CN113307551A

CN113307551A - High-ductility concrete and preparation method and equipment thereof

Info

Publication number: CN113307551A
Application number: CN202110581770.XA
Authority: CN
Inventors: 陈三柱; 严志全
Original assignee: Foshan Gaoming Mingjian Concrete Distribution Co ltd
Current assignee: Foshan Gaoming Mingjian Concrete Distribution Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-08-27
Anticipated expiration: 2041-05-26
Also published as: CN113307551B

Abstract

The application relates to the field of concrete production, and particularly discloses high-ductility concrete and a preparation method and equipment thereof. The high-ductility concrete comprises coarse aggregate, fine aggregate, quartz sand, cement, water, fly ash, coumarone resin, polyvinyl alcohol fiber, permanganate and a water reducing agent; the preparation method comprises the following steps: firstly, adding cement, quartz sand, fly ash, coarse aggregate, fine aggregate, polyvinyl alcohol fiber and coumarone resin into a stirrer to be mixed to obtain a first mixture, then mixing and stirring a water reducing agent and water to obtain a second mixture, then adding permanganate into the second mixture to obtain a third mixture, and finally adding the third mixture into the first mixture to obtain high-ductility concrete; the equipment comprises a frame, a mixing drum, a mixing component, a driving mechanism, a scraping component and a lifting component. The concrete reinforcing agent has the advantages of enhancing the overall mechanical property of the high-ductility concrete and simultaneously enlarging the application range of the high-ductility concrete.

Description

High-ductility concrete and preparation method and equipment thereof

Technical Field

The application relates to the field of concrete production and manufacturing, in particular to high-ductility concrete and a preparation method and equipment thereof.

Background

The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening.

Since current concrete exhibits a brittle characteristic under tensile or bending loads, in order to improve the brittleness of the concrete material, a certain amount of chopped fibers is generally added to the concrete material to form high-ductility concrete. The high-ductility concrete is a fiber reinforced composite material based on a design principle of micromechanics and taking cement, quartz sand and the like as matrixes, and has high ductility, high damage resistance, high durability, high strength and good crack control capability.

When the existing high-ductility concrete is prepared and processed, the generally adopted fiber is a hydrophilic polyvinyl alcohol fiber, and the surface of the polyvinyl alcohol fiber has hydroxyl groups, so that the polyvinyl alcohol fiber and surrounding hydration products generate stronger chemical bonding energy, and when the high-ductility concrete bears larger pressure, the stronger chemical bonding energy can easily cause the breakage of the polyvinyl alcohol fiber, the mechanical property of a high-ductility concrete material is reduced, and the application range of the high-ductility concrete is influenced.

Disclosure of Invention

In order to enhance the overall mechanical property of the high-ductility concrete and effectively expand the application range of the high-ductility concrete, the application provides the high-ductility concrete, and a preparation method and equipment thereof.

In a first aspect, the present application provides a high-ductility concrete, which adopts the following technical scheme:

coarse aggregate: 350-500 parts;

fine aggregate: 280-380 parts;

quartz sand: 180-300 parts;

cement: 210-255 parts;

water: 95-160 parts;

fly ash: 140-290 parts;

coumarone resin: 10-25 parts;

polyvinyl alcohol fibers: 23-38 parts;

permanganate: 5-16 parts of a stabilizer;

water reducing agent: 2-9 parts.

Through the mutual synergistic interaction of the polyvinyl alcohol fiber, the coumarone resin and the permanganate, the flexural strength and the compressive strength of the high-ductility concrete can be better enhanced, so that the overall mechanical property of the high-ductility concrete is enhanced, the application range of the high-ductility concrete is widened to a certain extent, and the high-ductility concrete has great economic value.

