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Salt-fixing agent for seawater coral aggregate concrete

A technology of concrete and coral, which is applied in the fields of civil engineering and marine engineering materials, can solve problems such as poor durability, long-term strength shrinkage, surface salt and cracking, etc., and achieve the effects of improving mechanics, reducing diffusion rate, and improving durability

Active Publication Date: 2017-02-15
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a salt-fixing agent for seawater coral aggregate concrete, which can overcome the poor durability of existing seawater coral aggregate concrete such as long-term strength shrinkage, surface salting and cracking. shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment, the salt-fixing agent is composed of the following raw materials in proportion by weight:

[0055] 18% of micro-silica powder, 2% of nano-silica powder, 18% of high fineness, low crystallinity, high aluminum content, 62% of fineness, high aluminum content;

[0056] The specific surface area of ​​the micro silica fume is 20000m 2 / kg, SiO 2 Content 95%;

[0057] The specific surface area of ​​the nano silica powder is 180000m 2 / kg, SiO 2 Content 99.9%;

[0058] The specific surface area of ​​the high aluminum-containing territory is 13000m 2 / kg, Al 2 o 3 Content 45%, crystallinity 27%;

[0059] The specific surface area of ​​the aluminum-containing ore powder is 245m 2 / kg, Al 2 o 3 Content 22%.

[0060] In this embodiment, the above-mentioned salt-fixing agent can be mixed into the seawater coral aggregate concrete.

[0061] Preferably, in a specific embodiment of the present invention, the proportioning ratio of the seawater coral agg...

Embodiment 2

[0066] In this embodiment, the composition of the salt-fixing agent is the same as that in Embodiment 1.

[0067] In this embodiment, the above-mentioned salt-fixing agent can also be mixed into the seawater coral aggregate concrete.

[0068] Preferably, in a specific embodiment of the present invention, the proportioning ratio of the seawater coral aggregate concrete mixed with the above-mentioned salt-fixing agent is: P.O4 2.5 cement 350kg, salt-fixing agent 150kg, seawater 153kg, coral stones 1067kg, Coral sand 430kg, admixture 4.2kg; Among them, the particle size of coral stones is 0-31.5mm; the particle size of coral sand is 0-20mm.

[0069] After 30% of the salt agent is mixed into the cementitious material, the compressive strength of the seawater coral aggregate concrete within 28 days of age continues to increase under the actual environment of my country's N007 marine engineering, and there is no phenomenon of alkali return, skin bursting, cracking and peeling on the...

Embodiment 3

[0071] In this embodiment, the salt-fixing agent is composed of the following raw materials in proportion by weight:

[0072] 25% of micro-silica powder, 1.5% of nano-silica powder, 15% of high fineness, low crystallinity, high aluminum content, 58.5% of fineness, high aluminum content;

[0073] The specific surface area of ​​the micro silica fume is 20000m 2 / kg, SiO 2 Content 95%;

[0074] The specific surface area of ​​the nano silica powder is 180000m 2 / kg, SiO 2 Content 99.9%;

[0075] The specific surface area of ​​the high aluminum-containing territory is 13000m 2 / kg, Al 2 o 3 Content 45%, crystallinity 27%;

[0076] The specific surface area of ​​the aluminum-containing ore powder is 245m 2 / kg, Al 2 o 3 Content 22%.

[0077] In this embodiment, the above-mentioned salt-fixing agent can be mixed into the seawater coral aggregate concrete.

[0078] Preferably, in a specific embodiment of the present invention, the proportioning ratio of the seawater coral a...

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Abstract

The invention provides a salt-fixing agent for seawater coral aggregate concrete. The salt-fixing agent is composed of the following raw materials in percentage by weight: 15%-25% of micro-silicon powder, 1.5%-3% of nano silicon dioxide powder, 12%-24% of metakaolin, and 50%-64% of mineral powder. By use of the salt-fixing agent, the defects of the existing seawater coral aggregate concrete such as poor durability including long-term strength decreasing and surface salinized cracking are conquered.

Description

technical field [0001] The invention relates to the technical field of civil engineering and marine engineering materials, in particular to a salt-fixing agent for seawater coral aggregate concrete. Background technique [0002] In the civil engineering construction of far-sea islands and reefs far away from the mainland, such as the reclamation project of China's far-sea islands and reefs, a large number of concrete hydraulic revetments are required, including wave retaining walls, molded bag concrete, twisted I-shaped / twisted king-shaped wave-absorbing blocks Wait. These concrete hydraulic revetments will serve for a long time in high sea salt, seawater immersion / scouring / splashing environments; in addition, the raw materials of these concrete hydraulic revetment projects need to be transported in large quantities and long distances to remote islands and reefs, which consumes manpower and machinery. Huge, loading and unloading at the wharf is cumbersome and time-consuming...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/12
CPCC04B28/04C04B40/0042C04B2111/24C04B14/062C04B14/06C04B14/10C04B18/12C04B2103/60C04B14/28C04B24/24Y02W30/91
Inventor 韩宇栋郝挺宇王建平岳清瑞紫民樊继永苏波侯兆新张宏波郭东严建华
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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