Ultra-High-Performance Concrete Molding with Reduced Wall Thickness
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Solution Overview
Problem
Ultra-high-strength concrete moldings, such as slotted or drainage channels, face challenges with brittleness and require increased wall thickness for fracture stability, leading to higher costs and handling issues during construction.
Innovation Solution
A novel binder mixture of different types of cement with added limestone powder, along with specific ratios and particle sizes, creates a ductile and elastic cement paste, allowing for reduced wall thickness while maintaining stability without reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wall thickness of concrete moldings is increased to improve fracture stability, then the reliability is improved, but the weight and cost increase
Solution Approach 1:
The patent applies parameter changes by modifying the concrete composition parameters - using a specific cement mixture ratio (42.5 and 52.5 strength classes in 4:3 ratio), adding limestone powder with specific grain size distribution (0.5-2.0mm), and controlling water-cement ratio. These parameter changes result in ultra-high-strength concrete that achieves superior fracture stability with reduced wall thickness, directly resolving the contradiction between reliability and weight
Solution Approach 2:
The patent employs composite materials by creating a multi-component concrete system combining different cement types (42.5 and 52.5 strength classes), limestone powder, and carefully selected aggregates. This composite approach produces a material with optimized mechanical properties that provides enhanced fracture stability without requiring increased wall thickness, thus reducing weight while maintaining reliability
2Reliability
If the wall thickness of concrete moldings is increased to improve fracture stability, then the reliability is improved, but the cost increases
Solution Approach 1:
The patent modifies concrete composition parameters including cement strength class distribution (4:3 ratio of 42.5 to 52.5), limestone powder addition (specific grain sizes 0.5-2.0mm), and water-cement ratio control. These parameter changes produce ultra-high-strength concrete that achieves required fracture stability with thinner walls, reducing material consumption and manufacturing cost while maintaining reliability
Solution Approach 2:
The patent utilizes cost-effective materials with specific properties - limestone powder as a supplementary cementitious material, and a balanced mixture of two cement strength classes. This approach creates an economically optimized concrete formulation that delivers superior performance at reduced cost, eliminating the need for expensive thick-wall designs
3Weight of moving object
If ultra-high-strength concrete is used to reduce wall thickness, then the weight is reduced, but the brittleness increases
Solution Approach 1:
The patent creates a composite concrete system combining multiple cement types (42.5 and 52.5 strength classes in 4:3 ratio), limestone powder, and carefully selected aggregates. This composite structure provides both high strength and improved ductility, reducing brittleness while enabling weight reduction through thinner walls. The interaction between different materials creates a more resilient microstructure
Solution Approach 2:
The patent optimizes composition parameters including the ratio of different cement strength classes (4:3), limestone powder grain size distribution (0.5-2.0mm), and water-cement ratio. These parameter optimizations achieve a balance between strength, ductility, and weight, producing concrete that is both lighter and less brittle than conventional formulations
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
The solution results in a lightweight, cost-effective, and flexible concrete molding with improved elasticity and stress resistance, enabling efficient handling and transportation while meeting structural requirements.
Implementation Method 1
a binder is required, which creates the chemical, internal bond of a cement stone
Implementation Method 2
the binder comprises a mixture of at least two types of cement with different final strengths
Data Source
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AI summary
The invention comprises a concrete molded part, wherein the concrete molded part has a longitudinal body shape and is defined by a longitudinal extent and a structural cross-section with variable wall thickness, wherein the ratio of the longitudinal extent to a minimum wall thickness in the structural cross-section is greater than or equal to 400 to 7. The invention also relates to a method for producing a concrete molded part, in particular from ultra-high-performance concrete, wherein the concrete, after its mixing following the hydration of the aluminate phase, is placed in the formwork shortly before the end of the dormant phase, in which the hydration of the silicate phase takes place.The invention further relates to a concrete, in particular an ultra-high-strength concrete, wherein the concrete in its formulation comprises a binder, fillers, concrete additives and water, wherein the binder comprises a mixture of at least two cements of different final strength such as two Portland cements (CEM I) and/or a mixture of Portland cement (CEM I) and blast furnace cement (CEM III).