CN109485351A - A kind of concrete and its processing technology - Google Patents
A kind of concrete and its processing technology Download PDFInfo
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- CN109485351A CN109485351A CN201910013641.3A CN201910013641A CN109485351A CN 109485351 A CN109485351 A CN 109485351A CN 201910013641 A CN201910013641 A CN 201910013641A CN 109485351 A CN109485351 A CN 109485351A
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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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to the technical fields of concrete, more particularly to a kind of concrete, raw material components including following parts by weight: 180-300 parts of cement, 30-50 parts of flyash, 120-180 parts of waste stone dust, 60-120 parts of CHARACTERISTICS OF TAILINGS SAND, 780-900 parts of mixed sand, 120-200 parts of hollow glass micropearl, 950-1100 parts of stone, 10-18 parts and water 110-160 parts of additive, the mixed sand includes accounting for the component of the following weight percentage of mixed sand gross weight: Weathered Sand 28-45% and ultra fine sand 55-72%, the fineness modulus of the ultra fine sand is 1.0-1.4, the fineness modulus of the mixed sand is not less than 3, the partial size of the hollow glass micropearl is 200-450 μm；The present invention has grading of aggregates continuous, in the case where same concrete strength, the advantages of relative reduction gel material content；The present invention also provides the processing technologys of the concrete.
Description
Technical field
The present invention relates to the technical fields of concrete, and in particular to a kind of concrete and its processing technology.
Background technique
Concrete, referred to as " concrete (t ó ng) " refer to the cementing integral engineered composite material of aggregate by cementitious material
General designation.One word of concrete usually said, which refers to, makees cementitious material, sand, masonry aggregate with cement；With water (additive can be contained and mixed
Close material) cooperate by a certain percentage, it is agitated obtained by cement concrete, also referred to as normal concrete, it is widely used in building work
Journey.In order to which in the case where guaranteeing same compression strength, reduction cementitious material additive amount occurs at present as far as possible with save the cost
Ultra fine sand is added into concrete, cooperates aggregate, suitably to reduce the addition cost of cementitious material.
Ultra fine sand refers to that fineness modulus is 0.70~1.50 sand, general with average grain diameter is small, grain composition is poor, fineness
The characteristics of modulus is small, clay content is big, voidage is high, large specific surface area and be widely applied in the production and processing of concrete.But
It is that bulky grain is less in ultra fine sand, when mixing aggregate with coarse aggregate composition, intergrade missing, rheological property of concrete is poor, collapses
Slurry stone separation is be easy to cause when degree of falling is big；And the slump increases, and the dosage of cementitious material will be caused to increase, and concrete shrinkage increases
Greatly, cracking risk increases.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide, a kind of grading of aggregates is continuous, phase
To the concrete for reducing gel material content.
The first purpose of this invention is achieved through the following technical solutions:
A kind of concrete, the raw material components including following parts by weight: 180-300 parts of cement, 30-50 parts of flyash, waste stone dust
120-180 parts, 60-120 parts of CHARACTERISTICS OF TAILINGS SAND, 780-900 parts of mixed sand, 120-200 parts of hollow glass micropearl, stone 950-1100
Part, 10-18 parts of additive and 110-160 parts of water, the mixed sand includes accounting for the group of the following weight percentage of mixed sand gross weight
Point: Weathered Sand 28-45% and ultra fine sand 55-72%, the fineness modulus of the ultra fine sand are 1.0-1.4, the mixed sand it is thin
It spends modulus and is not less than 3, the partial size of the hollow glass micropearl is 200-450 μm.
By using above-mentioned technical proposal, Weathered Sand is that rock is crushed disintegration after being subjected to long-term slacking and generates
A kind of product, it is widely distributed in China, especially on the Yiling District of Yichang reservoir area of Three Gorges, Zigui County, Xingshan County and other places,
Even more it is seen everywhere all over the mountains and plains.Weathered Sand has certain partial size, and corner angle are clearly demarcated, is 1.0- using Weathered Sand and fineness modulus
The ultra fine sand of 1.4 (average grain diameter is between 0.15-0.25mm) is mixed to get mixed sand (average grain of the fineness modulus not less than 3
Diameter is in 0.4mm or more)；Hollow glass micropearl is small sphere, and ball-type rate is big, and the specific surface area with very little, it is in coagulation
Can have good dispersibility in native aggregate mixture, it is easy to be compacted it is closely knit, therefore it have very high filling capacity；
The hollow glass micropearl that partial size is 200-450 μm is added, fills the intergrade of Weathered Sand and ultra fine sand, matches coarse-fine aggregate
It closes, realizes the continuity of grading of aggregates, concrete is made cementitious material will not to be caused to use in the relatively high slump
The problem of amount increases occurs, and in the case where same concrete strength, gel material content relative reduction.
