阅读说明：本技术 一种轻钢龙骨改性石膏基轻质隔墙及其施工方法 (Light steel keel modified gypsum-based light partition wall and construction method thereof ) 是由 全思臣 赵志曼 吴磊 李丹 刘卓 王存 张芷绮 成俊臣 廖仕雄 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种轻钢龙骨改性石膏基轻质隔墙及其施工方法,旨在提供一种轻质高强、施工快速的轻钢龙骨改性石膏基轻质隔墙及其施工方法。其中轻钢龙骨改性石膏基轻质隔墙包括以下结构：改性石膏面板；轻钢龙骨；改性石膏基轻质填充料；轻质填充块；螺栓。其中施工方法主要包括以下步骤1、龙骨搭设；2、背面板搭设；3、轻质填充料浇筑；4、前面板搭设；5、轻质填块安置。本发明可循环拆解使用,具有强度高、质量轻、可钉挂、施工简单快捷、施工成本低廉的优势；同时,具有良好的防火保温性能,另外还可以不用施做系梁等维持墙体稳定的结构。(The invention discloses a light steel keel modified gypsum-based light partition wall and a construction method thereof, and aims to provide a light steel keel modified gypsum-based light partition wall which is light, high in strength and rapid in construction and a construction method thereof. Wherein light gauge steel fossil fragments modified gypsum base light partition wall includes following structure: a modified gypsum panel; a light steel keel; modified gypsum-based lightweight filler; a lightweight filling block; and (4) bolts. The construction method mainly comprises the following steps of 1, building a keel; 2. erecting a back panel; 3. pouring a light filler; 4. erecting a front panel; 5. and (5) arranging light filling blocks. The invention can be recycled and disassembled for use, and has the advantages of high strength, light weight, nail hanging, simple and rapid construction and low construction cost; meanwhile, the fireproof heat-insulating wall has good fireproof heat-insulating performance, and in addition, a structure for maintaining the stability of the wall body such as a tie beam and the like can be omitted.)

1. The light steel keel modified gypsum-based light partition wall is characterized by comprising the following structures: fasteners such as light steel keels, modified gypsum panels, modified gypsum-based light fillers, light filling blocks, bolts and the like; the modified gypsum panel is a calcium sulfate hemihydrate product formed by dehydrating phosphogypsum after innocent treatment; the light steel keel is a novel building material which is pre-perforated according to requirements and accords with the national standard GB/T11981-2008 light steel keel for building.

2. The light steel keel modified gypsum-based light partition wall as claimed in claim 1, which is characterized by comprising the following structures and parts:

(1) preparing a modified gypsum panel:

A. modifying phosphogypsum to prepare a hemihydrate gypsum powdery material with hydration and gelatinization capacity;

B. preparing panel main materials according to the following proportions:

75-90% of modified semi-hydrated gypsum, 2-5% of polypropylene fiber (length is 20-25mm), 2-8% of heavy calcium powder, 0.2-0.5% of silica fume, 5-10% of natural gypsum and 0.8-1.5% of calcium oxide;

C. preparing panel additives from the following materials in proportion of the panel main materials:

0.5-1% of naphthalene water reducing agent, 0.3-0.7% of mineral oil defoaming agent and 0.3-0.7% of thickening agent;

D. stretching the full-length fiber or fiber mesh cloth:

stretching long fibers or fiber mesh cloth along the length direction of the panel mould;

E. molding in a mold: adding a certain amount of water into the mixture, and stirring at a high speed until the material forms a sticky material body, and then sending the sticky material body into a static pressure machine for compression molding, wherein the water-cement ratio is 0.2-0.3;

F. cutting: cutting two blocks of the formed modified gypsum boards according to the size of the wall; one of the back plates is used as a back plate and is reserved for standby; the other piece is cut at a position of about 100mm along the height direction to form two plates; wherein the small part is called the infill panel and the larger part is called the front panel;

(2) the preparation of the modified gypsum-based light filling material comprises the following steps:

A. preparing the main materials of the filling material according to the following proportion:

55-65% of modified semi-hydrated gypsum, 4-15% of natural gypsum, 1-5% of silica fume, 20-40% of large-particle-size light filler and 5-20% of small-particle-size light filler;

B. preparing the additive of the filling material according to the following proportion:

1-3% of naphthalene water reducing agent, 0.3-0.7% of tartaric acid, 0.5-1% of redispersible latex powder and 0.2-0.7% of triethanolamine;

