阅读说明：本技术 一种钢纤维格栅增强加气混凝土墙板 (Steel fiber grating reinforced aerated concrete wallboard ) 是由 李振方 胥猛 高东 王元涛 吕国庆 刘春光 刘欣 孔正 翟浩然 黄占芳 苏天 于 2021-07-21 设计创作，主要内容包括：本发明涉及装配式建筑用预制墙板,具体为一种钢纤维格栅增强加气混凝土墙板,解决了现有预制墙板由于材料特性所限存在耐久性能差、耐火性较差、抗腐性能差且自重大的问题。一种钢纤维格栅增强加气混凝土墙板,包括加气混凝土墙板,加气混凝土墙板内设置有一层钢纤维格栅。本发明结构设计合理巧妙,显著提高了钢纤维格栅增强加气混凝土墙板的抗拉强度、抗裂性、延性和耐久性能,而且降低了墙板的自身重量,降低一定的成本,同时保证了墙板足够的粘结强度。(The invention relates to a prefabricated wallboard for an assembly type building, in particular to a steel fiber grating reinforced aerated concrete wallboard, which solves the problems of poor durability, poor fire resistance, poor corrosion resistance and large self weight of the existing prefabricated wallboard due to the limitation of material characteristics. A steel fiber grating reinforced aerated concrete wallboard comprises an aerated concrete wallboard, wherein a layer of steel fiber grating is arranged in the aerated concrete wallboard. The steel fiber grating reinforced aerated concrete wallboard has reasonable and ingenious structural design, obviously improves the tensile strength, the crack resistance, the ductility and the durability of the steel fiber grating reinforced aerated concrete wallboard, reduces the self weight of the wallboard, reduces certain cost, and simultaneously ensures the sufficient bonding strength of the wallboard.)

1. The utility model provides a steel fiber grating reinforcing aerated concrete wallboard, includes aerated concrete wallboard (1), its characterized in that: a layer of steel fiber grating (2) is arranged in the aerated concrete wallboard (1).

2. A steel fibre grid reinforced aerated concrete wallboard according to claim 1 wherein: the aerated concrete in the aerated concrete wallboard (1) comprises the following raw materials in parts by weight: 55-65 parts of quartz sand, 20-30 parts of lime, 10-20 parts of cement and 2-3 parts of desulfurized gypsum; and each cubic aerated concrete contains 480 grams of aluminum powder paste 460-.

3. A steel fibre grid reinforced aerated concrete wallboard according to claim 1 or 2, wherein: the parameters of the steel fiber grating (2) are as follows: the radial breaking strength is 30-50kN/m, the transverse breaking strength is 30-50kN/m, the radial breaking elongation is less than or equal to 3 percent, and the latitudinal breaking elongation is less than or equal to 3 percent.

Technical Field

The invention relates to a prefabricated wallboard for an assembly type building, in particular to a steel fiber grating reinforced aerated concrete wallboard.

Background

How to develop the optimal design of the appearance, the hollow rate, the structure and the like of the prefabricated wall body of the fabricated building, the preparation, the performance and the application research of the self-insulation outer wall body are carried out by optimally proportioning and maintaining the cementing materials (cement, industrial waste and the like), the functional materials (sound absorption, light weight) and the modified materials (exciting agent and fiber), and the rapid development of the prefabricated wall body of the fabricated building also becomes a practical problem for developing the building industrialization.

The prefabricated wallboard made of the novel wall material takes the composite material as a main body, has more various functions and is wider in application range. The common assembly type prefabricated wall boards in China at present are mainly divided into prefabricated wall boards made of different materials such as aerated concrete wall boards, gypsum wall boards, industrial ash lightweight wall board hollow partition boards, crop straw fiber inner wall boards and the like; the glass fiber reinforced cement (GRC) plate has strong plasticity and can meet the design requirements of various special-shaped structures, but the GRC material has weak durability and is easy to crack; the plant fiber cement board (PRC) board has certain strength, can form a composite wall body together with a reinforced concrete frame, can be used as a bearing wall body of a low-rise building structure, but has poor fire resistance and limitation due to the characteristics of a base material; the autoclaved lightweight concrete has certain heat insulation performance and good fire resistance performance, but the autoclaved lightweight aerated concrete reinforced (steel bar) wallboard has the characteristics of poor inherent corrosion resistance, low durability, great self weight and the like due to the built-in steel bars.

Disclosure of Invention

The invention provides a steel fiber grating reinforced aerated concrete wallboard, aiming at solving the problems of poor durability, poor fire resistance, poor corrosion resistance and large self weight of the existing prefabricated wallboard due to the limitation of material characteristics.

The invention is realized by adopting the following technical scheme: a steel fiber grating reinforced aerated concrete wallboard comprises an aerated concrete wallboard, wherein a layer of steel fiber grating is arranged in the aerated concrete wallboard.

The wall board is characterized in that a steel fiber grating is arranged in the aerated concrete wall board, the tensile strength, the crack resistance, the ductility, the durability and other properties of the aerated concrete can be obviously improved by utilizing the characteristics of uniform distribution and random orientation of the steel fibers, and the steel fibers have the characteristics of light dead weight and economic raw materials, so that the self weight of the wall board is reduced, and certain cost is reduced; meanwhile, the wallboard is broken in a fiber breaking mode, relative slippage between the fibers and the aerated concrete does not occur, and the steel fiber grating and the aerated concrete wallboard have enough bonding strength.

The aerated concrete in the aerated concrete wallboard comprises the following raw materials in parts by weight: 55-65 parts of quartz sand, 20-30 parts of lime, 10-20 parts of cement and 2-3 parts of desulfurized gypsum; and each cubic aerated concrete contains 480 grams of aluminum powder paste 460-.

