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A kind of high-permeability recycled aggregate concrete and preparation method thereof
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A technology of recycled aggregate and concrete, applied in the field of concrete, can solve the problem of the decline of concrete frost resistance, achieve the effect of improving water permeability and ensuring synergy
Active Publication Date: 2022-08-05
杭州舟桥建材有限公司
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[0005] In order to alleviate the problem of the decrease of concrete frost resistance caused by permeable concrete, and to balance the water permeability and frost resistance of permeable concrete, the application provides a high water permeability recycled aggregate concrete and its preparation method
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preparation example 1
[0047] Preparation Example 1, a modified reinforcing fiber, the selection of each raw material component and its corresponding amount are shown in Table 1, and it is obtained by mixing and stirring silane-modified polyether and reinforcing fiber.
[0048] Wherein, the above-mentioned silane-modified polyether is STP-E15 (MS glue) purchased from KANEKA.
preparation example 2～3
[0049] Preparation Examples 2 to 3, a modified reinforcing fiber, differ from Preparation Example 1 in that the selection of each raw material component and the corresponding amount thereof are shown in Table 1.
[0050] Selection of raw materials and their corresponding amounts in the preparation examples 1-3 of table 1 modified reinforcing agents
[0051]
[0052] Among them, the average length of polypropylene fibers is 12 mm; the average length of polyvinyl alcohol fibers is 8 mm, and the length of glass fibers is 8 mm.
[0053] Preparation example of slow-release air-entraining agent
[0054] Preparation Example 1, a slow-release air-entraining agent, the selection of each raw material component and its corresponding consumption are shown in Table 2, and prepared according to the following steps:
[0055] S1-1: the sodium alginate solution is sprayed on the surface of the air-entraining agent, fully mixed to obtain the first particle;
[0058] Preparation Example 2, a slow-release air-entraining agent, the selection of each raw material component and its corresponding consumption are shown in Table 2, and prepared according to the following steps:
[0059] S1-1: the sodium alginate solution is sprayed on the surface of the second air-entraining agent, fully mixed to obtain the first particle;
[0060] S1-2: get calciumsalt solution and spray it on the surface of the first particle, mix well, leave standstill at room temperature to dry for 3h, to obtain the second particle;
[0061] S1-3: spray the carboxylate solution on the surface of the second particles, mix evenly, and then dry at 60° C. for 10 minutes to obtain a slow-release air-entraining agent.
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Abstract
The invention relates to the field of concrete, in particular to a highly permeable recycled aggregate concrete and a preparation method thereof. The highly permeable recycled aggregate concrete includes the following components in parts by mass: cement: 100-120 parts; mineral powder: 20-40 parts; stones: 500-650 parts; water: 50-80 parts; water reducing agent: 2-3 parts recycled fine aggregate: 100-120 parts; air-entraining components: 0.1-0.3 parts; modified reinforcing fibers: 4-8 parts; the modified reinforcing fibers are reinforced fibers coated with silane-modified polyether fiber. The highly water-permeable recycled aggregate concrete prepared in the present application has excellent water-permeability and can maintain good frost resistance at the same time.
Description
technical field [0001] The invention relates to the field of concrete, in particular to a highly permeable recycled aggregate concrete and a preparation method thereof. Background technique [0002] With the acceleration of urbanization in my country, many urban surface areas are covered by concrete facilities such as buildings or roads, making it difficult for rainwater to penetrate the surface, causing serious urban waterlogging disasters. Therefore, in order to alleviate the problem of urban waterlogging, pervious concrete with porous structure is widely used in the construction of urban roads. [0003] In order to improve the water permeability of permeable concrete, pervious concrete usually uses less cementitious materials and fine aggregates than conventional concrete to reduce the filler in the pores between the coarse aggregates, thereby increasing the content of the pore structure with permeable function. . [0004] The inventor believes that reducing the amount ...
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