CN109437724A - A kind of enhanced flyash, trass concrete - Google Patents
A kind of enhanced flyash, trass concrete Download PDFInfo
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- CN109437724A CN109437724A CN201811608360.4A CN201811608360A CN109437724A CN 109437724 A CN109437724 A CN 109437724A CN 201811608360 A CN201811608360 A CN 201811608360A CN 109437724 A CN109437724 A CN 109437724A
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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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
- 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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- Organic Chemistry (AREA)
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Abstract
The present invention is a kind of enhanced flyash, trass concrete, according to poidometer, including 300-500 parts, 100-300 parts sand of cementitious material, 100-300 parts of stones, 100-200 parts of water and 1-5 parts of additives, the cementitious material includes 40-60% cement, 20-50% flyash, 20-40% volcanic ash, and the weight ratio of the flyash and volcanic ash is (1-2): (1-3).The present invention is cooperated the grey lime that can achieve better effect, and joined a small amount of by ash flow and flyash under certain proportion, can significantly improve the intensity of concrete；Seven grades of gradations of sand and stone are devised, the ratio of seven grades of gradations meets described in practice, improves concrete workability to improve concrete strength, can greatly improve the performance of concrete.
Description
Technical field
The present invention relates to technical field of concrete, and in particular to a kind of enhanced flyash, trass concrete.
Background technique
Mineral admixture is the indispensable component of modern concrete, and universal mature way is in concrete both at home and abroad
Flyash, slag powders and silicon ash are admixed, but with the expansion that China's large-scale basis is built, concrete yield is increased sharply, caused
High-quality admixture is increasingly in short supply, and the phenomenon that resource scarcitys such as flyash, slag occur in many areas.Therefore, there is an urgent need to open
To send out a kind of easy to obtain, high-quality cheap new admixture substitute.Volcanic ash is the microdebris object generated by colcanism,
Its main component is rock, mineral, volcanic glass fragment, and diameter is less than 2mm.In China, North gets Heilungkiang south to Hainan Island
Volcano distributed area, volcanic ash resource are extremely abundant.
The introducing of volcanic ash, which utilizes, reduces engineering cost.However, since natural volcanic ash has loose porous, specific gravity
The features such as small, adsorptivity is compared with strong, large specific surface area, low activation index, the concrete prepared with it there are the water requirements big, slump
The problems such as loss is fast, additive bad adaptability, early strength is low, strength development is slow, durability is inadequate.CN106882941A is disclosed
A kind of high-performance trass concrete, including cementitious material, sand, stone, water and additive, the cementitious material include water
Mud, high-quality volcanic ash, silicon ash, the additive are high efficiency water reducing agent；Each raw material composition in the high-performance trass concrete
Are as follows: dosage≤150kg of water, the total amount of cementitious material are 300kg/m3-350kg/m3, in which: cement consumption is that cementitious material is total
The 50%-60% of amount；High-quality volcanic ash dosage is the 30%-40% of binder total amount；Silicon ash dosage is binder total amount
2%-5%；The dosage of the high efficiency water reducing agent is the 0.5%-1.0% of binder total amount；Sand: 325-370kg/m3；Sand
Rate is 40%-44%；Water-cement ratio is not more than 0.5.The coagulation earth fall effect of technical solution preparation is good, has corrosion resistance,
Cost of material is low, cost performance is high, however intensity is lacking, it is also necessary to improve.
CN102153325A discloses a kind of medium-strength-grade high-performance concrete using volcanic ash as admixture, cubic meter meter glue
Gel material total amount be 320~380kg, by weight percentage cementitious material cement 65~68%, volcanic ash 30%, silicon ash 2~
5%, polycarboxylic acid series high efficiency water reducing agent is added by the 0.8~1.0% of cementitious material weight when Concrete.The technical solution is
Engineering site is prepared using volcanic ash admixture and uses the exploitation benefit of the maximum moderate strength grade concrete of the scale of construction and volcanic ash
With providing effective technological approaches, workability and durability can reach the index request of high performance concrete, but intensity and
Corrosion resistance is inadequate, it is still necessary to improve.
In conclusion the prior art still lacks a kind of compound blending of strong concrete that can preferably use volcanic ash
Material.
