CN108793895A - A kind of concrete with high cracking resistance - Google Patents
A kind of concrete with high cracking resistance Download PDFInfo
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- CN108793895A CN108793895A CN201810976616.0A CN201810976616A CN108793895A CN 108793895 A CN108793895 A CN 108793895A CN 201810976616 A CN201810976616 A CN 201810976616A CN 108793895 A CN108793895 A CN 108793895A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of concrete with high cracking resistance, belong to building material field, in terms of parts by weight, including 205-279 parts of cement, 380-440 parts of sand, 627-854 parts of rubble, 57-78 parts of flyash, 10-15 parts of spherical glass powder, 89-105 parts of miberal powder, 0.56-2.71 parts of water-reducing agent, 1.35-1.88 parts of swelling agent, 10-15 parts of modified polypropylene fiber, 3-5 parts of coupling agent of compounding, 15-20 parts of zeolite powder, 146-190 parts of water.It is with high-impermeable, crack resistance and durability, the advantages of being suitable for the concreting of large volume super-long structural.
Description
Technical field
The present invention relates to building material fields, more specifically, it is related to a kind of concrete with high cracking resistance.
Background technology
Concrete, referred to as concrete are to be used the general designation for the cementing integral engineered composite material that gathers materials by cementitious material
For cement as cementitious material, sand, masonry are to gather materials, and can by a certain percentage be coordinated with water, additive etc., agitated and obtain, extensively
Applied to civil engineering.
In recent years, with the economic sustained and rapid development in China, the infrastructure construction dynamics and scale in China are also continuous
It increases, the application of concrete component is also more and more.It is tension reinforcing steel bar as early as possible in concrete component production, accelerates template turnover
With pedestal utilization rate, and accelerate engineering construction progress and to complete as early as possible, realizes maximum economic benefit.
High performance concrete is quickly grown nearly ten years, is increasingly paid attention to by international project circle, and more and more
Construction applied to Important Project.Generally six component concrete (are referred to admixture and plasticiser are more, mixed using " more than two two is few "
Heshui and cement are few) technology prepare, although this concrete in terms of intensity, workability and certain durabilities have it is excellent
Performance, but its preparation measure is set not for cracking of reinforced concrete deficiency, thus in volume stability and crack resistance side
Still deficiency is improved in face.Some high performance concrete formulas also make due to activity of cement height and gel material content are big etc.
It is excessive to obtain concrete shrinkage, rigidity is excessively high, and viscoplasticity is too small, to there is the tendency of cracking.Distress in concrete not only influences to tie
The appearance of structure is especially a huge harm to impermeability, to injure safety and the durability of structure.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of concrete of high cracking resistance, have
High-impermeable, crack resistance and durability, the advantages of being suitable for the concreting of large volume super-long structural.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of concrete with high cracking resistance, in terms of parts by weight, including 205-279 parts of cement, 380-440 parts of sand, rubble 627-854
Part, 57-78 parts of flyash, 10-15 parts of spherical glass powder, 89-105 parts of miberal powder, 0.56-2.71 parts of water-reducing agent, swelling agent 1.35-
1.88 parts, 10-15 parts of modified polypropylene fiber, compounding 3-5 parts of coupling agent, 15-20 parts of zeolite powder, 146-190 parts of water.
Preferably, the modified polypropylene fiber is prepared by following methods：
(1) graft modification：Polypropylene fibre carries out 60Co- gamma-rays pre-irradiations in acrylic acid solution；
(2) decentralized processing：The polypropylene fibre of step (1) is impregnated into 30-60min in absolute ethyl alcohol, it is then clear in ultrasonic wave
It washes and cleans 20-30min in device, 3-4h is dried in vacuum drying oven；
(3) secondary grafting is modified:The polypropylene fibre of step (2) is impregnated into 4-5h in acrylic acid solution, later, in inertia atmosphere
It encloses, carry out corona treatment, processing time 3-15min under conditions of pressure 20Pa, voltage are 500V；
(4) it washs and dry：The polypropylene fibre of step (3) is washed and is drying to obtain modified polypropylene fiber.
