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Bare concrete binding material and corrosion-resistant bare concrete utilizing same

A technology of fair-faced concrete and cementitious materials, which is applied in cement production and other directions, can solve the problems of concrete structure being corroded by chloride ions, affecting the service life of concrete structure, and large structure section size, so as to improve the resistance to chloride ion penetration and chlorine resistance Good ion permeability and the effect of improving crack resistance

Inactive Publication Date: 2013-04-03
CCCC FOURTH HARBOR ENG INST +3
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The environment of cross-sea bridges is generally harsh, and the concrete structure is severely eroded by chloride ions. At the same time, due to the large cross-sectional size of the structure, the heat of hydration can easily lead to cracks, which seriously affects the service life of the concrete structure.

Method used

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  • Bare concrete binding material and corrosion-resistant bare concrete utilizing same
  • Bare concrete binding material and corrosion-resistant bare concrete utilizing same

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0015] The anti-corrosion fair-faced concrete mix example of the present invention is shown in Table 1.

[0016] Table 1

[0017]

[0018] The water reducer is preferably HSP-V polycarboxylate water reducer from Sihang Material Company.

[0019] The slump of the concrete mixture prepared in the above three examples is 180~185mm, the air content is 3.0~3.2%, the color of the hardened concrete is off-white, the color is uniform, and there is no obvious color difference. Concrete mixture refers to the plastic state mixture that has not yet set and hardened when the various components of concrete are mixed in a certain proportion, also known as fresh concrete. The working properties, mechanical properties and durability of the above three examples of concrete are shown in Table 2.

[0020] Table 2

[0021]

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PUM

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Abstract

The invention discloses a bare concrete binding material. The bare concrete binding material is prepared by mixing 30-50% of cement, 15-25% of coal ash, 25-35% of slag powder and 10-20% of limestone flour according to weight percentage. According to the bare concrete binding material and the corrosion-resistant bare concrete utilizing the same, through the blending of the limestone flour, the cement can be saved, and the production cost of the concrete can be lowered; due to the blended limestone flour, the hydration heat of the concrete can be decreased, and the anti-cracking capability of the concrete can be improved; and through the blending of two active blending stocks including the coal ash and the slag powder, the chloride penetration resistance of the concrete is improved, and the service life of the structure is prolonged.

Description

technical field [0001] The invention relates to a clear-water concrete used for large-volume buildings or structures in a marine strong corrosion environment, in particular to a corrosion-resistant clear-water concrete mixed with limestone powder, which has low heat of hydration, high resistance to chloride ion penetration, and can To achieve the effect of fair-faced concrete. Background technique [0002] In recent years, a large number of large bridges across seas and rivers have been built in China. The environment of cross-sea bridges is generally relatively harsh, and the concrete structure is severely eroded by chloride ions. At the same time, due to the large cross-sectional size of the structure, the heat of hydration can easily cause cracks, which seriously affects the service life of the concrete structure. [0003] With the rapid development of construction technology, on the basis of satisfying safety and durability, people have put forward higher requirements f...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/14C04B28/08
CPCY02P40/10
Inventor 王胜年邓春林熊建波李士伟刘行王明军
Owner CCCC FOURTH HARBOR ENG INST
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