Device for testing early frost heave deformation of cement concrete and method thereof

A cement concrete and testing device technology, applied in the direction of material thermal expansion coefficient, etc., can solve problems such as poor precision and cumbersome testing process, and achieve the effects of convenient operation, wide application range and simple working principle

Inactive Publication Date: 2018-04-20
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology

[0003] The present invention aims at overcoming the problems of cumbersome testing process and poor accuracy of test results due to the large influence of experimenter and ambient temperature in the current testing method for early frost dama...

Method used

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  • Device for testing early frost heave deformation of cement concrete and method thereof

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0018] Such as figure 1 As shown, a test device for early frost heave deformation of cement concrete, including a container A1, the container A1 is a double-layer container with a cavity, the container A1 is equipped with a freezing liquid 2, and rubber is placed in the freezing liquid 2 Sealed bag 7, the concrete sample 8 of testing is housed in rubber sealed bag 7; Temperature sensor 6 is installed on the container A1 inner wall; The top and bottom of container A1 outer wall are provided with inlet valve 4 and outlet valve 5 respectively, and the top of container A1 is provided with sealing Cover 3, a circular hole 9 is arranged at the center of the sealing cover 3, and a cable 15 is passed through the hole 9, and one end of the cable 15 is tied to the upper port of the rubber sealing bag 7; the other end of the cable 15 is connected by a pulley A1...

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Abstract

The invention relates to a device for testing early frost heave deformation of cement concrete and a method thereof, which solve the problem of large precision difference of test results due to ambient temperature influence in the prior art. The device is characterized in that one end of a cable ties an upper end of a sealing bag, the other end is connected with an upper end of a container B through a pulley, and a lower part of the container B is immersed below a water surface in a container C. The testing method comprises the following steps: placing the sealing bag in freezing liquid, continuously adding fine sand in the container B, wherein the top of the container B and the sealing bag are in a same height, and recoding height of the liquid surface in the container C; and when a buoyancy added value of the container B in the container C is equal with the buoyancy added value generated by expansion of the sealing bag, performing conversion to obtain volume swelling capacity generated by concrete freezing by monitoring a difference value of water scale values H in the container C. The method is capable of evaluating freeze injury damage degree by monitoring the early frost heaveamount of concrete, and performing real-time monitoring on volume deformation of frozen concrete, and precision is high.

Description

technical field [0001] The invention relates to the technical field of application of engineering materials, in particular to a testing device and method for early frost heave deformation of cement concrete. Background technique [0002] Cement concrete is currently the most widely used civil engineering material, and its mechanical strength and volume stability are the most important performance indicators affecting the engineering application of this type of material. As we all know, the reason why concrete has high strength is due to the hydration reaction between cement particles and water, and the hydration reaction of cement requires the existence of liquid water and long-term curing to meet the design strength requirements; at the same time, even In the presence of liquid water, the hydration reaction rate of cement will also be significantly reduced, and the strength will increase slowly. Therefore, when the freshly mixed concrete is subjected to low-temperature env...

Claims

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Application Information

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IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 姜怀宝杨树立尹国安
Owner BC P INC CHINA NAT PETROLEUM CORP
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