CN103938797A - Heat-preserving recycled concrete rectangular column with dismantling-free high performance cement mortar mold plate and manufacturing method - Google Patents

Abstract

The invention relates to a heat-preserving recycled concrete rectangular column with a dismantling-free high performance cement mortar mold plate and a manufacturing method and belongs to the technical field of structural engineering. The rectangular column comprises the high performance cement mortar plate, high polymer mortar, a steel bar framework, recycled concrete, vitrified beads and angle iron connecting pieces. The rectangular column has the advantages that the heat preservation performance of the structure can be increased by 20% and the green recycling can be realized by adopting the novel heat-preserving recycled concrete; in the meantime, the high performance cement mortar plate has good durability and strength and can be free of dismantling while serving as an outer mold plate, so that the integrality and the durability of the structure are increased.

Description

High-performance cement mortar formwork heat preservation recycled concrete rectangular column without demolition and its method

technical field

The invention relates to a non-dismantling high-performance cement mortar formwork thermal insulation recycled concrete rectangular column and a method thereof, which belong to the technical field of structural engineering.

Background technique

With the rapid development of productivity, energy consumption is getting higher and higher. The energy demand in our country is increasing at a rate of 2% per year, and about 30% of this energy is consumed in buildings. According to statistics, by the end of 2000, the existing construction area of cities and towns across the country had reached 7.66 billion square meters (including 4.41 billion square meters of residential buildings), of which about 180 million square meters could meet the heating and energy-saving design standards, accounting for only 2.3% of the urban housing area. %. There are still more than 4 billion square meters of urban heating and residential areas in the country that need to be renovated. Including public buildings, industrial buildings and rural housing buildings, there are more than 27 billion square meters of existing buildings in the country that need energy-saving renovations. Especially at present, a large number of public buildings with central air-conditioning systems in my country are also large building energy consumers. This type of building has a huge energy-saving potential of about 30% to 50% in terms of enclosure structures and heating and air-conditioning systems. As a country with a large energy consumption, the importance of saving energy has been highlighted in various fields of our country. In the 21st century, with the reform of my country's building insulation materials and the implementation of related policies such as building energy conservation, the development of new insulation materials and energy-saving residential structure systems has become one of the top tasks in the engineering field.

With the rapid development of civil engineering, a large amount of construction waste will be produced in my country every year, among which waste concrete accounts for about 30% to 40% of construction waste. Such a huge amount of waste concrete, in addition to the staggering cost of disposal, also requires a large amount of open space for storage, polluting the environment and wasting cultivated land, becoming a major public hazard in the city, and the environmental problems caused by it are also very prominent. Taking my country as an example, if 10,000 tons of construction waste needs to occupy two acres of land, 1.8 to 2.4 billion tons of waste concrete will occupy 3.6 to 4.8 billion acres of land every year. This will undoubtedly make my country's original shortage of cultivated land worse. However, it is difficult to find places to bury in the suburbs of many large and medium-sized cities such as Beijing and Shanghai in my country, and this situation will become increasingly severe.

The traditional reinforced concrete column structure needs to make wooden formwork when pouring, which not only wastes resources but also increases the project cost, and it is inconvenient to construct. At the same time, the traditional reinforced concrete column has poor thermal insulation performance, and most of the internal pouring is ordinary Concrete cannot be environmentally friendly. Based on this, the present invention proposes a green energy-saving load-bearing column that is simple and environmentally friendly, easy to construct, replaces the traditional formwork with a permanent non-demolition-free high-performance cement mortar formwork, and casts in-situ thermal insulation recycled concrete. Compared with the traditional concrete load-bearing column, its The durability and bearing capacity have been improved. At the same time, the mortar formwork does not need to be disassembled, which improves the integrity and seismic performance of the structure. At the same time, the thermal insulation recycled concrete has good thermal insulation performance and can be environmentally friendly. New structural systems for multi-storey buildings.

