Ultrahigh-strength and high-ductility marine concrete material and preparation method thereof

A marine concrete, ultra-high-strength technology, applied in the field of building materials, can solve problems such as failure, concrete structure damage, etc., and achieve the effect of convenient operation, convenient transportation, and huge technology

Inactive Publication Date: 2019-09-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is forbidden to use seawater, sea sand or coral sand in concrete construction mainly because the chloride ions in sea water, sea sand or coral sand will corrode the steel bars in reinforced concrete members, and the rust swelling products of steel bars will eventually cause concrete structures. damage and failure

Method used

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  • Ultrahigh-strength and high-ductility marine concrete material and preparation method thereof
  • Ultrahigh-strength and high-ductility marine concrete material and preparation method thereof
  • Ultrahigh-strength and high-ductility marine concrete material and preparation method thereof

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Effect test

Embodiment 1

[0035] According to a kind of ultra-high strength and high ductility marine concrete material proposed by the present invention and preparation method thereof, its mixing ratio is shown in Table 1: (mass part ratio)

[0036]

[0037] The mix proportion of marine concrete material in table 1 embodiment 1

[0038] The cement is Portland cement; the ultra-high molecular weight synthetic fiber is polyethylene fiber with a length of 12 mm and a diameter of 38 μm; the seawater chloride ion concentration is 10000 mg / L.

[0039] A kind of ultra-high strength and high ductility marine concrete material proposed according to the present invention and its preparation method comprise the following steps:

[0040] 1) Dry mix cement, silica fume and sea sand with a mixer for 3 minutes to obtain a uniform dry mix;

[0041] 2) Mix and stir the water reducer and seawater for 2 minutes to obtain a uniformly mixed mixture;

[0042] 3) Pour the mixed solution into the dry mix and stir for 5 ...

Embodiment 2

[0048] According to a kind of ultra-high strength and high ductility marine concrete material proposed by the present invention and its preparation method, its mixing ratio is shown in Table 2:

[0049] The compounding ratio of embodiment 2 is shown in Table 2: (mass part ratio)

[0050]

[0051] The mix proportion of marine concrete material in table 2 embodiment 2

[0052] The cement is ordinary Portland cement; the ultra-high molecular weight synthetic fiber is carbon fiber with a length of 12 mm and a diameter of 24 μm; the seawater chloride ion concentration is 20000 mg / L.

[0053] A kind of ultra-high strength and high ductility marine concrete material proposed according to the present invention and its preparation method comprise the following steps:

[0054] 1) Dry mix cement, silica fume and sea sand with a mixer for 3 minutes to obtain a uniform dry mix;

[0055] 2) Mix and stir the water reducer and seawater for 2 minutes to obtain a uniformly mixed mixture;

...

Embodiment 3

[0062] According to a kind of ultra-high strength and high ductility marine concrete material proposed by the present invention and its preparation method, its mixing ratio is shown in Table 3:

[0063] The compounding ratio of embodiment 3 is shown in Table 3: (mass part ratio)

[0064]

[0065] The mix proportion of marine concrete material in table 3 embodiment 3

[0066] The cement is composite Portland cement; the ultra-high molecular weight synthetic fiber is Kevlar fiber with a length of 8 mm and a diameter of 24 μm; the seawater chloride ion concentration is 30000 mg / L.

[0067] A kind of ultra-high strength and high ductility marine concrete material proposed according to the present invention and its preparation method comprise the following steps:

[0068] 1) Dry mix cement, silica fume and sea sand with a mixer for 5 minutes to obtain a uniform dry mix;

[0069] 2) Mix and stir the water reducing agent and seawater for 3 minutes to obtain a uniform mixed solut...

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Abstract

The invention discloses an ultrahigh-strength and high-ductility marine concrete material and a preparation method thereof. The marine concrete material is a cement-based composite material. The cement-based composite material uses seawater, marine gravels and cement as raw materials which are subjected to mixing treatment to obtain the marine concrete material with compressive strength of larger than 150 MPa and ductility of larger than 6% under uniaxial tensile load. According to the invention, by adoption of the seawater to replace fresh water as mixing water, sea sand or coral sand to replace fine quartz sand or river sand as an aggregate and ultra-high-molecular-weight synthetic fiber as a micro-energy dissipative component, an ultra-high strength and high-ductility marine concrete material with the compressive strength exceeding 150 MPa and the ductility of larger than 6% under uniaxial tensile load can be prepared; thus, problems like shortage of fresh water and deterioration of the ecological environment can be alleviated; meanwhile, great technical benefits, economic benefits and environmental protection benefits brought by marine resourceful utilization can be realized.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an ultra-high-strength, high-ductility marine concrete material and a preparation method thereof. Background technique [0002] In recent years, as the country has continuously increased its investment in marine engineering, the demand for related supporting building infrastructure has increased sharply, such as large-scale marine terminals, marine base stations, marine lighthouses, subsea tunnels, marine airports, coastal defense fortifications and other basic buildings. As we all know, fresh water and quartz sand (or river sand) are included in the traditional building materials. However, the construction of marine engineering is often carried out on land along the coast, near the coast, or even in harsh environments such as reefs and islands far away from the land. If fresh water and quartz sand (or river sand) are used, then the sea transportation cost will be inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/08
CPCC04B28/04C04B28/08C04B2201/50C04B22/0026C04B14/068C04B18/146C04B24/24C04B16/0625C04B14/386C04B16/0691
Inventor 郭丽萍吴建东
Owner SOUTHEAST UNIV
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