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ECC-concrete interface treating method

A treatment method and concrete technology, which is applied to artificial islands, underwater structures, protective devices, etc., can solve problems such as water seepage, achieve the effects of increasing seepage paths, enhancing cohesive force, and improving impermeability

Inactive Publication Date: 2018-11-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of water seepage caused by cracks in the ECC-concrete interface, and provides a treatment method for the ECC-concrete interface

Method used

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Embodiment 1

[0017] Embodiment 1: as Figure 1-2 As shown, the preferred strength grade of the concrete layer 1 in this embodiment is C30, and the mixing ratio is calculated by mass ratio, cement: Class II fly ash: fine aggregate: coarse aggregate: water: water reducing agent = 1:0.20: 3.0:4.2:0.66:0006. The preferred mixing ratio of the ECC layer 2 is in terms of mass ratio, cement: Class I fly ash: quartz sand: water: superplasticizer: fiber = 1: 1.20: 0.72: 0.57: 0.003: 0.0379. Both the concrete layer 1 and the ECC layer 2 adopt semicircular platform test blocks, the upper and lower bottom surfaces are semicircular, the diameters are 175mm and 185mm respectively, and the height is 150mm. Before pouring, use the corrugated formwork to separate the round platform mold, etc., pour the concrete first, and remove the formwork after 24 hours. Within 24 hours after demoulding, the corrugated interface 3 shall be treated and interface agent shall be applied, and the ECC layer 2 shall be poure...

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Abstract

The invention discloses an ECC (Engineering Fiber Reinforced Cementitious Composites)-concrete interface treating method and belongs to the field of tunnel and underground concrete structure and hydraulic structure engineering technology. An interface is parallel to a water penetration direction, and an ECC-concrete sample is partitioned by a corrugated plate during pouring, so that an ECC-concrete interface is corrugated. The ECC-concrete interface is brushed with an interface agent, so that the ECC-concrete bonding area is increased, a longer penetration path is obtained, and accordingly, the interface penetration performance is improved. By adoption of the ECC-concrete interface treating method, the durability of tunnel and underground concrete structures and hydraulic concrete structures can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of tunnels, underground concrete structures, and hydraulic structure engineering, and specifically designs a treatment method for the ECC-concrete interface. Background technique [0002] The permeability of cement-based materials such as concrete used in hydraulic structures is considered to be one of the key factors affecting the life cycle of hydraulic structures. Ordinary concrete surfaces in traditional structures are naturally exposed and have low durability. In addition, the cracking problem of ordinary concrete will not only affect the normal operation of the hydraulic structure, but also affect its service life, and even seriously affect the safe operation of the structure. High-toughness fiber reinforced cementitious composites (Engineering Fiber Reinforced Cementitious Composites, referred to as ECC) provides a new solution for the cracking and leakage of tunnels, underground structures and concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D31/02E02D29/16E02B3/16C04B28/00
CPCE02B3/16E02D29/16E02D31/02C04B28/00C04B18/08C04B2103/0068Y02A30/30
Inventor 李晓琴杨潇丁祖德文锦诚
Owner KUNMING UNIV OF SCI & TECH
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