Regarding the phenomenon of enhanced mechanical properties, the inventors guess that after the polyvinyl alcohol fibers are added, the polyvinyl alcohol fibers are rapidly filled into the pores of the coarse aggregate and the fine aggregate, then the coumarone resin is rapidly softened and forms a net-shaped cross-linked structure to be bonded on the surfaces of the coarse aggregate and the fine aggregate, so that the chemical bonding energy between the polyvinyl alcohol fibers and the surrounding hydration products is reduced, the stability of the polyvinyl alcohol fibers in the pores is improved, and in addition, after the permanganate is added, on one hand, the bonding force of the coumarone resin on the surfaces of the coarse aggregate and the fine aggregate can be improved through the combination of the permanganate and the coumarone resin, on the other hand, the adsorption effect of the coumarone resin can be enhanced through the action of the permanganate on the coumarone resin, so that the peripheral hydration products are adsorbed by the coumarone resin, and the possibility of the combination of the polyvinyl alcohol fibers and the hydration products can be further reduced, the aim of enhancing the overall mechanical property of the high-ductility concrete is achieved, and the application range of the high-ductility concrete is further expanded to a certain extent.

Preferably, the polyvinyl alcohol fiber is 28-33 parts by weight, the coumarone resin is 15-23 parts by weight, and the permanganate is 8-13 parts by weight.

By adopting the technical scheme, the inventor finds that the synergistic effect among polyvinyl alcohol fiber, coumarone resin and permanganate can be better improved by further reducing the value range of the weight parts of the polyvinyl alcohol fiber, the coumarone resin and the permanganate, so that the overall mechanical property of the concrete is more effectively enhanced, and the tensile ductility of the high-ductility concrete is enhanced to a certain extent.

Preferably, the coumarone resin has a viscosity of 80 to 90 mPas.

By adopting the technical scheme, the viscosity range of the coumarone resin is controlled to be 80-90 mPa.s, so that the flexural strength and the compressive strength of the concrete can be further improved, the mechanical property in the concrete can be effectively enhanced, and the service life of the concrete can be prolonged to a certain extent.

Preferably, the permanganate is one of potassium permanganate, sodium permanganate and calcium permanganate.

By adopting the technical scheme, one of potassium permanganate, sodium permanganate and calcium permanganate is selected and added into the raw material components, so that the synergistic effect of the polyvinyl alcohol fiber, the coumarone resin and the permanganate can be better exerted, the mechanical strength of the concrete is effectively enhanced, and the application range of the high-ductility concrete can be further expanded.

Preferably, the raw materials also comprise glass beads, and the weight parts of the glass beads are 85-100 parts.

By adopting the technical scheme, the glass beads are added into the raw material components, so that the dispersion of the polyvinyl alcohol fibers in the system can be accelerated, the combination degree of the polyvinyl alcohol fibers with coarse aggregates and fine aggregates can be further improved, and the aim of more effectively enhancing the ductility of concrete can be fulfilled.

Preferably, the water reducing agent is one of a lignosulfonate water reducing agent, a naphthalenesulfonate water reducing agent and a sulfamate high-efficiency water reducing agent.

By adopting the technical scheme, one of the lignosulfonate water reducing agent, the naphthalenesulfonate water reducing agent and the sulfamate high-efficiency water reducing agent is added into the raw material components, so that the dispersion effect of particles in a raw material system can be effectively improved, and meanwhile, the fluidity of the raw material system is improved, so that the fracture resistance and the compression resistance of concrete can be better improved.

Preferably, the particle size range of the fine aggregate is 1.5-3mm, and the particle size range of the coarse aggregate is 7.6-9.6 mm.

By adopting the technical scheme, the particle size ranges of the fine aggregate and the coarse aggregate are controlled, so that the polyvinyl alcohol fiber, the fine aggregate and the coarse aggregate can be better combined, and the mechanical strength of the concrete can be further enhanced.

In a second aspect, the present application provides a method for preparing high-ductility concrete, which adopts the following technical scheme:

a preparation method of high-ductility concrete comprises the following steps:

the method comprises the following steps: adding cement, quartz sand, fly ash, coarse aggregate, fine aggregate, polyvinyl alcohol fiber and coumarone resin into a stirrer according to the parts by weight, stirring for 5-7min, heating to 80-90 ℃, and uniformly mixing to obtain a first mixture;

step two: mixing the water reducing agent and water according to the parts by weight, stirring for 20-30s, and uniformly mixing to obtain a second mixture;

step three: adding the permanganate into the second mixture according to the weight part, stirring for 1-2min, uniformly mixing, and heating to 85-110 ℃ to obtain a third mixture;

step four: and adding the third mixture into a stirrer, mixing with the first mixture, stirring for 1-2 h, and uniformly mixing to obtain the high-ductility concrete.

