Determination method for levels of three factors in rubber powder modified cement stabilized crushed stone mixture

Abstract

The invention discloses a determination method for the levels of three factors in a rubber powder modified cement stabilized crushed stone mixture. The determination method comprises the following steps: determining the levels of the three factors, and carrying out a test design by virtue of an orthogonal test design method; designing a compaction test for the rubber powder modified cement stabilized crushed stone mixture according to an orthogonal test result; analysing the influences of the three factors on the maximum dry density; preparing the rubber powder modified cement stabilized crushed stone mixture according to a compaction test result, and carrying out an unconfined compressive strength test on the rubber powder modified cement stabilized crushed stone mixture; analysing the influences of the three factors on the strength of the mixture according to the result of the unconfined compressive strength test; and determining the matching relationship of the levels of the three factors according to the requirement that an unconfined compressive strength needs to meet design specifications. The method disclosed by the invention is simple and easily understood, reasonable in test times, accurate in result, and capable of determining the matching relationship of the levels of the three factors in a short time and furthest improving the comprehensive performance of a cement stabilized crushed stone base under the condition of meeting the current specifications.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a method for determining the levels of three factors in a rubber powder modified cement stabilized gravel mixture. Background technique [0002] Cement-stabilized macadam mixture has become the preferred base material for high-grade highways in my country because of its advantages such as high strength, high rigidity, excellent overall performance, good water stability and frost resistance. But this kind of base material has the fatal defect that it is easy to produce cracks, and then it is easy to cause other diseases on the road surface. [0003] Rubber powder is a kind of highly elastic material, which has a certain inhibitory effect on shrinkage deformation. On this basis, its mechanical properties are verified, and its molding process is discussed so that it can meet the complete specification requirements, so it can be used in cement stabilized cru...

AI Technical Summary

Problems solved by technology

However, at present, the research on applying rubber powder to cement stabilized macadam base is still in its infancy at home and abroad, and there is no systematic research on the reasonable dosage of each parameter in the rubber powder modified cement stabilized macadam mixture. However, in each parameter Among them, the reasonable matching relationship of the three factors of rubber powder addition amount, rubber powder particle size and cement dosage plays a decisive role. Therefore, it is of positive social significance to develop a method to determine the level of the three factors in rubber powder modified cement stabilized gravel mixture. Economic significance

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