Contents of the invention

The purpose of the present invention is to provide a high-performance cement mortar formwork thermal insulation recycled concrete rectangular column without dismantling and its method, which has the advantages of simple structure, low cost, convenient construction, green energy saving and durable integration, in order to effectively solve the problem of traditional concrete column insulation performance. Good, poor durability, unable to achieve environmental protection and other issues.

In order to achieve the above object, the technical solution adopted in the present invention is a rectangular column of heat-insulating recycled concrete with high-performance cement mortar formwork without dismantling and its method. High-performance cement mortar board, high-polymer mortar, steel skeleton, recycled concrete, vitrified microbeads, angle steel connectors.

Specifically, the high-performance mud mortar board can be processed into corresponding modulus, such as 300, 600, 900mm, and the thickness is 20-25mm. The mortar is high-performance mortar, with steel wire dense mesh inside as the steel skeleton, and a high-frequency vibrator is used for fine and compact vibration to ensure that the high-performance mortar can be effectively bonded to the steel wire dense mesh, which greatly improves the strength of the steel mesh mortar board. The density and strength can theoretically reach the concrete strength grade of C40~C50; when processing high-performance cement mortar boards, only the flat side is used as the outside of the pouring formwork, and the rough side is the inner surface of the pouring formwork, thereby effectively improving the thermal insulation regeneration of the pouring Bonding of concrete to high performance cement mortar panels.

The high-polymer mortar provides reliable bonding for the steel mesh mortar board, and at the same time, it can be quickly bonded and hardened, thus overcoming the problem of erecting the steel mesh mortar formwork. The thickness of the mortar application should not exceed 5-8mm.

The longitudinal steel bars in the steel bar skeleton are HRB335 or HRB400 steel bars with a diameter of 12 mm to 14 mm; the stirrups are HPB300 steel bars with a diameter of 8 mm to 10 mm and a stirrup spacing of 150 mm.

Recycled concrete is concrete prepared according to the replacement of different coarse and fine aggregates. It is made by crushing, cleaning, sieving and grading waste concrete and mixing them in a certain proportion. It is divided into coarse aggregate instead of recycled concrete and fine aggregate. Instead of concrete, the replacement rate is mainly coarse aggregate, the replacement rate is 30% to 50%, and the replacement rate of fine aggregate is not more than 10%.

Vitrified microbeads are irregular spherical particles with a continuous vitrified closed surface and a complete porous hollow structure inside. It has the characteristics of light weight, heat preservation and aging resistance. The selected vitrified microspheres have a diameter of 1.5-2.0 mm. The combination of vitrified microbeads and recycled concrete forms a new thermal insulation recycled concrete.

The angle steel connectors are small equilateral angle steel with a size of ∠30×30×3 (30mm side width and 3mm side thickness), which are used to strengthen the connection of the steel mesh mortar board at the bend, and the horizontal layout spacing is 250-300mm , the vertical spacing is 300-400mm.

Compared with the prior art, the present invention has the following beneficial effects.

The non-removable high-performance cement mortar formwork insulation recycled concrete rectangular column of the present invention is suitable for low and multi-storey new building systems. The new type of thermal insulation recycled concrete not only improves the thermal insulation performance of the structure, but also can achieve green regeneration. The thermal insulation performance can be increased by 20%. At the same time, the high-tech cement mortar board has good durability and strength. Improved structural integrity and durability.

Description of drawings

Figure 1 is a cross-sectional view of a rectangular column of heat-insulating recycled concrete with high-performance cement mortar formwork without dismantling.

Figure 2 is a schematic view of angle steel connectors.

Fig. 3 The elevation view of the recycled concrete rectangular column with high-performance cement mortar formwork insulation without dismantling.

In the figure: 1. High-performance cement mortar board, 2. High-polymer mortar, 3. Steel skeleton, 4. Recycled concrete, 5. Vitrified microbeads, 6. Angle steel connectors.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments.

