CN109650825A - A kind of concrete and its preparation method and application - Google Patents
A kind of concrete and its preparation method and application Download PDFInfo
- Publication number
- CN109650825A CN109650825A CN201910134165.0A CN201910134165A CN109650825A CN 109650825 A CN109650825 A CN 109650825A CN 201910134165 A CN201910134165 A CN 201910134165A CN 109650825 A CN109650825 A CN 109650825A
- Authority
- CN
- China
- Prior art keywords
- sand
- concrete
- water
- concrete according
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 63
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 17
- 239000003129 oil well Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000011398 Portland cement Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 11
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 11
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 11
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 28
- 229920006395 saturated elastomer Polymers 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000012802 nanoclay Substances 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010146 3D printing Methods 0.000 abstract description 18
- 239000004566 building material Substances 0.000 abstract description 3
- 229920005646 polycarboxylate Polymers 0.000 abstract description 2
- 239000004927 clay Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000007639 printing Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- 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
- C04B2111/00181—Mixtures specially adapted for three-dimensional printing (3DP), stereo-lithography or prototyping
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The present invention provides a kind of concrete and its preparation method and application, is related to building material technical field.Concrete of the invention, the raw material including following parts by weight: 30~36 parts of oil-well cement；14~18 parts of portland cement；0.3~1.2 part of Palygorskite Nanometer clay；44~58 parts of sand；0.5~1.0 part of glass powder；0.9~1.2 part of end hook steel fibre；0.08~0.18 part of polycarboxylate water-reducer；0.15~0.3 part of hydroxypropyl methyl cellulose.Concrete of the invention, mobility is moderate, setting time is short and it is controllable, early strength is high, bond strength between layers are high, endurance quality is good, be suitable for 3D printing.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to concrete and a preparation method thereof.
Background
The 3D printing technology can effectively solve the problems of more manual operations, large template consumption, difficult realization of complex modeling and the like in the traditional construction of buildings, and has remarkable advantages in the aspects of personalized design, intelligent construction and the like of buildings. Currently, a widely used technique for 3D printing buildings is "contour technology". The desired material is dispensed from a nozzle which, as directed by the design, will dispense the material at the desired location, just as a ring of toothpaste is dispensed on a table. Then, the scraping blades attached to both sides of the nozzle automatically extend out to regulate the shape of the printing material.
Realize 3D and print the building, need overcome two big problems: first, the material for 3D printing needs to have appropriate fluidity. If the fluidity is too large, the material cannot be stacked in the 3D printing process, and if the fluidity is too small, the 3D printing head may be clogged. The proper fluidity allows the concrete to set quickly upon ejection from the spray head. Secondly, the printing material needs to provide a certain strength to support the printing material which is subsequently piled up after the nozzle is extruded, and the strength time needs to be short enough to ensure the building speed.
Concrete is an important building material for 3D printing buildings, and the initial setting time, the final setting time and the like of the existing 3D printing concrete are difficult to meet the requirements of 3D printing, so that the development of concrete with short setting time and high early strength is required.
Disclosure of Invention
In view of the above, it is necessary to provide a concrete for 3D printing, which is a technical problem that the early strength of the existing concrete is not high enough.
The concrete comprises the following raw materials in parts by weight:
this concrete adopts the small particle size sand, introduces superfine low temperature oil well cement and glass powder, in addition the ultrasonic action for 3D prints concrete process controllable, construction simple, accurate, and 3D prints the homogeneity and the extrudability of concrete good, and the setting time is short and controllable, and early strength and final strength are high, and durability is good. This concrete is applicable to 3D and prints, and the blowout in-process can not lead to the unable material to pile up because of mobility is too big, also can not lead to 3D to print the jam of shower nozzle because of mobility undersize, can solidify in the short time after the blowout, and early intensity is high, and it is good to print the interlayer viscidity.
In one embodiment, the oil well cement is grade G and/or grade H, and has a particle size of less than 10 μm. The superfine low-temperature oil well cement is introduced, so that the concrete keeps better fluidity all the time in the ejection process, is solidified in a short time after being ejected, and has higher early strength, and in addition, the hardened concrete ink has better stability, impermeability and corrosion resistance.