Summary of the invention
It is an object of the present invention to provide a kind of enhanced flyash, trass concrete, flyash is coal-burning power plant's discharge
A kind of waste can be used as a kind of mineral admixture in concrete, and the maximum mineral admixture of dosage at present, therefore,
The application volcanic ash and flyash collocation are capable of the usage amount of magnanimous reduction flyash, economize on resources.Specific side of the invention
Case is as follows.
A kind of enhanced flyash, trass concrete, according to poidometer, including 300-500 parts of cementitious material, 650-
850 parts of sand, 950-1100 parts of stones, 100-200 parts of water and 1-5 parts of additives, the cementitious material include 40-60% cement,
20-50% flyash, 20-40% volcanic ash.
Preferably, the weight ratio of the flyash and volcanic ash is 1-2:1-3.
Volcanic ash primary chemical composition is silica, aluminium oxide and di-iron trioxide, similar to fine coal ash composition, but
Pozzolan particle is multi-angular, and flyash is a kind of waste of coal-burning power plant's discharge, generally spherical, therefore, ash flow
Much smaller than flyash of dynamic degree, therefore flyash has water-reduction, volcanic ash has effect of surging, and the two is under certain proportion
Mutual cooperation can achieve better effect.
Preferably, the cementitious material further includes agstone, and by weight, 40-60% cement, 10-50% fine coal
Ash, 20-40% volcanic ash, agstone 5-10%.
Agstone substantially belongs to inert substance, and natural volcanic ash water requirement is larger, and activity is higher, therefore, is added one
Fixed agstone can preferably cooperate with volcanic ash, and when reducing the volume of lime stone, integral system can be improved
Fluidity, and then improve the activity of system, but if lime stone adds excessive, activity can be reduced instead, therefore 5-10%
Ratio is relatively good.
Preferably, the volcanic ash refers to volcanic ash raw ore through obtained by following processing:
(1) volcanic ash raw ore is subjected to ball-milling treatment, Ball-milling Time is no less than 2 hours；
(2) by step (1) handle volcanic ash raw ore be added to the water, obtain ash field mineral water solution, be stirred continuously into
Row is cleaned, and alkaline conditioner is then added, continues to stir, and dispersing agent is added, and continuing stirring to scouring terminates；
(3) solution obtained after cleaning in step (2) retains screenings through 160-200 mesh, and is centrifuged
Processing retains precipitating, as high-quality volcanic ash after centrifugation.
For volcanic ash after physical treatment, particle becomes thinner, and disposes the inert layer on surface, can enhance particle
Surface-active, have better filling effect.By solution dissolution, then alkalinity is adjusted, and can be improved the work of particle surface
Property.
Preferably, the gradation of the sand is as follows: 5-2.5mm points of meters tail over 10-16%；2.5-1.25mm points of meters tail over 8-
15%；1.25-0.63mm a point meter tails over 15-30%；0.63-0.315mm points of meters tail over 10-30%；0.315-0.16mm points of meters
Tail over 10-30%；0.16-0.08mm points of meters tail over 3-15%；Sieve bottom 1-3%；The sand be one of river sand, artificial sand or
Person's mixture, the grain fineness number modulus are 3.1-3.7.
It is that 2.5mm-5mm partial size outer-area in unit-quantity is defined as 1 unit than granularity, ideally, aggregate compares table
Area is inversely proportional with aggregate size, therefore corresponding to each partial size points of meter can be tailed over and be multiplied with corresponding to the partial size than granularity
Obtain total ratio granularity, come characterize aggregate total surface area size.So far, we proposed on the basis of than granularity one it is new
Index measure the superiority and inferiority of aggregate quality: than real coefficient (B) — that is, than the ratio of granularity and compactness.
B=β/D
D=1-VL
B-compares real coefficient in formula；β-compares granularity；D-bulk density compactness；VL- bulk density voidage.
Present invention applicant according to " Standard for test methods of properties of ordinary concrete mixture standard " (GB/T 50080-2002),
" Test method for fluidity of cement mortar " (GB/T2419-2005) is tested.Using Guangdong Xin Ze construction material Co., Ltd
PII42.5R cement, S95 grades of miberal powders, II grades of flyash and sandstone.Additive is had using Guangdong Fu Te new material science and technology
The FT-I type high performance water reducing agent of polyocarboxy acid of limit company production.The each component performance of concrete material is as shown in table 1- table 5.
