Preparation method of pineapple leaf fiber reinforced cement-based composite material

Abstract

The invention relates to the technical field of pineapple leaf fiber reinforced cement-based composite materials, in particular to a preparation method of a pineapple leaf fiber reinforced cement-based composite material, which comprises the following steps: extracting an optimal mix proportion of the pineapple leaf fiber reinforced cement-based composite material, and obtaining different mixing amounts of pineapple leaf fiber cement-based materials; carrying out workability test and theoretical analysis on the pineapple leaf fiber reinforced cement-based composite material to obtain the pineapple leaf fiber reinforced cement-based composite material; carrying out a basic mechanical property test on the pineapple leaf fiber reinforced cement-based composite material; analyzing and comparing the pineapple leaf fiber reinforced cement-based composite material, and testing the thermal insulation performance of the pineapple leaf fiber reinforced cement-based composite material. According to the preparation method, the problem that the utilization rate of crop waste is low is effectively solved, the tensile strength, toughness and crack resistance of the cement-based material can be effectively improved by adding the fibers, and the situation that the cement-based material is prone to cracking in engineering is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pineapple leaf fiber reinforced cement-based composite materials, and in particular to a preparation method of a pineapple leaf fiber reinforced cement-based composite material. Background Art

[0002] Cement-based composite materials are widely used in construction projects, but traditional cement-based materials have disadvantages such as low tensile strength, poor toughness, and easy cracking. Pineapple leaf fiber is a natural fiber resource with good chemical composition. It is an important natural fiber with higher specific strength, stiffness, bending and torsional stiffness than other fibers. Natural fibers have the advantages of low density and low cost.

[0003] Traditional cement-based materials are brittle and have low tensile strength, which makes them easy to crack and have poor durability. Existing cement-based materials are prone to cracking during engineering projects, which can easily lead to a waste of resources.

[0004] Based on this, a method for preparing a pineapple leaf fiber reinforced cement-based composite material is now provided, which can eliminate the disadvantages of the existing device. Summary of the invention

[0005] In view of the above problems, a method for preparing a pineapple leaf fiber reinforced cement-based composite material is provided. The method solves the problem that the existing cement-based materials are prone to cracking in engineering.

[0006] In order to solve the problems in the prior art, the present invention provides a method for preparing a pineapple leaf fiber reinforced cement-based composite material, the preparation method comprising the following steps:

[0007] (1) Propose the optimal mix ratio of pineapple leaf fiber reinforced cement-based composite materials and obtain cement-based materials with different dosages of pineapple leaf fibers;

[0008] (2) Conducting performance tests and theoretical analysis on pineapple leaf fiber reinforced cement-based composite materials to obtain pineapple leaf fiber reinforced cement-based composite materials;

[0009] (3) Conducting basic mechanical property tests on the pineapple leaf fiber reinforced cement-based composite material;

[0010] (4) Analyze and compare the pineapple leaf fiber reinforced cement-based composite materials, and conduct a thermal insulation performance test on the pineapple leaf fiber reinforced cement-based composite materials.

[0011] Preferably, in step (1), obtaining the pineapple leaf fiber cement-based material with different admixture amounts specifically comprises: determining the amounts of each component of the mix ratio by three coefficients of water-gel, sand ratio and admixture addition amount, and then shaping it by a predetermined stirring time and stirring at different speeds.

[0012] Preferably, in step (2), the ease of handling properties include fluidity, cohesiveness and water retention.

[0013] Preferably, in step (3), the basic mechanical properties test mainly includes: optimizing the mix ratio; casting the concrete into shape; and measuring its compressive strength.

[0014] Preferably, in step (4), the thermal insulation performance test includes: optimizing the mix ratio of the pineapple leaf fiber reinforced cement-based composite material; casting the concrete under the condition of good workability; measuring its thermal insulation performance, and exploring the influence of the pineapple leaf fiber content on the thermal conductivity of the pineapple leaf fiber reinforced cement-based composite material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention effectively solves the problem of low utilization rate of crop waste through the preparation method of pineapple leaf fiber reinforced cement-based composite material, has very high application value and economic value, can reduce waste of resources, improve the overall utilization of agricultural waste, and realize high-efficiency, high-value-added operation mode. The addition of fiber can effectively improve the tensile strength, toughness and crack resistance of cement-based materials, thereby extending the service life of buildings and avoiding the situation that cement-based materials are easy to crack in engineering, thereby causing waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall technical roadmap for the preparation method of pineapple leaf fiber reinforced cement-based composite materials.

[0018] Figure 2 The invention discloses a preparation flow chart of a method for preparing a pineapple leaf fiber reinforced cement-based composite material. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figure 1-Figure 2 : A method for preparing a pineapple leaf fiber reinforced cement-based composite material, the preparation method comprising the following steps:

[0021] (1) According to the optimal mix ratio of pineapple leaf fiber reinforced cement-based composite materials, cement-based materials with different dosages of pineapple leaf fibers are obtained;

[0022] (2) Conducting performance tests and theoretical analysis on pineapple leaf fiber reinforced cement-based composite materials to obtain pineapple leaf fiber reinforced cement-based composite materials;

[0023] (3) Conducting basic mechanical property tests on the pineapple leaf fiber reinforced cement-based composite material;

[0024] (4) Analyze and compare the pineapple leaf fiber reinforced cement-based composite materials, and then conduct a thermal insulation performance test on them.