In one embodiment, the sand is natural sand and/or sea sand.
In one embodiment, the grit comprises: 6-10 parts of 830-425 mu m sand, 10-14 parts of 425-230 mu m sand, 16-20 parts of 230-44 mu m sand and 12-14 parts of sand with the particle size less than 44 mu m. The adoption of the high-proportion small-particle-size graded sand is beneficial to realizing the uniformity and the extrudability of 3D printing concrete and preventing the blockage of a printing nozzle.
In one embodiment, the portland cement is selected from the group consisting of: 52.5, 52.5R, 62.5 and 62.5R.
In one embodiment, the particle size of the glass powder is 44-75 μm. The glass powder plays a role of inert filler in the pre-induction period of the early hydration process of the portland cement, a certain amount of alkali can be dissolved and released in the later stage of the hydration process, and the alkali decomposes ettringite crystals, thereby initiating the further hydration process of the portland cement; the glass powder can also be used as a pozzolanic material to improve a C-S-H matrix in concrete, and amorphous silicon in the glass powder reacts with portlandite and gypsum to form an uneven C-S-H matrix and enhance the frost resistance of the material.
In one embodiment, the length of the end hook steel fiber is 5-15 mm, and the diameter of the end hook steel fiber is 0.2-0.3 mm.
In one embodiment, the water reducing efficiency of the polycarboxylate superplasticizer is 31-33%.
In one embodiment, the viscosity of the hydroxypropyl methylcellulose at 25 ℃ is 180000-200000 mPa.s.
The invention also comprises a preparation method of the concrete, which comprises the following steps:
mixing raw materials: mixing the raw materials, adding water, uniformly mixing, adding water and simultaneously starting ultrasonic waves for ultrasonic treatment to obtain the concrete.
According to the preparation method, ultrasonic waves are used in the mixing process, ultrasonic activation can enable the concrete to generate more ettringite crystals in the pre-induction period hydration process, the number of the ettringite crystals is increased, the solidification time is greatly shortened, and the early strength is increased; the concrete prepared by the preparation method is moderate in fluidity and suitable for 3D printing, materials cannot be stacked due to too high fluidity in the spraying process, a 3D printing nozzle cannot be blocked due to too low fluidity, the concrete can be solidified in a short time after being sprayed, the early strength is high, and the printing interlayer viscosity is good.
In one embodiment, the raw material mixing step is performed in a stirred tank, specifically: adding sand into a stirring pot, stirring for 2-3 min, adding portland cement, oil well cement, palygorskite nano clay, glass powder, hooked steel fibers, a polycarboxylic acid water reducing agent and hydroxypropyl methyl cellulose, stirring for 3-5 min, adding water, wherein the water-to-gel ratio is 0.32-0.35, the gel is a mixture of the portland cement and the oil well cement, adding 50-1000 kHz ultrasonic waves while adding the water, and continuously stirring for 2-5 min at the stirring speed of 300-1000 r/min. Wherein the water-glue ratio is as follows: the ratio of the water consumption of the concrete to the glue consumption.
In one embodiment, the raw material mixing step further comprises a pretreatment step before, wherein the pretreatment step is to prepare saturated surface dry sand: placing the sand in an environment with the pressure intensity of less than or equal to 2.5kPa, keeping the pressure intensity at the pressure intensity for 10-20 min, injecting water again, completing the water injection within 5min until the sand is completely submerged, keeping the pressure intensity for 30-60 min to completely saturate the sand, taking out the sand from the water, and removing the water on the surface to obtain the saturated surface dry sand. The saturated surface dry sand is prepared, so that the water adding amount is easy to control during construction, stable concrete slump when the concrete is discharged from the mixer and the concrete slump pumped in a construction site are obtained, dust is reduced, the environmental pollution is effectively improved, the current peak value of the mixer is reduced, and the power consumption in production is saved; the stirring current is reduced, the production abrasion of the stirring blade and the lining plate is reduced, the service lives of the motor, the stirring blade and the lining plate are prolonged, and the resource and energy utilization rate is improved.
