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Magnesium phosphate cement-based sulfate-resistant maritime work repairing and reinforcing material and preparation method thereof

A magnesium phosphate cement and sulfate-resistant technology, which is applied in the field of building materials, can solve the problems of low alkalinity, poor concrete cohesion, and poor wear resistance, and achieve the effects of high early strength, fast setting and hardening, and strong water resistance

Active Publication Date: 2021-08-31
HYDRAULIC SURVEY & DESIGN RES INST OF TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of existing repairing and reinforcing materials such as poor wear resistance, low alkalinity after setting and hardening, and poor adhesion with old concrete, the present invention provides a sulfuric acid-resistant marine repair and reinforcement using magnesium phosphate cement as a gelling agent. Materials and their preparation methods

Method used

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  • Magnesium phosphate cement-based sulfate-resistant maritime work repairing and reinforcing material and preparation method thereof
  • Magnesium phosphate cement-based sulfate-resistant maritime work repairing and reinforcing material and preparation method thereof
  • Magnesium phosphate cement-based sulfate-resistant maritime work repairing and reinforcing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A magnesium phosphate cement-based anti-sulfuric acid marine repair and reinforcement material, which is made of magnesium phosphate cement, quartz sand, polypropylene fiber and water:

[0029] Magnesium phosphate cement-based gelling agent powder is calculated by mass percentage: 80.0% overburned magnesium oxide, 6.0% limestone powder, and 14.0% metakaolin.

[0030] The massfraction of described overburned magnesium oxide powder is 92%, and the specific surface area of ​​overburned magnesium oxide powder ; The limestone powder, 0.063mm square hole sieve remaining 3%; The average particle size of the metakaolin is 1.5~2.5µm, the specific surface area .

[0031] Magnesium phosphate cement is calculated by mass percentage: magnesium phosphate cement-based gelling powder 63.0%, monoammonium phosphate 22%, composite retarder 11%, and sodium silicate 4%.

[0032] The main particle size of the monoammonium phosphate is 40 / 350~60 / 245 mesh / μm, and the composite retarder is ...

Embodiment 2

[0046] A magnesium phosphate cement-based anti-sulfuric acid marine repair and reinforcement material, which is made of magnesium phosphate cement, quartz sand, polypropylene fiber and water:

[0047] Among them, the magnesium phosphate cement-based gelling agent powder is calculated by mass percentage: 82.0% of overburned magnesium oxide, 5.0% of limestone powder, and 13.0% of metakaolin;

[0048] Magnesium phosphate cement is calculated by mass percentage: magnesium phosphate cement-based gelling powder 64.0%, monoammonium phosphate 21%, composite retarder 11%, sodium silicate 4%;

[0049] Magnesium phosphate cement-based sulfate-resistant repair and reinforcement materials are calculated by mass fraction: magnesium phosphate cement 55.0%, quartz sand 44.0%, polypropylene fiber 1.0%.

[0050] The preparation method and use method of the magnesium phosphate cement-based sulfate-resistant offshore repair reinforcement material in Example 2 are the same as those in Example 1. ...

Embodiment 3

[0055] A magnesium phosphate cement-based anti-sulfuric acid marine repair and reinforcement material, which is made of magnesium phosphate cement, quartz sand, polypropylene fiber and water:

[0056] Among them, the magnesium phosphate cement-based gelling agent powder is calculated by mass percentage: 80.0% of overburned magnesium oxide, 5.0% of limestone powder, and 15.0% of metakaolin;

[0057] Magnesium phosphate cement is calculated by mass percentage: magnesium phosphate cement-based gelling powder 65.0%, monoammonium phosphate 22%, composite retarder 10%, sodium silicate 3%;

[0058] Magnesium phosphate cement-based sulfate-resistant repair and reinforcement materials are calculated by mass fraction: magnesium phosphate cement 56.0%, quartz sand 43.2%, polypropylene fiber 0.8%.

[0059] The preparation method and use method of the magnesium phosphate cement-based sulfate-resistant marine repair reinforcement material in Example 3 are the same as in Example 1.

[0060]...

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Abstract

The invention belongs to the field of building materials, relates to a maritime work repairing and reinforcing material, and in particular, relates to a magnesium phosphate cement-based sulfate-resistant maritime work repairing and reinforcing material and a preparation method thereof. The material comprises the following components in percentage by mass: 53 to 60 wt% of magnesium phosphate cement, 39 to 46 wt% of quartz sand, and 0.8 to 1.5 wt% of polypropylene fiber. The magnesium phosphate cement comprises the components in percentage by mass: 62 to 67 wt% of magnesium phosphate cement-based gelling powder, 18 to 22 wt% of monoammonium phosphate, 10 to 13 wt% of a composite set retarder, and 2 to 4 wt% of sodium silicate. The magnesium phosphate cement-based gelling agent powder comprises the components in percentage by weight: 80 to 83 wt% of over-burnt magnesia powder, 5 to 7 wt% of limestone powder, and 10 to 15 wt% of metakaolin. The composite set retarder is composed of borax, disodium hydrogen phosphate dodecahydrate and organic acid. The material provided by the invention has the characteristics of strong sulfate corrosion resistance, fast setting and hardening, strong constructability, high early strength, strong wear resistance, good cohesiveness and the like, and has strong cohesiveness with an old concrete structure matrix.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a marine repair and reinforcement material, in particular to a magnesium phosphate cement-based sulfate-resistant marine repair and reinforcement material and a preparation method thereof. Background technique [0002] my country's coastal cities are rich in resources and have great development potential. The "14th Five-Year Plan" proposes to break through key areas such as marine engineering, marine resources, and marine environment to develop and build a modern marine industrial system in my country, including wharf construction, coastal roads, passenger and cargo The development of high-speed rail lines is very necessary. As the main material of marine engineering construction, concrete has been in a complex environment of multiple erosions such as dry-wet cycles, carbonation, freeze-thaw, and sulfate chloride for a long time, resulting in serious damage to the concrete material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B12/02C04B111/72C04B111/20
CPCC04B12/02C04B28/344C04B2111/2015C04B2111/72C04B2201/50C04B14/06C04B16/0633
Inventor 张洁刘良志朱平程林宋效第
Owner HYDRAULIC SURVEY & DESIGN RES INST OF TIANJIN UNIV
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