C. and (3) mixing of fillers: adding the raw materials prepared in proportion into a stirrer, mixing the raw materials with water according to the water-material ratio of 1:3-1:4 to obtain a slurry mixture, and uniformly stirring the slurry mixture for 5-10min to form a filler slurry for later use;

(3) preparing a light filling block:

filling the filler slurry prepared in the step (2) into a mold, and then tightly bonding the filler slurry with the filling plate in the step (1) to form a firm whole, namely a light filling block;

(4) bolts are conventionally used mechanical fasteners, cylindrical threaded fasteners with nuts.

3. A light steel keel modified gypsum-based light partition construction method is characterized by comprising the following construction steps:

(1) keel erection:

A. keel treatment: the top keel, the ground keel and the main keel are subjected to hole opening and nut welding in a factory according to design requirements, and are subjected to a pre-erection experiment after being transported to a site;

B. fixing the top keel at the bottom of the upper floor slab or the bottom of the beam along the designed length direction of the partition wall; if the building form is that the steel structure can be welded, if the building form is a concrete structure, the building is fixed by adopting self-tapping screws and other forms;

C. the ground keels and the top keels are in one-to-one correspondence and are arranged on the ground of the floor, so that the vertical projections of the ground keels and the top keels are superposed;

D. connecting and fixing the main keel, the top keel and the earthworm keel, wherein holes on the keels correspond to each other, and then anchoring by adopting bolts;

(2) setting up a panel:

A. panel treatment: uniformly perforating the panel in a factory;

B. vertically approaching the back panel and the front panel to the keels, adjusting the positions of the panels to enable the upper holes of the panels to be superposed with the positions of the upper holes of the top keel, the ground keel and the main keel, then anchoring by bolts and fixing the panels;

(3) pouring the modified gypsum-based light filling material:

and pouring the modified gypsum-based light filler at the gap between the front panel and the top beam or the top plate. The casting requires continuous layered casting.

(4) And (3) arranging a light filling block:

A. coating adhesive plaster with the thickness of 2-3mm on the contact surface of the light filling block to be filled and the back panel;

B. and (4) facing the side coated with the bonding gypsum to the back panel, extruding tightly, and confirming that the mounting position is accurate.

4. The method for constructing a light gauge steel modified gypsum-based light partition wall according to claim 3, wherein the materials in the molding process are sent into a static pressure machine after forming sticky materials, and the pressure is not less than 15MPa in the compression molding process.

5. The construction method of a light gauge steel modified gypsum-based light partition wall according to claim 1, wherein the grade of the bolt used is not less than 3.3.

6. The method for constructing a light gauge steel modified gypsum-based light partition wall according to claim 3, wherein the number of the openings on the main keel, the ground keel and the top keel is not less than 1 per 2m, and not more than 4 per 5 m.

7. The method as claimed in claim 3, wherein the plaster is applied to the surface of the light steel keel in an area of at least 60% of the contact area between the light filling blocks and the surface plate.

Technical Field

The invention relates to the technical field of building engineering and materials, in particular to a light steel keel modified gypsum-based light partition wall and a construction method thereof.

Background

The cast-in-situ modified gypsum-based light partition wall is prepared by treating the byproduct phosphogypsum of a phosphate fertilizer plant, adding a certain amount of additive and external additive to prepare a gypsum-based cementing material, and filling the gypsum-based cementing material with light filler. Is a substitute product for composite wall panels, GRC composite wall panels, gypsum boards and the like developed in recent years. It is especially suitable for large-space and large-span buildings.

The cast-in-place modified gypsum-based light partition wall is a novel, environment-friendly, convenient and low-cost construction method of a non-load-bearing wall body, and when the cast-in-place modified gypsum-based light partition wall is used for pouring the non-load-bearing wall body, the dead weight of the wall body can be effectively reduced, the stability and the rigidity of the wall body are improved, and the cast-in-place modified gypsum-based light partition wall. The method has the advantages of reasonable technology, material saving, green and environment-friendly material, convenience in construction, energy conservation and consumption reduction. The product can be widely applied to building systems such as public buildings, shopping malls, schools, high-rise buildings, large-span buildings and the like. The partition wall constructed by the cast-in-place modified gypsum-based light partition wall keeps the characteristics of light weight, high strength and multiple functions of gypsum. The building material has the advantages of heat preservation, sound insulation, fire prevention, humidity adjustment and the like, is a green building material which is accepted at home and abroad, and is a novel building material which is mainly popularized in building energy conservation and building technical innovation in China.

