Cement stabilized broken stone scouring resistance test method based on transverse wheel roller

A cement-stabilized gravel and testing method technology, applied in the direction of weighing by removing certain components, can solve the problem of inability to carry out quantitative research and analysis, lack of ideal base material anti-scouring test equipment, and inability of the design department to provide design parameters, etc. question

Inactive Publication Date: 2018-07-06
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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Problems solved by technology

[0007] Generally speaking, there is no unified test method and index for the anti-scour performance of base materials at home and abroad. One of the important reasons is that there are no ideal anti-scour test instruments and equipment for base materials at home and abroad. Due to functional defects, there are more or less deficiencies, which cannot be well connected with the actual erosion phenomenon, quantitative research and analysis cannot be carried out, and effective design parameters cannot be provided for the design department

Method used

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  • Cement stabilized broken stone scouring resistance test method based on transverse wheel roller
  • Cement stabilized broken stone scouring resistance test method based on transverse wheel roller
  • Cement stabilized broken stone scouring resistance test method based on transverse wheel roller

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Experimental program
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Effect test

Embodiment 1

[0023] In order to verify the method, the experimental group used 6 groups of different ratios to carry out experiments. The blending method of the test group was the overall blending method. Under this blending method, the new material group, the water-stabilized old material raw material grading group and the The original gradation group of fly ash old material; the control group adopts the mixing ratio of 60% water-stabilized old material blending group, 60% fly ash old material blending group, 55% water-stabilized old material blending + fly ash old material blending group 45% group grading group to carry out, the cement dosage used is 4.5%, the test results are shown in Table 1 and Table 2:

[0024] Table 1 The results of the erosion wear test under the overall blending mode

[0025]

[0026]

[0027] From the above results, it can be seen that the anti-brushing wear rate of the water-stabilized original gradation under the overall blending method is better than tha...

Embodiment 2

[0029] As the control group of the experiment, the test uses the group of mixing 60% of water-stabilized old material, 60% of fly ash old material, and 55% of water-stabilized old material + 45% of fly ash old material for washing Abrasion test, the cement dosage used is 4.5%, and the test results are shown in Table 2:

[0030] Table 2 Results of scour abrasion test of the control group

[0031]

[0032] From the above results, it can be seen that the anti-brushing wear rate of the group with 60% water-stabilized old material is better than that of the group with 60% fly ash old material and the water-stabilized old material plus fly ash old material group, which is consistent with the related to cement mortar. Water-stabilized cement mortar coated with old materials can effectively prevent erosion and wear under dynamic water flow and dynamic water pressure under the stability of newly added cement.

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Abstract

The invention discloses a cement stabilized broken stone scouring resistance test method based on a transverse wheel roller. The cement stabilized broken stone scouring resistance test method comprises following steps: 1, reasonable grading limit is selected based on the different grades of aggregates, and a mix ratio is designed; 2, at least five binder dosages are selected based on the mix ratioand technology requirements, and optimum water content and the largest dry density of a mixed material at different dosage conditions are determined; 3, moulding of a standard test piece is realizedbased on experiments, and the optimal binder dosage is determined; 4, moulding of a double layer rut plate is carried out; 5, nourishing of the moulded test piece is carried out at standard conditionsfor 28 days; 6, after nourishing, the test piece is dried at 105 DEG C until the weight is constant, and mass m1 is obtained via weighting; 7, a transverse distributed type rut instrument is turned on for 60min; 8, after test, the rut plate is taken out from the transverse distributed type rut instrument, and is dried at 105 DEG C until the weight is constant, mass m2 is obtained via weighting, and the mass m3 of a test mould is obtained via weighting after demoulding; and 9, results are obtained based on formulas that the scouring amount is m1-m2, and the scouring rate is (m1-m2) / (m1-m3). The cement stabilized broken stone scouring resistance test method is simple, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a method for testing the anti-scouring performance of cement-stabilized gravel based on a transverse wheel mill. Background technique [0002] So far, countries all over the world have done a lot of research work on the scouring of the grassroots caused by the traffic load. From the 1980s to the 1990s, Tia (Tia, 1986), Dempsey (Dempsey, 1982), Van Wijk (VanWijk, 1985, 1989), Hansen (Hansen 1991) and others in the United States adopted observation and on-site Test method to study the pressure and flow rate of stagnant water in the void zone. [0003] Hao Peiwen and Hu Changshun from Chang'an University used the scour tester to study the scour resistance characteristics of different types of semi-rigid materials, and analyzed the formation mechanism of the scour phenomenon of semi-rigid base materials. Lime soil and lime soil are relatively poor; for sta...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 徐世法索智俞轩许鹰
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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