Method for testing flexural tensile strength of pavement concrete under complete road surface

A technology of bending and tensile strength and detection method, which is applied in the field of pavement concrete bending and tensile strength detection, can solve problems such as difficult repairs and inaccurate test methods, and achieve the effects of reliable repair quality, convenient repair work, and simple repair

Inactive Publication Date: 2011-09-07
HOHAI UNIV
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  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for detecting the flexural-tensile strength of pavement concrete under a complete pavement, so as to solve the problems of inaccurate existing test methods and difficult repairs after testing

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  • Method for testing flexural tensile strength of pavement concrete under complete road surface
  • Method for testing flexural tensile strength of pavement concrete under complete road surface
  • Method for testing flexural tensile strength of pavement concrete under complete road surface

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Embodiment Construction

[0017] The method for testing the bending and tensile strength of pavement concrete includes the following steps:

[0018] (1), see figure 1 , figure 2 , install three sets of L-shaped anchor bars symmetrically on one set of opposite side walls of the square ring-shaped wooden mold, and two sets of L-shaped anchor bars are symmetrically installed on the other set of opposite side walls, and the wooden mold 1 is fixed on the On the pavement base 1, the anchorage length is 80mm; among them, the planar size of the inner cavity of the wooden mold 2 is set to 150mm×550mm, and the height is 150mm. Choose hot-rolled ribbed steel bars with a diameter of 12mm, the length of the horizontal part is 200mm, and the length of the vertical part is the anchorage length plus the height of one half of the wooden mold;

[0019] (2) Concrete is poured on the pavement base 1. The pouring height of the concrete is the same as that of the wooden mold 2. Before the final setting of the concrete, s...

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Abstract

The invention discloses a method for testing flexural tensile strength of pavement concrete under a complete road surface, and the method comprises the following steps: symmetrically arranging reverse L-shaped anchoring reinforcing steel bars on two opposite side walls of a square annular mould and fixing the wood mould on a base course through the anchoring reinforcing steel bars; pouring concrete on the base course till the poured height of the concrete is as same as the height of the mould; after finishing pouring, maintaining the road surface under a road surface maintaining condition till reaching a detection period, and then performing a bending test on a concrete block with a preset size by utilizing a pressure tester, thereby acquiring the concrete flexural tensile strength fC; and after taking out the concrete block from the inner cavity of the mould, welding the corresponding anchoring reinforcing steel bars on the opposite side walls of the mould through a support reinforcing steel bar, pouring concrete, and finally vibrating and compacting the road surface. By using the method provided by the invention, the pit can be easily and conveniently repaired after the concrete is taken out, the repairing quality is reliable, the cost is less than the on-site core-drilling cost, the repairing operation is more convenient than the repairing operation after a core is drilled, and the repairing quality is further ensured.

Description

technical field [0001] The invention relates to a method for detecting the mechanical properties of concrete, in particular to a method for detecting the bending and tensile strength of pavement concrete. Background technique [0002] In the quality control of highway cement concrete pavement, the strength of surface concrete is a key index to determine the bearing capacity and service life of the surface structure or determine the required thickness of the surface. The pavement strength is controlled by the two indicators of pavement cement concrete flexural strength and splitting strength. During the construction process, a small beam specimen of 150 mm × 150 mm × 550 mm is generally made, and the standard maintenance is 28 days to obtain the bending and tensile strength index, which is used as the main basis for judging whether the pavement strength is qualified; when the pavement is formed, due to the small beam The size of the test piece is large, it is difficult to fo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N1/28
Inventor 张今阳陈文沈德建杨杰沈德飞
Owner HOHAI UNIV
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