Testing device for heat conductivity coefficients of concrete in dry state

A technology of dry state and thermal conductivity, applied in the direction of material thermal conductivity, material thermal development, etc., can solve problems such as conclusions and deviations that cannot be unified in concrete thermal conductivity

Inactive Publication Date: 2016-05-11
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0008] At present, housing comfort is already a factor that needs to be seriously considered in human production and life. Many domestic universities are conducting research on the thermal conductivity of concrete. Due to the limitation of the same concrete research results, there are some large deviations, and there is no unified conclusion on the thermal cond...

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  • Testing device for heat conductivity coefficients of concrete in dry state
  • Testing device for heat conductivity coefficients of concrete in dry state
  • Testing device for heat conductivity coefficients of concrete in dry state

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing:

[0033] like Figure 1 to Figure 4 As shown, a device for measuring thermal conductivity of concrete in a dry state is characterized in that it includes a heat insulation test box, a heating device for the lower surface of the test piece, a heat flow test device for the upper surface of the test piece, and a temperature acquisition device;

[0034] The heat insulation test box includes a left box wall 1 and a right box wall 2, the top and bottom of the left box wall 1 and the top and bottom of the right box wall 2 are all extended inwardly with ribs 3, and the left box wall The rear end between 1 and the right box wall 2 is fixed with a rear box wall 4, the bottom is fixed with a box bottom 5, the front end is movable with a front box wall 6, and the top is provided with a box cover 7 hinged with the rear box wall 4, wherein, Front, rear, left and right box walls 6, 4, 1, 2...

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Abstract

The invention relates to a testing device for heat conductivity coefficients of concrete in a dry state. The device comprises a heat insulation test box, a test piece lower surface heating device, an upper surface heat flux testing device and a temperature collecting device. The heat conductivity coefficients of the massive concrete material in the dry state are obtained through calculation by measuring the average temperature of three points in a test piece lower surface heating area and an upper surface corresponding area in a stable heat transmission state and heat flux passing through a test piece. According to the device, interlayers are arranged in the bottom and the middle of the heat insulation test box, test piece carrying platforms are arranged on the two sides of the heat insulation test box, and a polymer nanomateiral-aerogel is fully utilized for the heat insulation function; existing concrete heat conductivity coefficient testing equipment is simplified to a great extent, and the heat insulation effects achieved when the different kinds of concrete serve as an enclosure structure can be intuitively observed and compared.

Description

technical field [0001] The invention relates to the technical field of concrete performance testing, in particular to a device for measuring thermal conductivity of concrete in a dry state. Background technique [0002] The thermal conductivity of building materials is an important thermal parameter and the most direct physical quantity that truly reflects the thermal conductivity of building materials. In the field of scientific research and construction, the measurement of thermal conductivity of building materials is an indispensable link. The research and determination of the coefficient is the key to the research and development of thermal insulation materials and new concrete. [0003] At present, there are several methods for measuring the thermal conductivity of concrete: [0004] Guarded hot plate method. This method is a kind of steady-state method, based on the standard "Determination of Steady-state Thermal Resistance and Related Properties of Thermal Insulatio...

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Application Information

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IPC IPC(8): G01N25/20G01N25/18
CPCG01N25/18G01N25/20
Inventor 刘元珍王文婧秦小超李珠张家广赵林
Owner TAIYUAN UNIV OF TECH
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