CN109400077A - A kind of strong concrete by improving the preparation of fine aggregate gradation - Google Patents
A kind of strong concrete by improving the preparation of fine aggregate gradation Download PDFInfo
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- CN109400077A CN109400077A CN201811608368.0A CN201811608368A CN109400077A CN 109400077 A CN109400077 A CN 109400077A CN 201811608368 A CN201811608368 A CN 201811608368A CN 109400077 A CN109400077 A CN 109400077A
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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
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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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Abstract
The present invention is a kind of strong concrete by improving the preparation of fine aggregate gradation, raw material including following parts by weight: 100-200 parts of cement, 40-100 parts of miberal powder, 40-100 parts of flyash, 600-1000 parts of sand, 100-200 parts of water, 1-5 parts of additive, the gradation of the sand is as follows: 5-2.5mm points of meters tail over 1-30%；2.5-1.25mm points of meters tail over 1-30%；1.25-0.63mm a point meter tails over 10-40%；0.63-0.315mm points of meters tail over 10-40%；0.315-0.16mm points of meters tail over 5-20%；0.16-0.08mm points of meters tail over 2-30%；Sieve bottom 0-3%.The present invention devises seven grades of gradations of sand, and the ratio of seven grades of gradations meets practice, improves concrete workability to improve concrete strength, can greatly improve the performance of concrete；In conjunction with the gradation of sand and the sand mold of sand, the two comprehensively considers, and obtains the concrete sand mold of better effect and the blend proportion of sand gradation, moreover it is possible to reduce production cost.
Description
Technical field
The present invention relates to building material technical fields for this, more particularly to a kind of height by improving the preparation of fine aggregate gradation
Strength concrete.
Background technique
Aggregate is the important component of commerical ready-mixed concrete, and quality accounts for 70% or more of concrete gross mass.Aggregate grade
With being exactly the proportionate relationship for forming the different-grain diameter particle of aggregate；Grading of aggregates is broadly divided into continuous grading and gap grading is (single
Grade), continuous grading refers mainly in maximum particle diameter to be interrupted, to can sufficiently fill out hereinafter, sequentially there is other corresponding grades
Fill the gap between aggregate.Gap grading refers to lacks wherein level-one or grade among what in continuous grading.China's coagulation at present
The aggregate that native industry largely uses is mostly calcium carbonate rock, and the partial size of aggregate is unstable, gradation cooperation it is poor, and elongated particles compared with
More, voidage is big, Gao Zheda 53%, with such aggregate configure concrete, it is necessary to multi-purpose cement slurry could to concrete and easily
Property make moderate progress, otherwise can make concrete that required workability be not achieved after agitation, workability is poor, be easy bleeding, collapse
Degree of falling loss influences the intensity and other performances of concrete than more serious.
CN 107721314B provides a kind of ready-mixed concrete containing seven graded aggregates, the original including following parts by weight
Material: 200-300 parts of cement, 0-40 parts of slag powders, 0-60 parts of agstone, 100-320 parts of river sand, 0-300 parts of artificial sand, mechanism
0-300 parts, 10-20mm grades 500-800 parts of rubbles of 300-600 parts, 4-8mm grades of sand 100-200 parts, 8-15mm grades of rubble rubble,
10-30mm grades of 0-250 parts of rubbles, 3-8 parts of water-reducing agent, 150-190 parts of water；The fineness modulus of the river sand is described in 0.8-1.2
The fineness modulus of artificial sand is 1.8-2.2, and the fineness modulus of the Machine-made Sand is 2.6-3.1.This application is by the aggregate of concrete
Gradation distinguishes and reasonably combined, so that the ready-mixed concrete compactness of mixing is more preferable, improves concrete workability, however,
What the technical solution solved is the gradation of coarse aggregate, is not related to fine aggregate.
Aggregate is the bulk material that skeleton and filling effect are played in concrete and mortar, there is fine aggregate and two kinds of coarse aggregate.
Fine aggregate is a kind of relatively small aggregate of diameter, it is generally recognized that sand, coarse aggregate diameter is relatively large, is typically considered stone
Son.Present invention applicant, which furthers investigate aggregate gradation and high performance concrete, influences the two of aggregate quality by years of researches
Big factor gradation and grain shape, can analyze from voidage and total surface area, and voidage can be asked by aggregate bulk density
?.For aggregate, its specific surface area can be effectively still measured without any instrument, needs a kind of reliable alternative
Method, and a kind of reasonable Size-Distribution of Concrete Aggregates ratio is obtained by this method, the quality of aggregate is promoted, and then promote mixed
The intensity for coagulating soil, obtains the concrete of high quality.