Preferably, including the raw material components of following parts by weight: 220-280 parts of cement, 35-46 parts of flyash, waste stone dust
135-160 parts, 80-100 parts of CHARACTERISTICS OF TAILINGS SAND, 820-880 parts of mixed sand, 150-180 parts of hollow glass micropearl, stone 980-1050
Part, 12-16 parts of additive and 120-150 parts of water, the mixed sand includes accounting for the group of the following weight percentage of mixed sand gross weight
Point: Weathered Sand 28-45% and ultra fine sand 55-72%.
Preferably, including the raw material components of following parts by weight: 250 parts of cement, 43 parts of flyash, 147 parts of waste stone dust, tail
80 parts of ore in sand form, 840 parts of mixed sand, 165 parts of hollow glass micropearl, 1000 parts of stone, 14 parts of additive and 132 parts of water, it is described mixed
Closing sand includes the component for accounting for the following weight percentage of mixed sand gross weight: Weathered Sand 35% and ultra fine sand 65%.
The comprehensive performance of concrete is improved by optimization each raw material component proportion by using above-mentioned technical proposal.
Preferably, the stone is 5-15mm continuous grading, crush values 6.9%, clay content is no more than 0.9%.
By using above-mentioned technical proposal, stone cooperates mixed sand and hollow glass as coarse aggregate, the selection of continuous grading
Glass microballon is further ensured that the gradation of coarse-fine aggregate is continuous, guarantees the rheological characteristic of concrete, will not make when the slump is big
Stone separation is slurried；Overcome because intergrade missing cause the slump increase due to cause the dosage of cementitious material to increase, concrete receipts
The problem of contracting increases, cracking risk increases.The clay content for controlling stone is not more than 0.9%, can be in the stone feelings of equivalent weight
Under condition, the opposite hardness and strength for improving stone, thus the opposite structural strength for improving concrete.
Preferably, the moisture content of the waste stone dust is not more than 0.8%, partial size is 180-220 mesh.
By using above-mentioned technical proposal, stone material can generate a large amount of waste material in process, mainly include leftover pieces
And mountain flour, waste stone dust is applied in concrete processing, the waste stone dust for generating processing of stone is comprehensively utilized, effectively
Solve mountain flour pollution problem, economical environment-protective.Since inventor produces concrete as raw material using waste stone dust, accumulation is used
1000 tons of waste stone dust, not only waste material is turned waste into wealth, but also flyash dosage is made to have saved about 700 tons, cost is saved, to section
Energy emission reduction greatly facilitates effect.
Preferably, the granularity of the CHARACTERISTICS OF TAILINGS SAND is 0.20-0.35mm.
By using above-mentioned technical proposal, CHARACTERISTICS OF TAILINGS SAND is dressing plant by grinde ore, choose discharge after useful component it is useless
Gurry is generally given up by the solid mineral that the tailing ore pulp that dressing plant is discharged is formed after natural-dehydration, the master of solid industrial waste material
Want ingredient, can be considered a kind of compound silicate the mineral materials such as carbonate, CHARACTERISTICS OF TAILINGS SAND is used in concrete, is turned waste into wealth,
Energy-saving and emission-reduction.The granularity of CHARACTERISTICS OF TAILINGS SAND is 0.20-0.35mm, cooperates ultra fine sand 0.15-0.25mm and hollow glass micropearl 0.2-
0.45mm makes fine aggregate form connection gradation, after Weathered Sand, forms the fine aggregate for being greater than 0.5mm, cooperates continuous grading
The rheological characteristic of concrete can be effectively ensured in coarse aggregate, improve the workability of concrete.
Preferably, the flyash is second level selection by winnowing flyash.
