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Cement-based solar absorption material and preparation method thereof

A solar energy absorption, cement-based technology, applied in the field of cement materials, can solve the problems of limiting the development of solar heat utilization technology, poor solar energy absorption performance, etc., and achieve the effect of excellent solar energy absorption performance

Inactive Publication Date: 2015-12-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional cement-based materials have poor solar energy absorption performance, which limits the development of this novel and effective solar thermal utilization technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 100g of early-strength ordinary Portland cement (P.O52.5R), add a certain mass fraction of saturated graphite, carbon black, and iron oxide black, mix them together and then add 20g of pure water to stir evenly, and then mix the mixture Press it into a plate, and after curing, the cement-based solar energy absorbing material of this embodiment is obtained. The external mass fractions of the three components (accounting for the total weight of cement) are as follows:

[0017] Saturated graphite: 16%;

[0018] Saturated carbon black: 8%;

[0019] Saturated iron oxide black: 16%;

[0020] The various performances of the present embodiment material are shown in Table 1:

[0021] Table 1 performance

[0022] Light absorption coefficient / % 90% Maximum average temperature / ℃ 57.38 Flexural strength / MPa 16.77 Compressive strength / MPa 67

Embodiment 2

[0024] Take 100g of early-strength ordinary Portland cement (P.O52.5R), add a certain mass fraction of saturated graphite, carbon black, and iron oxide black, mix them together and then add 20g of pure water to stir evenly, and then mix the mixture Press it into a plate, and after curing, the cement-based solar energy absorbing material of this embodiment is obtained. The external mass fractions of the three components (accounting for the total weight of cement) are as follows:

[0025] Saturated graphite: 24%;

[0026] Saturated carbon black: 8%;

[0027] Saturated iron oxide black: 24%;

[0028] The various performances of the present embodiment material are shown in Table 2:

[0029] Table 2 performance

[0030] Light absorption coefficient / % 95% Maximum average temperature / ℃ 59.01 Flexural strength / MPa 14.6 Compressive strength / MPa 62.3

Embodiment 3

[0032] Take 100g of early-strength ordinary Portland cement (P.O52.5R), add a certain mass fraction of saturated graphite, carbon black, and iron oxide black, mix them together and then add 20g of pure water to stir evenly, and then mix the mixture Press it into a plate, and after curing, the cement-based solar energy absorbing material of this embodiment is obtained. The external mass fractions of the three components (accounting for the total weight of cement) are as follows:

[0033] Saturated graphite: 24%;

[0034] Saturated carbon black: 16%;

[0035] Saturated iron oxide black: 20%;

[0036] The various performances of the present embodiment material are shown in Table 3:

[0037] Table 3 performance

[0038] Light absorption coefficient / % 95% Maximum average temperature / ℃ 59.89 Flexural strength / MPa 5.7 Compressive strength / MPa 25.8

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Abstract

The invention belongs to the technical field of cement materials and particularly relates to a cement-based solar absorption material prepared through pressing of graphite, carbon black and iron oxide black doped in a certain mass percentage. 100 g of early-strength ordinary portland cement (P.O52.5R) is taken and doped with saturated graphite, carbon black and iron oxide black in a certain mass percentage (by the total weight of the cement), the mixture is uniformly mixed, 20 g of purified water is added and uniformly stirred, the mixture is pressed to form a board, and the cement-based solar absorption material is obtained through curing. The cement-based solar absorption material has excellent solar absorption performance and actual heat absorption performance and meets the technical requirements for the mechanical property of the cement-based board for a roof.

Description

technical field [0001] The invention belongs to the technical field of cement materials, and in particular relates to a cement-based solar energy absorbing material which is compressed by externally mixing graphite, carbon black and iron oxide black in a certain mass fraction. Background technique [0002] Today's energy crisis and environmental pollution are prominent problems in the development of the world today, and the use of renewable energy is an effective solution. The use of solar energy is an important part of the use of renewable energy. Photothermal conversion is the most important way of use. The application forms of solar water heaters and solar cookers are relatively fixed and single, which restricts the development of solar heat utilization technology. Buildings all over the world are mostly cement concrete structures. If cement concrete can be used to absorb solar energy, and then convert solar energy into heat energy for storage and utilization, it will ove...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 黄超王琦宋鹏杨中喜张春丽
Owner UNIV OF JINAN