The invention further comprises application of the concrete in 3D printing concrete.
When the concrete is used for 3D printing, the concrete is prepared according to the preparation method and then extruded by an extruder.
Compared with the prior art, the invention has the following beneficial effects:
the concrete of the invention adopts high proportion of saturated surface dry-graded sand with small grain diameter, introduces superfine low-temperature oil well cement and glass powder, and has the advantages of good uniformity and extrudability, controllable setting time, high early strength and good printing interlayer viscosity under the action of ultrasonic waves; the preparation method of the invention can lead the obtained concrete to be coagulated in a short time and has high early strength; the concrete is used for 3D printing, cannot cause the situation that materials cannot be stacked due to too high fluidity, cannot cause the blockage of a 3D printing nozzle due to too low fluidity, and can be solidified in a short time after being sprayed.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the preferred embodiments. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
The concrete is prepared by the following preparation method:
(1) pretreatment: adding 8 parts of 830-425 mu m sand, 12 parts of 425-230 mu m sand, 16 parts of 230-44 mu m sand and 12 parts of sand with the particle size less than 44 mu m into a container, vacuumizing until the pressure is less than 2.5kPa, keeping constant pressure for 15min, then slowly injecting industrial water within 5min until the sand is completely submerged, keeping the pressure under vacuum for 50min to completely saturate the sand, taking out the sand from the water, and quickly wiping the surface by a towel with saturated water to obtain saturated surface dry sand;
(2) preparing concrete: adding the saturated surface dry sand obtained in the step (1) into a stirring pot, stirring at the stirring speed of 600r/min for 3min, adding 15 parts of Portland cement, 34 parts of oil well cement, 1 part of palygorskite nano clay, 0.8 part of glass powder, 1 part of end hook steel fiber, 0.12 part of polycarboxylic acid water reducer and 0.2 part of hydroxypropyl methyl cellulose, stirring for 5min, adding water, starting 1000kHz ultrasonic wave while adding water, and continuously stirring for 3min to obtain the water-soluble glass fiber reinforced plastic composite material.
Wherein the oil well cement is H-grade, and the particle size is less than 5 mu m; portland cement 62.5; the sand is natural sand; the grain size of the glass powder is 60 mu m; the length of the end hook steel fiber is 10mm, and the diameter is 0.3 mm; the water reducing efficiency of the polycarboxylic acid water reducing agent is 32 percent; the viscosity of hydroxypropylmethylcellulose at 25 ℃ was 200000 mPas.
Example 2
The concrete is prepared by the following preparation method:
(1) pretreatment: adding 6 parts of sand with the diameter of 830-425 micrometers, 14 parts of sand with the diameter of 425-230 micrometers, 16 parts of sand with the diameter of 230-44 micrometers and 14 parts of sand with the diameter of less than 44 micrometers into a container, vacuumizing until the pressure is less than 2.5kPa, keeping constant pressure for 20min, then slowly injecting industrial water within 5min until the sand is completely submerged, keeping the pressure under vacuum for 50min to completely saturate the sand, taking out the sand from the water, and quickly wiping the surface by a towel with saturated water to obtain saturated surface dry sand;
(2) preparing concrete: adding the saturated surface dry sand obtained in the step (1) into a stirring pot, stirring at the stirring speed of 300r/min for 3min, adding 18 parts of Portland cement, 30 parts of oil well cement, 0.3 part of palygorskite nano clay, 1.0 part of glass powder, 0.9 part of end hook steel fiber, 0.18 part of polycarboxylic acid water reducer and 0.15 part of hydroxypropyl methyl cellulose, stirring for 3min, adding water, starting 500kHz ultrasonic waves while adding water, and continuously stirring for 5min to obtain the water-based paint.
Wherein the oil well cement is grade G, and the average grain diameter is 9 μm; portland cement 52.5; the sand is sea sand; the grain size of the glass powder is 75 μm; the length of the end hook steel fiber is 5mm, and the diameter is 0.3 mm; the water reducing efficiency of the polycarboxylic acid water reducing agent is 33 percent; the hydroxypropylmethylcellulose had a viscosity of 180000 mPas at 25 ℃.