By using above-mentioned technical proposal, flyash is the fine ash that catching is got off from the flue gas after coal combustion, flyash
It is the primary solids waste of coal-burning power plant's discharge.The main oxides of Chinese thermal power plant's flyash form are as follows: SiO2、Al2O3、
FeO、Fe2O3、CaO、TiO2Deng.Flyash is one of biggish industrial residue of the current discharge capacity in China, with the hair of power industry
Exhibition, the flyash discharge capacity of coal-burning power plant increase year by year.A large amount of flyash is untreated, will generate fugitive dust, pollutes atmosphere；
Silt up if being discharged into water system and will cause river, and toxic chemical substance therein can also cause damages to human body and biology, by fine coal
Admixture of the ash as concrete, i.e., it is energy saving and environmentally friendly.Under normal circumstances, second level can be used in concrete works C30 or less (containing)
Level-one flyash can be used in flyash, C30 or more, and three-level flyash does not use in principle.
Preferably, the additive is high performance water reducing agent of polyocarboxy acid.
By using above-mentioned technical proposal, high performance water reducing agent of polyocarboxy acid is a variety of macromolecules based on polycarboxylate
Organic compound is generated through graft copolymerization, has extremely strong water-reducing property, and the environment-friendly type for belonging to technological precedence in the world today is mixed
Solidifying soil additive.Good with the compatibility of various cement, the slump-retaining of concrete can be good, and volume is low, and water-reducing rate is high, shrinks
It is small, early stage, the later strength of concrete can be increased substantially.And its chloride ion content is low, alkali content is low, is conducive to coagulation
The durability of soil.
Preferably, the cement is ordinary portland cement.
By using above-mentioned technical proposal, ordinary portland cement, by the mixing material of Portland clinker, 5%-20%
Material and the levigate manufactured hydraulic cementing materials of proper amount of gypsum.Big with intensity height, the heat of hydration, frost resistance is good, drying shrinkage is small, wear-resisting
Property is preferable, carbonization resistance is preferable, poor corrosion resistance, the characteristic of non-refractory.
A second object of the present invention is to provide a kind of processing technologys of above-mentioned concrete.
Second object of the present invention is achieved through the following technical solutions:
A kind of processing technology of concrete, including following operating procedure:
Cement, flyash and waste stone dust are mixed, mixture A is obtained；By CHARACTERISTICS OF TAILINGS SAND, mixed sand, stone, additive and water
It is mixed, obtains mixture B；Mixture A is added in mixture B, hollow glass micropearl is stirring evenly and then adding into, with 30-
0.5-1.5min is mixed in the speed of 50r/min, obtains concrete.
By using above-mentioned technical proposal, controls hollow glass micropearl and be stirred in each aggregate of concrete with additive
It adds, that is, is eventually adding after uniformly, and control and stirred under mild mixing speed, it is ensured that hollow glass micropearl keeps structure
Integrality cooperates coarse-fine aggregate, plays reduction concrete slump to guarantee that it can fill up the intergrade of aggregate missing
Effect.
In conclusion the invention has the following beneficial effects:
(1) hollow glass micropearl is added, CHARACTERISTICS OF TAILINGS SAND is cooperated to make thickness bone for filling the intergrade of Weathered Sand and ultra fine sand
Material cooperation, realizes the continuity of grading of aggregates, and concrete is made not cause gelling material in the relatively high slump
The problem of material dosage increases occurs；
(2) water-cement ratio of concrete of the invention is up to 0.60, while guaranteeing that concrete performance is up to standard, reduces water
The additive amount of mud and flyash reduces the cost of cementitious material；
(3) using concrete made from formula and processing technology of the invention, the compression strength of 28d is up to 64.1Mpa, and
And the properties of Evaluation on Workability have further promotion compared to existing concrete, and reach excellent level；
(4) on the one hand the addition of CHARACTERISTICS OF TAILINGS SAND and waste stone dust plays the role of turning waste into wealth, on the other hand, relative reduction powder
The additional amount of coal ash, every 100 tons of concrete can about save 0.38 ton of flyash.
Specific embodiment
The contents of the present invention are further detailed combined with specific embodiments below.
