Constant-nutrient low-alkali concrete hollow wallboard and preparation method thereof

Abstract

The invention relates to the field of concrete wallboards, in particular to a constant-maintenance low-alkali concrete hollow wallboard and a preparation method thereof, and the constant-maintenance low-alkali concrete hollow wallboard comprises the following dry materials in percentage by weight: 24-26% of low-alkalinity sulphoaluminate cement; 7-9% of lightweight aggregate; 50-70% of industrial solid waste; 3-5% of ceramsite; 2-4% of silica sand powder; 1% of an additive; the weight ratio of the water to the dry materials is 1: 1. The method has the beneficial effects that the performance and quality of the concrete hollow wallboard are improved by adopting innovative technologies of low-alkalinity sulphoaluminate cement, mineral powder admixture and the like and adopting water curing and constant-temperature curing processes, so that the durability, crack resistance and sound insulation effect of the wallboard are improved, the strength is improved, the construction efficiency is improved, and the construction cost is reduced. And the advancement of technical regulations in the aspect of technical innovation is shown.

Description

Technical Field

[0001] The present invention relates to the field of concrete wallboards, and particularly to a constant-curing low-alkali concrete hollow wallboard and a preparation method thereof. Background Art

[0002] With the gradual implementation of prefabricated buildings across the country, as one of the main component parts used in prefabricated buildings, new interior partition slabs have been widely used, but many product drawbacks have also been exposed. For example: Extruded lightweight ordinary concrete hollow wallboards, although simple to produce and highly efficient, have poor self-stability and large shrinkage deformation, resulting in many cracking phenomena and being gradually phased out by the market; Autoclaved ceramsite concrete wallboards, although of good quality, have a complex production process and low production capacity, resulting in high costs and gradually withdrawing from the market, causing fewer and fewer manufacturers;

[0003] Currently, only ALC wallboards have become the mainstream, but there have always been problems such as low strength, average sound insulation performance, the need to open grooves for embedded water and electricity pipelines which is not environmentally friendly, and poor waterproof performance. Summary of the Invention

[0004] The present invention provides a technical solution to solve the above problems in order to overcome the above deficiencies.

[0005] A constant-curing low-alkali concrete hollow wallboard, the dry materials of which include the following components calculated by weight percentage:

[0006] Low-alkalinity sulphoaluminate cement 24 - 26%;

[0007] Lightweight aggregate 7 - 9%;

[0008] Industrial solid waste 50 - 70%;

[0009] Ceramsite 3 - 5%;

[0010] Silica sand powder 2 - 4%;

[0011] Admixture 1%;

[0012] Water with a weight ratio of 1:1 to the above dry materials.

[0013] As a further scheme of the present invention: It also includes 4 low-carbon 3.2mm cold-drawn steel wires.

[0014] A preparation method of a constant-curing low-alkali concrete hollow wallboard, comprising the following steps:

[0015] (1) Put low-alkalinity sulphoaluminate cement, lightweight aggregate, industrial solid waste, ceramsite, silica sand powder, admixture, and internally place 4 low-carbon 3.2mm cold-drawn steel wires;

[0016] (2) Then add water with a weight ratio of 1:1 to the above dry materials for mixing and stirring;

[0017] (3) After the finished product is initially solidified, cover it with 0.08-0.1mm film paper for natural steam curing. After 3 hours, the finished product is demoulded;

[0018] (4) Soak in water for another 8-10 minutes;

[0019] (5) Finally, the container is stored in the yard for 7-10 days.

[0020] Compared with the existing technology, the beneficial effects of the present invention are: by adopting innovative technologies such as low-alkalinity sulphoaluminate cement and adding mineral powder admixtures, and adopting water curing and constant temperature curing processes to improve the performance and quality of concrete hollow wall panels, not only the durability, crack resistance and sound insulation effect of the wall panels are improved, but also the strength is increased, the construction efficiency is improved, and the technical regulations are demonstrated to be advanced in technological innovation.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the following briefly introduces the drawings required for use in the embodiment or the prior art description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a preparation flow chart of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figure 1 ,

[0029] Example 1: 25% of low-alkalinity sulphoaluminate cement, 8% of lightweight aggregate, 60% of industrial solid waste, 4% of ceramsite, 3% of silica sand powder, 1% of admixture, and 4 low-carbon 3.2 mm cold-drawn steel wires are internally placed; then water with a weight ratio of 1:1 to the above dry materials is added for mixing and stirring; after the initial setting of the finished product, it is covered with a 0.08 mm thin film paper for natural steam curing, and the finished product is demoulded after 3 hours; then it is cured by soaking in water for 10 minutes; finally, it is left to stand in the yard for 10 days;