1 cement performance index of table
2 miberal powder performance indicator of table
3 flyash performance indicator of table
4 impact crushing stone performance indicator of table
5 additive performance indicator of table
We use 20 groups of natural sands or artificial combination graded sand, according to the ratio real coefficient pair of 7 cement mortar ratio of table research sand
The influence of plaster workability, experimental data are shown in Table 8.
Table 6 is than the granularity table of comparisons
7 glue sand of table proportion
Influence of the table 8 than real coefficient to mortar fluidity
(MxFor fineness modulus；ρLFor bulk density；L is mortar fluidity)
By digital simulation, it can be deduced that: L=-0.0004B2+ 0.1214B+9.0307, coefficient R2=0.9117.
It is had good correlation than real coefficient and the working performance of prepared concrete, the mobility of concrete comes from
In slurry more than needed, having more than needed, slurry is more, and mobility is better, and slurry more than needed then from the slurry for removing package aggregate and is filled out
Fill the remainder of the slurry in aggregate gap.In the case where other materials is constant, the ratio real coefficient of sand is smaller, and what is made is mixed
The mobility for coagulating soil is relatively also better.
Sand in the range of seven grades of gradations of the application than real coefficient between 10-18, the concrete flowability of acquisition
Relatively preferably, the voidage and specific surface area for maximally reducing aggregate can effectively increase slurry more than needed, pass through improvement
Fine aggregate gradation can effectively improve the intensity of concrete, be conducive to the raising of working performance of concrete.
It is studied in conjunction with appeal, the application is by practice discovery for many years, when flyash, trass concrete complex mixture, such as
Fruit targetedly designs the gradation of sand and stone, more closely knit, sand and the stone that mixture can be made to fill
There is better supporting role as aggregate, the intensity of system can be enhanced.
Grain fineness number modulus is calculated by following equation, [(β2+β3+β4+β5+β6)-5β1]/(100-β1)；Wherein β 1 is 5-
2.5mm points of meters tail over value, and β 2 is that 2.5-1.25mm points of meters tail over value, and β 3 is that 1.25-0.63mm points of meters tail over value, and β 4 is 0.63-
0.315mm points of meters tail over value, and β 5 is that 0.315-0.16mm points of meters tail over value, and β 6 is that 0.16-0.08mm points of meters tail over value.For example, β
1、β2、β3、β4、β5、β6Respectively 20.2%, when 30.0%, 10.2%, 17.6%, 19.0%, 2.0%, 1.0%, the fineness of sand
Modulus is (β 2+ β 3+ β 4+ β 5+ β 6-5 β 1)/(100- β 1)=3.55.
Preferably, the additive includes water-reducing agent, high molecular polymer reinforcing agent.
Preferably, the water-reducing agent is FT-I type high performance water reducing agent of polyocarboxy acid, connect according to following raw material weight ratio
Branch copolymerization is made: 2~4 parts of unsaturated carboxylic acid, 3.5~5 parts of beta-unsaturated esters, and 0.3~0.7 part of crosslinking agent, polyether macromonomer 0.5-
1.5 parts, 0.5~1.5 part of cationic unsaturated monomer, 0.07~0.15 part of chain-transferring agent；Reducing agent accounts for reactant gross mass
0.25%~0.45%, oxidant accounts for reactant gross mass 0.45%~0.6%；With water adjustment polymer concentration 20~60%
Between, room temperature free radical polymerization obtains the sustained release anti-mud polycarboxylate high performance water-reducing agent of cationic.
Water-reducing agent described herein is the application preparation, is detailed in Chinese patent CN105542091A, a kind of sustained release sun
Anti- mud polycarboxylate high performance water-reducing agent of ionic and preparation method thereof.Water-reducing agent guarantee have high water reducing rate under the premise of,
Good slow releasing function can be played, since the ratio real coefficient of the application is higher, moisture needed for concrete is less, and arranging in pairs or groups, this subtracts
Aqua can play better effect.
Preferably, the macromolecule is hydroxyethylmethylcellulose, methylcellulose, polycarbonate, hydroxypropyl
One of methylcellulose and polypropylene phthalein amine are a variety of.
Polymer in whipping process, with the water conservation for uniformly making stirring thing can be dispersed into after the coming into full contact with of water again
Property and cohesive force be significantly improved, the migration resistance for considerably increasing water reduces water to the migration on surface, to make first
The area of the accumulation of salt in the surface soil substantially reduces.There is the microcosmic surface of polymer certain bleed effect to hold one's breath hole, will have after its hardening
There is the action passage for blocking pore, so that some small envelopes can be introduced to greatly reduce the migrating channels of water.These are high
Molecular substance can be used as stable component, reduce sedimentation, prevent bleeding.
