A type of crack-resistant aerated concrete block

Abstract

This utility model relates to the field of concrete block technology and is a crack-resistant aerated concrete block. It includes a block body with longitudinal receiving grooves at both the top and bottom, and transverse receiving grooves on both sides. The depth of the longitudinal and transverse receiving grooves is approximately 1 cm, and the edge of the longitudinal receiving groove is approximately 2 cm from the edge of its end face. A fixing notch is formed at the top of the transverse receiving groove, extending to the upper end face of the block body. This utility model fills the longitudinal and transverse receiving grooves with cement mortar used for longitudinal and transverse connection of the block body. After the cement mortar hardens, the joints are not exposed on the wall surface, thus reducing the impact of external environmental factors and slowing down the aging rate of the cement mortar after hardening. This prevents cracking at the joints of the wall built from the block body and improves the strength of the wall.

Description

Technical Field

[0001] This utility model relates to the field of concrete block technology, and in particular to a crack-resistant aerated concrete block. Background Technology

[0002] Autoclaved aerated concrete (AAC) blocks are a new type of wall material. Their main components include cement, sand, fly ash, quicklime, and slag. They have the advantages of being green and environmentally friendly, and therefore have been widely used in construction projects, mainly for building envelopes and firewalls.

[0003] In actual use, concrete blocks are neatly stacked and piled together according to design requirements. During the stacking process, cement mortar is used to bond the joints. After the cement mortar solidifies, the blocks are firmly connected into a whole, thus forming a solid wall.

[0004] In the prior art, the common concrete blocks are roughly in the shape of a regular cube, such as the aerated concrete blocks with the announcement number CN203334510U. After being stacked into a wall, the joints between the blocks will form a grid-like pattern on the wall.

[0005] Sometimes the exterior of the wall is painted to cover the joints, but some walls are not painted, which leaves the hardened cement mortar at the joints exposed. Especially for outdoor walls, which are exposed to wind and sun, the cement mortar, which acts as an adhesive, has lower strength after hardening than the blocks themselves. Long-term exposure to the outside can easily cause aging, leading to cracks at the joints between the blocks and a reduction in the strength of the wall. Utility Model Content

[0006] To address the problem of exposed cement mortar joints aging easily, as mentioned in the background section, this utility model provides the following technical solution:

[0007] A crack-resistant aerated concrete block includes a block body. The top and bottom of the block body are provided with longitudinal receiving grooves, and the sides of the block body are provided with transverse receiving grooves. The depth of the longitudinal and transverse receiving grooves is about 1 cm. The edge of the longitudinal receiving groove is about 2 cm away from the edge of its end face. The top of the transverse receiving groove is provided with a fixing notch, and the top of the fixing notch extends to the upper end face of the block body.

[0008] Furthermore, a transport groove is provided on the inner wall of the transverse receiving groove, allowing fingers to be inserted into the transport groove for easy transport of the concrete block.

[0009] Furthermore, a buffer strip is provided inside the upper longitudinal receiving groove. The buffer strip is located in the middle of the longitudinal receiving groove and is made of cement mortar. However, compared with ordinary cement mortar, the sand content in the cement mortar of the buffer strip is greatly increased.

[0010] Furthermore, the block body includes a core, inside which is provided a moisture-proof board and two metal meshes distributed vertically. The moisture-proof board is a thin sheet made of metal and is located on the front side of the metal meshes. Erasable markings are made on the front side of the block body to distinguish the direction of the moisture-proof board.

[0011] Furthermore, the core body has two rows of steel bars inside, the bottom ends of the steel bars extend to the bottom of the block body, and the steel bars pass through the mesh of the metal mesh. Two rows of insertion interfaces are opened on the inner wall of the longitudinal receiving groove above, and the insertion interfaces correspond one-to-one with the steel bars, and the insertion interfaces are located directly above the corresponding steel bars.

[0012] Furthermore, the outer end of the core body is provided with a wrapping layer, which includes a pigment layer fixedly disposed on the outer end of the core body. The pigment layer is made by adding red pigment to the raw material of the core body. An outer protective layer is fixedly disposed on the outer end of the pigment layer, and the material of the outer protective layer is exactly the same as that of the core body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By filling the longitudinal and transverse receiving grooves with cement mortar used for longitudinal and transverse connection of the main block body, the joints of the cement mortar after solidification will not be exposed on the wall surface, so they will be less affected by the external environment, thereby slowing down the aging speed of the cement mortar after solidification, avoiding cracking of the wall built by the main block body at the joints, and improving the strength of the wall.

[0015] 2. By setting up fragile buffer strips, the cement mortar is compacted by tapping the buffer strips during the process of building the main block. The buffer strips buffer the force of the tapping, which can ensure sufficient tapping and full contact between the mortar and the main block, while avoiding damage to the main block due to the tapping. Attached Figure Description

[0016] Figure 1 This is a top view of the structure of this utility model;

[0017] Figure 2 This is a bottom view of the structure of this utility model;

[0018] Figure 3 This is a diagram showing the internal structure of the main body of the block of this utility model;

[0019] Figure 4This is a structural diagram showing the connection state of the main body of the block of this utility model;

[0020] Figure 5 This is a cross-sectional view of the wrapping layer of this utility model.

