Fabricated concrete brick based on machine-made sand material and preparation method of fabricated concrete brick

A technology of concrete bricks and machine-made sand, which is applied to building materials, manufacturing tools, ceramic molding machines, etc., can solve problems such as increased environmental pressure, concrete bricks are easy to separate from each other, and wall damage, so as to improve pressure resistance and durability Impact resistance, avoiding the risk of aging and falling off, reducing weight and cost

A technology of concrete bricks and machine-made sand, which is applied to building materials, manufacturing tools, ceramic molding machines, etc., can solve problems such as increased environmental pressure, concrete bricks are easy to separate from each other, and wall damage, so as to improve pressure resistance and durability Impact resistance, avoiding the risk of aging and falling off, reducing weight and cost

CN113152777AActive Publication Date: 2021-07-23ANHUI INST OF BUILDING RES & DESIGN +1
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  • Fabricated concrete brick based on machine-made sand material and preparation method of fabricated concrete brick
  • Fabricated concrete brick based on machine-made sand material and preparation method of fabricated concrete brick
  • Fabricated concrete brick based on machine-made sand material and preparation method of fabricated concrete brick

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Please refer to Figure 1-4 , this embodiment provides a prefabricated concrete brick based on machine-made sand material, including:

[0038] A brick body 1, the two ends of the brick body 1 are respectively provided with a mortise and tenon structure for splicing. The tenon and tenon structure in this embodiment includes a male tenon strip 2 and a female tenon groove 3 respectively arranged at the two ends of the brick body. The male tenon bar 2 includes three slide bars 21 set through the upper and lower surfaces at one end of the brick body, and the female tenon groove 3 includes three slide grooves 31 matched with the slide bars at the other end of the brick body through the upper and lower surfaces. Bar 21 is rectangular, and of course trapezoidal or dovetail shape can also be used, and will not be repeated here;

[0039] In the present embodiment, the brick body 1 is provided with a number of inserts 4 at intervals in the middle of its lower surface, and on its ...

Embodiment 2

[0045] This embodiment provides a formula component of the concrete brick in Embodiment 1, including: 250-350 parts of cement, 30-80 parts of fly ash, 30-80 parts of gneiss machine-made sandstone powder, and 600-840 parts of machine-made sand 800-1000 parts of mechanism coarse aggregate, 230-270 parts of water, 1-2 parts of early strength agent, 6-8 parts of modifier, 3-7 parts of bentonite, 25-50 parts of steel fiber, 2 parts of polypropylene fiber -6 parts, metakaolin 30-60 parts, water reducer 5-10 parts, cellulose ether 0.2-0.5 parts.

[0046] Within the value range of this embodiment, we can arbitrarily carry out the proportioning of components, but as the most preferred mass ratio of our selected fly ash and gneiss machine-made sandstone powder is 1:1, at this time stone powder powder The proportion of coal ash can reduce the heat of hydration in the concrete curing process, thereby reducing or even eliminating the cracks in the concrete curing process. Wide and its own...

Embodiment 3

[0051] The present embodiment provides a kind of method for preparing the concrete brick as embodiment 1, comprises the following steps:

[0052] A, prepare raw material according to the composition ratio in embodiment 2;

[0053] b. Prepare hydrogen peroxide, acetic acid, and water as a pretreatment solution in a weight ratio of 10:2:120, put the machine-made sand into the pretreatment solution for immersion treatment for 15-25 minutes, and then filter the pretreated sand Spray a coupling agent solution of about 2-3% of the mass of the aggregate, stir evenly, and dry in an oven at 160°C for 2 hours to obtain modified machine-made sand, wherein the weight percentage of the silane coupling agent in the coupling agent solution is 4-6 %, and adjust the pH of the coupling agent solution to 4.5-5.5 with acid;

[0054] c. Stir cement, fly ash, and gneiss machine-made sandstone powder in a forced mixer for 2-5 minutes to obtain mixture A, and add modified machine-made sandstone, pol...

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Abstract

The invention relates to the field of building materials, in particular to a fabricated concrete brick based on a machine-made sand material and a preparation method of the fabricated concrete brick. Mortise and tenon joint structures used for splicing are arranged at the two ends of the concrete brick; a plurality of inserting blocks and inserting grooves are formed in the middles of the lower surface and the upper surface of the concrete brick at intervals; a plurality of vertical through holes are formed in one side of each inserting block at intervals in a penetrating mode; an additional material insertion cavity is formed in the other side of each inserting block; flash grooves are formed around the inserting grooves; a plurality of transverse through holes are formed in the sides, close to the vertical through holes, of the two end faces of a brick body in a penetrating mode from top to bottom at intervals; and the transverse through holes communicate with the vertical through holes. On one hand, rapid connection and splicing of concrete bricks are achieved, and the concrete brick is high in positioning precision, stable and compact in connection and suitable for later expansion construction; and on the other hand, the provided preparation method guarantees the strength of the brick body, and the concrete brick is light in weight, high in compressive strength, good in bearing capacity and easy to install and operate, and has the practical effect in a practical sense.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an assembled concrete brick based on machine-made sand material and a preparation method thereof. Background technique [0002] At present, my country's building energy conservation uses concrete bricks to replace clay red bricks. However, during the application process, the walls made of porous bricks have separation, hollowing, and step-like cracks on some walls due to insufficient connection fastness. In addition, the existing concrete bricks are fixedly connected by concrete, but the existing concrete brick structure is relatively square, and when subjected to a large external force, the concrete bricks are easy to separate from each other, resulting in damage to the wall to a certain extent. To a certain extent, it affects the overall quality of the construction project and the popularization and application of concrete bricks, especially in some applications that n...

Claims

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Application Information

Patent Timeline
23 Jul 2021
Publication
CN113152777A
IPC
E04C1/41; E04C1/00; E04C1/39; E04B2/46; C04B28/00; B28B1/087; B28B7/38
CPC
E04C1/41; E04C1/00; E04C1/39; E04B2/46; C04B28/00; B28B1/087; B28B7/386; B28B7/388
Inventors
乐腾胜; 陈慧