By adopting the technical scheme, the inventor guesses that the polyvinyl alcohol fibers, the coumarone resin and the permanganate generate a certain synergistic effect after being mixed and stirred for a certain time, so that the combination between the polyvinyl alcohol fibers and hydration products in a system can be reduced to a certain extent, the condition that the polyvinyl alcohol fibers are broken is further reduced, and the integral ductility of concrete is better improved.

Preferably, in the first step, 85 to 100 parts by weight of glass beads are also added.

By adopting the technical scheme, the inventor guesses that the glass beads are added in the first step, so that the glass beads can firstly disperse the polyvinyl alcohol fibers, the self effect of the glass beads can be effectively exerted, and the effect of the polyvinyl alcohol fibers in a system can be further improved.

In a third aspect, the present application provides an apparatus for preparing high-ductility concrete, which adopts the following technical scheme:

the utility model provides an equipment for preparing high ductility concrete, includes frame and churn, be provided with the stirring subassembly in the churn, be provided with the actuating mechanism who is used for driving the stirring subassembly in the frame, the inner chamber of churn is provided with the material subassembly of scraping that is used for clearing up the concrete of churn inside wall, the lateral wall of churn is provided with and is used for adjusting the lifting unit who scrapes the material subassembly place height.

Scrape material subassembly and lifting unit through the setting, can be when using this equipment to stir the concrete, can splash the concrete of churn inside wall through scraping mutually supporting of material subassembly and lifting unit to the stirring and scrape down to effectual improvement is the degree of mixing uniformity between each raw materials of high ductile concrete, and then has promoted the product quality of high ductile concrete to a certain extent.

In summary, the present application has the following beneficial effects:

1. through the mutual synergistic cooperation of the polyvinyl alcohol fibers, the coumarone resin and the permanganate, the flexural strength and the compressive strength of the concrete can be better enhanced, so that the overall mechanical property of the high-ductility concrete is enhanced, the application range of the high-ductility concrete is widened to a certain extent, and the high-ductility concrete has great economic value;

2. by further reducing the value ranges of the polyvinyl alcohol fibers, the coumarone resin and the permanganate in parts by weight, the synergistic effect among the polyvinyl alcohol fibers, the coumarone resin and the permanganate can be better improved, so that the overall mechanical property of the concrete is more effectively enhanced, and the ductility of the high-ductility concrete is enhanced to a certain extent;

3. after the polyvinyl alcohol fibers, the coumarone resin and the permanganate are mixed and stirred for a certain time, a certain synergistic effect is generated, so that the combination between the polyvinyl alcohol fibers and hydration products in a system can be reduced to a certain extent, the condition that the polyvinyl alcohol fibers are broken is reduced, and the integral ductility of concrete is further improved;

4. scrape material subassembly and lifting unit through the setting, can be when using this equipment to stir the concrete, can splash the concrete of churn inside wall through scraping mutually supporting of material subassembly and lifting unit to the stirring and scrape down to effectual improvement is the degree of mixing uniformity between each raw materials of high ductile concrete, and then has promoted the product quality of high ductile concrete to a certain extent.

Drawings

FIG. 1 is a schematic view of the overall configuration of a blender according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a mixing drum according to an embodiment of the present application;

fig. 3 is an enlarged view of a portion a in fig. 2.

Description of reference numerals: 1. a frame; 10. a mixing drum; 11. a drive mechanism; 2. a rotating shaft; 20. a stirring paddle; 3. a support plate; 30. a guide groove; 31. a guide block; 32. a first cylinder; 33. a connecting rod; 34. an arc-shaped strip; 35. a cleaning brush; 4. a yielding groove; 5. positioning a plate; 50. a second cylinder; 6. an extension bar; 60. and (4) raised strips.

Detailed Description

The present application will be described in further detail with reference to examples.