[0025] 1. First, cement and aggregate (sand, gravel, etc.) are mixed evenly in a certain proportion. Ordinary silicate cement, sulphoaluminate cement or other suitable cement varieties are selected for cement, and natural sand, machine-made sand or crushed stone are selected for aggregate; 2. During the mixing process, a certain amount of water and admixture are gradually added and ensure that the admixture is evenly dispersed in the slurry, and the mixing is continued until the mixture becomes uniform. The admixture is a water reducer, a thickener or an early strength agent; 3. Then, the fiber is gradually and evenly added to the mixer and the mixing is continued until the fiber is evenly distributed in the mixture. The fiber is pineapple leaf fiber; 4. Each test is performed by adding 0.5, 1, 1.5, 2 and 2.5 percentages of fiber, and different tests are performed. The test results are shown in Table 1 below: 5. The mixed fiber-reinforced cement-based composite material is poured into a mold for molding; the molded composite material is cured for 28 days at a temperature of 20°C ± 2°C and a relative humidity of more than 95%; 6. The cured fiber-reinforced cement-based composite material is tested for various performance indicators, such as strength, toughness, crack resistance, etc., to ensure that it meets the design requirements and relevant standards.

[0026] Table 1 Early compressive strength of pineapple leaf fiber self-compacting concrete with different dosages Early compressive strength of pineapple leaf fiber self-compacting concrete with different dosages

[0027]

[0028] According to Figure 1, it can be clearly seen that adding 1-2% of fiber can effectively improve the compressive strength of concrete.

[0029] Reference Figure 1-Figure 2 : In step (1), obtaining the pineapple leaf fiber cement-based material with different dosages specifically comprises:

[0030] The amount of each component in the mix ratio is determined by the three coefficients of water-binder, sand ratio and admixture addition, and then it is formed by a predetermined mixing time and mixing at different speeds.

[0031] Reference Figure 1-Figure 2 : In step (2), the properties include fluidity, cohesiveness and water retention.

[0032] Reference Figure 1-Figure 2 : In step (3), the basic mechanical properties test mainly includes:

[0033] Optimize its mix ratio;

[0034] Pour the concrete into shape;

[0035] and measuring its compressive strength.

[0036] Reference Figure 1-Figure 2 : In step (4), the thermal insulation performance test includes:

[0037] Optimizing the mix ratio of the pineapple leaf fiber reinforced cement-based composite material;

[0038] Pour the concrete into shape;

[0039] The thermal insulation performance was measured, and the effect of the pineapple leaf fiber dosage on the thermal conductivity of the pineapple leaf fiber reinforced cement-based composite material was explored.

[0040] The results show that the tensile strength of the composite material is 5.5MPa, the flexural strength is 10.2MPa, and the compressive strength is 41.3Mpa. In summary, the performance of the composite material is significantly better than that of traditional cement-based materials. The tensile strength, flexural strength and compressive strength of the fiber-reinforced cement-based composite are significantly higher than those of traditional cement-based materials. It can also effectively inhibit the generation and expansion of cracks, improve the crack resistance of the composite material, and has good impermeability, frost resistance and corrosion resistance, and can be used for a long time under harsh environmental conditions.

[0041] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A method for preparing a pineapple leaf fiber reinforced cement-based composite material, characterized in that: The preparation method comprises the following steps: (1) According to the optimal mix ratio of pineapple leaf fiber reinforced cement-based composite materials, cement-based materials with different dosages of pineapple leaf fibers are obtained; (2) Conducting performance tests and theoretical analysis on pineapple leaf fiber reinforced cement-based composite materials to obtain pineapple leaf fiber reinforced cement-based composite materials; (3) Conducting basic mechanical property tests on the pineapple leaf fiber reinforced cement-based composite material; (4) Analyze and compare the pineapple leaf fiber reinforced cement-based composite materials, and then conduct a thermal insulation performance test on them.

2. The method for preparing a pineapple leaf fiber reinforced cement-based composite material according to claim 1, wherein: In step (1), obtaining the pineapple leaf fiber cement-based material with different dosages specifically comprises: The amount of each component in the mix ratio is determined by the three coefficients of water-binder, sand ratio and admixture addition, and then it is formed by a predetermined mixing time and mixing at different speeds.

3. The method for preparing a pineapple leaf fiber reinforced cement-based composite material according to claim 1, characterized in that: In step (2), the ease of use includes fluidity, cohesiveness and water retention.

4. The method for preparing a pineapple leaf fiber reinforced cement-based composite material according to claim 1, characterized in that: In step (3), the basic mechanical properties test mainly includes: Optimize its mix ratio; Pour the concrete into shape; and measuring its compressive strength.

5. The method for preparing a pineapple leaf fiber reinforced cement-based composite material according to claim 1, characterized in that: In step (4), the thermal insulation performance test includes: Optimizing the mix ratio of the pineapple leaf fiber reinforced cement-based composite material; Pour the concrete into shape; The thermal insulation performance was measured, and the effects of different dosages of the pineapple leaf fiber on the thermal conductivity of the pineapple leaf fiber-reinforced cement-based composite material were explored.

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