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Concrete reinforcement corrosion inhibitor and preparation method thereof

A technology of concrete reinforcing bar and rust inhibitor, which is applied in the field of anti-corrosion of building materials, can solve the problems of little anti-rust effect and low anti-corrosion performance, and achieve the effects of compensating for compactness, slowing down erosion and ensuring stability.

Inactive Publication Date: 2017-11-21
王建东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the rust inhibitors currently used in the market, when steel bars are corroded by chloride ions, and when the initial concentration of chloride ions is higher than 0.43% of the cement mass fraction, the rust inhibition effect is negligible and its anticorrosion performance is greatly reduced. The invention provides a concrete steel bar rust inhibitor and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Add phosphogypsum into the muffle furnace, heat to 650°C, keep it warm for 30 minutes, cool to room temperature, put it into a ball mill and mill it for 20 minutes, pass through a 100-mesh sieve to obtain modified phosphogypsum, add fly ash into the muffle furnace, Heat to 700°C, keep warm for 30 minutes, cool to room temperature, put it into a ball mill and mill for 1 hour, and pass through a 100-mesh sieve to obtain activated fly ash. Take 50g of modified phosphogypsum, 40g of activated fly ash, and 5g of bauxite. Enter the ball mill and ball mill until the specific surface area is 300m 2 / g, to obtain a composite powder, add 10mL deionized water to the composite powder, stir at 100r / min for 15min, then transfer to a drying oven, dry to constant weight at 105°C and put it into a muffle furnace, at 300 Calcined at ℃ for 30min, cooled to room temperature, put into a ball mill, and passed through a 200 mesh sieve to obtain prehydration activated clinker. Take 40g prehydr...

example 2

[0028] Put the phosphogypsum into the muffle furnace, heat it to 680°C, keep it warm for 35 minutes, cool it down to room temperature, put it into a ball mill and mill it for 25 minutes, pass through a 100-mesh sieve to get modified phosphogypsum, add the fly ash into the muffle furnace, Heat to 750°C, keep warm for 35 minutes, cool to room temperature, put it into a ball mill and mill for 1.5 hours, and pass through a 100-mesh sieve to obtain activated fly ash. Take 55g of modified phosphogypsum, 45g of activated fly ash, and 5.5g of bauxite , put into a ball mill and ball mill until the specific surface area is 350m 2 / g, to obtain a composite powder, add 15mL deionized water to the composite powder, stir at 120r / min for 20min, then transfer to a drying oven, dry to constant weight at 108°C and put it into a muffle furnace, at 350 Calcined at ℃ for 35 minutes, cooled to room temperature, put into a ball mill and passed through a 200-mesh sieve to obtain prehydration activate...

example 3

[0030] Add phosphogypsum into the muffle furnace, heat to 700°C, keep it warm for 40 minutes, cool to room temperature, put it into a ball mill and mill it for 30 minutes, pass through a 100-mesh sieve to obtain modified phosphogypsum, add fly ash into the muffle furnace, Heat to 800°C, keep warm for 40 minutes, cool to room temperature, put it into a ball mill and mill for 2 hours, and pass through a 100-mesh sieve to obtain activated fly ash. Take 60g of modified phosphogypsum, 50g of activated fly ash, and 6g of bauxite. Put into the ball mill and ball mill until the specific surface area is 400m 2 / g, to obtain a composite powder, add 20mL deionized water to the composite powder, stir at 150r / min for 30min, then transfer to a drying oven, dry at 110°C to constant weight and put it into a muffle furnace, at 400 Calcined at ℃ for 40min, cooled to room temperature, put into a ball mill for ball milling, passed through a 200 mesh sieve to obtain prehydration activated clinker, ...

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Abstract

The invention belongs to the technical field of corrosion resistance of building materials and relates to a concrete reinforcement corrosion inhibitor and a preparation method thereof. Coal ash with pozzolanic activity is adopted for generating ettringite under the stimulation action of Ca(OH)2 to provide early-stage compactness of concrete; after complete reaction of ettringite, hydration of residual free CaO in the coal ash and CaO in an additional calcium source continues so as to realize concrete volume compactness to provide later-stage compactness of concrete, concrete volume continuous and uniform compactness can be realized, early-stage and later-stage compactness of concrete can be compensated, reinforcing steel bar erosion caused by chloride ions can be retarded, and concrete structural stability is guaranteed; by electronegativity of aromatic groups, chloride ions and the like are prevented from migrating from reinforcing steel bar bases to retard steel bar erosion caused by chloride ions; by compounding of propolis with polyhydroxy structural groups, repellence among molecules can be reduced while compactness and stability of an adsorption film are improved owing to the characteristic that hydrogen bonds can be formed among hydroxyl radicals.

Description

technical field [0001] The invention relates to a concrete steel bar rust inhibitor and a preparation method thereof, belonging to the technical field of anticorrosion of building materials. Background technique [0002] Reinforced concrete is an economical, applicable and durable man-made composite material that has long been and will be widely used in various construction projects in the foreseeable future. However, during the construction, use, and service of reinforced concrete structures, some problems have gradually been exposed, among which the durability of reinforced concrete has become increasingly prominent and has become a worldwide problem. [0003] The premature failure of reinforced concrete materials in the marine environment is becoming more and more common and serious, and it is far from reaching the design service life. Moreover, after these facilities are damaged, a large amount of manpower, material resources, and financial resources are required to rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/61
CPCC04B40/0039C04B2103/61C04B2201/50C04B22/144C04B18/08C04B14/303C04B14/28C04B24/122
Inventor 袁松王之霖
Owner 王建东
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