[0030] The performance of the constant-curing low-alkalinity concrete hollow wall panel made according to Example 1 is detected. The wall thickness of the surface layer (mm) is 21 (the national standard requirement is ≥20), the dry shrinkage value (mm / m) is 0.44 (the national standard requirement is ≤0.6), and the compressive strength (Mpa) is 8.3 (the national standard requirement is ≥5); it far exceeds the national standard, has a low dry shrinkage value, no cracking phenomenon after construction, high strength, a hollow structure, and better sound insulation performance than the same kind of prefabricated partition materials. The above products are detected according to the national standard GB / T23449-2009, and the test results are shown in the following table.

[0031] Example 2: 24% of low-alkalinity sulphoaluminate cement, 7% of lightweight aggregate, 70% of industrial solid waste, 5% of ceramsite, 4% of silica sand powder, 1% of admixture, and 4 low-carbon 3.2 mm cold-drawn steel wires are internally placed; then water with a weight ratio of 1:1 to the above dry materials is added for mixing and stirring; after the initial setting of the finished product, it is covered with a 0.08 mm thin film paper for natural steam curing, and the finished product is demoulded after 3 hours; then it is cured by soaking in water for 10 minutes; finally, it is left to stand in the yard for 10 days;

[0032] The performance of the constant-curing low-alkali concrete hollow wallboard made according to Example 2 was tested. The wall thickness of the surface layer (mm) was 21 (the national standard requirement is ≥20), the drying shrinkage value (mm / m) was 0.43 (the national standard requirement is ≤0.6), and the compressive strength (Mpa) was 8.1 (the national standard requirement is ≥5); far exceeding the national standard, with a low drying shrinkage value, no cracking phenomenon after construction, high strength, a hollow structure, and better sound insulation performance than the same kind of prefabricated partition materials. The above products were tested according to the national standard GB / T23449-2009, and the test results are shown in the following table.

[0033] Example 3: 26% of low-alkalinity sulphoaluminate cement, 9% of lightweight aggregate, 50% of industrial solid waste, 3% of ceramsite, 2% of silica sand powder, 1% of admixture, and 4 low-carbon cold-drawn steel wires with a diameter of 3.2 mm were internally placed; then water with a weight ratio of 1:1 of the above dry materials was added for mixing and stirring; after the initial setting of the finished product, it was covered with a 0.08 mm thin film paper for natural steam curing, and the finished product was demoulded after 3 hours; then it was cured by soaking in water for 10 minutes; finally, it was left to cure in the yard for 10 days;

[0034] The performance of the constant-curing low-alkali concrete hollow wallboard made according to Example 3 was tested. The wall thickness of the surface layer (mm) was 21 (the national standard requirement is ≥20), the drying shrinkage value (mm / m) was 0.45 (the national standard requirement is ≤0.6), and the compressive strength (Mpa) was 8.5 (the national standard requirement is ≥5); far exceeding the national standard, with a low drying shrinkage value, no cracking phenomenon after construction, high strength, a hollow structure, and better sound insulation performance than the same kind of prefabricated partition materials. The above products were tested according to the national standard GB / T23449-2009, and the test results are shown in the following table.

[0035] Analysis table of example results:

[0036]

[0037]

[0038] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0039] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A constant-curing low-alkali concrete hollow wall panel, characterized in that, The dry material includes raw materials containing the following components by weight percentage: Low-alkalinity sulphoaluminate cement 24-26%; Lightweight aggregate 7-9%; Industrial solid waste 50-70%; Ceramsite 3-5%; Silica sand powder 2-4%; Admixture 1%; Water with a weight ratio of 1:1 to the above dry material.

2. The constant-curing low-alkali concrete hollow wall panel according to claim 1, wherein, It also includes 4 low-carbon cold-drawn steel wires with a diameter of 3.2 mm.

3. A preparation method of a constant-curing low-alkali concrete hollow wallboard according to any one of claims 1-2, characterized in that, It includes the following steps: (1) Put low-alkalinity sulphoaluminate cement, lightweight aggregate, industrial solid waste, ceramsite, silica sand powder, admixture, and internally place 4 low-carbon cold-drawn steel wires with a diameter of 3.2 mm; (2) Then add water with a weight ratio of 1:1 to the above dry material and mix and stir; (3) After the initial setting of the finished product, cover it with a thin film paper of 0.08-0.1 mm and cure it naturally with steam. After 3 hours, the finished product is demoulded; (4) Then carry out soaking cure for 8-10 minutes; (5) Finally, let it stand still in the storage yard for 7-10 days.

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