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Device and method for performing construction by taking marine sand as concrete fine aggregates

A technology of fine aggregate and concrete, which is applied in the direction of building insulation materials, formwork/formwork/working frames, and on-site preparation of building components, which can solve the problems of reducing the durability of buildings, unusable, high concentration of chloride ions in sea sand and other problems, to achieve the effect of prolonging the service life, protecting against corrosion, and thoroughly removing chlorine

Active Publication Date: 2016-06-15
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the vast coastal and island areas, the amount of freshwater sand is limited, while sea sand is abundant. However, there are a large amount of chloride ions in sea sand that are corrosive to steel bars, which will reduce the durability of buildings.
So there is a helpless and embarrassing situation. On the one hand, when constructing concrete in coastal and island areas, it takes a lot of manpower and material resources to transport freshwater sand from the inland as fine aggregate; idle, unusable
In order to solve the above problems, some people naturally proposed the idea of ​​using sea sand as fine aggregate, but there is an objective technical problem in this idea, that is, the concentration of chloride ions in sea sand is too large, and it is difficult for the existing sea sand desalination technology to The concentration of chloride ions in sea sand is reduced to a range that meets the safety standards for reinforced concrete structures

Method used

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  • Device and method for performing construction by taking marine sand as concrete fine aggregates
  • Device and method for performing construction by taking marine sand as concrete fine aggregates
  • Device and method for performing construction by taking marine sand as concrete fine aggregates

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 , figure 2 , image 3 , Figure 4 Shown, the present invention utilizes sea sand as concrete fine aggregate to carry out the device of construction, and it comprises DC power supply and the formwork 1 that is used for pouring concrete. The inner surface of the template 1 is provided with a chute 2, the bottom of the chute 2 is fixed with a stainless steel plate 3, and the chute 2 is fitted with a pumping plate 4 with the same length as the chute 2. When the pumping plate 4 fits in the chute 3, the bottom three of the pumping plate 4, the stainless steel plate 3 and the chute 2 abut against each other in sequence. The opening of the chute 2 is located on one side of the formwork 1, that is to say, one end of the chute 2 is open and the other end is closed, and the open end of the chute 2 extends to one side of the fo...

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Abstract

The invention discloses a device and a method for performing construction by taking marine sand as concrete fine aggregates. The device comprises a direct-current power supply and a template (1), wherein a sliding groove is formed in the inner surface of the template (1); a stainless steel plate (3) is arranged at the bottom of the sliding groove; a drawer plate is arranged in the sliding groove in a sliding-fit manner; a conductive net (11) is embedded in the inner side of a steel reinforcement cage (8) of a concrete structure (6); a positive electrode of the direct-current power supply is connected with the stainless steel plate (3) through a lead wire; and a negative electrode of the direct-current power supply is connected with the conductive net (11). The method comprises the following key steps: pouring and tamping the concrete aggregates; in 2-4 days, pulling out the drawer plate and sealing an opening of the sliding groove with a seal strip (5), so that the surface of the concrete structure (6), the seal strip (5) and the sliding groove form a sealed chamber; and filling the chamber with an electrolyte solution (7), so that chlorine ions in the concrete structure (6) are migrated to the electrolyte solution (7). According to the device and method, the chlorine ion concentration of the marine sand can be effectively reduced.

Description

technical field [0001] The invention relates to the field of reinforced concrete durability in coastal areas, in particular to a construction device and construction method using sea sand as concrete fine aggregate. Background technique [0002] Concrete aggregate refers to the granular loose material that acts as a skeleton or filling in concrete. It is divided into coarse aggregate and fine aggregate. Coarse aggregate includes pebbles, crushed stones, waste residue, etc., and fine aggregate includes sand, fly ash Wait. The sand generally adopts freshwater sand such as river sand and lake sand. However, in the vast coastal and island areas, the amount of freshwater sand is limited, while sea sand is abundant. However, there are a large amount of chloride ions in sea sand that are corrosive to steel bars, which will reduce the durability of buildings. So there is a helpless and embarrassing situation. On the one hand, when constructing concrete in coastal and island areas,...

Claims

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Application Information

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IPC IPC(8): E04B1/64E04G15/06
CPCE04B1/642E04G15/063
Inventor 毛江鸿金伟良潘崇根徐方圆许晨崔磊沈建生
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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