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Desalting sea sand high-performance concreet mixing materials and preparing method thereof

A high-performance concrete and mixture technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problem of poor utilization and development of sea sand, shortage of natural river sand and mountain sand supply, Occupy large farmland and other problems, to achieve the effect of reducing mining, reducing energy consumption and pollution, and good construction performance

Inactive Publication Date: 2005-02-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the needs of environmental protection and sustainable development, the mining of natural sand and gravel will be more and more restricted, which will lead to an increasingly tight supply of natural river sand and mountain sand, and the price will rise significantly; while sea sand with huge reserves has not been well developed. use and develop
[0003] In addition, as a kind of industrial waste, fly ash and slag not only pollute the environment, but also occupy a lot of fertile land for stacking and disposal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The proportion of each component of the C60 fly ash desalinated sea sand high-performance concrete mixture is as follows:

[0038] 42.5 grade cement: 413kg

[0039] Class II fly ash: 73kg

[0040] Desalinated sea sand: 738kg

[0041] Stone (5-25mm): 1019kg

[0042] Water: 175kg

[0043] Water reducer: 11.8kg

[0044] The material prepared according to the above ratio has the following properties:

[0045] Concrete mixture slump: 220mm; 28d compressive strength: 65.9MPa; chloride ion permeability: very low.

Embodiment 2

[0047] The proportion of each component of C80 fine slag desalination sea sand high-performance concrete mixture is as follows:

[0048] 42.5 grade cement: 385kg

[0049] Ground slag powder: 165kg

[0050] Desalinated sea sand: 718kg

[0051] Stone (5-20mm): 1078kg

[0052] Water: 143kg

[0053] Water reducer: 11kg

[0054] The material prepared according to the above ratio has the following properties:

[0055] Concrete mixture slump: 250mm; 28d compressive strength: 94MPa; chloride ion permeability: very low.

Embodiment 3

[0057] The proportion of each component of the C80 fly ash and ground slag double mixed desalinated sea sand high-performance concrete mixture is as follows:

[0058] 42.5 grade cement: 371kg

[0059] Class I fly ash: 62kg

[0060] Finely ground slag powder: 138kg

[0061] Desalinated sea sand: 660kg

[0062] Stone (5-20mm): 1076kg

[0063] Water: 143kg

[0064] Water reducer: 11.4kg

[0065] The material prepared according to the above ratio has the following properties:

[0066] Concrete mixture slump: 220mm; 28d compressive strength: 95.6MPa; chloride ion permeability: very low.

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Abstract

The invention is about a preparation method and high per formance mixture of cement. The desalting sea sand is the main material, and others are cement, flyash, grinded fine coal powder and water. The mixture has high strength, good service behavior and good durability. It is ideal bearing cement for ecotype structure. And it can be applied in building structure, marine structure and hydro-structure.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and specifically relates to a C60- C80 high-performance concrete materials and preparation methods. Background technique [0002] Due to the needs of environmental protection and sustainable development, the mining of natural sand and gravel will be more and more restricted, which will lead to an increasingly tight supply of natural river sand and mountain sand, and the price will rise significantly; while sea sand with huge reserves has not been well developed. use and develop. [0003] In addition, as a kind of industrial waste, fly ash and slag not only pollute the environment, but also take up a lot of fertile land for stacking and disposal. [0004] The invention of high-performance concrete for load-bearing structures, which takes sea sand after strict desalination as fine aggregate and industrial waste (fly ash and finely ground slag powder), can make large use of sea sand wit...

Claims

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Application Information

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IPC IPC(8): C04B14/06C04B18/08C04B18/12C04B28/00
CPCY02W30/91
Inventor 肖建庄孙振平
Owner TONGJI UNIV
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