As shown in Figure 1-3, a kind of non-dismantling high-performance cement mortar formwork heat preservation recycled concrete rectangular column and its method, the free high-performance cement mortar formwork heat preservation recycled concrete rectangular column of the present invention, the rectangular column includes high-performance cement mortar Board 1, high-polymer mortar 2, steel skeleton 3, recycled concrete 4, vitrified beads 5, angle steel connector 6.

The high-performance cement mortar board 1 is used as an external non-demolition formwork to provide reliable flexible bonding and rigid connection through high-polymer mortar 2 and angle steel connectors 6. At the same time, there is a steel skeleton 3 inside, which greatly improves the overall performance of the structure. The last time Properly pouring recycled concrete 4 and vitrified microbeads 5 with a reasonable ratio of recycled thermal insulation concrete, forming a high-performance cement mortar formwork thermal insulation recycled concrete rectangular column without dismantling.

Specifically, the high-performance mud mortar board 1 can be processed into a corresponding modulus, such as 300, 600, 900mm, and a thickness of 20-25mm. The mortar is high-performance mortar, with steel wire dense mesh inside as the steel skeleton, and a high-frequency vibrator is used for fine and compact vibration to ensure that the high-performance mortar can be effectively bonded to the steel wire dense mesh, which greatly improves the strength of the steel mesh mortar board. The density and strength can theoretically reach the concrete strength grade of C40~C50; when processing high-performance cement mortar boards, only the flat side is used as the outside of the pouring formwork, and the rough side is the inner surface of the pouring formwork, thereby effectively improving the thermal insulation regeneration of the pouring Bonding of concrete to high performance cement mortar panels.

High-polymer mortar 2 provides reliable bonding for the steel mesh mortar board, and at the same time can quickly bond and harden, thereby overcoming the problem of erecting the steel mesh mortar formwork. The thickness of the mortar application should not exceed 5-8mm.

The longitudinal steel bars in the steel bar skeleton 3 are HRB335 or HRB400 steel bars with a diameter of 12 mm to 14 mm; the stirrups are HPB300 steel bars with a diameter of 8 mm to 10 mm and a stirrup spacing of 150 mm.

Recycled concrete 4 is concrete prepared according to the replacement of different coarse and fine aggregates. It is made by crushing, cleaning, sieving and grading waste concrete and mixing them in a certain proportion. It is divided into coarse aggregate replacing recycled concrete and fine bone concrete. Concrete is replaced by coarse aggregate, the replacement rate is 30% to 50%, and the replacement rate of fine aggregate is not more than 10%.

The vitrified microbead 5 is an irregular spherical particle with a continuous vitrified closed surface and a complete porous hollow structure inside, which has the characteristics of light weight, heat preservation and aging resistance. The selected vitrified microspheres have a diameter of 1.5-2.0 mm. The combination of the vitrified microbeads 5 and the recycled concrete 4 forms a new thermal insulation recycled concrete.

The angle steel connector 6 is made of small equilateral angle steel with a size of ∠30×30×3 (side width 30mm and side thickness 3mm), which is used to strengthen the connection of the steel mesh mortar board at the bend, and the horizontal layout distance is 250～ 300mm, the vertical spacing is 300~400mm.

The non-dismantling high-performance cement mortar formwork insulation recycled concrete rectangular column has the following manufacturing method.

In S1, insert the steel skeleton of the recycled concrete rectangular column without demolition-free high-performance cement mortar formwork into the foundation beam according to the size, and pour the reinforced concrete of the foundation beam.

S2 The upper surface of the foundation beam is measured and laid out according to the plane size of the house, the upper surface of the foundation beam is leveled, and the double solid line is popped up according to the thickness of the high-performance cement mortar formwork.

In S3, the high-performance cement mortar formwork is lapped and built, and the cement mortar board is bonded with high-polymer mortar, and an angle steel connection 6 is added at the same time.

S4 Pouring thermal insulation recycled concrete in the rectangular frame surrounded by high-performance cement mortar boards 1 to form a rectangular column of thermal insulation recycled concrete with high-performance cement mortar formwork.