TABLE 1 sources and types of raw materials

Name of raw materials	Model number	Manufacturer of the product
			Coumarone resin	100-110	Shanghai auspicious titanation chemical Co., Ltd
Polyvinyl alcohol fiber	205	Jinan Sha super chemical Co Ltd
			Naphthalene sulfonate water reducing agent	SNF－C	Chuzhou city Henchang chemical Co Ltd
Lignosulfonate water reducing agent	SC006	Jinan Longjie chemical Co Ltd
			Sulfamate high-efficiency water reducing agent	FL－B	Yongyui county legendary small dragon with horns Jinfuli chemical plant in Jiangxi province

Example 1

The high-ductility concrete comprises the following steps of, by weight, referring to Table 2:

the method comprises the following steps: adding cement, quartz sand, fly ash, coarse aggregate, fine aggregate, polyvinyl alcohol fiber and coumarone resin into a stirrer according to the mass, mixing at the rotation speed of 190r/min for 7min, heating to 90 ℃, and uniformly mixing to obtain a first mixture;

step two: adding the water reducing agent and water into the first mixture of the stirrer according to the mass, mixing at the rotating speed of 360r/min for 30s, and uniformly mixing to obtain a second mixture;

step three: adding the permanganate into the second mixture according to the mass, stirring for 1min at the rotation speed of 180r/min, uniformly mixing, and heating to 85 ℃ to obtain a third mixture;

step four: and (5) continuously stirring the third mixture by using a stirrer at the rotating speed of 80r/min for 2 hours to obtain the high-ductility concrete.

Example 2

The method comprises the following steps: adding cement, quartz sand, fly ash, coarse aggregate, fine aggregate, polyvinyl alcohol fiber and coumarone resin into a stirrer according to the mass, mixing at the rotation speed of 190r/min for 5min, heating to 80 ℃, and uniformly mixing to obtain a first mixture;

step two: adding the water reducing agent and water into a stirrer according to the mass for mixing, stirring for 20s at the rotating speed of 360r/min, and uniformly mixing to obtain a second mixture;

step three: adding the permanganate into the second mixture according to the mass, stirring for 2min at the rotation speed of 180r/min, uniformly mixing, and heating to 110 ℃ to obtain a third mixture;

step four: and (5) continuously stirring the third mixture by using a stirrer at the rotating speed of 80r/min for 1h to obtain the high-ductility concrete.

Example 3

The method comprises the following steps: adding cement, quartz sand, fly ash, coarse aggregate, fine aggregate, polyvinyl alcohol fiber and coumarone resin into a stirrer according to the mass, mixing at the rotation speed of 190r/min for 6.5min, heating to 88 ℃, and uniformly mixing to obtain a first mixture;

step two: adding the water reducing agent and water into a stirrer according to the mass for mixing, stirring at the rotating speed of 360r/min for 25s, and uniformly mixing to obtain a second mixture;

step three: adding the permanganate into the second mixture according to the mass, stirring at the rotation speed of 180r/min for 1.5min, uniformly mixing, and heating to 95 ℃ to obtain a third mixture;

step four: and continuously stirring the third mixture by using a stirrer at the rotating speed of 80r/min for 1.5h to obtain the high-ductility concrete.

In examples 1 to 3, the coarse aggregate used had a particle size in the range of one of 6.5 to 7.5mm, 8.5 to 12.5mm and 9.5 to 10.5 mm.

In examples 1 to 3, the fine aggregate used had a particle size in the range of 0.5 to 2mm, 1.4 to 2.4mm and 2.5 to 3.3 mm.

In examples 1 to 3, coumarone resin was used in a viscosity range of one of 90 to 100 mPas, 100-.

In examples 1 to 3, one of sodium permanganate, calcium permanganate and potassium permanganate was used as the permanganate.

In examples 1 to 3, the water reducing agent was one of a sulfamate high-efficiency water reducing agent, a lignosulfonate water reducing agent and a naphthalenesulfonate water reducing agent.

TABLE 2-specific inputs (in kg) of the raw material components in examples 1 to 3

Example 4

A high ductility concrete, which is different from example 3 in that 15kg of coumarone resin, 33kg of polyvinyl alcohol fiber and 8kg of sodium permanganate were used.

