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Marine concrete corrosion resistant additive and preparation thereof

A marine concrete and corrosion-resistant technology, applied in the field of building materials, can solve problems such as difficult design ideas, complex and diverse raw materials, increased quality control, etc., to improve corrosion resistance such as sulfate, improve impermeability and anti-corrosion Chemical aggressiveness, compensating effect of late shrinkage

Inactive Publication Date: 2009-06-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the multi-component concrete mix design idea including various active mineral admixtures and several admixtures is difficult to implement in actual projects, and the complexity and diversity of raw materials increase the difficulty of on-site mixing or centralized mixing. Practical difficulties in raw material storage, quality control, weighing and mixing, quality control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Calcium sulfoaluminate expansion agent 10%

[0052] Sodium methyl naphthalene sulfonate superplasticizer 0.5%

[0053] Air-entraining agent 0.01%

[0054] Silicone powder 0.5%

[0055] Neopentyl Glycol 0.8%

[0056] Polypropylene fiber 0.5%

[0057] Finely ground slag powder 20%

[0058] Silica fume 30%

[0059] Ultrafine fly ash 25%

[0060] Quartz sand 12.69%

[0061] The marine concrete corrosion-resistant admixture prepared by the above proportion is mixed into the C40 marine concrete according to 10% of the cement mass in the marine concrete. The 28-day electric flux of the marine concrete is less than 1000C, and the 28-day compressive strength is increased by 10% compared with the reference concrete.

Embodiment 2

[0063] Calcium sulfoaluminate expansion agent 25%

[0064] Sodium methyl naphthalene sulfonate superplasticizer 1%

[0065] Air-entraining agent 0.05%

[0066] Silicone powder 0.5%

[0067] Neopentyl Glycol 0.2%

[0068] Polypropylene fiber 0.3%

[0069] Ground slag powder 20.5%

[0070] Silica fume 25%

[0071] Superfine fly ash 20%

[0072] Quartz sand 7.45%

[0073] The marine concrete corrosion-resistant admixture prepared in the above proportion is mixed into the C40 marine concrete according to 10% of the amount of cementitious material in the marine concrete. The 28-day electric flux of the marine concrete is less than 900C, and the 28-day compressive strength is 15% higher than that of the reference concrete.

Embodiment 3

[0075] Calcium sulfoaluminate expansion agent 10%

[0076] Sodium methyl naphthalene sulfonate superplasticizer 1%

[0077] Air-entraining agent 0.01%

[0078] Silicone powder 0.5%

[0079] Neopentyl Glycol 0.5%

[0080] Polypropylene fiber 0.3%

[0081] Ground slag powder 25%

[0082] Silica fume 40%

[0083] Ultrafine fly ash 10%

[0084] Quartz sand 12.69%

[0085] The marine concrete corrosion-resistant admixture prepared in the above proportion is mixed into the C40 marine concrete according to 10% of the amount of cementitious material in the marine concrete. The 28-day electric flux of the marine concrete is less than 900C, and the 28-day compressive strength is 18% higher than that of the reference concrete.

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Abstract

The invention relates to the technical field of building material, in particular to a maritime work concrete corrosion-proof additive. The maritime work concrete corrosion-proof additive consists of a calcium sulphoaluminate expansion agent, a methyl naphthalene sulphonic acid water reducing agent, organosilicon hydrophobic powder, neopentylene glycol, milled slag powder, polypropylene fibers, silicon ash, superfine fly ash and arenaceous quartz. The maritime work concrete corrosion-proof additive can reduce the water consumption for mixing concrete, improve the water retention and cohesiveness, and improve the resistance of the concrete to seawater erosion and the durability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a corrosion-resistant admixture for marine concrete and a preparation method thereof. Background technique [0002] Concrete used in marine engineering (marine concrete), also known as marine concrete. Marine engineering includes coastal engineering (such as commercial ports, fishing ports, military ports, sea estuary regulation, tidal gates, industrial water diversion, sea-crossing bridges, coastal protection, tidal power stations, etc.) and offshore engineering (also known as offshore engineering, such as large deep water Marine concrete is used for structures constructed under the influence of seawater (such as inland ports and bridges near estuaries) and structures that are often on the shore but often splashed by waves. Due to the frequent or periodic contact with seawater, the marine concrete is damaged by the physical and chemical effects of seawater or marine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/20C04B22/14C04B24/04C04B18/12C04B18/08C04B14/06C04B111/24
CPCC04B2103/46C04B40/0046C04B2103/61C04B2103/302C04B2111/24Y02W30/91C04B14/06C04B16/06C04B18/088C04B18/141C04B18/146C04B20/026C04B22/008C04B24/02C04B24/20C04B24/42C04B28/02C04B2103/304C04B7/323C04B16/0633
Inventor 蒋正武
Owner TONGJI UNIV
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