阅读说明：本技术 一种高抗冻融海工混凝土及其制备方法 (High-freeze-thaw resistance marine concrete and preparation method thereof ) 是由 陈喜旺 张登平 *** 王军 孔凡敏 王丽丽 李燕伟 王杰之 张弯 李威 于 2019-11-16 设计创作，主要内容包括：本发明公开了一种高抗冻融海工混凝土及其制备方法,涉及海工混凝土技术领域,抗冻融海工混凝土包括A组分和B组分,A组分包括硅酸盐水泥、碎石、黄砂以及减水剂；B组分为碳化硅改性水玻璃。其制备方法包括按配比准备A组分,并将A组分投入搅拌舱中进行充分搅拌；称取水玻璃和碳化硅粉末投入反应舱中,水浴条件下充分反应得到B组分；常温条件下A组分和B组分充分搅拌0.5-1h得到最终产品。本发明的抗冻融海工混凝土具有提高海工混凝土抗冻融性能的优点,另外,本发明的制备方法具有提高抗冻融海工混凝土抗压强度的优点。(The invention discloses high freeze-thaw resistance marine concrete and a preparation method thereof, and relates to the technical field of marine concrete, wherein the freeze-thaw resistance marine concrete comprises a component A and a component B, wherein the component A comprises portland cement, crushed stone, yellow sand and a water reducing agent; the component B is silicon carbide modified water glass. The preparation method comprises preparing component A according to a ratio, and adding component A into a stirring cabin for fully stirring; weighing water glass and silicon carbide powder, putting into a reaction cabin, and fully reacting under a water bath condition to obtain a component B; and fully stirring the component A and the component B for 0.5 to 1 hour at normal temperature to obtain a final product. The freeze-thaw resistant marine concrete has the advantage of improving the freeze-thaw resistance of the marine concrete, and in addition, the preparation method has the advantage of improving the compressive strength of the freeze-thaw resistant marine concrete.)

1. The high-freeze-thaw resistance marine concrete is characterized in that: the mass ratio of the components is 50-200: 1, wherein the component A is prepared from the following raw materials in parts by weight: 4-5 parts of portland cement, 10-12 parts of broken stone, 6-8 parts of yellow sand and 0.05-0.1 part of a water reducing agent; the component B is silicon carbide modified water glass.

2. The high freeze-thaw resistance marine concrete according to claim 1, wherein: the water reducing agent comprises one or a combination of more of polycarboxylate, lignosulfonate and sulfonated melamine formaldehyde resin.

3. A method of preparing freeze-thaw resistant marine concrete according to any one of claims 1-2, comprising the steps of: preparing a component A according to a ratio, and putting the component A into a concrete preparation kiln; the concrete preparation kiln comprises a reaction cabin (1) and a stirring cabin (2) fixed at the bottom of the reaction cabin (1); under the condition of normal temperature, fully stirring the component A in the stirring cabin (2);

weighing the materials in a mass ratio of 100-120: 1, putting the water glass and the silicon carbide powder into the reaction cabin (1), and fully reacting in a water bath at the temperature of 60-75 ℃ to obtain a component B;

and opening a blanking valve (3) arranged at the bottom of the reaction cabin (1) to enable the component B to fall into the stirring cabin (2), and fully stirring the component A and the component B for 0.5-1h at normal temperature to obtain a final product.