In conclusion the prior art still lacks suitable Size-Distribution of Concrete Aggregates ratio, the drop of concrete strength is improved
The production cost of low concrete.
Summary of the invention
As previously mentioned, being improved to the aggregate of concrete, section the purpose of the present invention is on the deficiencies in the prior art
It learns ground to distinguish the grading of aggregates of concrete and reasonably combined, so that the ready-mixed concrete compactness of mixing is more preferable, improve
Concrete workability in the case where proof strength requires, can effectively reduce cost of material, be made to improve concrete strength
Ready-mixed concrete good effect is achieved in terms of the working performances such as intensity, pumping.Technical solution of the present invention is such as
Under.
A kind of strong concrete by improving the preparation of fine aggregate gradation, the raw material including following parts by weight: cement
100-200 parts, 40-100 parts of miberal powder, 40-100 parts of flyash, 600-1000 parts of sand, 100-200 parts of water, 1-5 parts of additive, stone
It is 950-1050 parts sub-,
The gradation of the sand is as follows:
10-5mm points of meters tail over 5-20%
5-2.5mm points of meters tail over 1-30%；
2.5-1.25mm points of meters tail over 1-30%；
1.25-0.63mm a point meter tails over 10-40%；
0.63-0.315mm points of meters tail over 10-40%；
0.315-0.16mm points of meters tail over 5-20%；
0.16-0.08mm points of meters tail over 2-30%；
Sieve bottom 0-3%.
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.
Present invention applicant devises seven grades of gradations of sand, by experimental data it is found that suitable gradation directly affects
The ratio real coefficient of sand, is capable of providing and gives concrete suitable mobility, due to having continuity and sand during concrete production
The property complicated and changeable of subcase, if as scientific experiment every time accurately carry out gradation collocation, be it is unpractical, because
This, it is thus necessary to determine that the gradation of the sand of proper ratio range, as long as the fine aggregate of the concrete produced every time meets this range,
It can obtain suitably than real coefficient and mobility, meanwhile, the voidage for reducing aggregate can increase the closely knit of system, can subtract
The dosage of few water, further increases the intensity of concrete.
By preceding described, present invention applicant devises seven grades of gradations of sand, seven grades of grades in a series of basis of practices
For sand in the range of matching than real coefficient between 10-18, the concrete flowability of acquisition is relatively preferable, maximally reduces
The voidage and specific surface area of aggregate can effectively increase slurry more than needed, can be effectively improved by improvement fine aggregate gradation mixed
The intensity for coagulating soil, is conducive to the raising of working performance of concrete.
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 big sand of particle is relatively more, more relatively large than real coefficient, 14-16 or so, is not higher than 16, and mobility is suitable,
Preferably, 10-5mm point meter, which tails over 11.3,5-2.5mm points of meters and tails over 15.1,2.5-1.25mm points of meters, tails over 13.2,1.25-
0.63mm point meter, which tails over 16.3,0.63-0.315mm points of meters and tails over 18.5,0.315-0.16mm points of meters, tails over 21.2,0.16-
0.08mm points of meters tail over 3.4, sieve bottom 1.0.
Preferably, the gradation of the sand is as follows:
5-2.5mm points of meters tail over 5-15%；
2.5-1.25mm points of meters tail over 5-20%；
1.25-0.63mm a point meter tails over 25-40%；
0.63-0.315mm points of meters tail over 20-40%；
0.315-0.16mm points of meters tail over 10-20%；
0.16-0.08mm points of meters tail over 10-30%；
Sieve bottom 1-3%.
The small sand of particle is relatively more, more relatively small than real coefficient, 10-12 or so, and mobility is relatively high.Preferably,
10-5mm point meter, which tails over 2.5,5-2.5mm points of meters and tails over 9.5,2.5-1.25mm points of meters, tails over 17.4,1.25-0.63mm points of meter sieves
18.6,0.63-0.315mm of remaininging point meter, which tails over 38.0,0.315-0.16mm points of meters and tails over 9.4,0.16-0.08mm points of meters, to be tailed over
3.5, sieve bottom 1.0.
