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A method for monitoring the mass ratio of asphalt cement and the strength growth of cement-asphalt mortar during construction

A technology of mortar strength, cement asphalt, applied in the direction of material resistance, etc., to achieve the effect of saving materials and time, low cost and simple method

Inactive Publication Date: 2015-08-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that there is no construction monitoring method for A / C in the construction process of the CA mortar layer of the ballastless track and a method for predicting the strength growth of the CA mortar in the track slab, and provides a method for monitoring the quality of asphalt cement in the construction process The method of increasing the strength of cement-asphalt mortar

Method used

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  • A method for monitoring the mass ratio of asphalt cement and the strength growth of cement-asphalt mortar during construction
  • A method for monitoring the mass ratio of asphalt cement and the strength growth of cement-asphalt mortar during construction

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specific Embodiment approach 1

[0020] Embodiment 1: A method for monitoring the mass ratio of asphalt cement in the construction process of this embodiment is carried out according to the following steps:

[0021] 1. Determine the mass ratio of asphalt to cement A / C=1.0~2.0, and then mix the cement and asphalt evenly according to the mass ratio of asphalt to cement A / C to obtain the CA of different mass ratios of asphalt to cement A / C Mortar standard samples, each standard sample has 1 to 2 parallel samples;

[0022] 2. Pour the CA mortar standard samples with different asphalt and cement mass ratios A / C obtained in step 1 into cuboid plastic molds of known size respectively, and then insert 4 pieces of copper mesh and copper mesh at equal intervals in each mold The length matches the size of the plastic mold, and the height of the end of the copper mesh exposed to the CA mortar is 2cm to 3cm, and the sample to be tested is obtained;

[0023] 3. Detect the resistance value array R corresponding to the CA m...

specific Embodiment approach 2

[0030] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the process of steps 1 to 5 is carried out under the conditions of no wind, shade and a temperature of 15-25°C. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the mass ratio of asphalt to cement is determined to be A / C=1.5-1.7. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for monitoring the asphalt cement mass ratio and cement asphalt mortar strength increase in a construction process and relates to a method for detecting the construction quality of cement asphalt mortar and the method disclosed by the problems that an A / C (Asphalt / Cement) construction monitoring method and a method for predicting the strength increase of CA mortar in track slabs do not exist in the ballastless track CA mortar layer construction process at present. The method for monitoring the asphalt cement mass ratio comprises the following steps: preparing CA mortar standard samples according to different A / C, pouring the CA mortar standard samples into a mold, inserting four copper wire meshes at equal intervals, connecting with a power supply, detecting the current and voltage, calculating the resistance value Rn, and comparing the resistance, so that the A / C control during construction can be directly judged. The method for monitoring the strength increase comprises the following steps: presenting basic linear relationship between the CA mortar resistance increase and the strength increase, and calculating the strength of the CA mortar at another moment according to the resistance at two certain known moments and one strength value by using a direct proportion formula.

Description

technical field [0001] The invention relates to a method for detecting the construction quality of cement asphalt mortar. Background technique [0002] Cement asphalt mortar (cement asphalt mortar referred to as CA mortar) is a new type of organic-inorganic composite material formed by cement, asphalt emulsion, sand and various admixtures. The important role of vibration in three aspects. [0003] The mechanical properties of CA mortar will have a huge impact on the safety, economy and comfort of high-speed railway operation. Since the main components of CA mortar are cement and emulsified asphalt, and the hardening system after cement hydration and the asphalt after emulsified asphalt demulsification are very different in terms of mechanical properties, (A / C) in CA mortar is the material At the same time, the strength of CA mortar plays a decisive role in the stability and safety of the ballastless track structure, so it is particularly necessary to monitor the strength g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04
Inventor 李云良赵九野王山山纪伦谭忆秋
Owner HARBIN INST OF TECH
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