By using modified polypropylene fiber made from corona treatment modified polypropylene fiber grafted propylene acid, parent
Water better performances, tensile strength is higher, it is acrylic acid modified after polypropylene fibre average tensile strength be 192MPa.
Preferably, the compounding coupling agent is by including 1-2 parts of the polymethyl siloxane in terms of parts by weight, three second of phenyl
0.2-0.5 parts of oxysilane, 0.4-0.88 parts of lauric acid diethyl amide, 2-4 parts of propylene glycol, 0.01-0.05 parts of hydrochloric acid, water
3.2-6.4 parts of mixture carries out sol gel reaction and is made.
Preferably, the condition of the sol gel reaction is：Sequentially add in a kettle dimethyl silicone polymer,
Phenyl triethoxysilane, lauric acid diethyl amide, propylene glycol, hydrochloric acid and water, the stirring point under 30-60 DEG C of isoperibol
It dissipates, mixing speed 2000-2800rpm, mixing time 18-24h.
By using the compounding coupling agent of the present invention, the compatibility of swelling agent and modified polypropylene fiber system is improved,
The adhesion strength with cement-based material is enhanced, meanwhile, the concrete structure with the compounding coupling agent treatment of the present invention is fine and close, has
Excellent corrosion resistance.
Preferably, the miberal powder is S105 grades of ground granulated blast furnace slags, and specific surface area 525cm2/g, fluidity ratio is 106%,
Specific activity index 7d is 95%, 28d 115%.
By using ground granulated blast furnace slag, improve pore structure and intensity after concrete hardening, and since ore powder granularity is higher,
Cement particle surface can be adsorbed on so that the Flocculated Cement structure being likely to form originally can not be formed, and similar water-reducing agent is played
Effect, in the identical flowing velocity that can significantly improve concrete mix of water consumption, improves its mobile performance, and right
The early stage pore structure for improving concrete has certain effect, and is conducive to the durability for improving concrete.
Preferably, the flyash is global shape, and grain size is continuously distributed and grain size≤3 μm, water demand ratio are not more than
95%.
By using global shape and the continuously distributed flyash of grain size, with cement granules in microcosmic upper formation grading system,
The sand that cooperation is added is as gathering materials, it is ensured that there is preferable intensive after concrete curing, improve the intensity of concrete with
It satisfies the use demand, the collective effect with spherical glass powder spike, water-reducing effect is notable, and water requirement substantially reduces；Consider simultaneously
Flyash spike has " active effect ", " interfacial effect " and " diminishing effect ", and the dual coupling with water-reducing agent also helps
In the later strength for improving high crack-resisting.
Preferably, the water-reducing agent is naphthalene series high-efficiency water-reducing agent, and sodium sulphate content is less than 8%, and chloride ion content is less than
0.1%.
Preferably, the cement is 42.5R grades of Portland cements.
By select 42.5R grade Portland cements make made from concrete with some strength while with compared with
The low heat of hydration, in cement hydration process, the heat of generation is less so that the internal-external temperature difference of concrete is smaller, reduces crack
Generation.
Preferably, it is 5 that the sand, which includes weight ratio,:The sand of the sand and 40-70 mesh of 3 20-40 mesh, the sand are water
Wash drying river sand.
Preferably, it is 3 that the rubble, which includes mass ratio,:The rubble and particle size range that 7 particle size range is 0-5mm are 6-
The mould degree of counting accurately of the rubble of 20mm, rubble is 1.5.
Made by selecting the washing of different-grain diameter range to dry river sand and rubble, mixture when being prepared as concrete
The gap obtained between concrete can be filled, and anti-crack concrete structure obtained is closely knit, and intensity is higher.