The parameters of the steel fiber grating are as follows: the radial breaking strength is 30-50kN/m, the transverse breaking strength is 30-50kN/m, the radial breaking elongation is less than or equal to 3 percent, and the latitudinal breaking elongation is less than or equal to 3 percent.

The steel fiber grating reinforced aerated concrete wallboard has reasonable and ingenious structural design, obviously improves the tensile strength, the crack resistance, the ductility and the durability of the steel fiber grating reinforced aerated concrete wallboard, reduces the self weight of the wallboard, reduces certain cost, and simultaneously ensures the sufficient bonding strength of the wallboard.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a graph showing the variation of the compressive strength of the aerated concrete test block with the content of the aluminum paste;

FIG. 3 is a graph showing the variation of the binding power of the aerated concrete with the content of the aluminum paste.

In the figure: 1-aerated concrete wallboard and 2-steel fiber grating.

Detailed Description

Example 1

A steel fiber grating reinforced aerated concrete wallboard comprises an aerated concrete wallboard 1, wherein a layer of steel fiber grating 2 is arranged in the aerated concrete wallboard 1.

The aerated concrete in the aerated concrete wallboard 1 comprises the following raw materials in parts by weight: 55 parts of quartz sand, 20 parts of lime, 10 parts of cement and 2 parts of desulfurized gypsum; and 460 g of aluminum powder paste is contained in each cubic aerated concrete.

The parameters of the steel fiber grating 2 are: the radial breaking strength is 30N/m, the transverse breaking strength is 30kN/m, the radial breaking elongation is 1 percent, and the latitudinal breaking elongation is 1 percent.

Example 2

A steel fiber grating reinforced aerated concrete wallboard comprises an aerated concrete wallboard 1, wherein a layer of steel fiber grating 2 is arranged in the aerated concrete wallboard 1.

The aerated concrete in the aerated concrete wallboard 1 comprises the following raw materials in parts by weight: 65 parts of quartz sand, 30 parts of lime, 20 parts of cement and 3 parts of desulfurized gypsum; and each cubic aerated concrete contains 480 g of aluminum powder paste.

The parameters of the steel fiber grating 2 are: the radial breaking strength is 50kN/m, the transverse breaking strength is 50kN/m, the radial breaking elongation is 3 percent, and the latitudinal breaking elongation is 3 percent.

Example 3

A steel fiber grating reinforced aerated concrete wallboard comprises an aerated concrete wallboard 1, wherein a layer of steel fiber grating 2 is arranged in the aerated concrete wallboard 1.

The aerated concrete in the aerated concrete wallboard 1 comprises the following raw materials in parts by weight: 61 parts of quartz sand, 27 parts of lime, 18 parts of cement and 3 parts of desulfurized gypsum; and each cubic aerated concrete contains 472 g of aluminum powder paste.

The parameters of the steel fiber grating 2 are: the radial breaking strength is 38kN/m, the transverse breaking strength is 42kN/m, the radial breaking elongation is 2 percent, and the weft breaking elongation is 3 percent.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.

As shown in fig. 1, according to one embodiment of the present invention, there is provided a steel fiber grating reinforced aerated concrete wallboard, comprising an aerated concrete wallboard 1, wherein a layer of steel fiber grating 2 is arranged in the aerated concrete wallboard 1.

The steel fiber grating reinforced aerated concrete wallboard provided by the invention adopts the steel fiber grating 2 to replace the traditional steel bar, when the same bearing performance is achieved, the weight of the steel fiber grating reinforced aerated concrete wallboard can be reduced by 3% -5% compared with that of the traditional steel bar, the manufacturing cost can be reduced by 2% -3%, and in addition, due to the characteristics of the steel fiber grating, the durability is better than that of the traditional steel bar.

In a tensile experiment, no relative displacement exists between the steel fiber grating 2 and the aerated concrete wallboard 1, and the bonding strength between the steel fiber grating 2 and the aerated concrete wallboard 1 is greater than the tensile strength of the steel fiber grating 2, so that the steel fiber grating 2 and the aerated concrete wallboard 1 have good bonding strength.

In the concrete implementation process, the specific surface area of the cement is 335m²Per kg, initial setting time of 130min, final setting time of 215min, compressive strength of 45.8MPa and bending strength of 7.5MPa after 28 days, and SO in cement₃The content of (A) is 2.35%, and the content of magnesium oxide is 1.67%; the desulfurized gypsum comprises the following components: CaO 40%, SO₂ 2.75%，SO₃34 percent of MgO, 0.45 percent of MgO; the lime comprises the following chemical components: CaO 76.57%, MgO 3.62%，SO₂ 5.42%，SO₃ 0.43%，Al₂O₃3.96 percent; the quartz sand adopts standard sand; the steel fiber grating is made of a product produced by Shandong Lude New Material GmbH.

As shown in fig. 2-3, a section of the steel fiber grating 2 is taken to be subjected to a bonding strength test with aerated concrete, and the width of the section of the steel fiber bar is 15mm, and the length of the section of the steel fiber bar is 250 mm; the aerated concrete comprises the following raw materials in percentage by mass: lime: cement: desulfurized gypsum = 60: 20: 15: 3; the size of the compression strength test block is 100mm multiplied by 100mm, and the size of the bonding strength test block is 150mm multiplied by 150 mm; the size of the wallboard is 2100mm multiplied by 600mm multiplied by 100 mm; the dimension of the built-in steel fiber grating 2 is 80mm x 80 mm.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.