4. The preparation method of the high freeze-thaw resistance marine concrete according to claim 3, wherein the preparation method comprises the following steps: the reaction cabin (1) comprises an outer shell (11) and an annular inner wall (12) fixed on the inner top surface of the outer shell (11); the annular inner wall (12) divides the space in the outer shell (11) into a circular inner cavity (13) and an annular outer cavity (14); a blanking valve (3) used for preventing materials from falling into the stirring cabin (2) is arranged on the inner circumferential surface of the annular inner wall (12); the bottom of the blanking valve (3) is provided with a stirring component (4); a water bath cabin (5) is fixed on the outer peripheral surface of the annular inner wall (12); a hot water inlet pipe (111) and a cold water inlet pipe (112) for injecting water into the water bath cabin (5) and a water outlet pipe (113) for discharging water flow out of the water bath cabin (5) are respectively arranged on the outer peripheral surface of the outer shell (11) in a penetrating manner; an annular baffle (51) is rotatably mounted in the water bath cabin (5), and a driving device (6) for driving the annular baffle (51) to rotate is arranged in the outer shell (11);

the stirring assembly (4) comprises a motor mounting box (41) fixed at the bottom of the blanking valve (3), a motor (42) mounted in the motor mounting box (41) and a stirring shaft (43) fixedly connected with the output end of the motor (42).

5. The preparation method of the high freeze-thaw resistance marine concrete according to claim 4, wherein the preparation method comprises the following steps: the driving device (6) comprises an annular through hole (61) formed in the outer peripheral surface of the water bath cabin (5), a first bevel gear ring (62) fixed on the outer peripheral surface of the annular baffle plate (51), a transmission bevel gear (63) rotatably installed on the inner peripheral surface of the outer shell (11), a second bevel gear ring (64) rotatably installed at the bottom of the annular outer cavity (14), a driven gear (65) fixed on one side, far away from the annular through hole (61), of the transmission bevel gear (63), and a driving gear (66) rotatably installed on the outer peripheral surface of the stirring cabin (2); the first conical tooth ring (62) is rotatably arranged in the annular through hole (61); the transmission bevel gear (63) is meshed with the first bevel gear ring (62) and the second bevel gear ring (64) respectively; the driven gear (65) is meshed with the driving gear (66); and a transmission mechanism (7) for driving the driving gear (66) to rotate is arranged between the driving gear (66) and the motor (42).

6. The preparation method of the high freeze-thaw resistance marine concrete according to claim 5, wherein the preparation method comprises the following steps: the transmission mechanism (7) comprises a limiting circular tube (71) fixed on the inner circumferential surface of the stirring cabin (2), a gear mounting box (72) fixed at the bottom of the motor mounting box (41), a driving bevel gear (73) fixed on the outer circumferential surface of the stirring shaft (43) and a driven bevel gear (74) rotatably mounted on one side, close to the limiting circular tube (71), of the gear mounting box (72); an internal threaded pipe (75) is fixed on one side of the driven bevel gear (74) close to the driving gear (66); the driving bevel gear (73) is meshed with the driven bevel gear (74); the internal thread pipe (75) is internally connected with a threaded shaft (76), and a guide assembly for driving the threaded shaft (76) to move axially along the internal thread pipe (75) is arranged between the threaded shaft (76) and the limiting circular pipe (71).

7. The preparation method of the high freeze-thaw resistance marine concrete according to claim 6, wherein the preparation method comprises the following steps: the guide assembly comprises an extension shaft (79) fixed at one end, far away from the driven bevel gear (74), of the threaded shaft (76), a square limiting sheet (77) fixed on the outer peripheral surface of the extension shaft (79), a strip-shaped through hole (711) formed in the inner peripheral surface of the limiting circular tube (71), a circular through hole (78) formed in one side, close to the limiting circular tube (71), of the driving gear (66), and a limiting groove (781) formed in the side wall of the circular through hole (78) and used for being plugged with the square limiting sheet (77); the square limiting sheet (77) is connected with the strip-shaped through hole (711) in a sliding mode along the axial direction of the limiting circular tube (71).