Preferably, the cement is selected from PII42.5R cement, it is " common that other indexs of the sand and stone meet JGJ/52
Sand for Concrete, Shi Zhiliang and test method standard " requirement；The miberal powder is S95 grades of miberal powders, meets GB/T18046 and " is used for
Ground granulated blast furnace slag in cement and concrete " requirement, the flyash be II grades of flyash.
Purposes of the concrete in construction material described in -9 any one according to claim 1.
The beneficial effects of the present invention are as follows:
(1) present invention cooperates under certain proportion by volcanic ash and flyash and can achieve better effect, and
It joined a small amount of grey lime, the intensity of concrete can be significantly improved；
(2) seven grades of gradations of sand and stone are devised, the ratio of seven grades of gradations meets described in practice, improve concrete and
Easy property can greatly improve the performance of concrete to improve concrete strength；
(3) present invention combines the gradation of sand and the sand mold of sand, and the two comprehensively considers, and obtains the concrete of better effect
The blend proportion of sand mold and sand gradation；
(4) concrete prepared by the present invention achieves good effect in terms of the working performances such as intensity, pumping, symbol
Standardization requirement, moreover it is possible to reduce production cost.
Specific embodiment
Specific embodiments of the present invention will be further explained below:
The preparation of FT-I type high performance water reducing agent of polyocarboxy acid
First step stock: L-AA 0.75kg and water 156kg are sufficiently stirred and are configured to solution A；Maleic anhydride
12.25kg, hydroxy-ethyl acrylate 29kg, polyethylene glycol maleic acid diester 12.5kg, dimethyl diallyl ammonium chloride
10.10kg, mercaptopropionic acid 0.66kg and water 156kg are sufficiently stirred and are configured to solution B.
Second step polymerization: isobutene alcohol polyoxyethylene is added into the glass reactor with thermometer and electric mixer
Ether 75kg, isoamyl alcohol polyoxyethylene ether 75kg and water 200kg stir to whole dissolutions, 30% hydrogen peroxide are added
1.07kg is stirred evenly, and initial temperature control starts that A, B material is added dropwise between 20~30 DEG C；A drop adds 2h, and B drop adds
Heat preservation 1.5h is added dropwise in 1.5h, finally adjusts solution ph to 6~7 with potassium hydroxide aqueous solution, it is 30% that solid content, which is made,
The anti-mud polycarboxylate high performance water-reducing agent of sustained release cationic.
The preparation of high-quality volcanic ash
(1) volcanic ash raw ore is subjected to ball-milling treatment, Ball-milling Time is no less than 2 hours；
(2) by step (1) handle volcanic ash raw ore be added to the water, obtain ash field mineral water solution, be stirred continuously into
Row is cleaned, and NaOH alkaline conditioner is then added, continues to stir, and dispersing agent is added, and continuing stirring to scouring terminates；
(3) solution obtained after cleaning in step (2) retains screenings through 160-200 mesh, and is centrifuged
Processing retains precipitating, as high-quality volcanic ash after centrifugation.