Claims (2)

1. exempt to tear open a high-performance cement mortar template insulation regeneration concrete rectangular column, it is characterized in that: this rectangular column comprises high-performance cement Mortar Plates (1), high Polymer Mortar (2), cage of reinforcement (3), regeneration concrete (4), vitrifying microballon (5), angle iron connecting piece (6);

High-performance cement Mortar Plates (1) is provided reliable flexible adhesion and is rigidly connected by high Polymer Mortar (2) and angle iron connecting piece (6) as outside non-dismantling formwork, simultaneously, inside is provided with cage of reinforcement (3), greatly improve the overall performance of structure, last property is built the regeneration thermal insulation concrete by regeneration concrete (4) and vitrifying microballon (5) rational proportion, has just formed and has exempted to tear open high-performance cement mortar template insulation regeneration concrete rectangular column;

Particularly, high-performance silt particle pulpboard (1) can be processed into corresponding modulus, and as 300,600,900mm, thickness is 20～25mm; What mortar adopted is High Performance Mortar, inside has steel wire to gather net as cage of reinforcement, adopting dither to carry out fine and closely woven reality vibrates, net is effective to bond to ensure to gather High Performance Mortar with steel wire, greatly improved compactness and the intensity of wire mesh mortar plate, theory can reach C40～C50 strength grade of concrete; In the time of processing high-performance cement Mortar Plates, the outside of one side as formwork for placing put down in a throwing, the inner face that coarse one side is formwork for placing, thereby the insulation regeneration concrete that effectively raising is built and the bonding of high-performance cement Mortar Plates;

High Polymer Mortar (2) provides reliable bonding for wire mesh mortar plate, adhesive-hardening fast simultaneously, thus overcoming the problem of setting up of wire mesh mortar template, mortar smearing thickness should not exceed 5～8mm;

Longitudinal reinforcement in described cage of reinforcement (3) adopts HRB335 level or HRB400 grade reinforcing steel, and diameter is 12mm～14mm; Stirrup adopts HPB300 grade reinforcing steel, and stirrup diameter is 8mm～10mm, stirrup spacing 150mm;

The concrete of regeneration concrete (4) for preparing according to the replacement situation of different thicknesses aggregate, by discarded concrete disintegrating, cleaning and sieve classification and by a certain percentage mutually proportioning form, be divided into coarse aggregate and replace regeneration concrete and fines replacement concrete, replace with coarse aggregate, replacement rate is 30%～50%, and fines replacement rate is no more than 10%;

Vitrifying microballon (5) is a kind of continuous vitrifying confining surface, the irregular orbicule particle of inner complete porous hollow structure simultaneously, and it has light weight, insulation, ageing-resistant feature.The diameter of the vitrifying microballon of selecting is 1.5～2.0mm; Vitrifying microballon (5) and regeneration concrete (4) combination have just formed novel heat insulation regeneration concrete;

Angle iron connecting piece (6) is selected small-sized equal leg angle, is of a size of ∠ 30 × 30 × 3, the connection for stiffened wire lath Mortar Plates in bending place, and horizontal arrangement spacing is 250～300mm, vertical spacing is 300～400mm.

2. exempt to tear open high-performance cement mortar template insulation regeneration concrete rectangular column according to one claimed in claim 1, its practice is, it is characterized in that: exempt to tear open high-performance cement mortar template insulation regeneration concrete rectangular column, its preparation method is as follows,

S1 inserts in the cage of reinforcement of exempting to tear open high-performance cement mortar template insulation regeneration concrete rectangular column in grade beam by size, builds grade beam steel concrete;

S2 copies measuring line by grade beam upper surface by house planar dimension, and levelling grade beam upper surface ejects double solid line by the thickness of high-performance cement mortar template;

High-performance cement mortar template is overlapped brick work by S3, and reinforced cement-mortar board adopts high Polymer Mortar to bond, and adds angle steel simultaneously and connect (6);

In the rectangle frame that S4 surrounds at high-performance cement Mortar Plates (1), build the formation of insulation regeneration concrete and exempt to tear open high-performance cement mortar template insulation regeneration concrete rectangular column.