[0021] The following is a list of component names represented by the various reference numerals in the attached figures:

[0022] 1. Block body; 101. Longitudinal receiving groove; 102. Transverse receiving groove; 2. Buffer strip; 3. Handling groove; 4. Fixing notch; 5. Insertion interface; 6. Core; 7. Metal mesh; 8. Reinforcing bar; 9. Wrapping layer; 901. Pigment layer; 902. Outer protective layer; 10. Moisture-proof board. Detailed Implementation

[0023] The preferred embodiments of this utility model are described in detail below, and a clear and complete explanation is given in conjunction with the accompanying drawings.

[0024] Please see Figures 1-5 This utility model provides a crack-resistant aerated concrete block, including a block body 1. The top and bottom of the block body 1 are provided with longitudinal receiving grooves 101, and the sides of the block body 1 are provided with transverse receiving grooves 102. The depth of the longitudinal receiving grooves 101 and the transverse receiving grooves 102 is about 1 cm. The edge of the longitudinal receiving groove 101 is about 2 cm away from the edge of its end face. The top of the transverse receiving groove 102 is provided with a fixing notch 4, which extends to the upper end face of the block body 1. When carrying, the palm can be placed at the fixing notch 4 to fix the palm and prevent slippage. The inner wall of the transverse receiving groove 102 is provided with a carrying groove 3, and the fingers can be inserted into the carrying groove 3. When carrying, the hands are placed on both sides of the block body 1, and the fingers are bent and inserted into the carrying groove 3, which facilitates the application of force and makes it convenient to carry the concrete block.

[0025] When using aerated concrete blocks to build walls, the blocks are stacked from bottom to top. Before placing the upper block on top of the lower block, a layer of cement mortar is first laid on top of the lower block, with the cement mortar inside the longitudinal receiving groove 101, and the thickness is greater than 2cm. At the same time, a layer of cement mortar is applied to both ends of the block to be built, with a thickness greater than 2cm. Then, the block is placed on top of the lower block. As the bottom of the upper block contacts the top of the lower block, the longitudinal receiving groove 101 at the bottom of the upper block 1 aligns with the longitudinal receiving groove at the top of the lower block. The grooves 101 are fastened together, and the two longitudinal receiving grooves 101 form a cavity with relatively closed sides. The cavity is filled with pre-laid cement mortar. The cement mortar laid on the top of the lower block body 1 plays an adhesive role between the two. The cement mortar at both ends of the block body 1 fills the space between the block body 1 and the block bodies 1 on both sides, playing a lateral connection role. The two ends of the block body 1 are in contact with the block bodies 1 on both ends respectively. Similarly, the lateral receiving groove 102 on the side of the block body 1 is also fastened with the lateral receiving groove 102 on the side of the block body 1 to form a cavity. This cavity is also filled with cement mortar, so that the block bodies 1 are laterally connected and fixed.

[0026] In this way, the cement mortar used for longitudinal and transverse connection of the block body 1 is filled into the longitudinal receiving groove 101 and the transverse receiving groove 102. The joints after the cement mortar has solidified will not be exposed on the wall surface, so it will be less affected by the external environment, thereby slowing down the aging speed of the cement mortar after solidification, avoiding cracking of the wall built by the block body 1 at the joints, and improving the strength of the wall.

[0027] During the process of building a wall using these aerated concrete blocks, it is necessary to tap the block body 1 to ensure that the mortar makes close contact with the block body 1, such as... Figure 1 , Figure 3 As shown, a buffer strip 2 is provided inside the longitudinal receiving groove 101 above. The buffer strip 2 is located in the middle position inside the longitudinal receiving groove 101. The buffer strip 2 is made of cement mortar, but compared with ordinary cement mortar, the sand content in the cement mortar of the buffer strip 2 is greatly increased.

[0028] During the process of placing the block body 1 on top of the lower block body 1, in order to ensure that the pre-laid cement mortar is in full contact with the two block bodies 1, the construction workers in the prior art often use tools to knock the placed block body 1. In this case, the construction workers can knock the buffer strip 2, which will cause the block body 1 to vibrate and press down, making the mortar more compact and in full contact with the block body 1. However, the raw material of the buffer strip 2 has a large sand content, so the strength of the buffer strip 2 is low, and the texture is brittle and loose. Knocking will cause the buffer strip 2 to break and separate from the block body 1. In this way, the buffer strip 2 is used to buffer the force of the knocking, which can ensure that the knocking is sufficient and that the mortar is in full contact with the block body 1, while avoiding damage to the block body 1 due to the knocking. After the buffer strip 2 is fully broken, the fragments and residues are completely cleaned out from the longitudinal receiving groove 101 where it is located.

