CN112358260A - Sand-free concrete brick and preparation method thereof - Google Patents
Sand-free concrete brick and preparation method thereof Download PDFInfo
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- CN112358260A CN112358260A CN202011372429.5A CN202011372429A CN112358260A CN 112358260 A CN112358260 A CN 112358260A CN 202011372429 A CN202011372429 A CN 202011372429A CN 112358260 A CN112358260 A CN 112358260A
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- China
- Prior art keywords
- sand
- parts
- free concrete
- concrete brick
- portland cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
Abstract
The invention discloses a sand-free concrete brick which comprises the following raw materials in parts by weight: 60-120 parts of Portland cement, 10-20 parts of stones and 23-46 parts of water. The invention has the beneficial effects that: the sand-free concrete brick has no fine aggregate, a large number of large pores exist in the concrete brick, and water can flow in the hardened sand-free concrete brick, so that the filtering effect is achieved, the drainage function is not influenced, the invasion of water stains and silt to a blind pipe is reduced, and the drainage efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to a sand-free concrete brick and a preparation method thereof.
Background
The sand-free concrete in the prior art consists of coarse aggregate and cement, and in the actual manufacturing and construction process, the sand-free concrete is found to be inconvenient to transport when being made into concrete materials, particularly in the remote transportation process, the sand-free concrete is already coagulated or semi-coagulated into concrete blocks and is difficult to use in a construction site, even if the sand-free concrete can be used, numerous problems can occur, such as poor forming quality, low structural strength, low water seepage efficiency and the like, particularly, the sand-free concrete has poor adaptability under different climatic conditions, and the engineering quality completed by the concrete materials is difficult to obtain acceptance and approval.
Disclosure of Invention
The invention aims to provide the sand-free concrete easy to seep water and the preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a sand-free concrete brick, which comprises the following raw materials in parts by weight: 60-120 parts of Portland cement, 10-20 parts of stones and 23-46 parts of water.
The sand-free concrete brick comprises the following raw materials in parts by weight as a preferred embodiment: 80-100 parts of Portland cement, 12-18 parts of stones and 30-40 parts of water.
The sand-free concrete brick comprises the following raw materials in parts by weight as a preferred embodiment: 90 parts of Portland cement, 15 parts of stones and 35 parts of water.
The raw material proportion of the sand-free concrete brick is controlled according to different particle sizes of stones and proper cement consumption selected, the stones are tightly packed, the density is calculated, the water consumption and the cement consumption are proper to the degree that the prepared cement paste can be uniformly attached to the surface of aggregate and presents oily luster without slurry flowing, and the water permeability of concrete is guaranteed.
The strength of the sand-free concrete is increased along with the increase of the cement dosage, but when the cement dosage is increased to a certain degree, all aggregate particles are uniformly wrapped by cement paste, so that the particles have similar metallic luster, the water consumption is required to be increased, and the situation is more prominent in the sand-free concrete with small particle size. When the cement is not used properly, the thickness and thickness of the cement paste layer on the surface of the aggregate particles are not proper, and the strength, the pore gland rate and the water permeability are affected.
The above-described sand-free concrete block, as a preferred embodiment, is one in which the portland cement is ordinary portland cement and/or portland slag cement.
The ordinary portland cement is a hydraulic cementing material prepared by grinding portland cement clinker, 5-20% of mixed materials and a proper amount of gypsum. The high-strength high-temperature-resistant high-temperature-.
The slag silicate cement is a hydraulic cementing material prepared by grinding silicate cement clinker, granulated blast furnace slag and a proper amount of gypsum, and the addition amount of the granulated blast furnace slag in the cement is 20-70% by weight. The slag is allowed to be replaced by one of mixed materials of limestone, kiln dust, fly ash and volcanic ash, the replacing amount is not more than 8% of the weight of the cement, and the granulated blast furnace slag in the replaced cement is not less than 20%.
In the above sand-free concrete brick, as a preferred embodiment, the stones are gravels with a particle size of 10-20mm or pebbles with a particle size of 10-20 mm.
Gravel refers to rocks or mineral debris having an average particle size of greater than 2mm and less than 64mm, and the geology defines natural rocks with smooth surfaces and no sharp corners as pebbles.
In a second aspect of the present application, there is provided a method for preparing a sand-free concrete brick, comprising the steps of:
(1) mixing and stirring the raw materials uniformly to obtain mixed slurry;
(2) placing a round pipe on the film, arranging a plurality of baffles along the length direction of the round pipe, pouring the mixed slurry between two adjacent baffles, trowelling the slurry, and naturally drying the slurry to obtain the sand-free concrete brick.
As a preferred embodiment, in the step (1), the mixing and stirring speed is 46-50r/min, and the stirring time under the condition is 100-140 s.