Example 3
The concrete is prepared by the following preparation method:
(1) pretreatment: adding 10 parts of 830-425 mu m sand, 10 parts of 425-230 mu m sand, 20 parts of 230-44 mu m sand and 12 parts of sand with the particle size less than 44 mu m into a container, vacuumizing until the pressure is less than 2.5kPa, keeping constant pressure for 10min, then slowly injecting industrial water within 5min until the sand is completely submerged, keeping the pressure under vacuum for 50min to completely saturate the sand, taking out the sand from the water, and quickly wiping the surface by a towel with saturated water to obtain saturated surface dry sand;
(2) preparing concrete: adding the saturated surface dry sand obtained in the step (1) into a stirring pot, stirring at the stirring speed of 1000r/min for 2min, adding 14 parts of Portland cement, 36 parts of oil well cement, 1.2 parts of palygorskite nano clay, 0.5 part of glass powder, 1.2 parts of end hook steel fiber, 0.08 part of polycarboxylic acid water reducer and 0.3 part of hydroxypropyl methyl cellulose, stirring for 5min, adding water, starting 1000kHz ultrasonic waves while adding water, and continuously stirring for 2min to obtain the water-soluble glass fiber reinforced plastic composite material.
Wherein the oil well cement is H-grade, and the average grain diameter is 5 mu m; the Portland cement is 62.5R; the sand is sea sand; the grain size of the glass powder is 44 μm; the length of the end hook steel fiber is 15mm, and the diameter is 0.2 mm; the water reducing efficiency of the polycarboxylic acid water reducing agent is 31 percent; the viscosity of hydroxypropylmethylcellulose at 25 ℃ was 200000 mPas.
Example 4
A concrete prepared substantially the same as in example 1 except that: replacing the sand in the step (1) with: 48 parts of 830-425 mu m sand.
Example 5
A concrete prepared substantially the same as in example 1 except that: the grain diameter of the glass powder in the step (2) is 200 μm.
Comparative example 1
A concrete prepared substantially the same as in example 1 except that: oil well cement is not added in the step (2), and 49 parts of Portland cement is added.
Comparative example 2
A concrete prepared substantially the same as in example 1 except that: ultrasonic waves are not activated in the step (2).
Examples of the experiments
The concrete of the above examples 1 to 5 and comparative examples 1 to 2 were subjected to a performance test comprising: fluidity, tensile bonding strength, compressive strength, flexural strength, setting time test and the like. Wherein,
(1) the fluidity test refers to the specification of GB/T2419;
(2) the tensile bond strength test refers to the specification of JGJ/T70;
(3) the compression strength and the rupture strength are tested according to the specification of GB/T50081;
(4) the clotting time test is referred to the specification of JGJ/T70.
The test results are shown in the following table:
as can be seen from the above table, the concrete of the embodiment of the invention has moderate fluidity and is suitable for 3D printing, the concrete of the comparative example has smaller fluidity and longer setting time; compared with the comparative example, the concrete of the example has stronger compressive strength for 1h and 7h, which shows that the concrete of the invention has high early strength.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The concrete is characterized by comprising the following raw materials in parts by weight:
2. the concrete according to claim 1, wherein the oil well cement is grade G and/or H, and has a particle size of less than 10 μm.
3. Concrete according to claim 1 or 2, characterized in that the sand is a natural and/or sea sand comprising:
4. concrete according to claim 1, characterized in that said Portland cement is selected from: at least one of 52.5, 52.5R, 62.5 and 62.5R; the particle size of the glass powder is 44-75 mu m.
5. The concrete according to claim 1, wherein the end hook steel fibers have a length of 5 to 15mm and a diameter of 0.2 to 0.3 mm.
6. The concrete according to claim 1, wherein the polycarboxylic acid water reducing agent has a water reducing efficiency of 31 to 33% and the hydroxypropyl methylcellulose has a viscosity of 180000 to 200000 mPa-s.
