Self-compacting concrete mixture stability test device and test method for filling layer

Abstract

The invention discloses a device for testing the stability of a self-compacting concrete mixture of a filling layer and a testing method thereof. In the center of the bottom of the support, the surface layer slurry thickness tester (2) is vertically installed in the hollow conduit (6) at the center of the support directly above the cylindrical tube and tightened The fastener is fixed, and the surface layer slurry thickness tester (2) can freely fall downward along the support after the fastener is loosened. The method of the invention has the characteristics of simple operation, convenient use, scientific rationality, etc., and wide application range, and is especially suitable for the construction quality control of self-compacting concrete of CRTSⅢ slab ballastless track filling layer or similar structures.

Description

technical field [0001] The invention relates to a performance test and evaluation method of railway engineering materials, in particular to a test device and evaluation method for the stability of self-compacting concrete mixture used for filling layers of type III slab ballastless tracks of high-speed railways. Background technique [0002] my country's high-speed railway construction technology has achieved world-renowned achievements, and its construction and operation mileage ranks first in the world. At present, the track structure of my country's high-speed railway mainly adopts ballastless track technology, which covers a variety of slab ballastless track structures such as CRTSI type, CRTS II type and CRTS III type. The filling layer is the key component and core technology of the above track structure. CRTSI and CRTS Ⅱ slab ballastless track adopt cement emulsified asphalt mortar filling layer technology, which is a ballastless track technology through introduction,...

AI Technical Summary

Problems solved by technology

Obviously, the construction object involved in the present invention—the slab track filling layer is a special structure, which puts forward more stringent requirements on the performance of self-compacting concrete, especially the stability performance. The high-strength precast concrete track slab is well bonded, which requires that the self-compacting concrete of the poured filling layer has good overall uniformity, and no slurry layer or bubble layer will appear on the upper surface. The above-mentioned existing methods cannot be used to evaluate self-compacting concrete mixing. The above stability of the substance

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