Hydraulic Binder Reactivity Screening via Variable Grinding
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Solution Overview
Problem
The existing methods for analyzing hydraulic binders are time-consuming and inefficient in determining the effect of parameter variations on reactivity, particularly due to the complexity of binder compositions and the need for extensive sample testing.
Innovation Solution
A device and method for producing and analyzing multiple test materials of hydraulic binders, utilizing a grinding device to vary particle size, a homogenization device for mixing, and measuring devices to determine reactivity, enabling rapid analysis of parameter effects on binder reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical analytical methods (EN 196, EN 206) are used to test hydraulic binder reactivity, then measurement accuracy is improved, but analysis time increases significantly due to test ages of up to 28 days
Solution Approach 1:
The patent applies preliminary action by performing mechanical activation (grinding) of the binder samples before the reactivity tests. This pre-treatment step modifies the particle size distribution and surface area of the binder, which accelerates the hydration reactions. By preparing the samples in advance with controlled particle sizes, the patent enables faster measurement of reactivity without sacrificing measurement accuracy, thus resolving the contradiction between precise measurement and time consumption.
2Adaptability or versatility
If binder composition complexity increases to optimize application properties, then product performance is improved, but development time and material expenditure increase
Solution Approach 1:
The patent applies segmentation by systematically varying individual parameters (such as particle size distribution, component ratios, and chemical composition) independently while keeping other factors constant. This allows the research to isolate and evaluate the effect of each parameter on binder reactivity and application properties. By segmenting the complex composition variables into manageable, independently testable factors, the patent reduces development time and material expenditure while maintaining the ability to optimize overall product performance.
3Reliability
If high material requirements are used for concrete testing, then test reliability is improved, but resource consumption and preselection efficiency worsen
Solution Approach 1:
The patent applies preliminary action by conducting accelerated reactivity tests on binder samples with modified particle size distributions before full-scale concrete testing. These preliminary tests serve as a screening tool to identify promising binder compositions that exhibit desired reactivity characteristics. By performing this preliminary assessment with smaller material quantities, the patent reduces resource consumption and improves preselection efficiency while maintaining the reliability of subsequent concrete tests through better-informed sample selection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables quick and precise analysis of hydraulic binder reactivity as a function of particle size and composition, facilitating efficient optimization of binder properties.
Implementation Method 1
a grinding device for grinding material components
Implementation Method 2
a homogenization device for homogenizing the material components and the excitation liquid
Implementation Method 3
at least one measuring device for determining the reactivity of the test material
Data Source
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AI summary
An apparatus 10 for producing and analyzing a plurality of sample materials, in particular samples of a hydraulic binder, comprises a grinding device 20 for grinding material components, at least a first metering device 18 for metering at least one material component into the grinding device 20, at least a second metering device 26 for metering an activator liquid to the at least one ground material component, a homogenizing device 24 for homogenizing the material components and the activator liquid into a sample material, wherein the apparatus 10 has a control device 38, which is in connection at least with the grinding device 20 and is formed in such a way that it varies at least a parameter that is characteristic of the grinding intensity of the grinding device, such that in particular the grain size of the material components is changed, and wherein at least one measuring device 32 is arranged for determining the reactivity of the sample material. A method for producing and analyzing a plurality of sample materials, in particular samples of a hydraulic binder, has the following steps: a) metering at least one material component into a grinding device 20, b) grinding the at least one material component in the grinding device 20, c) metering an activator liquid to the at least one material component, d) homogenizing the at least one material component and the activator liquid into a sample material, characterized in that steps a) to d) are repeated for producing a plurality of sample materials, wherein at least one parameter that is characteristic of the grinding intensity is varied at the grinding unit 20, wherein the method also comprises the step of determining the reactivity of the plurality of sample materials by means of a calorimetric measuring device 32.