7. A method for preparing a concrete according to any one of claims 1 to 6, comprising the steps of:
mixing raw materials: mixing the raw materials, adding water, uniformly mixing, adding water and simultaneously starting ultrasonic waves for ultrasonic treatment to obtain the concrete.
8. The method for preparing concrete according to claim 7, wherein the raw material mixing step is performed in a stirred tank, in particular: adding sand into a stirring pot, stirring for 2-3 min, adding portland cement, oil well cement, palygorskite nano clay, glass powder, hooked steel fibers, a polycarboxylic acid water reducing agent and hydroxypropyl methyl cellulose, stirring for 3-5 min, adding water, wherein the water-to-gel ratio is 0.32-0.35, the gel is a mixture of the portland cement and the oil well cement, adding water, and simultaneously starting 50-1000 kHz ultrasonic waves to carry out ultrasonic treatment, and continuously stirring for 2-5 min at the stirring speed of 300-1000 r/min.
9. The method for preparing concrete according to claim 7 or 8, wherein the raw material mixing step further comprises a pretreatment step before, wherein the pretreatment step is to prepare saturated surface dry sand: placing the sand in an environment with the pressure intensity of less than or equal to 2.5kPa, keeping the pressure intensity at the pressure intensity for 10-20 min, injecting water again, completing the water injection within 5min until the sand is completely submerged, keeping the pressure intensity for 30-60 min to completely saturate the sand, taking out the sand from the water, and removing the water on the surface to obtain the saturated surface dry sand.
10. Use of the concrete according to any one of claims 1 to 6 in 3D printed concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134165.0A CN109650825A (en) | 2019-02-22 | 2019-02-22 | A kind of concrete and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134165.0A CN109650825A (en) | 2019-02-22 | 2019-02-22 | A kind of concrete and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109650825A true CN109650825A (en) | 2019-04-19 |
Family
ID=66122979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910134165.0A Withdrawn CN109650825A (en) | 2019-02-22 | 2019-02-22 | A kind of concrete and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109650825A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110606715A (en) * | 2019-09-27 | 2019-12-24 | 同济大学 | Grid-shaped concrete artificial coral reef and preparation method and application thereof |
| CN114262105A (en) * | 2021-12-28 | 2022-04-01 | 普宁市吉润混凝土有限公司 | Carbon neutralization wastewater recycling treatment method and concrete containing wastewater |
| EP4151408A1 (en) * | 2021-09-21 | 2023-03-22 | Holcim Technology Ltd | Dry cementitious material mixture for 3d-printing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110177188A1 (en) * | 2010-01-15 | 2011-07-21 | Massachusetts Institute Of Technology | Cement-based materials system for producing ferrous castings using a three-dimensional printer |
| CN203141653U (en) * | 2013-03-15 | 2013-08-21 | 宫海西 | Catalysis accelerating type mixing machine of inorganic bond material |
| CN105731968A (en) * | 2016-02-29 | 2016-07-06 | 同济大学 | Glass fiber reinforced gypsum capable of being used for 3D printing |
| CN106186981A (en) * | 2016-07-26 | 2016-12-07 | 苏州秉创科技有限公司 | A kind of construction material printed for 3D |
| CN108529968A (en) * | 2018-04-25 | 2018-09-14 | 浙江大学 | A kind of fiber concrete material and preparation method thereof for 3D printing |
| CN109020422A (en) * | 2018-09-28 | 2018-12-18 | 长安大学 | A kind of 3D printing carbon nanotube ultra-high performance concrete and preparation method thereof |
-
2019
- 2019-02-22 CN CN201910134165.0A patent/CN109650825A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110177188A1 (en) * | 2010-01-15 | 2011-07-21 | Massachusetts Institute Of Technology | Cement-based materials system for producing ferrous castings using a three-dimensional printer |
