A new type of self-heating insulation curing film material for cement concrete structure

Abstract

The application discloses a new self-heating heat-preservation curing film material for cement concrete structure, which is sequentially laid with a water absorbing layer, a self-heating layer and a PVC film layer from bottom to top, and is provided with non-woven fabric between the layers, characterized in that the water absorbing layer is made of high molecular water absorbing material, and the self-heating layer is mainly prepared from quicklime. The new self-heating heat-preservation curing film material for cement concrete structure can be heated by virtue of the self-heating characteristic, has good heat-preservation and moisture-retention functions, is suitable for concrete curing in severe cold regions such as the three northern regions of China and the Qinghai-Tibet Plateau and regions with large daily temperature difference, and can meet the curing water content by once watering, so that the curing construction steps are simplified, manpower is saved, and high economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road engineering, and is a new self-heating heat preservation curing film material for cement concrete structure. BACKGROUND

[0002] Highway is an important part of China's transportation system, and is also the focus of China's basic transportation construction project. With the rapid growth of China's economy and the continuous improvement of people's living standards, the amount of various types of vehicles is increasing, which increases the pressure on highway use and requires highway construction to improve the quality of pavement engineering construction as the ultimate goal. In highway engineering, cement concrete pavement gradually becomes the mainstream in China's highway construction and is widely used in highway engineering construction due to its low material cost, easy operation and wide application range.

[0003] Cement concrete pavement is composed of reinforced concrete, concrete material and concrete paving block panel layer, mainly including plain concrete, reinforced concrete, continuously reinforced concrete and prestressed concrete. Cement-based concrete has strong bearing capacity, good durability and abundant material sources. With the development of concrete technology, researchers are increasingly inclined to high-performance and high-durability concrete. However, due to the low water-cement ratio, concrete tends to dry out, leading to early shrinkage deformation and easy cracking. Therefore, early concrete curing is of great significance.

[0004] Common concrete curing methods are divided into three types: standard curing, natural curing and rapid curing with heating, and the most commonly used method in engineering is natural curing. At present, the natural curing methods for cement concrete pavement mainly include the following: water spraying curing, covering curing (covering wet burlap, grass screen, film, etc.), spraying curing agent, etc.

[0005] Ordinary curing methods can basically meet the early curing conditions of concrete pavement in ordinary plain areas, but ordinary curing methods such as water spraying cannot meet the development of early strength of concrete pavement in the northwest region of China. In the three north regions and the Qinghai-Tibet Plateau region of China, due to low daily temperature difference and more low-temperature weather, concrete structures using ordinary curing measures are prone to temperature cracks and shrinkage cracks, which ultimately leads to uneven development of early strength of concrete and causes various cracking problems, affecting the stability and durability of the structure.

[0006] Therefore, based on the current status of the curing method and the climate and geological conditions of the northwest region, the present application proposes a new self-heating heat preservation curing film structure for cement concrete structure. The film structure itself has good heat preservation and moisture retention performance, and to some extent, it saves manpower and material resources, providing a new method for the initial curing of concrete pavement in the northwest region. SUMMARY

[0007] (1) Technical problems

[0008] The application aims to provide a new self-heating curing film material for cement concrete structure, which has good heat preservation and moisture retention and can effectively solve the problem of poor natural curing effect.

[0009] (2) Technical solutions

[0010] To achieve the above-mentioned purpose, the application provides a new self-heating curing film material for cement concrete structure.

[0011] The self-heating curing film material for cement concrete structure comprises, from top to bottom, a PVC film layer, a self-heating layer and a water absorption layer.

[0012] The self-heating curing film material for cement concrete structure is characterized in that the self-heating layer is mainly composed of quicklime, iron powder, activated carbon and salt.

[0013] The self-heating curing film material for cement concrete structure is characterized in that the water absorption layer is composed of high-molecular water-absorbing resin sodium polyacrylate, and the particle size is 100-120 mesh.