However, most of the existing lightweight wall panels are not suitable for building with a light steel keel structure. At present, in the market, the cost is high because the alpha-type high-strength gypsum is used for preparing gypsum boards, or cement is used as a base material for preparing GRC composite boards and foam composite wallboards. And because the light steel has low structural rigidity and is greatly influenced by temperature difference, the light steel is easy to generate cracks and other quality problems when used with building materials such as cement base and the like.

In addition, in the engineering construction, because various plates have fixed specifications, waste is easy to generate in additional processing, and cast-in-place large-volume gypsum slurry and cement slurry have extremely low drying speed and are extremely difficult to dry in short time to generate strength, so that the construction difficulty is increased, and the turnover cost of the template is increased. The phosphogypsum has great regionality, and the applicable formula of each place is different, so that the problem to be solved by the technical personnel in the field is how to provide the light steel keel modified gypsum-based light partition wall and the construction method thereof.

Disclosure of Invention

The invention aims to provide a light steel keel modified gypsum-based light partition wall and a construction method thereof, and the light steel keel modified gypsum-based light partition wall has the characteristics of light weight, high drying speed and high strength.

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

the light steel keel modified gypsum-based light partition wall is characterized by comprising the following structures: fasteners such as light steel keels, modified gypsum panels, modified gypsum-based light fillers, light filling blocks, bolts and the like; the modified gypsum panel is a calcium sulfate hemihydrate product formed by dehydrating phosphogypsum after innocent treatment; the light steel keel is a novel building material which is pre-perforated according to requirements and accords with the national standard GB/T11981-2008 light steel keel for building.

Preferably, the method comprises the following steps of:

(1) preparing a modified gypsum panel:

A. modifying phosphogypsum to prepare a hemihydrate gypsum powdery material with hydration and gelatinization capacity; B. preparing panel main materials according to the following proportions:

75-90% of modified semi-hydrated gypsum, 2-5% of polypropylene fiber (length is 20-25mm), 2-8% of heavy calcium powder, 0.2-0.5% of silica fume, 5-10% of natural gypsum and 0.8-1.5% of calcium oxide;

C. preparing panel additives from the following materials in proportion of the panel main materials:

0.5-1% of naphthalene water reducing agent, 0.3-0.7% of mineral oil defoaming agent and 0.3-0.7% of thickening agent;

D. stretching the full-length fiber or fiber mesh cloth:

stretching long fibers or fiber mesh cloth along the length direction of the panel mould;

E. molding in a mold: adding a certain amount of water into the mixture, and stirring at a high speed until the material forms a sticky material body, and then sending the sticky material body into a static pressure machine for compression molding, wherein the water-cement ratio is 0.2-0.3;

F. cutting: cutting two blocks of the formed modified gypsum boards according to the size of the wall; one of the back plates is used as a back plate and is reserved for standby; the other piece is cut at a position of about 100mm along the height direction to form two plates; wherein the small part is called the infill panel and the larger part is called the front panel;

(2) the preparation of the modified gypsum-based light filling material comprises the following steps:

A. preparing the main materials of the filling material according to the following proportion:

55-65% of modified semi-hydrated gypsum, 4-15% of natural gypsum, 1-5% of silica fume, 20-40% of large-particle-size light filler and 5-20% of small-particle-size light filler;

B. preparing the additive of the filling material according to the following proportion:

1-3% of naphthalene water reducing agent, 0.3-0.7% of tartaric acid, 0.5-1% of redispersible latex powder and 0.2-0.7% of triethanolamine;

C. and (3) mixing of fillers: adding the raw materials prepared in proportion into a stirrer, mixing the raw materials with water according to the water-material ratio of 1:3-1:4 to obtain a slurry mixture, and uniformly stirring the slurry mixture for 5-10min to form a filler slurry for later use;

(3) preparing a light filling block:

filling the filler slurry prepared in the step (2) into a mold, and then tightly bonding the filler slurry with the filling plate in the step (1) to form a firm whole, namely a light filling block;

(4) bolts are conventionally used mechanical fasteners, cylindrical threaded fasteners with nuts.

