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Seawater-resistant reinforced concrete admixture and preparation method thereof

A technology for strengthening concrete and admixtures, applied in the field of building materials, can solve problems such as undocumented, and achieve the effects of reducing acidity, increasing flexural strength and compressive strength, and improving workability

Active Publication Date: 2020-06-26
深圳市中兆荣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types and varieties of concrete admixtures in China, but there are no records of anti-corrosion admixtures for concrete structure engineering in salt lake areas and saline soil areas.

Method used

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  • Seawater-resistant reinforced concrete admixture and preparation method thereof

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preparation example Construction

[0022] The preparation method of anti-seawater reinforced concrete admixture is characterized in that, comprises the following steps:

[0023] (1) Bleached broad-leaved wood chemical pulp is used as raw material, sent to a refiner for beating and grinding, and the pulp suspension is treated by disc milling. In the swelling pretreatment stage, a large disc milling gap of 0.8-1.0 mm is used to ensure swelling The agent and the fiber are fully mixed, and the swelling is completed within 5-8 minutes; then gradually adjust the disc grinding gap to 0.1-0.05mm, and repeatedly perform beating treatment. Liquid delivery high-pressure homogenizer, cycled 10-15 times under the condition of 40-60MPa, after freeze-drying, under the condition of Ar gas, 80, 120, 250°C gradient temperature carbonization, to obtain carbonized microfibrillated cellulose;

[0024] (2) 70-80 parts by mass of β-naphthalenesulfonate sodium formaldehyde condensation polymer, 5-10 parts by mass of chitosan, 4-7 part...

Embodiment 1

[0027] A seawater-resistant reinforced concrete admixture, comprising the following raw materials in parts by mass: 75 parts by mass of sodium β-naphthalenesulfonate formaldehyde condensation polymer, 8 parts by mass of chitosan, 5 parts by mass of calcium silicate, and 5 parts by mass of silane coupling agent Parts, 1.5 parts by mass of polyvinylpyrrolidone, 1.5 parts by mass of chromium lactate, 4 parts by mass of carbonized microfibrillated fiber, 2 parts by mass of rosin thermopolymer, 2 parts by mass of zirconia fiber; the carbonized microfibrillated fiber is microfibrillated The product of high-temperature anaerobic carbonization of plant fibers.

[0028] The weight ratio of chitosan, carbonized microfibrillated fiber, rosin thermal polymer and zirconia fiber is 4:2:1:1.

[0029] The average diameter of the zirconia fibers is 5-15um.

[0030] Carbonized microfibrillated fibers have an average diameter of 5-20 nm.

[0031] The preparation method of anti-seawater reinfor...

Embodiment 2

[0035]A seawater-resistant reinforced concrete admixture, comprising the following raw materials in parts by mass: 70 parts by mass of sodium β-naphthalenesulfonate formaldehyde condensation polymer, 5 parts by mass of chitosan, 7 parts by mass of calcium silicate, and 2 parts by mass of silane coupling agent Parts, 2 parts by mass of polyvinylpyrrolidone, 1 part by mass of chromium lactate, 5 parts by mass of carbonized microfibrillated fiber, 1 part by mass of rosin thermal polymer, 3 parts by mass of zirconia fiber; the carbonized microfibrillated fiber is microfibrillated The product of high-temperature anaerobic carbonization of plant fibers.

[0036] The average diameter of the zirconia fibers is 5-15um.

[0037] Carbonized microfibrillated fibers have an average diameter of 5-20 nm.

[0038] The preparation method of anti-seawater reinforced concrete admixture is characterized in that, comprises the following steps:

[0039] (1) Bleached broad-leaved wood chemical pul...

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Abstract

The invention discloses a seawater-resistant reinforced concrete admixture and a preparation method thereof. The seawater-resistant reinforced concrete admixture is characterized by comprising the following raw materials by mass: 70-80 parts of beta-sodium naphthalene sulfonate formaldehyde polycondensate, 5-10 parts of chitosan, 4-7 parts of calcium silicate, 2-8 parts of a silane coupling agent,1-2 parts of polyvinylpyrrolidone, 1-2 parts of chromium lactate, 3-5 parts of carbonized microfibrillated fiber, 1-3 parts of a rosin thermal polymer and 1-3 parts of zirconium oxide fiber; whereinthe carbonized microfibrillated fiber is a product of high-temperature anaerobic carbonization of microfibrillated plant fiber. The seawater-resistant reinforced concrete admixture provided by the invention further improves the flexural strength and compressive strength of concrete in a high-salinity environment.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a seawater-resistant reinforced concrete admixture and a preparation method thereof. Background technique [0002] The total length of China's coastline is 32,000 kilometers, including 18,000 kilometers of mainland coastline and 14,000 kilometers of island coastline. There are many harbors and dotted with coastal cities. A large amount of goods trade is shipped out by sea. The throughput of ports is increasing year by year. Simultaneously, the construction of seawalls and seaports has also increased rapidly, but as far as the cement produced in my country is used for roads and buildings, it is directly used in places where seawater is soaked. Because it is not resistant to seawater and chloride ion erosion, concrete The strength and service life will be greatly reduced. [0003] Concrete is the most widely used building material in modern times. It has the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/38C04B24/34C04B24/06C04B14/38C04B14/46
CPCC04B40/0039C04B14/386C04B24/226C04B24/38C04B22/00C04B24/42C04B24/2652C04B24/06C04B24/34C04B14/4637
Inventor 黄佑文
Owner 深圳市中兆荣新材料有限公司