Direct drawing device and direct drawing method for detecting compressive strength of concrete

Direct drawing device and direct drawing method for detecting compressive strength of concrete

CN
  • CN 101,762,421 B
  • Filed: 02/09/2010
  • Issued: 05/25/2011
  • Est. Priority Date: 02/09/2010
  • Status: Active Grant
First Claim
Patent Images

1. straight draw out method that detects concrete crushing strength, it is characterized in that:

  • the straight pulling device of the detection concrete crushing strength that this method is used, comprise the standard component and the drawing instrument that be attached thereto bonding with the detected concrete member, described standard component is that columnar steel directly pulls out standard component (1), the connector that the center has a connector (2), described steel directly to pull out on the standard component at the bottom of the outer side neck of its cylinder is connected with the drawing instrument;

    The external diameter that described steel directly pulls out standard component (1) is 48mm, and internal diameter is 45mm, and height is 22mm;

    Connector (2) diameter that described steel directly pulls out standard component (1) is φ

    15mm, and connector length is 15mm;

    Described drawing instrument is made up of pulling force sensor, hydraulic pressure drawing instrument and load table;

    The detection step of the straight draw out method of described detection concrete crushing strength is as follows;

    Step

         1) goes up tested plane of selection at detected concrete parent (6);

    Step

         2), the hollow water that adopts internal diameter to be not less than 45mm bores, creep into to the concrete component internal vertical from the position vertical with above-mentioned tested plane, form the annular groove (3) that a degree of depth is not less than 50mm, described annular groove is separated at hoop with detected concrete (7) and detected concrete parent (6);

    The step

         3) coating adhesive directly pull out at the bottom of the cylinder tube of standard component (1) in steel and the tube inwall on, the cylinder that steel is directly pulled out standard component inserts in the above-mentioned annular groove (3), makes directly to pull out standard component and bond with detected concrete (7);

    After step

         4) was treated the coating adhesive sclerosis, the connector (2) that steel is directly pulled out the standard component center was connected with the drawing instrument, starts the drawing instrument;

    After the step

         5) steel directly pulls out standard component (1) and is subjected to the effect of drawing instrument, make and produce simple tension in the detected concrete (7), drawn badly until detected concrete (7), concrete destruction face (5) appears at a certain position of detected concrete (7);

    Step

         6) record detected concrete parent (6) is subjected to drawing to destroy the pulling force peak value of moment;

    Step

         7) is inferred the compressive strength of the concrete members of surveying to the prior concrete strength-measuring formula of setting up of moment pulling force peak value substitution according to the concrete strength-measuring formula;

    The prior strong formula of setting up of survey;

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