Method for Determining Lubricating Layer Activator Injection Rate During Concrete Pumping

Method for Determining the Injection Rate of Concrete Lubricating Layer Activators Using an Indoor-to-Field Correlation Model

This technology determines the optimal injection rate of lubricating layer activators by creating a viscosity change model through laboratory mortar viscosity tests and establishing an indoor-to-field correlation model based on actual field pressure measurements.

Relying on experience to determine the injection rate for activating the lubricating layer during concrete pumping often leads to inconsistent pumping efficiency and difficulties in applying laboratory experimental values to field conditions.

By calculating the injection rate required to meet target pressure changes using a viscosity change model and an indoor-to-field correlation model, this technology enables the quantitative determination of lubricating layer activator injection rates in concrete pumping processes.

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Key Features:

• Preparing mortar samples for laboratory testing and measuring viscosity at varying activator concentrations to acquire experimental data.
• Generating a viscosity change model by patterning the mortar's viscosity variations based on the activator concentration from the laboratory data.
• Acquiring field measurement data on pressure changes within the pipeline according to the activator injection rate through actual concrete pumping field tests.
• Plotting points where viscosity changes and pressure changes align on a coordinate plane to form an indoor-to-field correlation model and determine the final injection rate.

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This invention was developed with support from the Ministry of Land, Infrastructure and Transport for the development of prediction techniques to improve the pumping efficiency of lubricating layer activation systems.

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