As a preferred embodiment, in the step (2), the baffle is shaped like a right triangle, one right-angle side of the baffle is recessed inwards to form an arc, and the arc is matched with the radian of the circular tube.
Because the arc on the baffle is identical with the radian of the round pipe, the baffle can form seamless connection with the round pipe, which is beneficial to the molding of the sand-free concrete brick.
In the above method for preparing a sand-free concrete brick, as a preferred embodiment, in the step (2), the distance between two adjacent baffles is 30-50 cm.
As a preferred embodiment, in the step (2), the diameter of the round tube is 100-120 mm.
Compared with the prior art, the invention has the beneficial effects that: the sand-free concrete brick has no fine aggregate, a large number of large pores exist in the concrete brick, and water can flow in the hardened sand-free concrete brick, so that the filtering effect is achieved, the drainage function is not influenced, the invasion of water stains and silt to a blind pipe is reduced, and the drainage efficiency is greatly improved.
The sand-free concrete brick provided by the invention has the advantages that as the sand-free concrete is made into a brick finished product, the quality of the sand-free concrete is not influenced by condensation and semi-condensation states in the transportation process, the water permeability of the sand-free concrete brick is reduced, and the sand-free concrete brick is convenient to transport and transport.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the examples of the present invention, 1 part by weight represents 1.
Example 1
A sand-free concrete brick comprises the following raw materials in parts by weight: 60 parts of Portland cement, 10 parts of stones and 23 parts of water;
the portland cement is ordinary portland cement;
the stones are gravels with the particle size of 10 mm;
the preparation method of the sand-free concrete brick comprises the following steps:
(1) mixing and stirring the raw materials for 140s under the condition that the stirring speed is 46r/min, and uniformly mixing and stirring to obtain mixed slurry;
(2) a round pipe with the diameter of 100mm is placed on the thin film, a plurality of baffles are arranged along the length direction of the round pipe, as a preferred embodiment, the baffles are in the shape of a right-angled triangle, one right-angled side of each baffle is inwards recessed to form an arc, the arcs are matched with the radian of the round pipe, and the distance between every two adjacent baffles is 30 cm;
and pouring the mixed slurry between two adjacent baffles, leveling, and naturally drying to obtain the sand-free concrete brick.
Example 2
A sand-free concrete brick comprises the following raw materials in parts by weight: 80 parts of Portland cement, 12 parts of stones and 30 parts of water;
the portland cement is ordinary portland cement;
the stones are gravels with the particle size of 12 mm;
the preparation method of the sand-free concrete brick comprises the following steps:
(1) mixing and stirring the raw materials for 120s at the stirring speed of 48r/min, and uniformly mixing and stirring to obtain mixed slurry;
(2) a round pipe with the diameter of 110mm is placed on the thin film, a plurality of baffles are arranged along the length direction of the round pipe, as a preferred embodiment, the baffles are in the shape of a right-angled triangle, one right-angled side of each baffle is inwards recessed to form an arc, the arcs are matched with the radian of the round pipe, and the distance between every two adjacent baffles is 35 cm;
and pouring the mixed slurry between two adjacent baffles, leveling, and naturally drying to obtain the sand-free concrete brick.
Example 3
A sand-free concrete brick comprises the following raw materials in parts by weight: 90 parts of Portland cement, 15 parts of stones and 35 parts of water;
the portland cement is slag portland cement;
the stones are gravels with the particle size of 15 mm;
the preparation method of the sand-free concrete brick comprises the following steps:
(1) mixing and stirring the raw materials for 140s under the condition that the stirring speed is 46r/min, and uniformly mixing and stirring to obtain mixed slurry;
(2) a round pipe with the diameter of 110mm is placed on the thin film, a plurality of baffles are arranged along the length direction of the round pipe, as a preferred embodiment, the baffles are in the shape of a right-angled triangle, one right-angled side of each baffle is inwards recessed to form an arc, the arcs are matched with the radian of the round pipe, and the distance between every two adjacent baffles is 40 cm;
and pouring the mixed slurry between two adjacent baffles, leveling, and naturally drying to obtain the sand-free concrete brick.
Example 4
A sand-free concrete brick comprises the following raw materials in parts by weight: 100 parts of Portland cement, 18 parts of stones and 40 parts of water;
the portland cement is a mixture of ordinary portland cement and slag portland cement;
the stones are pebbles with the grain diameter of 18 mm;
the preparation method of the sand-free concrete brick comprises the following steps:
(1) mixing and stirring the raw materials for 100s at the stirring speed of 48r/min, and uniformly mixing and stirring to obtain mixed slurry;
(2) a round pipe with the diameter of 110mm is placed on the film, a plurality of baffles are arranged along the length direction of the round pipe, as a preferred embodiment, the baffles are in the shape of a right-angled triangle, one right-angled side of each baffle is inwards recessed to form an arc, the arcs are matched with the radian of the round pipe, and the distance between every two adjacent baffles is 45 cm;
and pouring the mixed slurry between two adjacent baffles, leveling, and naturally drying to obtain the sand-free concrete brick.