Preferably, the sand is one of river sand, artificial sand or mixture, the grain fineness number modulus is 3.1-
3.7。
Fineness 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.
The application further study show that, not only gradation can influence the performance of concrete, and sand mold can also influence coagulation
The influence of soil, the two comprehensively consider better effect.
It preferably, the sand is artificial sand, and is sand in the area II, the grain fineness number modulus is 2.3-3.0.Than real system
It when number is lower than 12, selects artificial sand effect more preferable, selects sand in the area II, can prevent from isolating.
Preferably, including the raw material of following parts by weight: 150-160 parts of cement, 60-80 parts of miberal powder, flyash 60-80
Part, 800-850 parts of sand, 140-160 parts of water, 1000-1050 parts of stone, 1-2 parts of additive.
Preferably, 160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, outside
Add 1.6 parts of agent.More preferably concrete is arranged in pairs or groups, and can play better effect.
Preferably, the additive 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 cement is selected from PII42.5R cement, other indexs of the sand meet JGJ/52 " common coagulation
Native sand, Shi Zhiliang and test method standard " requirement；The miberal powder is S95 grades of miberal powders, meets GB/T18046 " for cement
With the ground granulated blast furnace slag in 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) seven grades of gradations of sand are devised, the ratio of seven grades of gradations meets described in practice, improve concrete workability from
And concrete strength is improved, the performance of concrete can be greatly improved；
(2) 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；
(3) 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
Prepare embodiment
In the application, the cement is selected from PII42.5R cement, and it is " general that other indexs of the sand meet JGJ/52-2006
Logical Sand for Concrete, Shi Zhiliang and test method standard " requirement；The miberal powder is S95 grades of miberal powders, meets GB/T18046 and " uses
Ground granulated blast furnace slag in cement and concrete " requirement, the flyash be II grades of flyash.The additive is
FT-I type high performance water reducing agent of polyocarboxy acid is made according to following raw material weight ratio graft copolymerization: 2~4 parts of unsaturated carboxylic acid, no
3.5~5 parts of saturated ester, 0.3~0.7 part of crosslinking agent, 0.5-1.5 parts of polyether macromonomer, cationic unsaturated monomer 0.5~1.5
Part, 0.07~0.15 part of chain-transferring agent；Reducing agent accounts for the 0.25%~0.45% of reactant gross mass, and it is total that oxidant accounts for reactant
Quality 0.45%~0.6%；With water adjustment polymer concentration between 20~60%, room temperature free radical polymerization obtain sustained release sun from
The anti-mud polycarboxylate high performance water-reducing agent of subtype.
River sand is the river sand of market purchase, and artificial sand is the artificial sand produced using ball mill, particle shape, fineness modulus and grade
With adjustable.
Embodiment 1
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
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 points of meters, which tail over 29.8,0.315-0.16mm points of meters and tail over 21.2,0.16-0.08mm points of meters, to be tailed over
3.4, sieve 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 A1, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 2
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
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 is
River sand, artificial sand mixing, calculate 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 A2, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 3
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
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 14.2,1.25-0.63mm points of meters and tails over
17.3,0.63-0.315mm points of meters, which tail over 28.8,0.315-0.16mm points of meters and tail over 19.2,0.16-0.08mm points of meters, to be tailed over
2.4, sieve 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
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
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 points of meters, which tail over 26.5,0.315-0.16mm points of meters and tail over 13.2,0.16-0.08mm points of meters, to be tailed over
3.2, sieve 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 A4, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 5
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein 5-2.5mm point meter, which tails over 15.5,2.5-1.25mm points of meters and tails over 8.7,1.25-0.63mm points of meters, 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 A5, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 6
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is that 5-2.5mm point meter tails over 5.0,2.5-1.25mm points of meters and tails over 5.0,1.25-0.63mm points of meters and tails over
25.0,0.63-0.315mm points of meters, which tail over 20.0,0.315-0.16mm points of meters and tail over 13.0,0.16-0.08mm points of meters, to be tailed over
30.0, sieve bottom 2.0；Sand is artificial sand, and the grain fineness number modulus is 2.5；
(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
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is that 5-2.5mm point meter tails over 6.8,2.5-1.25mm points of meters and tails over 9.5,1.25-0.63mm points of meters and tails over
28.9,0.63-0.315mm points of meters, which tail over 22.5,0.315-0.16mm points of meters and tail over 11.5,0.16-0.08mm points of meters, to be tailed over
18.5, sieve bottom 2.3；Sand is artificial sand, and the grain fineness number modulus is 2.9；
(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
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is that 5-2.5mm point meter tails over 6.2,2.5-1.25mm points of meters and tails over 9.3,1.25-0.63mm points of meters and tails over
24.8,0.63-0.315mm points of meters, which tail over 22.4,0.315-0.16mm points of meters and tail over 11.5,0.16-0.08mm points of meters, to be tailed over
24.6, sieve bottom 1.2；Sand is artificial sand, and the grain fineness number modulus is 2.8；
(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 A8, carry out pumping pressure test, and concrete formation after 28 days
After measure compression strength.
