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Cement concrete linear expansion coefficient testing device and method

A linear expansion coefficient, cement concrete technology, applied in the direction of material thermal expansion coefficient, etc., can solve the problems of difficult maintenance, single value, complex equipment, etc., and achieve the effect of simple equipment operation, scientific equipment design, and easy operation

Pending Publication Date: 2019-01-08
GUANGXI JINMENG ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the equipment for testing the linear expansion coefficient of concrete is complicated, so a single value is used in pavement design
A single design value causes the performance of many pavements to differ from the design expectations, making maintenance difficult

Method used

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  • Cement concrete linear expansion coefficient testing device and method
  • Cement concrete linear expansion coefficient testing device and method
  • Cement concrete linear expansion coefficient testing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 , image 3 As shown, a cement concrete linear expansion coefficient testing device is provided, including a resistance temperature detector, a linear differential displacement sensor, a support button, a standard rod, a test bracket and bolts; the test bracket includes a vertical brace, an upper horizontal The rod and the lower base plate; wherein the upper cross bar and the lower base plate are formed by vertical struts, and the height can be adjusted by bolts; the upper cross bar is connected with one end of the linear differential displacement sensor by bolts fixedly connected; the lower base plate is provided with three support buttons, and is arranged at equal distances to form a circle of 5 cm; the minimum measurement accuracy of the linear differential displacement sensor is 0.00025 mm; the resistance temperature detector scale The accuracy reaches 0.01°C, and it can test the water temperature and the temperature of concrete within 25.4 mm of th...

Embodiment 2

[0059] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that: the lower bottom plate is provided with six support buttons, and they are arranged at equal distances to form a circle with a diameter of 7.6 cm.

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Abstract

The invention discloses a cement concrete linear expansion coefficient testing device and method. the device comprises a resistance temperature detector, a linear differential displacement sensor, spurs, a standard rod, a test support and bolts, wherein the test support comprises vertical support rods, an upper cross rod and a lower bottom plate; the upper cross rod and the lower bottom plate areerected through the vertical support rods and are in height-adjustable connection through the bolts; the upper cross rod is fixedly connected with one end of the linear differential displacement sensor. The testing method and equipment thereof are convenient to operate and reliable in detection results and have great practical significance in road pavement engineering application.

Description

technical field [0001] The invention relates to the field of road maintenance equipment, and specifically relates to a cement concrete linear expansion coefficient testing device and a testing method thereof. Background technique [0002] Cement concrete is the main building material of road pavement. It will expand and shrink under the condition of rising and falling temperature. Expansion and shrinkage have a huge impact on the short-term and long-term performance of cement concrete pavement. There are many factors affecting the linear expansion performance of cement concrete, such as water-cement ratio, aggregate type and construction technology. At present, the equipment for testing the linear expansion coefficient of concrete is complicated, so a single value is used in pavement design. A single design value results in the performance of many pavements differing from design expectations, making maintenance difficult. Contents of the invention [0003] In order to so...

Claims

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Application Information

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IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 傅琴闫强马进卢军源于发袂
Owner GUANGXI JINMENG ENG