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A method for judging the bleeding of cement asphalt mortar based on flocculation structure

A technology of cement asphalt and cement emulsified asphalt, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that cannot reflect the cause of CA mortar bleeding and the long time of bleeding, and achieve good operability and easy Realization, the effect of rigorous mathematical criteria

Active Publication Date: 2017-04-12
DALIAN UNIV OF TECH
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  • Description
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Problems solved by technology

However, the root of CA glue bleeding lies in the formation process of the flocculation structure of CA glue, and the bleeding rate alone cannot reflect the cause of CA glue bleeding. At the same time, CA glue usually takes a long time to bleed

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  • A method for judging the bleeding of cement asphalt mortar based on flocculation structure
  • A method for judging the bleeding of cement asphalt mortar based on flocculation structure
  • A method for judging the bleeding of cement asphalt mortar based on flocculation structure

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Embodiment Construction

[0029] In order to better understand the present invention, the content of the present invention will be further elucidated below in conjunction with the examples and accompanying drawings. Any modifications or equivalent replacements to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention should be included in the present invention. within the protection scope of the invention.

[0030] Use PxI type cement, a kind of anionic emulsified asphalt, a kind of polycarboxylate superplasticizer, a kind of thickener and water to allocate different proportions and design 9 kinds of CA mortars as examples to illustrate the effect of the present invention. The difference between the nine kinds of CA mucilage is: Examples 1 to 4 are CA mucilages with different dosages of water reducing agents; Examples 5 to 7 are CA mucilages with different water-cement ratios; Example 8 and Example 3 , Example 6, ...

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Abstract

The invention provides a method for judging cement-asphalt mortar bleeding on the basis of a flocculation structure and belongs to the technical field of building materials. A structural coefficient (lambda) of CA mortar is calculated according to the change rule of apparent viscosity (eta) of the CA mortar along with shearing time under a constant shearing speed to evaluate the flocculation structure of the CA mortar; the change rule of the structural coefficient (lambda) along with standing time is represented according to an initial structural coefficient (lambda0) and a structural coefficient increasing speed (klambda) to describe the forming process of the flocculation structure of the CA mortar; whether the bleeding phenomenon happens to the CA mortar or not is judged according to two parameter vales of the initial structural coefficient (lambda0) and the structural coefficient increasing speed (klambda). By means of the method, a rheological test is easy to implement, the calculation process of the initial structural coefficient (lambda0) and the structural coefficient increasing speed (klambda) is simple, and operability, scientificity and accuracy are good.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the formation process of the flocculation structure of cement emulsified asphalt mortar (CA mortar), and proposes a method for judging CA mortar bleeding based on the formation process of the CA mortar flocculation structure. Background technique [0002] Cement-emulsified asphalt mortar (CA mortar) is a key material in the ballastless track structure of high-speed railways, which plays a role in providing elasticity for track slabs and adjusting track construction errors. During on-site construction, CA mortar is poured into the narrow preset interlayer between the track slab and the concrete base by its own weight without additional pressure. This pouring method is not only convenient and fast, but also ensures that the CA mortar elastic layer can completely fill the interlayer between the track slab and the base layer, ensures the seamless connection between the track slab and the under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38G01N33/42
CPCG01N33/383G01N33/42
Inventor 欧阳剑
Owner DALIAN UNIV OF TECH