Embodiment 1 prepares Concrete 1
(1) by the concrete material ready for use of following raw materials according:
400 parts of cementitious material, wherein 200 parts of cement, 100 parts of volcanic ash, 100 parts of flyash, 700 parts of sand, 1000 parts of stone,
150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm, and sand
Gradation be that 5-2.5mm point meter tails over 15.5,2.5-1.25mm points of meters and tails over 8.7,1.25-0.63mm points of meters and tails over 23.6,
0.63-0.315mm point meter, which tails over 28.5,0.315-0.16mm points of meters and tails over 18.2,0.16-0.08mm points of meters, tails over 3.3, sieves bottom
2.2；Sand is river sand, artificial sand mixing, and the grain fineness number modulus is 3.1；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A1, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 2 prepares Concrete 2
(1) by the concrete material ready for use of following raw materials according:
400 parts of cementitious material, wherein 160 parts of cement, 160 parts of volcanic ash, 80 parts of flyash, 650 parts of sand, 1100 parts of stone,
150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm, wherein
The gradation of sand is that 5-2.5mm point meter tails over 14.8,2.5-1.25mm points of meters and tails over 12.6,1.25-0.63mm points of meters and tails over 28.1,
0.63-0.315mm point meter, which tails over 26.5,0.315-0.16mm points of meters and tails over 13.2,0.16-0.08mm points of meters, tails over 3.2, sieves bottom
1.6；Sand is river sand, artificial sand mixing, and the grain fineness number modulus is 3.3；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A2, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 3 prepares Concrete 3
(1) by the concrete material ready for use of following raw materials according:
400 parts of cementitious material, wherein 160 parts of cement, 80 parts of volcanic ash, 160 parts of flyash, 850 parts of sand, 950 parts of stone, water
150 parts, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm, wherein sand
Gradation be that 5-2.5mm point meter tails over 15.1,2.5-1.25mm points of meters and tails over 14.2,1.25-0.63mm points of meters and tails over 17.3,
0.63-0.315mm point meter, which tails over 28.8,0.315-0.16mm points of meters and tails over 19.2,0.16-0.08mm points of meters, tails over 2.4, sieves bottom
3.0；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A3, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 4 prepares Concrete 4
(1) by the concrete material ready for use of following raw materials according:
500 parts of cementitious material, wherein 200 parts of cement, 80 parts of volcanic ash, 220 parts of flyash, 800 parts of sand, 1050 parts of stone,
150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm, wherein
The gradation of sand is that 5-2.5mm point meter tails over 15.1,2.5-1.25mm points of meters and tails over 13.2,1.25-0.63mm points of meters and tails over 16.3,
0.63-0.315mm point meter, which tails over 29.8,0.315-0.16mm points of meters and tails over 21.2,0.16-0.08mm points of meters, tails over 3.4, sieves bottom
1.0；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus is 3.1；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A4, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 5 prepares Concrete 5
(1) by the concrete material ready for use of following raw materials according:
600 parts of cementitious material, wherein 200 parts of cement, 100 parts of volcanic ash, 400 parts of flyash, 800 parts of sand, 1050 parts of stone,
150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm, wherein
The gradation of sand is that 5-2.5mm point meter tails over 14,2.5-1.25mm points of meters and tails over 14,1.25-0.63mm points of meters and tails over 30,0.63-
0.315mm point meter, which tails over 20,0.315-0.16mm points of meters and tails over 17,0.16-0.08mm points of meters, tails over 3, sieves bottom 2；Sand be river sand,
Artificial sand mixing is calculated according to formula it is found that the grain fineness number modulus is 3.3.
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A5, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 6 prepares Concrete 6
(1) by the concrete material ready for use of following raw materials according:
500 parts of cementitious material, wherein 200 parts of cement, 100 parts of volcanic ash, 150 parts of flyash, 50 parts of agstone, sand
800 parts, 1050 parts of stone, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, the polycarbonate that filament diameter is 18 μm
0.4 part of fiber, wherein the gradation of sand tails over 15.4,2.5-1.25mm points of meters for 5-2.5mm points of meters and tails over 14.6,1.25-
0.63mm point meter, which tails over 18.6,0.63-0.315mm points of meters and tails over 22.4,0.315-0.16mm points of meters, tails over 23.6,0.16-
0.08mm points of meters tail over 3.1, sieve bottom 2.3；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus
It is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A6, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 7 prepares Concrete 7
(1) by the concrete material ready for use of following raw materials according:
500 parts of cementitious material, wherein 200 parts of cement, 100 parts of volcanic ash, 175 parts of flyash, 25 parts of agstone, sand
800 parts, 1050 parts of stone, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, the polycarbonate that filament diameter is 18 μm
0.4 part of fiber, wherein the gradation of sand tails over 13.5,2.5-1.25mm points of meters for 5-2.5mm points of meters and tails over 12.8,1.25-
0.63mm point meter, which tails over 26.8,0.63-0.315mm points of meters and tails over 19.4,0.315-0.16mm points of meters, tails over 21.4,0.16-
0.08mm points of meters tail over 4.2, sieve bottom 1.9；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus
It is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A7, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 8 prepares Concrete 8