8. The preparation method of the high freeze-thaw resistance marine concrete according to claim 6, wherein the preparation method comprises the following steps: the blanking valve (3) comprises a fixing ring (31) fixed on the inner circumferential surface of the annular inner wall (12), supporting columns (33) fixedly connected with the inner circumferential surface of the fixing ring (31), and a plurality of rotating shafts (35) uniformly distributed on the outer circumferential surface of the supporting columns (33) along the circumferential direction of the supporting columns (33); a fan-shaped baffle (34) is fixed on the peripheral surface of each rotating shaft (35), and a baffle bevel gear (36) is fixed at one end, far away from the supporting column (33), of each rotating shaft (35); the inner bottom surface of the annular outer cavity (14) is rotatably provided with an inner conical tooth ring (37), the outer peripheral surface of the inner conical tooth ring (37) is fixedly connected with the inner peripheral surface of a second conical tooth ring (64), and the baffle bevel gear (36) is meshed with the inner conical tooth ring (37).

Technical Field

The invention relates to the technical field of marine concrete, in particular to high freeze-thaw resistance marine concrete and a preparation method thereof.

Background

At present, marine concrete mostly refers to concrete used in ocean engineering, and is used in structures frequently subjected to spray impact.

Disclosure of Invention

Aiming at the defects in the prior art, the first object of the invention is to provide the high freeze-thaw resistance marine concrete which has the advantage of improving the freeze-thaw resistance of the marine concrete.

The second purpose of the invention is to provide a preparation method of the high freeze-thaw resistance marine concrete, which has the advantage of improving the compressive strength of the freeze-thaw resistance marine concrete.

In order to achieve the first object, the invention provides the following technical scheme:

the high-freeze-thaw resistance marine concrete is prepared from the following components in parts by mass of 50-200: 1, wherein the component A is prepared from the following raw materials in parts by weight: 4-5 parts of portland cement, 10-12 parts of broken stone, 6-8 parts of yellow sand and 0.05-0.1 part of a water reducing agent; the component B is silicon carbide modified water glass.

Through adopting above-mentioned technical scheme, the silicic acid gel that precipitates when sodium silicate hardens can block up the inside space of concrete to change the pore structure of concrete, reduce the heat conductivility of concrete through changing pore structure, thereby reduce the influence of ambient temperature to the concrete, improve the freeze-thaw resistance ability of concrete. By adding the silicon carbide into the water glass, the quality of the water glass in unit volume is improved, and the filling degree of the water glass to the concrete pore structure is enhanced.

The invention is further configured to: the water reducing agent comprises one or a combination of more of polycarboxylate, lignosulfonate and sulfonated melamine formaldehyde resin.

By adopting the technical scheme and adding the water reducing agent, the possibility of influence on concrete slump caused by adding the silicon carbide modified water glass into the mixed material can be reduced

In order to achieve the second object, the invention provides the following technical scheme:

a preparation method of high freeze-thaw resistance marine concrete comprises the following steps: preparing a component A according to a ratio, and putting the component A into a concrete preparation kiln; the concrete preparation kiln comprises a reaction cabin and a stirring cabin fixed at the bottom of the reaction cabin; fully stirring the component A in the stirring cabin at normal temperature;

weighing the materials in a mass ratio of 100-120: 1, putting the water glass and the silicon carbide powder into the reaction cabin, and fully reacting in a water bath at 60-75 ℃ to obtain a component B;

and opening a blanking valve arranged at the bottom of the reaction cabin to enable the component B to fall into the stirring cabin, and fully stirring the component A and the component B for 0.5-1h at normal temperature to obtain a final product.

By adopting the technical scheme, the reaction between the silicon carbide and the water glass is carried out under the water bath condition, the water glass is partially cured by heating, the whole moisture content of the mixed water glass and concrete is reduced, and the compressive strength and the flexural strength of the final product are improved.

