Test method for evaluating cement stabilized macadam skeleton structure

Abstract

The invention discloses a test method for evaluating a cement stabilized macadam skeleton structure, which specifically comprises the following steps: preparing a to-be-tested air-dried stone mixed sample: sieving the to-be-tested air-dried stone mixed sample by adopting standard sieves with different particle sizes, and recording the passing rate of the to-be-tested air-dried stone mixed sample passing through each standard sieve; loading a to-be-detected air-dried stone mixed sample into the test mold in batches; pressurizing the test mold, crushing the air-dried stone mixed sample to be detected, carrying out grading sieving treatment again, and recording the mass of the air-dried stone mixed sample to be detected passing through each standard sieve at the moment; calculating mass loss rates of the to-be-detected air-dried stone mixed sample passing through the standard sieves before and after pressurization, adding the mass loss rates of the to-be-detected air-dried stone mixed sample passing through the standard sieves, and defining the sum as a skeleton damage index I; according to the test method for evaluating the cement stabilized macadam skeleton structure, the performance of the cement stabilized macadam skeleton structure can be pre-judged more conveniently, and the pre-judgment result is close to the actual performance of the skeleton structure.

Description

technical field [0001] The invention is applied to the field of traffic civil engineering, and relates to a test method for evaluating a cement-stabilized crushed stone skeleton structure. Background technique [0002] Cement-stabilized gravel materials not only have the advantages of high strength, good stability, and high rigidity, but also have good board properties, which are conducive to mechanized construction and low engineering cost, which can meet the needs of heavy traffic development. Therefore, cement-stabilized gravel materials are now widely used in high-grade highways. However, due to the high brittleness of cement-stabilized gravel materials, they are highly sensitive to temperature and humidity. During the process of strength formation, temperature shrinkage cracks and drying shrinkage cracks are easy to occur, and then extend to the surface layer to form reflective cracks. It will affect the stability and durability of the road surface, reduce the integrit...

AI Technical Summary

Problems solved by technology

However, so far, there is no specific discrimination method for the evaluation of the skeleton structure of coarse aggregate. Most of them use coring to observe the interface texture after the specimen is formed or establish a numerical model to detect it; use coring to observe the interface texture. The method has a certain hysteresis and causes certain structural damage to the specimen; while the detection by modeling method, due to the modeling method and the diversity of data in different environments, the detection results are somewhat different from the actual environment. difference

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