Tester for concrete free deformation

A free-deformation, concrete technology, applied in the field of testers, can solve the problems of not being able to measure free deformation, not considering the influence of deformation, and unable to measure deformation, etc.

Inactive Publication Date: 2011-10-19
SHENZHEN FANHUA ENG GRP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The reliability and accuracy of the test results depend on whether the heat release rate can be well controlled. However, the existing instruments only measure concrete at room temperature, and cannot give the concrete test object a test environment that meets the semi-adiabatic temperature rise condition.
[0005] The second is the limitation of measurement materials: some existing shrinkage testers are mainly used for mortar tests, or to limit the particle size of aggregates. Obviously, this measu

Method used

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  • Tester for concrete free deformation
  • Tester for concrete free deformation
  • Tester for concrete free deformation

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Experimental program
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Embodiment Construction

[0019] Such as figure 1 , 2 As shown, the concrete test object 5 is poured into the concrete free deformation tester of the present invention after mixing, and a deformation measuring support 9 is provided under the tester. Before pouring the concrete, the front and rear side panels of the concrete free deformation tester need to be returned to their positions, so that they are combined with the left and right side panels and the bottom side panels into a sealed state, and then lay the plastic film to reduce friction, and then stir evenly The concrete is poured into it, the position of the temperature sensor 6 is fixed, and the top side plate is covered to form a closed container. The six board surfaces 2 of the left and right, front and rear side panels, the upper side panel and the lower side panel are all embedded in a honeycomb thermal insulation layer 3, and the thermal insulation layer 3 is provided with a silicon rubber heating film 4 close to the side of the test piece. ...

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Abstract

The invention discloses a tester for concrete free deformation which has low manufacturing cost, high measuring precision, and easy operation for engineering personnel, and comprises a test box assembly, a temperature controlling assembly, a displacement sensing device, and a computer assembly. The test box assembly is a detachable closed container, and is composed of six movable assembled side plates; the temperature controlling assembly comprises an AC electric power regulator which can be controlled by the computer assembly, a silicone rubber heating film, a temperature signal conditioner, and a temperature sensor; the displacement sensing device is a displacement sensor which is disposed at the end part of a concrete test object and is in intimate contact with the object. The invention can simulate the in situ temperature of the concrete structure and measure the free deformation, has the advantages of low manufacturing cost, high measuring precision, and easy operation for users, can provide experimental basis for the optimization of mix proportion of concrete, and can furthest ensure the prevention or the inhibition of the expansion of concrete cracks so as to achieve the purpose of improving the control level and durability of concrete temperature cracks.

Description

Technical field [0001] The invention relates to a test instrument for experiments in the field of building materials, which is mainly used to measure the free deformation of concrete experimental equipment, in particular to a test instrument that simulates the temperature development of various volume concrete structures in a laboratory and measures the free deformation thereof. Background technique [0002] The free deformation of concrete is one of the important indicators to measure whether the concrete mix ratio is beneficial to reducing the risk of cracking of large-volume concrete structures. It is composed of temperature deformation, autogenous shrinkage and drying shrinkage. It also includes artificial expansion and deformation when an expansion agent is added. Only under the premise of understanding the free deformation of concrete, can we combine the actual degree of restraint and the influence of concrete elastic modulus and creep and other physical characteristics to d...

Claims

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Application Information

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IPC IPC(8): G01N33/38
Inventor 林志海郑贺伊
Owner SHENZHEN FANHUA ENG GRP
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