In conclusion the invention has the advantages that：
The first, the collective effect of cement-based material and additive effectively blocks the link channel in crack, and it is closely knit to increase overall structure
Degree, it is easy for construction；
The second, by using the compounding coupling agent of the present invention, the compatibility of swelling agent and modified polypropylene fiber system is improved,
Microdilatancy in hydration process can effectively control volume of concrete contraction, and early crack incidence is greatly lowered and journey occurs
Degree；The adhesion strength with cement-based material is enhanced simultaneously so that cement-based material is well combined with high crack-resisting, cement base
Material penetrates into the interlayer spacings of high crack-resisting, improves its intensity and cementitiousness, has excellent corrosion resistance.
Third, by using ground granulated blast furnace slag, improve the pore structure and intensity after concrete hardening, and due to ore powder granularity
It is higher, cement particle surface can be adsorbed on so that the Flocculated Cement structure being likely to form originally can not be formed, and similar diminishing is played
The effect of agent improves its mobile performance in the identical flowing velocity that can significantly improve concrete mix of water consumption,
And the early stage pore structure to improving concrete is conducive to the durability for improving concrete by certain effect.
Specific implementation mode
Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under the concept thereof of the present invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
In following embodiment, the material used be all from it is commercially available, wherein flyash is that F I grade of flyash of class is produced in Tianjin,
Fineness 7.9%, water requirement 93%, loss on ignition 3.05%；Spherical glass powder be unformed hard white powder, pH value 6-7, than
Weight is 2.7g/ml, and grain size is 100 mesh；Water-reducing agent selects naphthalene series high-efficiency water-reducing agent, is brownish-yellow powder, solid content >=94%；It is swollen
Swollen dose is sulphoaluminate expander；Zeolite powder is in bluish white milk yellow, and dynamics is 100 mesh, proportion 2.1-2.3；Polypropylene fibre
For pencil monofilament-type, proportion 0.91, fibre diameter is 18-28 μm；Plasma treatment puies forward the multi-functional reality of polymerization using plasma
Platform (JH-1, Chinese Academy of Sciences's microelectronics center) is tested, using SP-3 types radio frequency adaptation as radio frequency source, frequency 13560kHz,
Under nitrogen atmosphere adjusting work pressure be 20Pa, voltage 500V；Water is drinking water, and wherein pH value is 5-8, and chloride is with Cl-
Meter<1800mg/L, sulfate is with SO4 2-Meter<2100mg/L.
The preparation example 1 of modified polypropylene fiber：
(1) graft modification：Polypropylene fibre carries out in acrylic acid solution60Co- gamma-rays pre-irradiations；
(2) decentralized processing：The polypropylene fibre of step (1) is impregnated into 30min in absolute ethyl alcohol, then in ultrasonic cleaner
Middle cleaning 20min, dries 3h in vacuum drying oven；
(3) secondary grafting is modified:The polypropylene fibre of step (2) is impregnated into 4h in acrylic acid solution, later, in inertia atmosphere
It encloses, pressure carries out corona treatment, processing time 3min under conditions of being 20Pa；
(4) it washs and dry：The polypropylene fibre of step (3) is washed 3 times with acetone, dries 2h in an oven to get modification
Polypropylene fibre.
The preparation example 2 of modified polypropylene fiber：
(1) graft modification：Polypropylene fibre carries out in acrylic acid solution60Co- gamma-rays pre-irradiations；
(2) decentralized processing：The polypropylene fibre of step (1) is impregnated into 40min in absolute ethyl alcohol, then in ultrasonic cleaner
Middle cleaning 25min, dries 3.5h in vacuum drying oven；
(3) secondary grafting is modified:The polypropylene fibre of step (2) is impregnated into 4.5h in acrylic acid solution, later, in inertia atmosphere
It encloses, pressure carries out corona treatment, processing time 10min under conditions of being 20Pa；
(4) it washs and dry：The polypropylene fibre of step (3) is washed 4 times with acetone, dries 2.5h in an oven to get changing
Property polypropylene fibre.
