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High-performance concrete suitable for high-temperature areas

A high-performance concrete, regional technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of ordinary concrete mechanics and durability degradation, difficulty in maintaining the strength of concrete structure, affecting compressive strength, etc. , to achieve the effect of improving freeze-thaw resistance, improving fluidity and compactness, and reducing cement consumption

Pending Publication Date: 2022-01-28
JIANGSU DONGZHAO CONSTR IND INNOVATION & DEV RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of technology, engineering structures are developing in a deeper and longer-term direction, which puts forward higher requirements for the strength of concrete. At present, the special structural parts of some industrial buildings need to serve in high-temperature environments for a long time. The flue retaining wall and slag outlet of the thermal plant, the slag pool of the iron and steel plant, the basic structure of the electric furnace, etc., due to long-term work in a high-temperature environment, the mechanical properties and durability of ordinary concrete are seriously deteriorated after being subjected to high temperature, and the aggregate in the concrete will be damaged. Expansion and deformation will affect its compressive strength, and at the same time, the cement paste will evaporate with water, making it difficult to maintain the strength of the concrete structure

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a kind of high-performance concrete suitable for high-temperature areas, comprising: 100 parts of cement; 150 parts of modified metakaolin; 150 parts of clay clinker; 80 parts of coal ash powder; 130 parts of sand; 70 parts of glass; 20 parts of sodium silicate; 30 parts of asphalt; 15 parts of functional additives; water: 220 parts;

[0031] Portland cement with cement strength grade 52.5 and above;

[0032] Fly ash is a mixture of Class II fly ash and Class I fly ash at a mass ratio of 1:1, and the compressive strength of fly ash is 1.5MPaMPa;

[0033] The sand is uniformly mixed with silica sand, river sand and desalinated sea sand at a weight ratio of 1:1:0.6, and its particle size is 500 μm, 700 μm, and 900 μm respectively, and the content of silicon dioxide in the silica sand is ≥98%;

[0034] Functional additives include 10 parts of polycarboxylate superplasticizer, 5 parts of phosphoric acid-based retarder, 7 parts of admixture, 20 part...

Embodiment 2

[0038] This embodiment provides a high-performance concrete suitable for high-temperature areas, including: 200 parts of cement; 190 parts of modified metakaolin; 220 parts of clay clinker; 80-190 parts of coal ash powder; 100 parts of sand 60 parts of water glass; 40 parts of sodium silicate; 40 parts of asphalt; 20 parts of functional additives; water: 300 parts;

[0039] Portland cement with cement strength grade 52.5 and above;

[0040] Fly ash is a mixture of Class II fly ash and Class I fly ash at a mass ratio of 1:1, and the compressive strength of fly ash is 1.5MPaMPa;

[0041] The sand is uniformly mixed with silica sand, river sand and desalinated sea sand at a weight ratio of 1:1:0.6, and its particle size is 300 μm, 500 μm, and 700 μm respectively, and the content of silicon dioxide in the silica sand is ≥98%;

[0042] Functional additives include 15 parts of polycarboxylate superplasticizer, 8 parts of phosphoric acid-based retarder, 10 parts of admixture, 25 par...

Embodiment 3

[0046] This embodiment provides a kind of high-performance concrete suitable for high temperature areas, including: 100-280 parts of cement; 150-230 parts of modified metakaolin; 150-260 parts of clay clinker; 80-260 parts of coal ash powder 190 parts; sand 100-150 parts; water glass 50-100 parts; sodium silicate 15-50 parts; asphalt 30-80 parts; functional additives 15-25 parts; water: 200-400 parts.

[0047] Portland cement with cement strength grade 52.5 and above;

[0048] Fly ash is a mixture of Class II fly ash and Class I fly ash at a mass ratio of 1:1, and the compressive strength of fly ash is 1.5MPaMPa;

[0049]The sand is uniformly mixed with silica sand, river sand and desalinated sea sand at a weight ratio of 1:1:0.6, and its particle size is 400 μm, 600 μm, and 800 μm respectively, and the content of silicon dioxide in the silica sand is ≥98%;

[0050] Functional additives include 22 parts of polycarboxylate superplasticizer, 10 parts of phosphoric acid-based re...

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Abstract

The invention relates to high-performance concrete suitable for a high-temperature area. The high-performance concrete comprises the following components in parts by mass: 100-280 parts of cement; 150 to 230 parts of modified metakaolin; 150 to 260 parts of clay clinker; 80-190 parts of coal ash powder; 100 to 150 parts of sand; 50 to 100 parts of water glass; 15 to 50 parts of sodium silicate; 30 to 80 parts of asphalt; 15 to 25 parts of a functional additive; 200 to 400 parts of water; according to the invention, various mechanical properties and high temperature resistance of the concrete are improved, and the freeze-thaw resistance of the concrete is effectively improved.

Description

technical field [0001] The invention relates to the technical field of building materials in civil engineering, in particular to a high-performance concrete suitable for high-temperature regions. Background technique [0002] With the development of technology, engineering structures are developing in a deeper and longer-term direction, which puts forward higher requirements for the strength of concrete. At present, the special structural parts of some industrial buildings need to serve in high-temperature environments for a long time. The flue retaining wall and slag outlet of the thermal plant, the slag pool of the iron and steel plant, the basic structure of the electric furnace, etc., due to long-term work in a high-temperature environment, the mechanical properties and durability of ordinary concrete are seriously deteriorated after being subjected to high temperature, and the aggregate in the concrete will be damaged. Expansion and deformation will affect its compressi...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B14/06C04B14/10C04B14/42C04B14/46C04B14/48C04B16/06C04B18/08C04B18/12C04B24/36C04B24/24C04B22/16C04B103/30C04B103/22
CPCC04B28/26C04B14/106C04B18/08C04B14/06C04B14/068C04B24/36C04B18/12C04B14/48C04B14/42C04B16/0633C04B14/4643C04B24/24C04B22/16C04B2103/302C04B2103/22C04B2201/50C04B7/02C04B14/10C04B14/386C04B24/302C04B24/28Y02W30/91
Inventor 孙峰慕金伯王玺李振娜
Owner JIANGSU DONGZHAO CONSTR IND INNOVATION & DEV RES INST CO LTD
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