[0029] To improve the overall strength of the main block 1, such as Figure 3 , Figure 4 As shown, the main body 1 of the block includes a core 6. The raw materials of the core 6 contain cement, sand, quicklime, etc. The composition and content are existing technologies and will not be described in detail here. The core 6 is equipped with a moisture-proof board 10 and two metal meshes 7 distributed vertically. The moisture-proof board 10 is a thin sheet made of metal and faces the outside of the wall. It can block moisture and dampness to a certain extent and reduce the adverse effects of moisture and dampness on the main body 1 of the block. The moisture-proof board 10 is located on the front side of the metal meshes 7. Erasable markings are made on the front side of the main body 1 to distinguish the direction of the moisture-proof board 10.

[0030] The core 6 has two rows of steel bars 8 inside, and the bottom ends of the steel bars 8 extend to the bottom of the block body 1. The length of the protruding part at the bottom end of each steel bar 8 is the same. The steel bars 8 pass through the mesh of the metal mesh 7. The steel bars 8 and the metal mesh 7 act as a skeleton inside the block body 1, which improves the overall strength of the block body 1. Two rows of insertion interfaces 5 are opened on the inner wall of the longitudinal receiving groove 101 above. The buffer strip 2 is located between the two rows of insertion interfaces 5. The insertion interfaces 5 correspond one-to-one with the steel bars 8 and are located directly above the corresponding steel bars 8.

[0031] When building the wall, as the upper and lower blocks 1 are stacked, the steel bars 8 extending from the bottom of the upper block 1 are inserted into the insertion interface 5 at the top of the lower block 1, making the connection between the upper and lower blocks 1 more secure and further improving the strength of the wall. As for the steel bars 8 at the bottom of the bottom block 1, although they cannot be inserted into the ground, they can leave a space between the ground and the bottom of the bottom block 1 to accommodate cement mortar, so that the cement mortar can firmly fix the bottom block 1 to the ground.

[0032] During storage, transportation, or construction, in order to visually reflect the wear condition of the main block 1, such as... Figure 3 , Figure 5 As shown, the outer end of the core 6 is provided with a wrapping layer 9. The wrapping layer 9 includes a pigment layer 901 fixedly disposed on the outer end of the core 6. The raw material of the pigment layer 901 is based on the raw material of the core 6 with the addition of red pigment. Red bricks can be ground into powder and used as red pigment, which is inexpensive. An outer protective layer 902 is fixedly disposed on the outer end of the pigment layer 901. The material of the outer protective layer 902 is exactly the same as that of the core 6.

[0033] By setting a pigment layer 901 with red pigment and covering the outer end of the pigment layer 901 with an outer protective layer 902 with a thickness of about 0.5cm, if the outer protective layer 902 is damaged by friction during storage, transportation or construction, the inner red pigment layer 901 will be exposed. Since the main body of the block 1 is usually grayish-white under normal circumstances, the red pigment layer 901 will be very conspicuous. This can remind relevant personnel that the main body of the block 1 has suffered serious wear and tear, and clearly identify the location of the wear. This can prevent the use of excessively worn main body blocks 1 as building materials, and can also accurately and intuitively repair the worn parts.

[0034] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this utility model. Furthermore, any non-creative modifications made to this utility model by those skilled in the art without inventive effort are still within the protection scope of this utility model.

Claims

1. A crack-resistant aerated concrete block, comprising a block body (1), characterized in that: The top and bottom of the block body (1) are provided with longitudinal receiving grooves (101), and the sides of the block body (1) are provided with transverse receiving grooves (102). The top of the transverse receiving groove (102) is provided with a fixing notch (4), and the top of the fixing notch (4) extends to the upper surface of the block body (1).

2. The crack-resistant aerated concrete block according to claim 1, characterized in that: The transverse receiving groove (102) has a transport groove (3) on its inner wall.

3. The crack-resistant aerated concrete block according to claim 1, characterized in that: The upper longitudinal receiving groove (101) is provided with a buffer strip (2), which is located in the middle position inside the longitudinal receiving groove (101).

4. The crack-resistant aerated concrete block according to claim 1, characterized in that: The block body (1) includes a core (6), inside which is provided a moisture-proof board (10) and two metal meshes (7) distributed vertically, with the moisture-proof board (10) located on the front side of the metal meshes (7).

5. The crack-resistant aerated concrete block according to claim 4, characterized in that: The core (6) has two rows of steel bars (8) inside. The bottom end of the steel bars (8) extends to the bottom of the block body (1). Two rows of insertion interfaces (5) are opened on the inner wall of the longitudinal receiving groove (101) above. The insertion interfaces (5) correspond one-to-one with the steel bars (8).

6. The crack-resistant aerated concrete block according to claim 4, characterized in that: The core (6) has a wrapping layer (9) at its outer end. The wrapping layer (9) includes a pigment layer (901) fixedly disposed at the outer end of the core (6). An outer protective layer (902) is fixedly disposed at the outer end of the pigment layer (901).

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