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Aluminophosphate-based marine cementitious material

A technology of aluminophosphate cement and auxiliary cementitious material is applied in the field of aluminophosphate cement-based marine cementitious materials, which can solve the problems of slow hydration speed, affecting cement durability, poor permeability and the like

Active Publication Date: 2020-10-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved: the marine cement based on Portland cement has a slow early hydration rate, low strength, and a large amount of Ca(OH) in the hydration product 2 , the hydration product of sulfoaluminate cement binder still contains Ca(OH) 2 , anti-Cl - and SO 4 2- Poor permeability, easy shrinkage and cracking, poor impermeability and corrosion resistance seriously affect the durability of cement

Method used

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  • Aluminophosphate-based marine cementitious material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] A cementitious material suitable for marine engineering, made according to the following weight percentages:

[0021] components High iron aluminophosphate cement clinker auxiliary gel material early strength agent Mass percentage (%) 40 58 2

[0022] Among them, the auxiliary gel material is composed of gold sand tailings, scheelite tailings, high-silicon phosphorus tailings powder, metakaolin, and bauxite tailings in a weight ratio of 3-5:1.5-1:1:1:1 .

Embodiment 2

[0024] A cementitious material suitable for marine engineering, made according to the following weight percentages:

[0025] components High iron aluminophosphate cement clinker auxiliary gel material early strength agent Mass percentage (%) 42 55 3

[0026] Among them, the auxiliary gel material is composed of gold sand tailings, scheelite tailings, high-silicon phosphorus tailings powder, metakaolin, and bauxite tailings in a weight ratio of 3-5:1.5-1:1:1:1 . Example 3

Embodiment 3

[0027] A cementitious material suitable for marine engineering, made according to the following weight percentages:

[0028] components High iron aluminophosphate cement clinker auxiliary gel material early strength agent Mass percentage (%) 45 50 5

[0029] Among them, the auxiliary gel material is composed of gold sand tailings, scheelite tailings, high-silicon phosphorus tailings powder, metakaolin, and bauxite tailings in a weight ratio of 3-5:1.5-1:1:1:1 .

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Abstract

The invention discloses an aluminophosphate based marine binding material. The binding material consists of 40% to 45% of high-iron phosphoaluminate cement clinker, 50% to 58% of an auxiliary bindingmaterial and 1% to 5% of an early strength agent, wherein the auxiliary binding material consists of the following components in parts by weight: 3 to 5 parts of sold sand tailings, 1.5 to 1 part of scheelite tailings, 1 part of high silicon phosphorus tailings powder, 1 part of metakaolin and 1 part of monohydrallite tailings. The marine binding material is relatively high in chloride penetrationresistance, volume stability and resistance to sulfate attack, and can meet the requirement of ocean engineering.

Description

technical field [0001] The invention discloses a high-performance cement-based cementitious material suitable for ocean engineering, in particular to an aluminophosphate cement-based marine cementitious material. Background technique [0002] SO contained in seawater 4 2- , Cl - , Mg 2+ The chemical corrosion caused by aggressive ions, physical damage caused by tides, hurricanes, ice, ocean currents, wave erosion, and sediment migration all have a serious impact on the durability of concrete. Therefore, in addition to the strength and workability required by ordinary engineering, the cement used in marine engineering must also have certain properties such as impermeability, frost resistance, corrosion resistance, and ice impact resistance. With the large-scale construction of offshore projects in our country, it is of great significance to improve the durability of concrete. The existing technology mainly uses marine portland cement as the matrix to meet the needs of ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B12/02
CPCC04B12/027
Inventor 王守德张淑欣张文龙程新芦令超
Owner UNIV OF JINAN