Example 5

A high ductility concrete, which is different from example 3 in that 23kg of coumarone resin, 28kg of polyvinyl alcohol fiber and 13kg of sodium permanganate were used.

Example 6

A high ductility concrete, which is different from example 3 in that the amount of coumarone resin used was 18kg, the amount of polyvinyl alcohol fiber used was 30kg, and the amount of sodium permanganate used was 10 kg.

Example 7

A high-ductility concrete, which is different from that of example 6 in that the coumarone resin has a viscosity of 80 to 90 mPas.

Example 8

The difference between the high-ductility concrete and the concrete in example 7 is that the raw materials also comprise glass beads, wherein in the first step, the glass beads with the mass of 85kg are added together.

Example 9

The difference between the high-ductility concrete and the concrete in example 7 is that the raw materials also comprise glass beads, wherein in the first step, 100kg of glass beads are added together.

Example 10

The difference between the high-ductility concrete and the concrete in example 7 is that the raw materials also comprise glass beads, wherein in the first step, glass beads with the mass of 95kg are added together.

Example 11

A high-ductility concrete, which is different from example 10 in that the particle size of the coarse aggregate is in the range of 7.6 to 9.6mm and the particle size of the fine aggregate is in the range of 1.5 to 3 mm.

Comparative example

Comparative example 1

A high ductility concrete, which is different from example 3 in that coumarone resin was replaced with equal amount of quartz sand.

Comparative example 2

A high ductility concrete, differing from example 3 in that the polyvinyl alcohol fibers were replaced with equal amounts of quartz sand.

Comparative example 3

A high ductility concrete, differing from example 3 in that sodium permanganate was replaced with an equal amount of quartz sand.

Comparative example 4

A high ductility concrete, which is different from example 3 in that coumarone resin, polyvinyl alcohol fiber and sodium permanganate were replaced with equal amounts of quartz sand.

Performance test

The 28d flexural strength (MPa) of the high-ductility concrete prepared in examples 1-11 and comparative examples 1-4 was measured by GB/T50081-2002 Standard test method for mechanical Properties of ordinary concrete, and the higher the value of the flexural strength, the better the fracture resistance of the high-ductility concrete.

The 28d compressive strength (MPa) of the high-ductility concrete prepared in examples 1-11 and comparative examples 1-4 is detected by GB/T50081-2002 Standard test method for mechanical Properties of ordinary concrete, and the higher the value of the compressive strength, the better the compressive property of the high-ductility concrete.

TABLE 3 summary of test data for examples 1-11 and comparative examples 1-4

	28d flexural strength	28d compressive strength
			Example 1	9.3	45.6
Example 2	9.5	46.2
			Example 3	9.6	46.9
Example 4	10.9	47.9
			Example 5	11.1	48.4
Example 6	11.3	48.9
			Example 7	12.6	50.2
Example 8	13.7	51.6
			Example 9	13.8	51.9
Example 10	13.1	52.2
			Example 11	14.1	53.1
Comparative example 1	7.3	37.8
			Comparative example 2	6.1	36.4
Comparative example 3	7.1	37.4
			Comparative example 4	5.6	34.5

According to the comparison of the test data of the example 3 and the comparative examples 1 to 4 in the table 3, when the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate are matched with each other and act together in the high-ductility concrete, the breaking strength and the compressive strength of the high-ductility concrete are obviously increased, the fracture resistance and the compressive resistance of the concrete are effectively improved, and the mechanical property of the concrete is improved to a certain extent.

According to the comparison of the test data of the embodiments 3-6 in table 3, the weight ratio of the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate is controlled, so that the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate are further promoted to generate a better synergistic effect, the mutual matching effect of the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate is more effectively enhanced, the mechanical property inside the concrete is possibly better enhanced, and the fracture resistance and the pressure resistance of the concrete can be further improved.

As can be seen from comparison of the test data of examples 6 to 7 in Table 3, the effect of coumarone-like resin in the raw material system can be more effectively improved by controlling the viscosity of coumarone-like resin within a certain range, and the anti-fracture property and the anti-compression property of concrete can be further enhanced.

