Method for paving prefabricated coilable engineered cementitious composites (ECC)

A composite material, cement-based technology, used in road repair, climate change adaptation, roads, etc., can solve problems such as the paving of ECC materials that cannot be well adapted, the sustainability of reinforced concrete structures, and the lack of effective solutions for processes. , to achieve the effect of overcoming the late opening of traffic, the rapid opening of traffic, and shortening the construction time.

Inactive Publication Date: 2011-06-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As a building material, the performance of cement concrete has been improved to a certain extent, but there are still deficiencies when it is applied to infrastructure construction, mainly in the following three aspects: brittle failure under extreme loads; Fatigue damage; sustainability issues in reinforced concrete structures
[0005] Regarding cement concrete pavement (bridge deck) paving technologies, there are common slipform mechanical pa...

Method used

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  • Method for paving prefabricated coilable engineered cementitious composites (ECC)
  • Method for paving prefabricated coilable engineered cementitious composites (ECC)
  • Method for paving prefabricated coilable engineered cementitious composites (ECC)

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Embodiment Construction

[0017] In the preparation of ECC components:

[0018] Prefabricated ECC components, the length is 100m~200, the width is 3~4m (adjusted according to the width of the lane), and the thickness is 1~5cm.

[0019] ② Composition of ECC materials: cement, fly ash, quartz sand, water, water reducing agent, polyvinyl alcohol fiber (PVA).

[0020] ③ The mixing ratio design of ECC materials, the mass ratio between cement: fly ash: quartz sand: water: superplasticizer is 1: 1.2: 0.8: 0.2: 0.013, and the content of PVA fiber is the total volume 2%. Among them, in order to reduce the amount of cement to reduce the cost, the content of fly ash can be increased to replace part of the cement, and the mass ratio of fly ash to cement can reach 5.6. At the same time, with the increase of the amount of fly ash, the ductility of ECC materials will increase. The increase will be more conducive to the crimping of prefabricated ECC components.

[0021] The operation of the process should me...

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Abstract

The invention provides a method for paving prefabricated coilable engineered cementitious composites (ECC), which comprises the following steps: 1, prefabricating an ECC component, wherein the length of the ECC component is 100-200 m, the width is 3-4 m, and the thickness is 1-5 cm; 2, arranging a roller (1) on a support (4), and connecting a centre shaft of the roller (1) with a motor (3) so as to form a coiling device; 3, lifting one end of the prefabricated ECC component so as to lap the end of the prefabricated ECC component on the roller (1) of the coiling device, and on a length of the ECC component close to the lifted part of the ECC component, arranging a plurality of antiskid hairbrush boards (2) which cross the width of the ECC; 4, starting the motor (3) so as to clockwise drive the roller (1) to rotate by the centre shaft of the roller (1) and then coil the ECC component; and 5, transporting the roller (1) coiling the ECC component to a road construction site, aligning the two side edges of the roller with the direction of a lane, and reversely pushing the roller, then gradually releasing the ECC component to pave on a substrate or a surface layer until the paving is completed.

Description

technical field [0001] The invention belongs to the technical field of cement concrete pavement (bridge deck) construction, and in particular relates to prefabricated rollable high ductility cement-based composite material pavement equipment and technology. Background technique [0002] As a building material, the performance of cement concrete has been improved to a certain extent, but there are still deficiencies when it is applied to infrastructure construction, mainly in the following three aspects: brittle failure under extreme loads; Fatigue damage; Sustainability issues in reinforced concrete structures. High-ductility fiber-reinforced cementitious composite (engineered cementitious composite, abbreviated ECC) is a fiber-reinforced cementitious composite material that exhibits high ductility under tensile and shear loads through systematic design. ECC adopts a material design method based on micromechanics. The volume content of polyvinyl alcohol fiber (PVA) is only ...

Claims

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Application Information

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IPC IPC(8): E01C19/00
CPCY02A30/30
Inventor 钱吮智薛彦卿
Owner SOUTHEAST UNIV
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