(1) by the concrete material ready for use of following raw materials according:
420 parts of cementitious material, wherein 160 parts of cement, 80 parts of volcanic ash, 160 parts of flyash, 20 parts of agstone, sand 800
Part, 1050 parts of stone, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, the polycarbonate that filament diameter is 18 μm are fine
0.4 part of dimension, wherein the gradation of sand is that 5-2.5mm point meter tails over 14.4,2.5-1.25mm points of meters and tails over 9.8,1.25-0.63mm points
Meter, which tails over 29.1,0.63-0.315mm point meter and tails over 20.6,0.315-0.16mm points of meters, tails over 19.7,0.16-0.08mm points of meters
4.6 are tailed over, bottom 1.8 is sieved；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A3, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 9 prepares Concrete 9
(1) by the concrete material ready for use of following raw materials according:
550 parts of cementitious material, wherein 200 parts of cement, 90 parts of volcanic ash, 220 parts of flyash, 40 parts of agstone, sand 800
Part, 1050 parts of stone, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, the polycarbonate that filament diameter is 18 μm are fine
0.4 part of dimension, wherein the gradation of sand tails over 15.8,2.5-1.25mm points of meters for 5-2.5mm points of meters and tails over 10.6,1.25-0.63mm
Point meter, which tails over 28.4,0.63-0.315mm point meter and tails over 19.7,0.315-0.16mm points of meters, tails over 19.4,0.16-0.08mm points
Meter tails over 3.9, sieves bottom 2.2；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A9, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 10 prepares Concrete 10
(1) by the concrete material ready for use of following raw materials according:
600 parts of cementitious material, wherein 150 parts of cement, 100 parts of volcanic ash, 400 parts of flyash, 50 parts of agstone, sand
800 parts, 1050 parts of stone, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, the polycarbonate that filament diameter is 18 μm
0.4 part of fiber, wherein the gradation of sand tails over 13.8,2.5-1.25mm points of meters for 5-2.5mm points of meters and tails over 14.7,1.25-
0.63mm point meter, which tails over 26.4,0.63-0.315mm points of meters and tails over 20.6,0.315-0.16mm points of meters, tails over 18.4,0.16-
0.08mm points of meters tail over 4.6, sieve bottom 1.5；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus
It is 3.3；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as A10, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Comparative example B1
(1) by the concrete material ready for use of following raw materials according:
500 parts of cementitious material, wherein 200 parts of cement, 300 parts of flyash, 800 parts of sand, 1050 parts of stone, 150 parts of water, FT-I
1.6 parts of type high performance water reducing agent of polyocarboxy acid, filament diameter is 0.4 part of polycarbonate of 18 μm, and wherein the gradation of sand is 5-
2.5mm point meter, which tails over 14.8,2.5-1.25mm points of meters and tails over 12.6,1.25-0.63mm points of meters, tails over 28.1,0.63-0.315mm
Point meter, which tails over 26.5,0.315-0.16mm point meter and tails over 13.2,0.16-0.08mm points of meters, tails over 3.2, sieves bottom 1.6；Sand is river
Sand, artificial sand mixing, the grain fineness number modulus are 3.3；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as B1, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Comparative example B2
(1) by the concrete material ready for use of following raw materials according:
500 parts of cementitious material, wherein 250 parts of cement, 200 parts of flyash, 50 parts of agstone, 800 parts of sand, stone 1050
Part, 150 parts of water, 1.6 parts of FT-I type high performance water reducing agent of polyocarboxy acid, filament diameter are 0.4 part of polycarbonate of 18 μm,
The gradation of middle sand is that 5-2.5mm point meter tails over 15.4,2.5-1.25mm points of meters and tails over 14.6,1.25-0.63mm points of meters and tails over
18.6,0.63-0.315mm points of meters, which tail over 22.4,0.315-0.16mm points of meters and tail over 23.6,0.16-0.08mm points of meters, to be tailed over
3.1, sieve bottom 2.3；Sand is river sand, artificial sand mixing, is calculated according to formula it is found that the grain fineness number modulus is 3.2；
(2) additive is added to the water and is uniformly mixing to obtain additive mixed liquor, sand, stone are put into blender, outside 3/4
Add agent mixed liquor to stir 1min, then put into cement, miberal powder, flyash, 1/4 additive mixed liquor, continues to stir 3min, by coagulation
Native mix is fitted into preprepared die trial for two layers with scuppit point, and every layer of charging thickness is roughly equal；
(3) molding concrete is taken out, is labeled as B2, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
The result of table 1 each embodiment and comparative examples
Test result is arranged, obtain each embodiment of table 1 and comparative examples as a result, as shown in Table 1, the present embodiment
The index tests such as the workability of A1-A10,28 days compression strength are less able to satisfy engineering practice, volcano with the result difference of B1
The collocation of ash and flyash can play preferable effect, and A1-A4 and A6-A9 meet the flyash and the weight ratio of volcanic ash is
1-2:1-3, effect are excellent compared to A5, A10；And A1-A4 does not add grey lime, intensity is weaker compared to A6-A9, illustrates grey lime energy
Enough enhance the activity of volcanic ash.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of enhanced flyash, trass concrete, which is characterized in that according to poidometer, including cementitious material 300-500
Part, 650-850 parts of sand, 950-1100 parts of stones, 100-200 parts of water and 1-5 parts of additives, the cementitious material include 40-
60% cement, 20-50% flyash, 20-40% volcanic ash.