[0014] The self-heating curing film material for cement concrete structure is characterized in that the self-heating reaction time of the self-heating layer is controlled to be 5-10 hours.

[0015] The self-heating curing film material for cement concrete structure is characterized in that the water absorption layer and the self-heating layer are both packaged with non-woven fabric.

[0016] The self-heating curing film material for cement concrete structure is characterized in that the thickness of the whole film material is 4-6 mm.

[0017] Advantages

[0018] Compared with the prior art, the application has the following advantages:

[0019] 1. This invention uses super absorbent resin as the absorbent layer material. Each gram of super absorbent resin can absorb hundreds of grams of deionized water within 30 seconds. It is non-toxic and pollution-free. It has an extremely strong water absorption capacity and an extremely high water retention capacity. The absorbed water cannot be squeezed out by simple physical methods. It can repeatedly release and absorb water. Therefore, a single watering can meet the water requirements of the entire maintenance process, greatly simplifying the construction process, making quality easy to control, saving manpower and material resources, reducing construction costs, and generating certain economic benefits.

[0020] 2. The self-heating layer of the present invention generates heat through the hydration reaction of quicklime, while iron powder reacts with a small amount of air to generate heat for heating and insulation. It is suitable for concrete pavement maintenance in frigid regions such as the Three-North Region, the Qinghai-Tibet Plateau, and environments with large daily temperature differences. Attached image description:

[0021] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0022] Figure 1 This is an overall schematic diagram of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the thin film material structure layer according to an embodiment of the present invention. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the following specific embodiments.

[0025] like Figure 1 , Figure 2 As shown, the present invention proposes a novel self-heating thermal insulation and curing film material for cement concrete structures, which includes, from top to bottom, a PVC film layer (11), a self-heating layer (12) and a water-absorbing layer (13).

[0026] The self-heating layer (12) is mainly composed of quicklime, iron powder, activated carbon and salt.

[0027] The absorbent layer (13) is composed of sodium polyacrylate, a superabsorbent polymer, with a particle size of 100-120 mesh.

[0028] The self-heating reaction time of the self-heating layer (12) is controlled between 5 and 10 hours.

[0029] Both the absorbent layer (13) and the self-heating layer (12) are encapsulated with non-woven fabric (14).

[0030] The thickness of the overall thin film material (1) is between 4 and 6 mm.

[0031] The specific implementation steps are as follows:

[0032] (1) Material packaging combination: according to the specific situation of the road, the corresponding self-heating layer (12) and water absorption layer (13) are configured, the self-heating layer (12) and the water absorption layer (13) are respectively packaged and bonded with non-woven fabric (14), after the bonding is completed, the PVC film layer (11) is placed on the self-heating layer (12), and the whole is integrated into a new type of self-heating and heat preservation and maintenance film material for cement concrete structure;

[0033] (2) Film covering: after the road construction is completed, the new type of self-heating and heat preservation and maintenance film material for cement concrete structure is covered after once spraying excess water, and wood, sand or soil is placed at all edges and joints until the film is lifted after the maintenance is completed.

[0034] For those skilled in the art, various corresponding changes and deformations can be made according to the above technical solutions and concepts, and all these changes and deformations should belong to the protection scope of the claims of the present application.

Claims

1. A novel self-heating thermal insulation and curing film material for cement concrete structures, characterized in that: From top to bottom, it includes a PVC film layer (11), a self-heating layer (12), and a water-absorbing layer (13); The self-heating layer (12) is mainly composed of quicklime, iron powder, activated carbon and salt; The absorbent layer (13) is composed of sodium polyacrylate, a superabsorbent polymer, with a particle size of 100-120 mesh. The self-heating reaction time of the self-heating layer (12) is controlled between 5 and 10 hours; Both the absorbent layer (13) and the self-heating layer (12) are encapsulated with non-woven fabric (14).

2. The novel self-heating thermal insulation and curing film material for cement concrete structures according to claim 1, characterized in that: The overall thickness of the thin film material (1) is between 4 and 6 mm.

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