Embodiment 9
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is that 5-2.5mm point meter tails over 7.4,2.5-1.25mm points of meters and tails over 8.1,1.25-0.63mm points of meters and tails over
26.8,0.63-0.315mm points of meters tail over 25.4., and 0.315-0.16mm points of meters tail over 10.5,0.16-0.08mm points of meters and tail over
20.6, sieve bottom 1.2；Sand is artificial sand, and the grain fineness number modulus is 2.9；
(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
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is that 5-2.5mm point meter tails over 5.5,2.5-1.25mm points of meters and tails over 8.6,1.25-0.63mm points of meters and tails over
30.4,0.63-0.315mm points of meters, which tail over 22.4,0.315-0.16mm points of meters and tail over 13.2,0.16-0.08mm points of meters, to be tailed over
17.4, sieve bottom 2.5；Sand is artificial sand, and the grain fineness number modulus is 2.9；
(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 1
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is 4 grades, and specially 2.5-0.63mm points of meters tail over 43.8,0.63-0.315mm points of meters and tail over 12.8,
0.315-0.08mm points of meters tail over 6.4, sieve bottom 0.2；Sand is that artificial sand sand is river sand, artificial sand mixing.
(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 2
(1) by the concrete material ready for use of following raw materials according:
160 parts of cement, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive,
Wherein the gradation of sand is 4 grades, and specific 2.5-0.63mm points of meters tail over 33.5,0.63-0.315mm points of meters and tail over 36.1,0.315-
0.08mm points of meters tail over 9.4, sieve bottom 2.6；Sand is artificial sand.
(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 comparison table of table 9 each embodiment and comparative examples
By the data analysis of table 9 it is found that passing through the workability of each embodiment of comparison, 28 days compression strength, pumping pressures etc.
Index, the pumping pressure of A1-A10 is greater than B1-B2 group, and 28 days compression strength is better than B1-B2 group, and the present invention significantly improves mixed
Solidifying soil workability, reduces pumping pressure and improves 28 days compression strength.The sand of A1-A5 group big constituent content relatively
More, the fineness modulus of sand is compared to larger, and 100 meters of pumping pressures of A1-A5 group are greater than A6-A10 group, but 28 days compression strength is better than
A6-A10 group illustrates that sand mold is larger to the intensity effect of concrete.A1 group is better than A2, A3, A4, A5 group, and the result of A1 group is more
Outstanding, A6 group is better than A7, A8, A9, A10 group, and the result of A6 group is more outstanding, and A1 and A6 are the excellent selection of religion.
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 strong concrete by improving the preparation of fine aggregate gradation, which is characterized in that the original including following parts by weight
Material: 100-200 parts of cement, 40-100 parts of miberal powder, 40-100 parts of flyash, 600-1000 parts of sand, 100-200 parts of water, additive
1-5 parts, 950-1050 parts of stone,
The gradation of the sand is as follows:
5-2.5mm points of meters tail over 1-30%；
2.5-1.25mm points of meters tail over 1-30%；
1.25-0.63mm a point meter tails over 10-40%；
0.63-0.315mm points of meters tail over 10-40%；
0.315-0.16mm points of meters tail over 5-20%；
0.16-0.08mm points of meters tail over 2-30%；
Sieve bottom 0-3%.
2. strong concrete according to claim 1, 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 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%.