The preparation example 3 of modified polypropylene fiber：
(1) graft modification：Polypropylene fibre carries out in acrylic acid solution60Co- gamma-rays pre-irradiations；
(2) decentralized processing：The polypropylene fibre of step (1) is impregnated into 60min in absolute ethyl alcohol, then in ultrasonic cleaner
Middle cleaning 30min, dries 4h in vacuum drying oven；
(3) secondary grafting is modified:The polypropylene fibre of step (2) is impregnated into 5h in acrylic acid solution, later, in inertia atmosphere
It encloses, pressure carries out corona treatment, processing time 15min under conditions of being 20Pa；
(4) it washs and dry：The polypropylene fibre of step (3) is washed 5 times with acetone, dries 3h in an oven to get modification
Polypropylene fibre.
Compound the preparation example 1 of coupling agent：Dimethyl silicone polymer 1kg, phenyl triethoxy are sequentially added in a kettle
Silane 0.2kg, lauric acid diethyl amide 0.4kg, propylene glycol 2kg, hydrochloric acid 0.01kg and water 3.2kg, in 30 DEG C of isoperibols
Under be dispersed with stirring, mixing speed 2000rpm, mixing time 18h, using sol gel reaction formation contain organic and inorganic
The compounding coupling agent of functional group.
Compound the preparation example 2 of coupling agent：Dimethyl silicone polymer 1.5kg, three ethoxy of phenyl are sequentially added in a kettle
Base silane 0.3kg, lauric acid diethyl amide 0.66kg, propylene glycol 3kg, hydrochloric acid 0.03kg and water 4.2kg, in 45 DEG C of constant temperature rings
It is dispersed with stirring under border, mixing speed 2400rpm, mixing time 21h, is formed using sol gel reaction and contain organic-nothing
The compounding coupling agent of machine functional group.
Compound the preparation example 3 of coupling agent：Dimethyl silicone polymer 2kg, phenyl triethoxy are sequentially added in a kettle
Silane 0.5kg, lauric acid diethyl amide 0.88kg, propylene glycol 4kg, hydrochloric acid 0.05kg and water 6.4kg, in 60 DEG C of isoperibols
Under be dispersed with stirring, mixing speed 2800rpm, mixing time be for 24 hours, using sol gel reaction formation contain organic and inorganic
The compounding coupling agent of functional group.
Embodiment 1：By the sand of sand 237.5kg, 40-70 mesh of 42.5R grades of Portland cement 205kg, 20-40 mesh
Rubble 439kg that rubble 188kg that 142.5kg, particle size range are 0-5mm, particle size range are 6-20mm, flyash 57kg, ball
Shape glass powder 10kg, it 89 parts of ground granulated blast furnace slag, 0.56 part of naphthalene series high-efficiency water-reducing agent, sulphoaluminate expander 1.35kg, is modified and gathers
The compounding coupling agent 3kg of modified polypropylene fiber 10kg, 1 offer of compounding coupling agent preparation example that tacryl preparation example 1 provides,
The water of zeolite powder 15kg and 146kg are mixed evenly, and concrete with high cracking resistance is made.
Embodiment 2：By the sand of sand 250kg, 40-70 mesh of 42.5R grades of Portland cement 255kg, 20-40 mesh
Rubble 531kg that rubble 228kg that 150kg, particle size range are 0-5mm, particle size range are 6-20mm, flyash 66kg, spherical shape
Glass powder 12kg, 97 parts of ground granulated blast furnace slag, 0.56 part of naphthalene series high-efficiency water-reducing agent, sulphoaluminate expander 1.35kg, modified poly- third
The compounding coupling agent 4kg of modified polypropylene fiber 10kg, 2 offer of compounding coupling agent preparation example that alkene fiber preparation example 2 provides, it boils
The water of mountain flour 18kg and 162kg are mixed evenly, and concrete with high cracking resistance is made.
