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Preparation method for temperature control combined composite board template for pouring concrete beam test-piece

A technology of pouring concrete and composite panels, which is applied in the direction of molds, manufacturing tools, mold auxiliary parts, etc., can solve problems affecting the mechanical properties of test pieces, achieve high compactness, simple structure, and improve the control of temperature gradient stress

Inactive Publication Date: 2018-11-16
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the one hand, when pouring concrete beam specimens, due to the temperature gradient stress caused by the heat of cement hydration and the temperature gradient stress caused by the external air temperature, a large number of micro-cracks are likely to occur inside the concrete beam specimens, which directly affects the mechanical properties of the specimens;

Method used

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  • Preparation method for temperature control combined composite board template for pouring concrete beam test-piece
  • Preparation method for temperature control combined composite board template for pouring concrete beam test-piece
  • Preparation method for temperature control combined composite board template for pouring concrete beam test-piece

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preparation example Construction

[0042] A method for preparing a temperature-controlled combined composite slab formwork for pouring concrete beam test pieces comprises the following steps:

[0043] S1, using the electrospinning method to prepare a type A inorganic / organic temperature-controlling fiber with a phase transition temperature of 30°C to 40°C;

[0044] S2, using the electrospinning method to prepare B-type inorganic / organic temperature-controlling fibers with a phase transition temperature of 40°C to 50°C;

[0045] S3, preparing a temperature-controlled composite plate template unit;

[0046] S4, assembling the temperature-controlling composite plate template.

[0047] Among them, in S1, a certain amount of N,N-dimethylacetamide and a certain amount of absolute ethanol are used to prepare a mixed solution of N,N-dimethylacetamide-absolute ethanol, and then a certain amount of polyvinylidene fluoride is dissolved in N , in the N-dimethylacetamide-absolute ethanol mixed solution, and finally add a ...

Embodiment 1

[0057] In Example 1, during the test, the maximum cement hydration heat temperature was 54-55°C, and no leakage occurred at the same time.

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Abstract

The invention relates to the technical field of composite board templates, in particular to a preparation method for a temperature control combined composite board template for pouring a concrete beamtest-piece. A fibrous temperature control material unit is prepared by coating an inorganic phase change material with an organic material. As a result of compactness of the organic coating material,the problem that the phase change material is easily leaked is solved effectively, and control on a temperature gradient stress generated by heat of hydration of cement is improved. Meanwhile, an insulating layer is arranged additionally to improve control on the temperature gradient stress caused by outside air temperature effectively. The template is simple to construct, convenient to mount, convenient to use and good in leakproofness, and combined composite board templates of different lengths, widths and heights can be provided for pouring concrete beam test-pieces of different dimensions, so that experimental studies on concrete beams are carried out conveniently to a great extent.

Description

technical field [0001] The invention relates to the technical field of composite slab templates, in particular to a method for preparing a temperature-controlled combined composite slab template for pouring concrete beam test pieces. Background technique [0002] Experimental research has always been the main and effective method for the performance research of concrete beams. To study the characteristics of concrete beams under various types of loads, a large number of related tests must be done. Concrete beam specimens are the premise and basis for experimental research. To study the mechanical performance of concrete beams, a large number of concrete beam specimens must be poured, but there are two problems in the pouring process. [0003] On the one hand, when pouring concrete beam specimens, due to the temperature gradient stress caused by the heat of cement hydration and the temperature gradient stress caused by the external air temperature, a large number of micro-cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B7/34B28B7/00D01D5/00D01F1/10D01F6/32
CPCB28B7/34B28B7/0002B28B7/0029B28B7/0094D01D5/003D01F1/10D01F6/32
Inventor 方圆于峰项国圣武萍
Owner ANHUI UNIVERSITY OF TECHNOLOGY