2. concrete according to claim 1, which is characterized in that the weight ratio of the flyash and volcanic ash is (1-2):
(1-3)。
3. concrete according to claim 1, which is characterized in that the cementitious material further includes agstone, by weight
Meter, 40-60% cement, 10-50% flyash, 20-40% volcanic ash, agstone 5-10%.
4. concrete according to claim 1-3, which is characterized in that the volcanic ash refers to volcanic ash raw ore
Through obtained by following processing:
(1) volcanic ash raw ore is subjected to ball-milling treatment, Ball-milling Time is no less than 2 hours；
(2) the volcanic ash raw ore that step (1) is handled is added to the water, obtains ash field mineral water solution, is stirred continuously and is wiped
It washes, alkaline conditioner is then added, continue to stir, dispersing agent is added, continuing stirring to scouring terminates；
(3) solution obtained after cleaning in step (2) retains screenings through 160-200 mesh, and carries out at centrifugation
Reason retains precipitating, as high-quality volcanic ash after centrifugation.
5. according to the described in any item concrete of claim 4, which is characterized in that the gradation of the sand is as follows: 5-2.5mm points of meters
Tail over 10-16%；2.5-1.25mm points of meters tail over 8-15%；1.25-0.63mm a point meter tails over 15-30%；0.63-0.315mm
Meter is divided to tail over 10-30%；0.315-0.16mm points of meters tail over 10-30%；0.16-0.08mm points of meters tail over 3-15%；Sieve bottom 1-
3%；The sand is one of river sand, artificial sand or mixture, and the grain fineness number modulus is 3.1-3.7.
6. concrete according to claim 5, which is characterized in that the additive includes water-reducing agent, high molecular polymer
Reinforcing agent.
7. concrete according to claim 6, which is characterized in that the water-reducing agent is FT-I type poly-carboxylic high-performance diminishing
Agent is made according to following raw material weight ratio graft copolymerization: 2~4 parts of unsaturated carboxylic acid, 3.5~5 parts of beta-unsaturated esters, and crosslinking agent
0.3~0.7 part, 0.5-1.5 parts of polyether macromonomer, 0.5~1.5 part of cationic unsaturated monomer, chain-transferring agent 0.07~0.15
Part；Reducing agent accounts for the 0.25%~0.45% of reactant gross mass, and oxidant accounts for reactant gross mass 0.45%~0.6%；With
Water adjusts polymer concentration between 20~60%, and room temperature free radical polymerization obtains the sustained release high property of the anti-mud polycarboxylic-acid of cationic
It can water-reducing agent.
8. concrete according to claim 6, which is characterized in that the macromolecule is hydroxyethylmethylcellulose, methyl
One of cellulose, polycarbonate, hydroxypropyl methyl cellulose and polypropylene phthalein amine are a variety of.
9. strong concrete according to claim 1-8, it is characterised in that: the cement is selected from
Other indexs of P.II42.5R cement, the sand and stone meet JGJ/52 " regular concrete sand, Shi Zhiliang and the method for inspection
Standard " requirement；The miberal powder is S95 grades of miberal powders, meets GB/T18046 " for the granulated blast-furnace mine in cement and concrete
Ground-slag " requirement, the flyash be II grades of flyash.
10. purposes of the concrete in construction material described in -9 any one according to claim 1.
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| CN111592283A (en) * | 2020-04-21 | 2020-08-28 | 河南恒发建筑材料有限公司 | Commercial concrete and preparation process thereof |
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