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Method for measuring static elasticity modulus of concrete

A technology of elastic modulus and measurement method, which is applied in the direction of measuring devices, strength characteristics, instruments, etc., and can solve problems such as complex operation, high operation accuracy requirements, and long holding time

Inactive Publication Date: 2017-12-08
HOHAI UNIV
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Problems solved by technology

[0003] At present, the elastic modulus of concrete is tested using standard prism specimens, which requires the use of a large-tonnage testing machine, which requires complex operation, requires fine control of the loading value and a long holding time, requires high operating accuracy, and high time costs

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  • Method for measuring static elasticity modulus of concrete
  • Method for measuring static elasticity modulus of concrete
  • Method for measuring static elasticity modulus of concrete

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Embodiment Construction

[0022] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] The invention provides a method for measuring the static elastic modulus of concrete, which adopts a static cube split tensile test and determines the test procedure with reference to the measurement procedure of the static elastic modulus of concrete; the test obtains the transverse deformation of the center line of the cube and the corresponding load value, which are then derived from theory The calculation formula obtains the static elastic modulus; the measurement method specifically includes the following steps:

[0024] Step 1: Make a standard cubic test piece of concrete whose elastic modulus is to be measured, use the test piece as a split tensile test piece, and maintain it to the design age according to the test requirements;

[0025] Step 2: Arrange a micro-deformation meter perpendicular to the loading dir...

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Abstract

The invention discloses a method for measuring the static elasticity modulus of concrete. The method comprises the following steps: step 1, manufacturing concrete, with the elasticity modulus to be measured, into a standard cubic specimen, taking the specimen as a splitting tensile test specimen, and curing the specimen to a design age according to test requirements; step 2, preloading the specimen till the difference of two times of center line transversal deformation values meets the requirement; step 3, performing an official test on the specimen, and recording load and a center line transversal deformation value under the load when the loading speed is the same with preload and the loading stress reaches 50 percent of splitting tensile strength; step 4, taking the deformation value in the step 3 as transversal total deformation, and computing to obtain the elasticity modulus of concrete. The method is high in accuracy and simple to operate.

Description

Technical field [0001] The invention belongs to the technical field of concrete strength measurement, and particularly relates to a method for measuring the elastic modulus of concrete in a split tensile test. Background technique [0002] In practical engineering applications, in addition to strength and slump, the control indicators of concrete often have to specify the elastic modulus of concrete. In particular, when calculating the temperature stress, crack propagation, and deformation of high-strength concrete and mass concrete, it is necessary to determine the elastic modulus of the corresponding concrete. [0003] At present, the elastic modulus of concrete is tested with standard prism specimens, which requires the use of a large tonnage testing machine, which is complicated in operation, requires fine control of the loading value and has a long loading time, requires high operation accuracy and high time cost. The split tensile test can determine the elastic modulus of co...

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Application Information

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IPC IPC(8): G01N3/00
CPCG01N3/00G01N2203/0012G01N2203/0019G01N2203/0075G01N2203/0682
Inventor 陈逸杰周继凯林成欢梁远志何旭张伦超赵夕瑶孙露
Owner HOHAI UNIV
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