO of 6.15%, the SiO of 58.08%2, the Al of 19.67%2O3,
The Fe of 9.86%2O3, the MgO of 1.18%, the SO of 0.16%3。
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities the most according to claim 1 and 2, its feature exists
In: described sandstone aggregate is made up of manual sandstone, and its apparent density is 2.65kg/m3～2.69kg/m3。
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities the most according to claim 1 and 2, its feature exists
In: described cement is 42.5 moderate-heat portland cements or Portland cement.
A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities the most according to claim 1 and 2, its feature exists
In: sand weight 660kg/m in described concrete3～710kg/m3, great Shi 440kg/m3～600kg/m3, middle stone 440kg/m3~
600kg/m3, gravelstone 440kg/m3～600kg/m3；Wherein, sand particle diameter is 0mm～5mm, great Shi particle diameter be 40mm～80mm,
Middle stone particle diameter is 20mm～40mm, gravelstone particle diameter is 5mm～20mm.
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| CN201610493569.5A CN106186901A (en) | 2016-06-29 | 2016-06-29 | A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109704620A (en) * | 2019-02-15 | 2019-05-03 | 华电西藏能源有限公司大古水电分公司 | Concrete admixture and its preparation method and application suitable for Cold and dry environment |
| CN110981256A (en) * | 2019-12-18 | 2020-04-10 | 竹鹏翔 | Preparation method of admixture for high-performance concrete in severe cold plateau area |
| CN111792889A (en) * | 2020-05-26 | 2020-10-20 | 中建西部建设股份有限公司 | Natural tuff ultrahigh-performance concrete and preparation method thereof |
| CN116003067A (en) * | 2023-01-06 | 2023-04-25 | 中铁十五局集团有限公司 | High-strength anti-freezing concrete based on modified cement and preparation method thereof |
| CN116199473A (en) * | 2022-12-16 | 2023-06-02 | 中国电建集团中南勘测设计研究院有限公司 | Gabbro aggregate roller compacted concrete and preparation method thereof |
| CN117361909A (en) * | 2023-10-08 | 2024-01-09 | 中国建筑土木建设有限公司 | Preparation method of high-strength tuff composite cementing material |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704620A (en) * | 2019-02-15 | 2019-05-03 | 华电西藏能源有限公司大古水电分公司 | Concrete admixture and its preparation method and application suitable for Cold and dry environment |
| CN109704620B (en) * | 2019-02-15 | 2021-04-09 | 华电西藏能源有限公司大古水电分公司 | Concrete admixture suitable for cold and dry environment and preparation method and application thereof |
| CN110981256A (en) * | 2019-12-18 | 2020-04-10 | 竹鹏翔 | Preparation method of admixture for high-performance concrete in severe cold plateau area |
| CN111792889A (en) * | 2020-05-26 | 2020-10-20 | 中建西部建设股份有限公司 | Natural tuff ultrahigh-performance concrete and preparation method thereof |
| CN116199473A (en) * | 2022-12-16 | 2023-06-02 | 中国电建集团中南勘测设计研究院有限公司 | Gabbro aggregate roller compacted concrete and preparation method thereof |
| CN116003067A (en) * | 2023-01-06 | 2023-04-25 | 中铁十五局集团有限公司 | High-strength anti-freezing concrete based on modified cement and preparation method thereof |
| CN116003067B (en) * | 2023-01-06 | 2024-09-10 | 中铁十五局集团有限公司 | High-strength anti-freezing concrete based on modified cement and preparation method thereof |
| CN117361909A (en) * | 2023-10-08 | 2024-01-09 | 中国建筑土木建设有限公司 | Preparation method of high-strength tuff composite cementing material |
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