4. Preferably, the method comprises the following construction steps:

(1) keel erection:

A. keel treatment: the top keel, the ground keel and the main keel are subjected to hole opening and nut welding in a factory according to design requirements, and are subjected to a pre-erection experiment after being transported to a site;

B. fixing the top keel at the bottom of the upper floor slab or the bottom of the beam along the designed length direction of the partition wall; if the building form is that the steel structure can be welded, if the building form is a concrete structure, the building is fixed by adopting self-tapping screws and other forms;

C. the ground keels and the top keels are in one-to-one correspondence and are arranged on the ground of the floor, so that the vertical projections of the ground keels and the top keels are superposed;

D. connecting and fixing the main keel, the top keel and the earthworm keel, wherein holes on the keels correspond to each other, and then anchoring by adopting bolts;

(2) setting up a panel:

A. panel treatment: uniformly perforating the panel in a factory;

B. vertically approaching the back panel and the front panel to the keels, adjusting the positions of the panels to enable the upper holes of the panels to be superposed with the positions of the upper holes of the top keel, the ground keel and the main keel, then anchoring by bolts and fixing the panels;

(3) pouring the modified gypsum-based light filling material:

and pouring the modified gypsum-based light filler at the gap between the front panel and the top beam or the top plate. The casting requires continuous layered casting.

(4) And (3) arranging a light filling block:

A. coating adhesive plaster with the thickness of 2-3mm on the contact surface of the light filling block to be filled and the back panel;

B. and (4) facing the side coated with the bonding gypsum to the back panel, extruding tightly, and confirming that the mounting position is accurate.

Preferably, the material in the die-casting molding is fed into a static pressure machine after forming a sticky material body, and the pressure intensity is not less than 15MPa during the compression molding.

Preferably, the bolt grade used is not less than 3.3.

Preferably, the number of the holes on the main keel, the ground keel and the top keel is not less than 1 per 2m, and not more than 4 per 5 m.

Preferably, the brushing area of the brushing bonding gypsum is at least 60% of the contact area of the lightweight filling block and the panel.

According to the technical scheme, compared with the prior art, the invention has the following advantages:

(1) the method of the invention is environment-friendly and simple, has low cost, does not need additional supporting templates, is used for tying beams and other functional structures for maintaining the stability of the wall body, improves the compressive strength and the softening coefficient of the composite wall body, greatly reduces the apparent density of the cast-in-place gypsum wallboard, and simultaneously shortens the setting and hardening time of the large-volume cast-in-place gypsum wall body. The method improves the tightness of the combination of the cast-in-place lightweight wall and the light steel keel, and has reliable stability and rigidity. The prepared cast-in-place light wall body is a novel building material with certain shock resistance, low cost, environmental protection, low carbon and convenient construction, is high in drying and forming speed and light in weight, and all indexes of the cast-in-place light wall body accord with the requirements of GB/T23451-2009 light partition wall batten for buildings.

(2) The invention can greatly shorten the final setting time of the cast-in-place wall body, thereby greatly accelerating the construction speed of the non-bearing wall body, simultaneously reducing the formwork support and disassembly and turnover of the cast-in-place wall body, directly or indirectly shortening the construction cost, and in addition, the invention can not be used for constructing a structure for maintaining the stability of the wall body, such as a tie beam and the like.

(3) The light steel keel is used as a backbone, so that gypsum is attached to the backbone, and a firm and stable whole can be formed by pouring, so that the whole cast-in-place light plate has higher shock load resistance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a light steel keel modified gypsum-based light partition wall.

Fig. 2 is a drawing showing the erection of the light steel keel and the installation of the back panel.

Figure 3 is a front panel mounting of the present invention.

FIG. 4 is a drawing showing the pouring of the light filling material and the installation of the light filling blocks.

Fig. 5 is a schematic view of the overall structure of the light steel keel modified gypsum-based light partition wall.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the structure includes the following: fasteners such as a light steel keel 1, a modified gypsum panel 2, a modified gypsum-based light filling material 3, a light filling block 4, a bolt 5 and the like; the modified gypsum panel is a calcium sulfate hemihydrate product formed by dehydrating phosphogypsum after innocent treatment; the light steel keel is a novel building material which is pre-perforated according to requirements and accords with the national standard GB/T11981-2008 light steel keel for building.