Impermeable concrete and preparation method thereof
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A technology of impermeable concrete and waste rubber, which is applied in the field of concrete, can solve the problems of concrete strength reduction, etc., and achieve the effects of improving flexural strength, improving mechanical properties, and reducing production costs
Inactive Publication Date: 2020-09-25
昊丰赢(上海)新材料科技有限公司
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Therefore, when the volume of waste rubber particles replaces part of the aggregate by equal volume, it will not exceed 10%, otherwise the strength of concrete will be significantly reduced, resulting in the contradiction between the strength requirements of concrete and the large-scale and full utilization of waste rubber particles.
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Embodiment 1
[0053] Embodiment 1: as figure 1 , a kind of impervious concrete, each component and its corresponding parts by weight are shown in Table 1, and are prepared through the following steps:
[0054] S1, mix mineral powder, fly ash, sand and fine stone and stir evenly, add cement and continue stirring evenly to obtain base material mixture;
[0055] S2, mix the modified waste rubber particles with the same weight of water, add PVA fibers with an average length of 6mm and an average diameter of 16mm, mix with a mortar mixer for 1.5h, and dry at 60°C for 4h to obtain PVA fiber modified waste rubber particles;
[0056] S3, adding the water reducer to the remaining water and stirring evenly to obtain a water reducer solution;
[0057] S4, mixing the base material mixture and the PVA fiber-modified waste rubber particle mixture C, adding a water reducer solution and stirring evenly to obtain impermeable concrete.
[0058] In this example, the preparation steps of modified waste rubber...
Embodiment 2-6
[0059] Example 2-6: An anti-seepage concrete, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.
[0060] Each component and parts by weight thereof in table 1 embodiment 1-6
[0061]
Embodiment 7
[0062] Example 7: An impermeable concrete, the difference from Example 1 is that in this example, the preparation steps of modified waste rubber particles are: adding 1 part of waste rubber particles with a fineness of 18 mm to 4 parts Soak in 1mol / L NaOH solution for 3 hours, then wash the waste rubber particles with clean water to pH = 8.0, dry at 80°C, soak in 6 parts of absolute ethanol with 4 parts of silane coupling agent for 3 hours, wash with water Wash and dry at 80°C to obtain modified waste rubber particles.
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Abstract
The invention discloses impermeable concrete and a preparation method thereof, and relates to the technical field of concrete. According to the technical key points, the impermeable concrete comprisesthe following components in parts by weight: 350 to 400 parts of cement, 120 to 150 parts of water, 600 to 650 parts of sand, 900 to 1000 parts of fine stone, 60 to 80 parts of fly ash, 80 to 100 parts of mineral powder, 3 to 5 parts of a water reducing agent, 60 to 195 parts of modified waste rubber granules, and 9 to 30 parts of PVA fiber; the preparation method of the modified waste rubber granules comprises the following steps: adding the waste rubber granules into a 1 mol/L NaOH solution according to a weight ratio of 1:4, soaking the rubber granules for 2-3 h, cleaning the waste rubbergranules with water until the pH value is equal to 8, drying the rubber granules, soaking the rubber granules in absolute ethyl alcohol with a silane coupling agent for 2-3 h, cleaning the rubber granules, and drying the rubber granules to obtain the modified waste rubber granules. The waste rubber granules doped into the impermeable concrete account for 30% of the fine aggregate to the maximum extent, and the impermeable concrete has the advantages that the waste rubber granules are fully utilized and the mechanical property of the concrete is high.
Description
technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to an anti-seepage concrete and a preparation method thereof. Background technique [0002] In recent years, the crushing technology of crushing a large number of waste tires produced by the automobile industry into waste rubber powder has effectively promoted the transformation of waste rubber powder into treasure and the elimination of black pollution. Scholars at home and abroad have tried to use the unique flexibility and impact resistance of waste rubber powder It can be used to modify plastics, asphalt, mortar concrete, etc., and then applied to construction floors, urban gardens, anti-collision barriers and other engineering fields, and achieved good economic and social benefits. Existing studies have found that when coarse waste rubber powder and fine waste rubber powder are used to replace the coarse aggregate in concrete, compared with ordinary concrete, t...
Claims
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