| CN203141653U (en) * | 2013-03-15 | 2013-08-21 | 宫海西 | Catalysis accelerating type mixing machine of inorganic bond material |
| CN105731968A (en) * | 2016-02-29 | 2016-07-06 | 同济大学 | Glass fiber reinforced gypsum capable of being used for 3D printing |
| CN106186981A (en) * | 2016-07-26 | 2016-12-07 | 苏州秉创科技有限公司 | A kind of construction material printed for 3D |
| CN108529968A (en) * | 2018-04-25 | 2018-09-14 | 浙江大学 | A kind of fiber concrete material and preparation method thereof for 3D printing |
| CN109020422A (en) * | 2018-09-28 | 2018-12-18 | 长安大学 | A kind of 3D printing carbon nanotube ultra-high performance concrete and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 中国石油天然气总公司勘探局: "《油气钻探新技术》", 30 June 1998, 石油工业出版社 * |
| 刘长俊: "《混凝土配合比设计计算手册》", 31 May 1997, 辽宁科学技术出版社 * |
| 地质部地质辞典办公室: "《地质大辞典（五）》", 30 June 2005, 地质出版社 * |
| 蒋林华: "《混凝土材料学》", 31 August 2006, 河海大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110606715A (en) * | 2019-09-27 | 2019-12-24 | 同济大学 | Grid-shaped concrete artificial coral reef and preparation method and application thereof |
| EP4151408A1 (en) * | 2021-09-21 | 2023-03-22 | Holcim Technology Ltd | Dry cementitious material mixture for 3d-printing |
| WO2023047296A1 (en) * | 2021-09-21 | 2023-03-30 | Holcim Technology Ltd | Dry cementitious material mixture for 3d-printing |
| CN114262105A (en) * | 2021-12-28 | 2022-04-01 | 普宁市吉润混凝土有限公司 | Carbon neutralization wastewater recycling treatment method and concrete containing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7196108B2 (en) | Method for 3D printing of mineral binder composition | |
| CN101863631B (en) | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof | |
| CN105837137B (en) | A kind of composite enhanced rapid-patching motar | |
| CN109534748B (en) | Premixed pervious concrete and preparation method and application thereof | |
| CN109650825A (en) | A kind of concrete and its preparation method and application | |
| US20120270971A1 (en) | Extruded fiber reinforced cementitious products having stone-like properties and methods of making the same | |
| CN107298546A (en) | Alkali-activated carbonatite binder materials and its Method of printing for 3D printing | |
| EP3600811B1 (en) | Method for applying mineral binder compositions containing fibres | |
| CN103255888A (en) | Full-body dry hanging plate and manufacturing method thereof | |
| CN113816690A (en) | Concrete repairing material and preparation method thereof | |
| CN114751699B (en) | 3D printing-based solid waste recycling light high-ductility concrete | |
| CN114702287B (en) | Printing material and preparation method and application thereof | |
| CN110627473A (en) | Phosphorus-silicon-magnesium-based special rapid-hardening material and preparation method thereof | |
| CN106587869A (en) | Autoclaved aerated concrete block doped with modified polypropylene hollow fiber and preparation method thereof | |
| CA3172378A1 (en) | Dry cementitious material mixture for 3d-printing | |
| CN111925175A (en) | Super-flexible sulphoaluminate cement-based 3D printing material | |
| CN114956724B (en) | Ceramic tile adhesive and preparation method thereof | |
| CN112759350B (en) | Ettringite whisker interlayer reinforcing binder for 3D printing and use method | |
| CN201694960U (en) | Stone aggregate wrapped by micro-fiber polymer mortar thin layer | |
| CN108585639A (en) | Superhigh molecular weight polyethylene fibers enhance zeolite-fly ash-based geopolymer and preparation method thereof | |
| CN116081989A (en) | Polymer modified 3D printing high-permeability cement mortar and preparation method thereof | |
| CN114988836B (en) | High-strength gypsum mortar and preparation method and application thereof | |
| CN116947369A (en) | Reinforcing agent for commodity permeable concrete of mixing station, and preparation method and construction process thereof | |
| CN117534408A (en) | Plastic repair material and preparation method thereof | |
| CN117843333A (en) | Crack-resistant plastering mortar and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190419 |