Method for testing uniaxial compression elasticity modulus of inorganic binder stabilizing material
An inorganic binder and stable material technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of difficulty in obtaining real, reliable and consistent results, poor test repeatability, etc., and achieve short test cycle, Good reproducibility and improved measurement accuracy
Inactive Publication Date: 2013-01-16
山东省交通科学研究所
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Problems solved by technology
During the loading process, due to the influence of the end surface effect of the specimen, the measured axial deformation of the top and bottom surfaces of the specimen is greater than the actual axial deformation, so that the measured elastic modulus is smaller than the actual elastic modulus of the material. The loading method of loading and unloading in stages, the repeatability of the test is poor, and it is difficult to obtain true, reliable and consistent results
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[0027] Test device:
[0028] as attached figure 1 As shown, the test devices and components involved in the test process are mainly loading equipment, loading plate 1, LVDT sensor 2, rigid ring 3, positioning bolt 4, detachable bolt 5 and control system.
[0029] experiment procedure:
[0030] a) Preparation and processing of test specimens
[0031] Use vibration or static pressure forming equipment to form or drill cores on site to prepare cylindrical specimens with a diameter of 100mm~150mm and a ratio of diameter to height of 1:1.2~1:1.8. After indoor or on-site curing, forming or core drilling specimens Need to meet the design strength requirements.
[0032] b) Strain sensor installation
[0033] as attached figure 2 , 3 As shown, the two rigid rings 3 are respectively fixed in the middle of the cylindrical specimen 6 by three positioning bolts 4, and the initial distance between the two rigid rings 3 (that is, the distance between the axial deformation measurement ...
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Abstract
The invention discloses a method and a device for testing indoor uniaxial compression elasticity modulus of an inorganic binder stabilizing material and belongs to the field of road engineering tests. The method comprises the following steps of: continuously and uniformly applying axial pressure to a cylindrical test piece made of the inorganic binder stabilizing material in a monotonic loading mode by using a press until the maximum acting force which can be borne by the test piece is reached; and measuring axial deformation of an intermediate section of the test piece by utilizing an axial displacement sensor arranged on an intermediate section on a side face of the cylindrical test piece in the loading process, and determining the uniaxial compression elasticity modulus of the test piece in a linear range at the initial loading stage according to a stress-strain curve. Compared with the conventional testing method, the method for testing the indoor uniaxial compression elasticity modulus of the inorganic binder stabilizing material has the advantages that the adverse effect of an end face effect is eliminated, and the method has the characteristics of high measuring precision, high reproducibility, simplicity in test and the like and has high popularization and application value.
Description
technical field [0001] The invention relates to the field of road engineering tests, in particular to an indoor uniaxial compression elastic modulus test method of an inorganic binder stabilized material. Background technique [0002] Inorganic binder stabilizing materials play a pivotal role in the construction of highway pavement in my country. As the main load-bearing layer of pavement structure, it determines the length of service life of pavement. The elastic modulus of the material is the main design parameter of the pavement structure, and the accuracy of its value has an important impact on the rationality and economy of the pavement structure design. [0003] In the existing indoor compressive rebound modulus test method for inorganic binder stabilized materials, the axial deformation measurement point of the specimen is located on the top and bottom surfaces of the specimen, and the loading method of loading and unloading step by step is adopted. During the loadin...
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Inventor 韦金城余四新马士杰董昭韩文扬付建村王晓燕刘顺斌
Owner 山东省交通科学研究所