Novel heat accumulation concrete for solar thermal power station and preparation method for novel heat accumulation concrete

A solar thermal and concrete technology, applied in the field of building materials, can solve the problems of low thermal conductivity of concrete, unstable concrete, and low thermal stability, and achieve the effects of good mechanical properties and stability, improved thermal properties, and easy operation.

Inactive Publication Date: 2014-07-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a material with high water content, complex components and low thermal stability, concrete still has many key technical problems to be solved in order to meet the above technical requirements: 1. The instability of concrete at high temperatures , 2. The problem of low thermal conductivity of concrete

Method used

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  • Novel heat accumulation concrete for solar thermal power station and preparation method for novel heat accumulation concrete
  • Novel heat accumulation concrete for solar thermal power station and preparation method for novel heat accumulation concrete
  • Novel heat accumulation concrete for solar thermal power station and preparation method for novel heat accumulation concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for a new type of heat storage concrete used in solar thermal power plants, using geopolymer formed by calcined metakaolin-modified water glass as the cementitious material, basalt as the coarse aggregate, and steel slag sand as the fine aggregate ( fine aggregate), and steel fiber, organic fiber, graphite powder and water reducing agent are mixed into it at the same time, and it is formulated according to Table 1. After conventional stirring, molding and maintenance, the heat conducting The tube was heated to a temperature of 45±5°C for 6h, and then heated to a temperature of 85±5°C for 6h.

[0027] Table 1

[0028]

[0029] in:

[0030] Metakaolin: obtained by calcining kaolin at 650°C for 8 hours.

[0031] Modified water glass solution: a water glass solution modified by NaOH solution with a modulus of 1.2 and a Baume degree of 40%.

[0032] Steel slag sand: its fineness modulus is 2.8.

[0033] Basalt: basalt with a particle size of 5-25...

Embodiment 2

[0040]A preparation method for a novel heat storage concrete used in a solar thermal power station, comprising the steps of:

[0041] The geopolymer formed by calcined metakaolin-modified water glass is used as cementitious material, basalt is used as coarse aggregate, copper ore sand is used as fine aggregate (fine aggregate), and steel fiber and organic fiber are mixed into it , graphite powder and water reducing agent, and according to Table 2, after conventional stirring, molding and maintenance, before formal use, heat it up to 50±5°C for 8 hours through the embedded heat pipe, and then Heat up to 90±5°C for 8h.

[0042] Table 2

[0043]

[0044] in:

[0045] Metakaolin: obtained by calcining kaolin at a temperature of 700°C for 6 hours.

[0046] Modified water glass solution: a water glass solution modified by NaOH solution with a modulus of 1.2 and a Baume degree of 40%.

[0047] Copper ore sand: its fineness modulus is 3.0.

[0048] Basalt: basalt with a parti...

Embodiment 3

[0055] A preparation method for a novel heat storage concrete used in a solar thermal power station, comprising the steps of:

[0056] The geopolymer formed by calcined metakaolin-modified water glass is used as the cementitious material, the basalt is used as the coarse aggregate, and the ordinary sand, steel slag sand, and copper ore sand are used as the fine aggregate (fine aggregate). Mix steel fiber, organic fiber, and graphite powder, and mix according to Table 3. After conventional stirring, molding, and curing, heat it up to 55±5°C through the embedded heat pipe before it is officially used. 12h, then heated to 100±5℃ for 12h.

[0057] table 3

[0058]

[0059] in:

[0060] Metakaolin: obtained by calcining kaolin at a temperature of 750°C for 5 hours;

[0061] Modified water glass: a water glass solution modified by NaOH solution with a modulus of 1.2 and a Baume degree of 38%;

[0062] Ordinary sand: its fineness modulus is 2.6.

[0063] Copper ore sand: its...

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Abstract

The invention belongs to the field of building materials, and in particular relates to a functional concrete material and a preparation method thereof. The invention relates to novel heat accumulation concrete for a solar thermal power station. 1 square meter of heat accumulation concrete is characterized by being prepared from the following raw materials by weight: 380 to 450 kilograms / meter<3> of metakaolin, 220 to 310 kilograms / meter<3> of modified sodium silicate solution, 5 to 10 kilograms / meter<3> of water reducing agent, 900 to 1,200 kilograms / meter<3> of basalt, 590 to 710 kilograms / meter<3> of fine aggregates, 10 to 20 kilograms / meter<3> of steel fibers, 0.5 to 1 kilogram / meter<3> of organic fibers and 10 to 20 kilograms / meter<3> of graphite powder, wherein a liquid-solid ratio of the modified sodium silicate solution to the metakaolin is (0.60-0.70):1; and the fine aggregates comprise ordinary sand, copper ores and steel slag sand. The high-temperature heat accumulation material prepared by the method has the characteristics of low cost, stable performance, high coefficients of heat conductivity, high durability and the like, and is easy to prepare on site.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a functional concrete material and a preparation method thereof. Background technique [0002] With the reduction of traditional non-renewable energy sources, energy issues have become increasingly prominent. Solar energy is an inexhaustible source of energy. In comparison, its utilization process is simple and reliable, and there are few energy conversion links, so people quickly focus on the utilization of solar energy. However, there is a prominent problem in the utilization of solar energy, that is, the problem of energy storage, because solar thermal power generation systems are inevitably affected by weather and day and night. An effective way is to use a heat storage system, the purpose of which is to store the heat energy when the sunlight radiation is sufficient, and release it to generate steam power generation when the sunlight radiation is insufficient o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
Inventor 何永佳吕林女何百灵胡曙光
Owner WUHAN UNIV OF TECH
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