Maritime work concrete and construction method

A kind of marine concrete and concrete technology, which is applied in the field of concrete, can solve the problems of not forming a reasonable, economical and effective marine durable concrete construction method, unsuitable early strength of concrete structure, copying concrete formula, etc., to achieve good appearance, Avoid steel corrosion, low cost effect

Inactive Publication Date: 2008-09-24
CHINA RAILWAY HI TECH IND CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to copy foreign durable concrete formulas for marine engineering to China. If foreign formulas are copied to China, not only the early strength of the concrete structure may not be suitable, but also it is not economical.
Moreover, the large-v

Method used

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  • Maritime work concrete and construction method

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Effect test

Embodiment 1

[0038] A kind of marine concrete, which is a mixture composed of cement, blast furnace slag fine powder, fly ash, sand, gravel, admixture and water in proportion. The weight ratio of each component in the mixture is (unit: kg ):

[0039] Cement 202, blast furnace slag fine powder 217, fly ash 56, sand 695, gravel 1086, water 152, admixture 4.5.

[0040] The cement described in this embodiment is Portland cement, and its quality index meets the requirements of "Portland cement, ordinary Portland cement" GB175-1999, and its performance parameters are: density is 3.16g / cm3; specific surface area is 308m 2 / kg; the setting time is, the initial setting is 2:25h, the final setting is 3:15h, the flexural strength is: the 3d flexural strength is 5.8MPa, the 28d flexural strength is 9.3MPa, the compressive strength is, the 3d compressive strength is 26.9MPa, 28d compressive strength is 55.6MPa.

[0041] The blast furnace slag fine powder and fly ash are waste residues from iron and ...

Embodiment 2

[0046] A kind of marine concrete, which is a mixture composed of cement, blast furnace slag fine powder, fly ash, sand, gravel, admixture and water in proportion. The weight ratio of each component in the mixture is (unit: kg ):

[0047] Cement 218, blast furnace slag fine powder 201, fly ash 56, sand 695, gravel 1087, admixture 4.5, water 152.

[0048] The cement is Portland cement; the blast furnace slag fine powder and fly ash are waste residues from iron and steel plants, power plants, etc.; the sand is river sand with a fineness modulus of 2.6; the particle size of the gravel is 5-25mm, wherein the ratio of gravel with a particle size of 5-15mm to gravel with a particle size of 15-25mm is 2:8; the admixture is a polycarboxylate water reducer Rheoplus325, and its water-reducing rate is 28.9%, bleeding ratio 40.1%, air content 3.0%, initial setting time difference +98min, final setting time difference +113min; 1d compressive strength ratio 186%, 3d compressive strength rat...

Embodiment 3

[0050] A kind of marine concrete, which is a mixture composed of cement, blast furnace slag fine powder, fly ash, sand, gravel, admixture and water in proportion. The weight ratio of each component in the mixture is (unit: kg ):

[0051] Cement 218, blast furnace slag fine powder 196, fly ash 56, sand 694, gravel 1086, admixture 4.2, water 152.

[0052] The cement is Portland cement, the blast furnace slag fine powder and fly ash are waste residues from iron and steel plants, power plants, etc., the sand is river sand with a fineness modulus of 2.6, and the particle size of the crushed stone is 5-25 mm, wherein the ratio of crushed stones with a particle size of 5-15 mm to crushed stones with a particle size of 15-25 mm is 2:8, and the additive is polycarboxylate water reducer ADVA152.

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Abstract

The present invention discloses maritime-works concrete and a method for constructing the maritime-works concrete, which is mainly composed of cement, blast-furnace slag powder, fly ash, sand, crushed stone, additive and water, and has favorable durance, and can meet the requirements of the ocean large engineering project on the favorable durance of the concrete system, and can effectively avoid the corrosion of the steel bar during the service life, and can maintain the favorable appearance. The construction method of the maritime-works concrete comprises adopting the mixing factory-orientation production, the integrated material supply, the conveying pump and the tank cart to transport the concrete to the pouring site, and adopting the material rod to distribute the materials, thus can effectively control the feeding point, the feeding quantity and the feeding speed, and can guarantee the concrete to meet the working indexes required for the construction such as the uniformity and the stipulated collapsed degree while effectively improving the construction progress, and can promote the successful completion of the engineering project. The moisture-preservation and temperature-preservation maintenance is adopted for the initial maintenance of the beam body, thereby improving the initial strength, accelerating the turnover of the beam holder and the die, and reducing the beam-making cost.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a marine concrete and a construction method thereof. Background technique [0002] The durability of marine concrete structures is of paramount importance. Because the marine concrete structure is affected by various factors such as water quality, strong tide, typhoon, freezing and so on in the marine environment, the traditional ordinary concrete structure based on Portland cement is easily damaged and its durability is shortened. In recent years, many offshore durable buildings or structures have appeared abroad, such as the Fahd German sea embankment bridge between Saudi Arabia and Bahrain, the Akashi sea-crossing bridge in Japan, the Kadifu bay embankment project, and the Great Bear Strait project , Edmeler-Clay Bridge, etc. Most of these durable marine buildings or structures use durable marine concrete, that is, fly ash, slag, composite admixtures, silica fume and other ...

Claims

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Application Information

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IPC IPC(8): C04B28/00E01D21/00C04B18/14C04B18/08C04B14/06C04B14/02
CPCC04B2111/26C04B2111/2038C04B28/02Y02W30/91C04B14/04C04B14/06C04B18/08C04B18/141C04B20/0092C04B2103/302
Inventor 蔡以智李友明彭清福刘阳彭贵刚
Owner CHINA RAILWAY HI TECH IND CORP LTD
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