Beam specimen casting die, and method for testing mechanical performances of beam specimen

Abstract

The invention discloses a beam specimen casting die, and a method for testing the mechanical performances of a beam specimen. The beam specimen casting die comprises a baseboard, two side boards and two adjusting boards, the two side boards are arranged at two sides of the baseboard in parallel, and the adjusting boards are arranged between the two side boards in parallel; and every side plate comprises a surface board and two connecting boards vertical to the surface board, the lower end of every connecting board is connected with a first through hole, the upper end of every connecting board is provided with a second through hole, the connecting boards of the two side plates oppositely contact each other to form a cavity, and two casting cavities are formed between the adjusting boards and the cavity. The beam specimen casting die can be reused, and can simultaneously adjust the dimensions of a specimen, the thickness of a protection layer, the bonding length of steel bars and the diameter of the steel bars.

Description

technical field [0001] The invention relates to the technical field of concrete mechanical property testing, in particular to a casting mold for a beam-type test piece and a method for testing the mechanical properties of the beam-type test piece. Background technique [0002] The basis for the joint work of reinforced concrete is the good bonding and anchoring performance between the steel bar and the concrete. The anchorage length and extension length of the steel bar are one of the important contents of the concrete structure design, and the essence is the bonding problem. At present, the bond performance (bond strength, bond slip, etc.) The tests mainly use center pull-out specimens or beam specimens. [0003] When making the above two kinds of test pieces, because the steel bars pass through the concrete, the existing concrete molds cannot be applied to the production of this kind of test pieces, so the molds are generally made of wooden formwork to pour concrete. When...

AI Technical Summary

Problems solved by technology

[0003] When making the above two kinds of test pieces, because the steel bars pass through the concrete, the existing concrete molds cannot be applied to the production of this kind of test pieces, so the molds are generally made of wooden formwork to pour concrete. When making molds with wood, it is necessary to After cutting the formwork, nail it up with iron nails or steel nails, and then dismantle the mold by pulling out the iron nails or steel nails after pouring the test piece, which causes the board to be used only once, resulting in a waste of wood resources. And making wooden molds is time-consuming and labor-intensive, and the processing cost is also high

In addition, concrete specimens of different sizes need to be equipped with different wooden molds, which has poor versatility and increases production and processing costs

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