According to the comparison of the test data of the examples 7 to 10 in the table 3, it can be known that the mechanical property in the concrete can be better improved by adding the glass beads and controlling the weight ratio of the glass beads, and meanwhile, the synergistic effect of the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate is improved, and the ductility of the whole concrete is further enhanced.

According to comparison of test data 10-11 in table 3, the particle size ranges of the coarse aggregate and the fine aggregate are controlled, so that the coumarone resin, the polyvinyl alcohol fiber and the sodium permanganate can better generate a synergistic effect, the flexural strength and the compressive strength of the concrete are further effectively improved, the mechanical strength inside the concrete is enhanced to a certain extent, the purpose of widening application scenes of the high-ductility concrete is achieved, and the high-ductility concrete has great economic value.

A stirrer is a device for stirring the raw materials of examples 1 to 11 and various proportions to realize uniform mixing of the raw materials:

referring to fig. 1, the mixer includes a frame 1 and a mixing drum 10. The mixing drum 10 is open, a driving mechanism 11 is disposed at the bottom of the mixing drum 10, and a mixing assembly connected to an output shaft of the driving mechanism 11 is disposed inside the mixing drum 10.

Referring to fig. 1 and 2, the stirring assembly includes a rotating shaft 2 and a stirring paddle 20. The rotating shaft 2 is vertically installed at the center of the inner bottom surface of the mixing drum 10, and meanwhile, one end of the rotating shaft 2 penetrates through the inner bottom surface of the mixing drum 10 and is connected with an output shaft of the driving mechanism 11. In addition, the stirring paddles 20 are provided with a plurality of stirring paddles 20, the stirring paddles 20 are vertically arranged on the peripheral side of the rotating shaft 2, and meanwhile, the stirring paddles 20 are all located at the same height on the side wall of the rotating shaft 2 and are circumferentially arrayed by taking the axis of the rotating shaft 2 as the center of a circle.

In order to improve the mixing uniformity of the raw materials, a bearing plate 3 is arranged at the top of the mixing drum 10, one end of the rotating shaft 2, which is far away from the driving mechanism 11, penetrates through the bearing plate 3, the bearing plate 3 is in sliding fit with the rotating shaft 2, and meanwhile, a scraping component is arranged on the bearing plate 3.

In addition, referring to fig. 2 and 3, two guide grooves 30 are formed in the lower end surface of the support plate 3, the two guide grooves 30 are symmetrically formed, and the two guide grooves 30 are respectively located on both sides of the rotating shaft 2 and have the same extending direction as the length direction of the support plate 3.

Referring to fig. 2 and 3, the scraper assembly includes a guide block 31, a first cylinder 32, and a cleaning member. The two first cylinders 32 are symmetrically arranged, the two first cylinders 32 are fixed to the two guide grooves 30 respectively, the first cylinder 32 in each guide groove 30 is fixed to one end, close to the rotating shaft 2, of each guide groove 30, in addition, the two guide blocks 31 are arranged, the two guide blocks 31 are connected with the end portions of piston rods of the two first cylinders 32 respectively, and each guide block 31 can slide along the corresponding guide groove 30. Meanwhile, the cleaning part comprises a connecting rod 33 and an arc-shaped strip 34, wherein one end of the side wall of the connecting rod 33 is fixedly connected to one side of the guide block 31 far away from the guide groove 30, the middle part of the side wall of the arc-shaped strip 34 is fixedly connected with one end of the connecting rod 33 far away from the guide block 31, and the integral arc center of the arc-shaped strip 34 is positioned on one side of the arc-shaped strip 34 close to the connecting rod 33.

Further, referring to fig. 1 and 2, a cleaning brush 35 is provided at a side wall of the arc-shaped bar 34 away from the connection bar 33. Meanwhile, in order to add the raw materials into the mixing drum 10, the yielding groove 4 is formed in the inner side wall of the mixing drum 10, the whole yielding groove 4 is arranged in an annular shape, and the yielding groove 4 is located at the top edge of the inner side wall of the mixing drum 10. Wherein, the arc strip 34 is matched with the abdicating groove 4 in a sliding and inserting way.

