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Method for comparing multi-parameter change rules of concrete

A technology of change law and concrete, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, instruments, etc., can solve the problems of not proposing concrete comparison methods and change rate measurement methods, and achieve construction schedule and control The effect of engineering quality

Inactive Publication Date: 2020-06-19
山西省交通科技研发有限公司
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  • Description
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Problems solved by technology

Some studies simply mentioned that the growth rates of compressive strength and elastic modulus are different, but they did not propose a systematic method for comparing the change laws of concrete multi-parameters and a method for measuring the change rate, and there is no relevant mature definition

Method used

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  • Method for comparing multi-parameter change rules of concrete
  • Method for comparing multi-parameter change rules of concrete
  • Method for comparing multi-parameter change rules of concrete

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Embodiment

[0021] During the construction of the superstructure of a continuous rigid frame bridge, construction monitoring is required to control the dual parameters of concrete strength and elastic modulus. Judgment on the data growth of these two parameters is used as a standard to control the entire construction process and construction period. The invention provides a method for comparing the variation rules of concrete multi-parameters, the specific steps are:

[0022] Step 1: In this example, the two parameters of concrete elastic modulus and axial compressive strength are selected for comparative evaluation.

[0023] Step 2: Make the test piece. According to actual engineering requirements, make concrete with C55 strength grade. The curing age is set to 4 ages of 3 days, 7 days, 14 days, and 28 days, with a total of 4 groups of specimens. According to JTG E30-2005 "Cement and Cement Concrete Test Regulations for Highway Engineering", 15 standard prism specimens were prepared f...

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Abstract

The invention discloses a method for comparing multi-parameter change rules of concrete, which comprises the following steps of: manufacturing and curing concrete test pieces with relevant sizes of multiple ages according to selected parameters to be compared; performing a corresponding test on the selected parameter to obtain a parameter value; by establishing a multi-parameter growth ratio evaluation model, the change rule among the selected parameters is compared and analyzed. The method can quickly and accurately compare the growth law of each parameter of the concrete, measure the growthrate of each parameter of the concrete, and judge the safety reserve of the parameters. In actual engineering, by comparing change rules among parameters, proper control indexes are screened on the basis of ensuring structural safety and performance to reach the standard, key control indexes are considered, engineering quality can be controlled, and the construction period can be reasonably arranged.

Description

technical field [0001] The invention belongs to the technical field of civil engineering detection, and in particular relates to a method for comparing variation rules of concrete multi-parameters. [0002] technical background [0003] Concrete is one of the most important composite materials in the field of civil engineering, with various parameters. These parameters are directly related to the quality of engineering structures and are given special attention. Among them, concrete cube compressive strength, tensile strength and elastic modulus are one of the most important mechanical indexes of concrete materials. Concrete structures and components are generally in a state of composite stress, and the strength of concrete under uniaxial stress is the most important parameter to measure the performance of concrete materials. In my country, the cube strength value is regarded as the basic index of concrete strength. In reality, the compressive strength of concrete is relat...

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Application Information

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IPC IPC(8): G01N33/38G01N3/08
CPCG01N33/383G01N3/08G01N2203/0019G01N2203/0075G01N2203/0218G01N2203/0298
Inventor 郭学兵刘志华宿钟鸣郭文龙赵晓晋申雁鹏王磊毛敏汪贤安
Owner 山西省交通科技研发有限公司
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