The invention is further configured to: the reaction cabin comprises an outer shell and an annular inner wall fixed on the inner top surface of the outer shell; the annular inner wall divides the space in the outer shell into a circular inner cavity and an annular outer cavity; a blanking valve used for preventing materials from falling into the stirring cabin is arranged on the inner circumferential surface of the annular inner wall; the bottom of the blanking valve is provided with a stirring component; a water bath cabin is fixed on the outer peripheral surface of the annular inner wall; a hot water inlet pipe and a cold water inlet pipe for injecting water into the water bath cabin and a water outlet pipe for discharging water flow out of the water bath cabin are respectively arranged on the outer peripheral surface of the outer shell in a penetrating manner; an annular baffle is rotatably arranged in the water bath cabin, and a driving device for driving the annular baffle to rotate is arranged in the outer shell;

the stirring assembly comprises a motor mounting box fixed at the bottom of the blanking valve, a motor arranged in the motor mounting box and a stirring shaft fixedly connected with the output end of the motor.

Through adopting above-mentioned technical scheme, throw into silicon carbide powder and water glass respectively and react the under-deck, hot water inlet tube pours into hot water into to the water bath under-deck into, and after the reaction, the result falls into the stirring under-deck by the unloading valve. The cold water inlet pipe injects cold water into the water bath cabin, so that the water bath cabin is cooled, the reaction of the silicon carbide and the water glass is facilitated to be carried out under the water bath condition, the integral moisture content of the mixed water glass and concrete is reduced, and the compressive strength and the flexural strength of a final product are improved.

The invention is further configured to: the driving device comprises an annular through hole formed in the outer peripheral surface of the water bath cabin, a first bevel gear ring fixed on the outer peripheral surface of the annular baffle, a transmission bevel gear rotatably arranged on the inner peripheral surface of the outer shell, a second bevel gear ring rotatably arranged at the bottom of the annular outer cavity, a driven gear fixed on one side of the transmission bevel gear, which is far away from the annular through hole, and a driving gear rotatably arranged on the outer peripheral surface of the stirring cabin; the first bevel gear ring is rotatably arranged in the annular through hole; the transmission bevel gear is meshed with the first bevel gear ring and the second bevel gear ring respectively; the driven gear is meshed with the driving gear; and a transmission mechanism for driving the driving gear to rotate is arranged between the driving gear and the motor.

By adopting the technical scheme, after the transmission mechanism drives the driving gear to rotate, the driving gear drives the first bevel gear ring and the second bevel gear ring to rotate respectively through the transmission bevel gear. The first conical tooth ring drives the annular baffle to rotate, and the opening and closing states of the hot water inlet pipe, the cold water inlet pipe and the water outlet pipe are convenient to adjust through the rotation of the annular baffle, so that water injection and drainage of the water bath cabin are convenient.

The invention is further configured to: the transmission mechanism comprises a limiting circular pipe fixed on the inner circumferential surface of the stirring cabin, a gear mounting box fixed at the bottom of the motor mounting box, a driving bevel gear fixed on the outer circumferential surface of the stirring shaft and a driven bevel gear rotatably mounted on one side, close to the limiting circular pipe, of the gear mounting box; an internal threaded pipe is fixed on one side of the driven bevel gear, which is close to the driven gear; the driving bevel gear is meshed with the driven bevel gear; the internal thread pipe internal thread is connected with the screw thread axle, be provided with the direction subassembly that drive screw thread axle removed along internal thread pipe axial between screw thread axle and the spacing pipe.

Through adopting above-mentioned technical scheme, the motor drives the (mixing) shaft and rotates the in-process, and initiative bevel gear drives driven bevel gear and rotates, and driven bevel gear drives the internal thread pipe and rotates. The threaded shaft moves towards one side close to the driving gear under the guiding action of the guiding assembly. Through setting up transmission device, the motor of being convenient for drives the driving gear and rotates when control (mixing) shaft pivoted.

The invention is further configured to: the guide assembly comprises an extension shaft fixed at one end of the threaded shaft, which is far away from the driven bevel gear, a square limiting piece fixed on the outer peripheral surface of the extension shaft, a strip-shaped through hole formed in the inner peripheral surface of a limiting circular tube, a circular through hole formed in one side, which is close to the limiting circular tube, of the driving gear, and a limiting groove formed in the side wall of the circular through hole and used for being plugged with the square limiting piece; the square limiting piece is connected with the strip-shaped through hole in a sliding mode along the axial direction of the limiting circular tube.

