Testing method of concrete partial carbonization area depth

Abstract

The invention discloses a testing method of the concrete partial carbonization area depth. The testing method comprises the following steps of 1, forming a concrete specimen and conducting carbonization processing after form stripping maintenance; 2, obtaining a sound speed value of the specimen through an ultraviolet test; 3, adopting a thermogravimetric analysis method to measure partial carbonization area depth of the specimen; 4, fitting the obtained sound speed value and a partial carbonization area depth value to obtain the relation between the sound speed value and the partial carbonization area depth and obtaining the partial carbonization area depth of corresponding concrete by testing the sound speed value of the specimen. According to the method, by building a fitting relation between the concrete partial carbonization area depth and the ultrasonic wave sound speed of the concrete, on the condition that the specimen is not damaged, the partial carbonization area depth of thecorresponding concrete can be obtained simply by testing the ultrasonic wave sound speed, in the testing process, the integrity of the specimen is guaranteed, and damage caused by cleaving the specimen is also avoided; moreover, the testing method is accurate in testing result and is more concise and more economical.

Description

technical field [0001] The invention relates to a method for testing the carbonation depth of concrete, in particular to a method for testing the depth of a partial carbonation zone of concrete, which belongs to the field of building material detection. Background technique [0002] As an economical building material, concrete has been widely used in the construction field. After the concrete is prepared, the hydration reaction of cement will occur inside. After the hydration of the cement is completed, certain pores will be formed inside the cement stone. These pores become the CO 2 Enter the channel for carbonization inside the concrete, and the carbonation reaction process is shown in formulas (1) to (4). [0003] Ca(OH) 2 +CO 2 →CaCO 3 +H 2 O (1) [0004] (3CaO·2SiO 2 ·3H 2 O)+3CO 2 →(3CaCO 3 2SiO2 2 ·3H 2 O) (2) [0005] (2CaO·SiO 2 )+2CO 2 +nH 2 O→(SiO 2 ·nH 2 O)+2CaCO 3 (3) [0006] (3CaO·SiO 2 )+3CO 2 +nH 2 O→(SiO 2 ·nH 2 O)+3CaCO 3 (4) ...

AI Technical Summary

Problems solved by technology

[0011] Purpose of the invention: Aiming at the problem that the existing methods for testing the depth of partial carbonization in concrete are complicated and expensive, the present invention provides a method for testing the depth of partial carbonization in concrete. The fitting relationship can be established based on propagation velocity, which can be used to measure and calculate the partial carbonation zone depth of concrete conveniently and quickly.

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