Embodiment 3：By the sand of sand 275kg, 40-70 mesh of 42.5R grades of Portland cement 279kg, 20-40 mesh
Rubble 598kg that rubble 256kg that 165kg, particle size range are 0-5mm, particle size range are 6-20mm, flyash 78kg, spherical shape
Glass powder 15kg, 105 parts of ground granulated blast furnace slag, 0.56 part of naphthalene series high-efficiency water-reducing agent, sulphoaluminate expander 1.35kg, modified poly- third
The compounding coupling agent 5kg of modified polypropylene fiber 10kg, 3 offer of compounding coupling agent preparation example that alkene fiber preparation example 3 provides, it boils
The water of mountain flour 20kg and 190kg are mixed evenly, and concrete with high cracking resistance is made.
Comparative example 1：By 380kg, S95 grades of miberal powder 4kg of 52.5R grades of Portland cements, grain size is the rubber of 20-30mm
Particle 280kg, the middle sand fine aggregate 650kg of fineness modulus 2.6-3.0, coarse aggregate 820kg, flyash 20kg, polystyrene bubble
Foam particle 15kg, water 145kg, phosphorus slag powder 20kg and ether type polycarboxylic acid water-reducing agent 9kg and 350kg water be mixed evenly, make
Obtain crack resistance concrete.
Comparative example 2：It is by rubble 500kg that 42.5R grades of Portland cement 400kg, grain size are 5-25cm, grain size
River sand 300kg, flyash 16kg, nano-silica powder 4kg, steel fibre 10kg, the Monofilament polypropylene fibres of 0.35-0.5mm
4kg, additive 7kg and 400kg water be mixed evenly, crack resistance concrete slurry is made.
Comparative example 3：By the sand of sand 275kg, 40-70 mesh of 42.5R grades of Portland cement 279kg, 20-40 mesh
Rubble 598kg that rubble 256kg that 165kg, particle size range are 0-5mm, particle size range are 6-20mm, flyash 78kg, spherical shape
Glass powder 15kg, 105 parts of ground granulated blast furnace slag, 0.56 part of naphthalene series high-efficiency water-reducing agent, sulphoaluminate expander 1.35kg, modified poly- third
The water of modified polypropylene fiber 10kg, zeolite powder 20kg and 190kg that alkene fiber preparation example 3 provides are mixed evenly, and are made
Crack resistance concrete.
According to《Standard for test methods of mechanical properties of ordinary concrete》(GB/T50081-2002) to Examples 1 to 3 and
The property indices such as mobility, mechanical property, the expansion character of concrete that comparative example 1~3 provides are tested, detection knot
Fruit is as shown in table 1：
1 embodiment 1-3 of table and comparative example 1-3 the performance test results
Cracking resistance is carried out to crack resistance concrete made from concrete with high cracking resistance made from above-described embodiment 1-3 and comparative example 1-3
Performance evaluation, the results are shown in Table 2：
2 embodiment 1-3 of table and comparative example 1-3 working performance test results
Data in conjunction with measured by Tables 1 and 2 are analyzed, the concrete with high cracking resistance and comparative example system prepared using the present invention
Standby concrete, compression strength is significantly raised, by using the compounding coupling agent of the present invention, improves swelling agent and modified poly- third
The compatibility of alkene fiber system, the microdilatancy in hydration process can effectively control volume of concrete contraction, early stage are greatly lowered
Crack occurrence rate and occurrence degree；The adhesion strength with cement-based material is enhanced simultaneously so that cement-based material is mixed with high cracking resistance
Solidifying soil is well combined, and cement-based material penetrates into the interlayer spacings of high crack-resisting, improves its intensity and cementitiousness, is had
There is excellent corrosion resistance.
Manufacturing cost of the present invention is low, favorable working performance, and intensity is high, and volume stability is good, and manufactured concrete product has
Stronger wilful and performance of resisting cracking, while the ability of the resistance to deformation at interface is improved, reduce the generation of crackle.