3. strong concrete according to claim 1, which is characterized in that the gradation of the sand is as follows:
5-2.5mm points of meters tail over 5-15%；
2.5-1.25mm points of meters tail over 5-20%；
1.25-0.63mm a point meter tails over 25-40%；
0.63-0.315mm points of meters tail over 20-40%；
0.315-0.16mm points of meters tail over 10-20%；
0.16-0.08mm points of meters tail over 10-30%；
Sieve bottom 1-3%.
4. strong concrete according to claim 1 or 2, which is characterized in that the sand is river sand, one in artificial sand
Kind or mixture, the grain fineness number modulus are 3.1-3.7.
5. strong concrete according to claim 3, which is characterized in that the sand is artificial sand, and is in the area II
Sand, the grain fineness number modulus are 2.3-3.0.
6. strong concrete according to claim 1-5, which is characterized in that the original including following parts by weight
Material: 150-160 parts of cement, 60-80 parts of miberal powder, 60-80 parts of flyash, 800-850 parts of sand, 140-160 parts of water, stone 1000-
1050 parts, 1-2 parts of additive.
7. strong concrete according to claim 5, which is characterized in that the raw material including following parts by weight: cement 160
Part, 80 parts of miberal powder, 80 parts of flyash, 810 parts of sand, 150 parts of water, 1050 parts of stone, 1.6 parts of additive.
8. strong concrete according to claim 5, which is characterized in that the additive is the high property of FT-I type polycarboxylic acids
Energy water-reducing 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,
0.3~0.7 part of crosslinking agent, 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, oxidant account for reactant gross mass 0.45%~
0.6%；With water adjustment polymer concentration between 20~60%, room temperature free radical polymerization obtains the sustained release poly- carboxylic of the anti-mud of cationic
Sour series high-performance dehydragent.
9. strong concrete according to claim 1-8, it is characterised in that: the cement is selected from PII42.5R
Cement, other indexs of the sand meet the requirement of JGJ/52 " regular concrete sand, Shi Zhiliang and test method standard "；Institute
Stating miberal powder is S95 grades of miberal powders, meets the requirement of GB/T18046 " for the ground granulated blast furnace slag in cement and concrete ", institute
Stating flyash is 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110502854A (en) * | 2019-08-28 | 2019-11-26 | 北京市中超混凝土有限责任公司 | A kind of preparation method of alternate resources concrete |
| CN115446985A (en) * | 2022-09-05 | 2022-12-09 | 中交三航(南通)海洋工程有限公司 | Adjustable and controllable concrete sand thickness and gradation optimization method |
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| CN105542091A (en) * | 2015-12-16 | 2016-05-04 | 广东复特新型材料科技有限公司 | Slow-release cationic anti-mud polycarboxylic-type high performance water reducer and preparation method thereof |
| CN107721314A (en) * | 2017-11-10 | 2018-02-23 | 重庆富皇建筑工业化制品有限公司 | A kind of ready-mixed concrete containing seven graded aggregates and application thereof |
| CN110502854A (en) * | 2019-08-28 | 2019-11-26 | 北京市中超混凝土有限责任公司 | A kind of preparation method of alternate resources concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105542091A (en) * | 2015-12-16 | 2016-05-04 | 广东复特新型材料科技有限公司 | Slow-release cationic anti-mud polycarboxylic-type high performance water reducer and preparation method thereof |
| CN107721314A (en) * | 2017-11-10 | 2018-02-23 | 重庆富皇建筑工业化制品有限公司 | A kind of ready-mixed concrete containing seven graded aggregates and application thereof |
| CN110502854A (en) * | 2019-08-28 | 2019-11-26 | 北京市中超混凝土有限责任公司 | A kind of preparation method of alternate resources concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110502854A (en) * | 2019-08-28 | 2019-11-26 | 北京市中超混凝土有限责任公司 | A kind of preparation method of alternate resources concrete |
| CN110502854B (en) * | 2019-08-28 | 2023-05-05 | 北京市中超混凝土有限责任公司 | Preparation method of concrete for replacing resources |
| CN115446985A (en) * | 2022-09-05 | 2022-12-09 | 中交三航(南通)海洋工程有限公司 | Adjustable and controllable concrete sand thickness and gradation optimization method |
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Application publication date: 20190301 |