In the raw material of fabrication of concrete of the present invention: additive selects high performance water reducing agent of polyocarboxy acid, moistens Feng Shi selected from Nantong
Oily Chemical Co., Ltd., solid content 20 ± 2%, density 1.08 ± 0.02g/ml, pH 6-7, chloride ion < 0.05, cement paste
Fluidity, W/C=0.29 >=250mm: cement is PC32.5 ordinary portland cement；Stone is the stone of the continuous grading of 5-15mm
Son, crush values 6.9%, clay content are not more than 0.9%；The moisture content of waste stone dust is not more than 0.8%, selects partial size for 180-
The particle in 220 mesh sections；The particle of CHARACTERISTICS OF TAILINGS SAND selection 0.20-0.35mm grain size intervals；Flyash is second level selection by winnowing flyash.It is empty
It is 200-450 μm of size that heart glass microballoon, which selects partial size, and CHARACTERISTICS OF TAILINGS SAND, waste stone dust, hollow glass micropearl are in the same embodiment
There is the particle of size in respective grain size intervals, guarantee continuous grading；The fineness modulus that Weathered Sand is controlled in each embodiment, makes
The fineness modulus for the mixed sand that ultra fine sand and Weathered Sand are mixed to get is not less than 3.
Embodiment 1
According to the additive amount of each raw material in table 1, by cement, flyash and waste stone dust, mixing and dry mixing in machine mixer is added
1.5 minutes, obtain mixture A；CHARACTERISTICS OF TAILINGS SAND, Weathered Sand, the ultra fine sand that fineness modulus is 1.0, stone, additive and water are added
Another stirrer for mixing stirs 1.5 minutes, obtains mixture B；Mixture A is exported from blender and imports another
It is mixed in blender with mixture B, hollow glass micropearl is added after 2 minutes in stirring, is mixed 1.5 with the speed of 30r/min
Minute, obtain concrete.
Embodiment 2
Cement, flyash and waste stone dust are added in machine mixer and are mixed simultaneously according to the additive amount of each raw material in embodiment 1
Dry mixing 1.5 minutes, obtain mixture A；By CHARACTERISTICS OF TAILINGS SAND, Weathered Sand, ultra fine sand, stone, additive and the water that fineness modulus is 1.1
Another stirrer for mixing is added to stir 1.5 minutes, obtains mixture B；Mixture A is exported from blender and is imported another
It is mixed in one blender with mixture B, hollow glass micropearl is added after 2 minutes in stirring, is mixed with the speed of 40r/min
1 minute, obtain concrete.
Embodiment 3
Cement, flyash and waste stone dust are added in machine mixer and are mixed simultaneously according to the additive amount of each raw material in embodiment 1
Dry mixing 1.5 minutes, obtain mixture A；By CHARACTERISTICS OF TAILINGS SAND, Weathered Sand, ultra fine sand, stone, additive and the water that fineness modulus is 1.2
Another stirrer for mixing is added to stir 1.5 minutes, obtains mixture B；Mixture A is exported from blender and is imported another
It is mixed in one blender with mixture B, hollow glass micropearl is added after 2 minutes in stirring, is mixed with the speed of 50r/min
0.5 minute, obtain concrete.
Embodiment 4-9
The preparation method of the concrete of embodiment 4-9 is identical with embodiment 2, and difference is the additive amount of each raw material component not
Together, specific additive amount is shown in Table 1.Wherein, the fineness modulus of the ultra fine sand of embodiment 4-9 is respectively 1.2,1.2,1.4,1.4,1.3
With 1.1.
The additive amount of each raw material component of concrete is prepared in 1 embodiment 1-9 of table
Comparative example 1
Comparative example 1 the difference from example 2 is that: without hollow glass micropearl in the raw material in comparative example 1, remaining and embodiment 2
It is consistent.
Comparative example 2
Application publication number is concrete made from embodiment 1 in the application for a patent for invention of 107459308 A of CN.
Performance detection according in JGJ/T 283-2012 examination criteria and detection method and the technical regulation involved by
The coherent detection standard and method arrived carries out performance detection to the concrete of embodiment 1-9 and comparative example 1 and comparative example 2, specifically
Testing result is shown in Table 2.