Claims (10)
1. a kind of concrete with high cracking resistance, which is characterized in that in terms of parts by weight, including 205-279 parts of cement, sand 380-440
Part, 627-854 parts of rubble, 57-78 parts of flyash, 10-15 parts of spherical glass powder, 89-105 parts of miberal powder, water-reducing agent 0.56-2.71
Part, 1.35-1.88 parts of swelling agent, 10-15 parts of modified polypropylene fiber, 3-5 parts of coupling agent of compounding, 15-20 parts of zeolite powder, water
146-190 parts.
2. a kind of concrete with high cracking resistance according to claim 1, which is characterized in that the modified polypropylene fiber is under
State method preparation：
(1) graft modification：Polypropylene fibre carries out in acrylic acid solution60Co- gamma-rays pre-irradiations；
(2) decentralized processing：The polypropylene fibre of step (1) is impregnated into 30-60min in absolute ethyl alcohol, it is then clear in ultrasonic wave
It washes and cleans 20-30min in device, 3-4h is dried in vacuum drying oven；
(3) secondary grafting is modified:The polypropylene fibre of step (2) is impregnated into 4-5h in acrylic acid solution, later, in inertia atmosphere
It encloses, pressure carries out corona treatment, processing time 3-15min under conditions of being 20Pa；
(4) it washs and dry：The polypropylene fibre of step (3) is subjected to washing 3-5 times, dry 2-3h is up to modified polypropene fibre
Dimension.
3. a kind of concrete of high cracking resistance according to claim 1, which is characterized in that the compounding coupling agent by comprising with
0.2-0.5 parts of 1-2 parts of polymethyl siloxane, phenyl triethoxysilane, the lauric acid diethyl amide 0.4- of parts by weight meter
0.88 part, 2-4 parts of propylene glycol, 0.01-0.05 parts of hydrochloric acid, 3.2-6.4 parts of water mixture carry out sol gel reaction be made.
4. a kind of concrete of high cracking resistance according to claim 3, which is characterized in that the item of the sol gel reaction
Part is：Dimethyl silicone polymer, phenyl triethoxysilane, lauric acid diethyl amide, the third two are sequentially added in a kettle
Alcohol, hydrochloric acid and water are dispersed with stirring under 30-60 DEG C of isoperibol, mixing speed 2000-2800rpm, mixing time 18-
24h。
5. a kind of high crack-resisting according to claim 1, which is characterized in that the miberal powder is S105 grades of blast-furnace cinders
Powder, specific surface area 525cm2/ g, fluidity ratio are 106%, and specific activity index 7d is 95%, 28d 115%.
6. a kind of concrete with high cracking resistance according to claim 1, which is characterized in that the flyash is global shape,
Grain size is continuously distributed and grain size≤3 μm, water demand ratio are not more than 95%.
7. a kind of high crack-resisting according to claim 1, which is characterized in that the water-reducing agent is naphthalene series high-efficiency diminishing
Agent, sodium sulphate content are less than 8%, and chloride ion content is less than 0.1%.
8. a kind of concrete with high cracking resistance according to claim 1, which is characterized in that the cement is 42.5R grades common
Portland cement.
9. a kind of concrete with high cracking resistance according to claim 1, which is characterized in that the sand includes that weight ratio is 5:3
20-40 mesh sand and 40-70 mesh sand, the sand be washing drying river sand.
10. a kind of concrete with high cracking resistance according to claim 1, which is characterized in that the rubble includes that mass ratio is
3:The mould degree of counting accurately of the rubble that the rubble and particle size range that 7 particle size range is 0-5mm are 6-20mm, rubble is 1.5.
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| CN115108778A (en) * | 2022-06-14 | 2022-09-27 | 上海二十冶建设有限公司 | High-ductility concrete composite material and preparation method thereof |
| CN116553886A (en) * | 2023-04-22 | 2023-08-08 | 北京民佳混凝土有限公司 | Crack-resistant waterproof concrete and preparation method thereof |
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