Through adopting above-mentioned technical scheme, the threaded spindle contacts with spacing pipe, and the bar through-hole provides the guide effect for square spacing piece to make the internal thread pipe rotate the in-process drive screw axial and be close to driving gear one side and remove. After the square limiting piece moves to be inserted into the limiting groove, the threaded shaft rotates along with the internal threaded pipe, and the threaded shaft drives the driving gear to rotate through the square limiting piece. The moving direction of the threaded shaft is convenient to adjust through the turning of the motor, and the water injection and drainage conditions in the water bath cabin are adjusted under the condition that the stirring shaft does not stop rotating.

The invention is further configured to: the blanking valve comprises a fixing ring fixed on the inner peripheral surface of the annular inner wall, a supporting column fixedly connected with the inner peripheral surface of the fixing ring and a plurality of rotating shafts uniformly distributed on the outer peripheral surface of the supporting column along the circumferential direction of the supporting column; a fan-shaped baffle is fixed on the peripheral surface of each rotating shaft, and a baffle bevel gear is fixed at one end of each rotating shaft, which is far away from the support column; the inner bottom surface of the annular outer cavity is rotatably provided with an inner conical toothed ring, the outer peripheral surface of the inner conical toothed ring is fixedly connected with the inner peripheral surface of the second conical toothed ring, and the baffle bevel gear is meshed with the inner conical toothed ring.

Through adopting above-mentioned technical scheme, the second taper ring rotates the back and drives interior taper ring and rotate, and interior taper ring drives baffle bevel gear and rotates, and baffle bevel gear passes through the axis of rotation and drives fan-shaped baffle rotation, is convenient for make the material in the reaction chamber fall to the stirring cabin after the fan-shaped baffle upset in, the motor of being convenient for drives the opening of (mixing) shaft pivoted in-process realization unloading valve to fall to the stirring cabin after realizing that water glass and carborundum react and mix with A component.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. by adding water glass, the pore structure of the concrete is changed, and the freeze-thaw resistance of the concrete is improved;

2. silicon carbide is added into the water glass, so that the quality of the water glass in unit volume is improved, and the filling degree of the water glass to a concrete pore structure is enhanced;

3. the water glass is partially solidified by heating, so that the whole moisture content of the mixed water glass and concrete is reduced, and the compressive strength and the flexural strength of a final product are improved.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of a highlighted annular baffle of the present invention;

FIG. 3 is a cross-sectional view of the highlighting transfer mechanism of the present invention;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic view showing the structure of the blanking valve of the present invention.

In the figure: 1. a reaction cabin; 11. an outer housing; 111. a hot water inlet pipe; 112. a cold water inlet pipe; 113. a water outlet pipe; 12. an annular inner wall; 13. a circular inner cavity; 14. an annular outer cavity; 2. a stirring chamber; 3. a discharge valve; 31. a fixing ring; 32. a support bar; 33. a support pillar; 34. a fan-shaped baffle plate; 35. a rotating shaft; 36. a baffle bevel gear; 37. an inner tapered toothed ring; 4. a stirring assembly; 41. a motor mounting box; 42. a motor; 43. a stirring shaft; 5. a water bath cabin; 51. an annular baffle; 6. a drive device; 61. an annular through hole; 62. a first bevel ring; 63. a drive bevel gear; 64. a second conical gear ring; 65. a driven gear; 66. a driving gear; 67. a feed through hole; 7. a transport mechanism; 71. a limiting circular tube; 711. a strip-shaped through hole; 72. a gear mounting box; 73. a drive bevel gear; 74. a driven bevel gear; 75. an internally threaded tube; 751. a spring; 752. a circular limiting sheet; 76. a threaded shaft; 77. a square limiting sheet; 78. a circular through hole; 781. a limiting groove; 79. an extension shaft.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.