Example 5
A sand-free concrete brick comprises the following raw materials in parts by weight: 120 parts of Portland cement, 20 parts of stones and 46 parts of water;
the portland cement is slag portland cement;
the stones are pebbles with the particle size of 20 mm;
the preparation method of the sand-free concrete brick comprises the following steps:
(1) mixing and stirring the raw materials for 100s at a stirring speed of 50r/min, and uniformly mixing and stirring to obtain mixed slurry;
(2) a round pipe with the diameter of 120mm is placed on the thin film, a plurality of baffles are arranged along the length direction of the round pipe, as a preferred embodiment, the baffles are in the shape of a right-angled triangle, one right-angled side of each baffle is inwards recessed to form an arc, the arcs are matched with the radian of the round pipe, and the distance between every two adjacent baffles is 50 cm;
and pouring the mixed slurry between two adjacent baffles, leveling, and naturally drying to obtain the sand-free concrete brick.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The sand-free concrete brick is characterized by comprising the following raw materials in parts by weight: 60-120 parts of Portland cement, 10-20 parts of stones and 23-46 parts of water.
2. The sand-free concrete brick as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 80-100 parts of Portland cement, 12-18 parts of stones and 30-40 parts of water.
3. The sand-free concrete brick as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 90 parts of Portland cement, 15 parts of stones and 35 parts of water.
4. A sand-free concrete block as claimed in claim 1, wherein said portland cement is ordinary portland cement and/or portland slag cement.
5. The sand-free concrete brick as claimed in claim 1, wherein the stones are gravels having a particle size of 10-20mm or pebbles having a particle size of 10-20 mm.
6. A method of making a sand-free concrete block as claimed in any one of claims 1 to 5, comprising the steps of:
(1) mixing and stirring the raw materials uniformly to obtain mixed slurry;
(2) placing a round pipe on the film, arranging a plurality of baffles along the length direction of the round pipe, pouring the mixed slurry between two adjacent baffles, trowelling the slurry, and naturally drying the slurry to obtain the sand-free concrete brick.
7. The method for preparing a sand-free concrete brick as claimed in claim 6, wherein in the step (1), the mixing and stirring speed is 46-50r/min, and the stirring time under the condition is 100-.
8. The method for preparing a sand-free concrete brick as claimed in claim 6, wherein in the step (2), the baffle plate is in the shape of a right triangle, one right-angle side of the baffle plate is recessed inwards to form an arc, and the arc is matched with the radian of the round pipe.
9. The method for preparing a sand-free concrete brick as claimed in claim 6, wherein in the step (2), the distance between two adjacent baffles is 30-50 cm.
10. The method as claimed in claim 6, wherein the diameter of the round tube in step (2) is 100-120 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372429.5A CN112358260A (en) | 2020-11-30 | 2020-11-30 | Sand-free concrete brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372429.5A CN112358260A (en) | 2020-11-30 | 2020-11-30 | Sand-free concrete brick and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112358260A true CN112358260A (en) | 2021-02-12 |
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| CN202011372429.5A Pending CN112358260A (en) | 2020-11-30 | 2020-11-30 | Sand-free concrete brick and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001205241A (en) * | 2000-01-26 | 2001-07-31 | Nagasaki Prefecture | Method for solidifying incineration ash |
| CN102503251A (en) * | 2011-10-10 | 2012-06-20 | 中国水利水电第五工程局有限公司 | Environmentally-friendly no-fines concrete prepared by using aggregate with extra large particle size |
| CN103242009A (en) * | 2013-06-03 | 2013-08-14 | 中铁上海工程局有限公司 | Water permeable material non-fine concrete block for bridge abutment and manufacturing process for non-fine concrete block |
| CN106278021A (en) * | 2016-07-29 | 2017-01-04 | 兰州理工大学 | Lightweight aggregate non-fine concrete and preparation method thereof |
-
2020
- 2020-11-30 CN CN202011372429.5A patent/CN112358260A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001205241A (en) * | 2000-01-26 | 2001-07-31 | Nagasaki Prefecture | Method for solidifying incineration ash |
| CN102503251A (en) * | 2011-10-10 | 2012-06-20 | 中国水利水电第五工程局有限公司 | Environmentally-friendly no-fines concrete prepared by using aggregate with extra large particle size |
| CN103242009A (en) * | 2013-06-03 | 2013-08-14 | 中铁上海工程局有限公司 | Water permeable material non-fine concrete block for bridge abutment and manufacturing process for non-fine concrete block |
| CN106278021A (en) * | 2016-07-29 | 2017-01-04 | 兰州理工大学 | Lightweight aggregate non-fine concrete and preparation method thereof |
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Application publication date: 20210212 |
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