Meanwhile, in order to be able to drive the cleaning brush 35 to scrape off the raw material on the inner side wall of the mixing drum 10, a lifting assembly is arranged on the side wall of the mixing drum 10 and comprises two positioning plates 5 and two second cylinders 50, wherein the two positioning plates 5 are symmetrically arranged, the two positioning plates 5 are respectively positioned at two ends of the bearing plate 3, the extending directions of the two positioning plates 5 are perpendicular to the length direction of the bearing plate 3, in addition, the two second cylinders 50 are arranged, the two second cylinders 50 are respectively fixed on the side walls of the two positioning plates 5, and the second cylinder 50 on each positioning plate 5 is positioned at one side of the positioning plate 5 away from the mixing drum 10.

In addition, referring to fig. 1 and 2, two extending strips 6 are vertically disposed at two ends of the upper end surface of the supporting plate 3, and a protruding strip 60 is disposed at one end of the extending strip 6 away from the supporting plate 3, and the protruding strip 60 penetrates through the positioning plate 5 and is slidably connected with the positioning plate 5, wherein the protruding strip 60 penetrates through the bottom surface of one side of the supporting plate 3 and is connected with the piston rod of the second cylinder 50.

The during operation, the workman at first starts actuating mechanism 11, make actuating mechanism 11 drive the raw materials of stirring subassembly in to churn 10 and stir, then start two first cylinders 32, make two cleaning brushes 35 respectively from the roll-off in the groove 4 of stepping down under the drive of two first cylinders 32, start two second cylinders 50 simultaneously afterwards, drive bearing board 3 through two second cylinders 50 and wholly go up and down, in order further to drive two cleaning brushes 35 through the lift reciprocating motion of bearing board 3 and scrape the material to the inside wall of churn 10 simultaneously, thereby can will remain and fall in the quick scraping of the raw materials of churn 10 inside wall, the mesh that has improved the raw materials and has mixed the degree of consistency.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. A high-ductility concrete is characterized in that: the high-ductility concrete is prepared from the following raw materials in parts by weight:

coarse aggregate: 350-500 parts;

fine aggregate: 280-380 parts;

quartz sand: 180-300 parts;

cement: 210-255 parts;

water: 95-160 parts;

fly ash: 140-290 parts;

coumarone resin: 10-25 parts;

polyvinyl alcohol fibers: 23-38 parts;

permanganate: 5-16 parts of a stabilizer;

water reducing agent: 2-9 parts.

2. The high ductility concrete according to claim 1, wherein: the weight portion of the polyvinyl alcohol fiber is 28-33, the weight portion of the coumarone resin is 15-23, and the weight portion of the permanganate is 8-13.

3. The high ductility concrete according to claim 1, wherein: the coumarone resin has a viscosity of 80-90mPa · s.

4. The high ductility concrete according to claim 1, wherein: the permanganate is one of potassium permanganate, sodium permanganate and calcium permanganate.

5. The high ductility concrete according to any one of claims 1 to 4, wherein: the raw materials also comprise glass beads, and the weight parts of the glass beads are 85-100 parts.

6. The high ductility concrete according to claim 1, wherein: the water reducing agent is one of a lignosulfonate water reducing agent, a naphthalenesulfonate water reducing agent and a sulfamate high-efficiency water reducing agent.

7. The high ductility concrete according to claim 1, wherein: the particle size range of the fine aggregate is 1.5-3mm, and the particle size range of the coarse aggregate is 7.6-9.6 mm.

8. A method for preparing a high ductility concrete, for preparing a high ductility concrete according to any one of claims 1-4, 6-7, comprising the steps of:

9. The method of claim 8, wherein 85 to 100 parts by weight of glass beads are added in the first step.

10. An apparatus for preparing a high ductility concrete as claimed in any one of claims 1 to 7, characterized in that: including frame (1) and churn (10), be provided with the stirring subassembly in churn (10), be provided with actuating mechanism (11) that are used for driving the stirring subassembly on frame (1), the inner chamber of churn (10) is provided with the material subassembly of scraping that is used for clearing up churn (10) inside wall concrete, the lateral wall of churn (10) is provided with and is used for adjusting the lift subassembly of scraping the height at material subassembly place.