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A wedge-splitting method concrete test device

A test device and concrete technology, applied in the field of physical measurement, can solve problems such as loss of reference value, and achieve the effect of eliminating the influence of vertical force and accurate calculation results

Active Publication Date: 2016-07-06
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Secondly, this standard can only be applied to test pieces whose corresponding rollers and pads are in the same vertical plane, and the length of the test piece is about 200mm, and the width is less than 200mm. If the corresponding rollers and pads are not in the same vertical plane Estimated when there is little deviation
In the current water conservancy, civil engineering, construction and other projects, the requirements for concrete have long been far beyond 200mm, especially for large-volume concrete, the DL / T5332-2005 standard provides a standard size of 200mm×200mm×200mm The test results of the test pieces are not applicable, and have basically lost their reference value in the industry. Whether the research results of the small-size test pieces in the laboratory can be extended to the large-volume concrete in the actual project is directly related to the significance and practical value of the test research. size

Method used

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  • A wedge-splitting method concrete test device
  • A wedge-splitting method concrete test device
  • A wedge-splitting method concrete test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides: a kind of concrete test device of wedge splitting method, such as Figure 1 to Figure 3 As shown, it includes a loading frame 1, two force transmission plates with a folded edge at one end and a base plate 6; the base plate 6 is provided with pads 7, one of the pads 7 is welded on the base plate 6, and the other is pasted on the base plate 6 , so that the distance between the two spacers 7 can be adjusted as required. The concrete test piece 4 is placed on the pad 7; the folded edges of the two force transmission plates are placed on the concrete test piece 4 oppositely, and the folded edges fall into the prefabricated groove at the top of the test piece 4 . The two sides of the loading frame 1 are provided with wedge plates 2; the two sides of the force transmission plate are provided with rollers 5a; The loading frame 1 is driven by a pressure device, and the wedge plate 2 separates the two force transmission plates under pressure; the force...

Embodiment 2

[0035] This embodiment 2 is improved on the basis of embodiment 1, most of which are the same, different parts such as Figure 4 to Figure 6Shown: In order to ensure the strength of the wedge plate 2, the wedge plate 2 includes a base plate 2a connected to the loading frame through the installation hole, a reinforcement plate 2b connected to the base plate 2a by bolts, and supplementary plates are provided on both sides of the base plate 2a. Plate 2c; the supplementary plate 2c is close to the base plate 2a, and the outline formed by the two is consistent with the outline of the reinforcement plate 2b; the supplementary plate 2c and the reinforcement plate 2b are fixedly connected by bolts. In this way, by replacing the reinforcement plate 2b and supplementary plate 2c of different sizes, the adjustment of the size of the wedge plate 2 can be realized to adapt to the test pieces 4 of different lengths, avoiding the need to adapt the test pieces 4 of different lengths. 4 is mad...

Embodiment 3

[0038] This embodiment 3 is improved on the basis of embodiment 1, most of which are the same, different parts such as Figure 7 to Figure 10 As shown: the adjustment plate 2 is composed of an L-shaped first plate and a second plate; the first plate and the second plate are placed opposite to each other. The rollers 5a are respectively arranged on one arm of the first plate and the second plate, and the second adjusting hole is arranged on the other arm of the first plate and the second plate. The first adjustment holes are waist-shaped screw holes, and are arranged in two rows at intervals along the moving direction of the pull plate 3 . The extending direction of the first adjustment hole is the width direction of the test piece 4 . The loading frame 1 is provided with a waist-circular installation hole consistent with the extension direction of the first adjustment hole; the wedge plate 2 is connected with the loading frame 1 through the installation hole. Since the first...

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Abstract

The invention relates to a concrete testing device using a wedged splitting tensile method and belongs to the technical field of physical measurement. The device comprises a loading frame, two force transmitting plates and a bottom plate, wherein the bottom plate is provided with two cushion rods for placing a concrete test piece; the force transmitting plates are arranged on the concrete test piece along a middle groove of the concrete test piece in a relative alignment manner; wedged plates are arranged at the two sides of the loading frame; idler wheels are arranged at the two sides of the force transmitting plates respectively; each force transmitting plate is composed of a tensile plate and an adjusting plate which are mutually overlapped; a folded edge is formed at one end of each tensile plate; each tensile plate is provided with a plurality of separated first adjusting holes along the length direction of the concrete test piece; each adjusting plate is provided with a second adjusting hole; the tensile plates and the adjusting plates are mutually and fixedly connected through bolts penetrating through the first adjusting holes and the second adjusting hole. According to the concrete testing device using the wedged splitting tensile method, the adjustable distance is realized by the splitting type force transmitting plates so that the concrete test pieces with different lengths can be tested and foundation is provided for a subsequent fracture parameter deduction formula of concrete with different lengths.

Description

technical field [0001] The invention relates to a concrete test device, in particular to a concrete test device of wedge splitting method, which belongs to the technical field of physical measurement. Background technique [0002] At present, the wedge splitting method is the mainstream test method for concrete fracture parameters (mainly including toughness, fracture energy, etc.). The standard document in the industry is DL / T5332-2005 "Rules for Fracture Test of Hydraulic Concrete". According to the empirical formula in the standard, it can be calculated only by measuring the crack opening displacement and load. Compared with other methods, this method can convert a small vertical load into a large horizontal split load, thereby reducing the requirements for test stiffness, and can offset the influence of the specimen's own weight and vertical force through design, and the operation It is simple and easy to analyze, so it has unique advantages. [0003] However, the met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 胡少伟谢建锋
Owner NANJING HYDRAULIC RES INST