The performance test results of the concrete of 2 embodiment 1-9 of table, comparative example 1-2
Shown to utilize concrete made from formula and processing technology of the invention, the pressure resistance of 28d by the testing result in table 2
Degree is up to 64.1Mpa, and compared with the concrete of the patent application publication of comparative example 2, the properties of Evaluation on Workability are equal
There is further promotion, and reach excellent level, reflects concrete flowability of the present invention, cohesiveness, good water-retaining property, tool
Body evaluation index table is referring to the table 1 in comparative example 2.The water-cement ratio of concrete of the invention is up to 0.60, is guaranteeing coagulation
While soil nature can be up to standard, the additive amount of cement, flyash, miberal powder is reduced, the cost of cementitious material is reduced.In addition, by
Comparative example 1 and embodiment 2 comparison it is found that in the present invention hollow glass micropearl addition, the resistance to compression of concrete not only can be enhanced
Intensity, and there is influence on the slump of concrete, after removing hollow glass micropearl, in the case where same water-cement ratio, press
According to inventive formulation processing concrete the slump it is excessive, the rheological characteristic of concrete is too big, and make concrete be difficult to solidify it is solidifying
Knot, the dosage for needing to increase cementitious material is just able to satisfy the requirement of construction, therefore hollow glass micropearl is applied to of the invention match
Fang Zhong also plays positive facilitation to the easy of concrete and property.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of concrete, which is characterized in that the raw material components including following parts by weight: 180-300 parts of cement, flyash 30-
50 parts, 120-180 parts of waste stone dust, 60-120 parts of CHARACTERISTICS OF TAILINGS SAND, 780-900 parts of mixed sand, 120-200 parts of hollow glass micropearl, stone
950-1100 parts sub-, 10-18 parts of additive and 110-160 parts of water, the mixed sand include accounting for the following weight hundred of mixed sand gross weight
Divide the component of content: Weathered Sand 28-45% and ultra fine sand 55-72%, the fineness modulus of the ultra fine sand is 1.0-1.4, described mixed
The fineness modulus for closing sand is not less than 3, and the partial size of the hollow glass micropearl is 200-450 μm.
2. concrete according to claim 1, which is characterized in that the raw material components including following parts by weight: cement 220-
280 parts, 35-46 parts of flyash, 135-160 parts of waste stone dust, 80-100 parts of CHARACTERISTICS OF TAILINGS SAND, 820-880 parts of mixed sand, hollow glass it is micro-
150-180 parts of pearl, 980-1050 parts of stone, 12-16 parts of additive and 120-150 parts of water, the mixed sand include accounting for mixed sand
The component of the following weight percentage of gross weight: Weathered Sand 28-45% and ultra fine sand 55-72%.
3. concrete according to claim 1, which is characterized in that the raw material components including following parts by weight: cement 250
Part, 43 parts of flyash, 147 parts of waste stone dust, 80 parts of CHARACTERISTICS OF TAILINGS SAND, 840 parts of mixed sand, 165 parts of hollow glass micropearl, stone 1000
Part, 14 parts of additive and 132 parts of water, the mixed sand includes accounting for the component of the following weight percentage of mixed sand gross weight: weathering
Sand 35% and ultra fine sand 65%.
4. concrete according to claim 1, it is characterised in that: the stone is 5-15mm continuous grading, crush values
It is 6.9%, clay content is not more than 0.9%.
5. concrete according to claim 1, it is characterised in that: the moisture content of the waste stone dust is not more than 0.8%, partial size
For 180-220 mesh.
6. concrete according to claim 1, it is characterised in that: the granularity of the CHARACTERISTICS OF TAILINGS SAND is 0.20-0.35mm.
7. concrete according to claim 1, it is characterised in that: the flyash is second level selection by winnowing flyash.
8. concrete according to claim 1, it is characterised in that: the additive is high performance water reducing agent of polyocarboxy acid.
9. concrete according to claim 1, it is characterised in that: the cement is ordinary portland cement.
10. a kind of processing technology of the described in any item concrete of claim 1-9, which is characterized in that including operating step as follows
It is rapid:
Cement, flyash and waste stone dust are mixed, mixture A is obtained；By CHARACTERISTICS OF TAILINGS SAND, mixed sand, stone, additive and water
It is mixed, obtains mixture B；Mixture A is added in mixture B, hollow glass micropearl is stirring evenly and then adding into, with 30-
0.5-1.5min is mixed in the speed of 50r/min, obtains concrete.
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