Micro-nano Composite Hollow Material Concrete Durability
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Solution Overview
Problem
Conventional concrete materials face issues of high energy consumption, high carbon emissions, inadequate durability, rapid hardening, shrinkage resistance, and cracking resistance, particularly under harsh conditions.
Innovation Solution
A micro-nano composite hollow structured nanometer material-modified high-durability concrete material is developed, incorporating cobaltosic oxide, nanocarbon, dioctyl sebacate, nano calcium carbonate, sodium silicate, micro-nano structured calcium molybdate, and dipentaerythritol, which are combined and processed using a high-speed kneader and twin-screw extruder to enhance concrete properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional concrete materials are used, then construction cost is reduced, but durability under harsh conditions is inadequate
Solution Approach 1:
The patent uses micro-nano composite hollow structured nanometer materials comprising multiple components (cobaltosic oxide, nanocarbon, nano calcium carbonate, micro-nano structured calcium molybdate) combined with cement and water to form a composite concrete material that achieves superior durability while addressing environmental concerns through the synergistic effects of the composite structure
Solution Approach 2:
The hollow structured nanometer materials provide localized functional zones within the concrete matrix, where the hollow structures store moisture for internal curing at specific locations, creating localized regions of improved hydration and durability without compromising the entire concrete volume
2Strength
If concrete strength is improved through conventional techniques, then mechanical performance is enhanced, but shrinkage resistance and cracking resistance are inadequate
Solution Approach 1:
The micro-nano composite hollow structured materials introduce controlled porous structures at the micro and nano scales within the concrete matrix. These porous structures manage water distribution, providing internal curing that reduces shrinkage stress and prevents cracking while maintaining high strength through the composite nanometer material structure
Solution Approach 2:
The hierarchical structure features hollow microstructures containing nano-scale features, creating nested configurations where nanometer materials are embedded within hollow spherical structures, which are themselves distributed throughout the concrete matrix, enabling multi-scale control of mechanical and durability properties
3Reliability
If hollow structured nanometer materials are added to concrete, then internal curing and strength are improved, but material complexity increases
Solution Approach 1:
Multiple functional nanometer materials (cobaltosic oxide, nanocarbon, nano calcium carbonate, calcium molybdate) are merged into a single integrated micro-nano composite hollow structured material system, combining multiple functions (strength enhancement, internal curing, shrinkage control) into one unified additive that simplifies the overall concrete formulation approach
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 significantly reduces chloride ion diffusion, shrinkage, and cracking risk, while improving strength and rapid hardening, with enhanced mechanical properties such as compressive and flexural strength, and stable expansion performance.
Implementation Method 1
Nano-sized 'channels' are present among these nanorods/nanosheets, and these channels provide effective transmission ways for the exchange between hollow portions and external substances. When a micro-nano composite hollow superstructured material is combined with concrete, as hollow structures may store some moisture required by hydration of concrete, some of the water will be slowly released from the inside to the concrete along nano-sized 'channels' on spherical shells of hollow spheres
Implementation Method 2
some of the water will be slowly released from the inside to the concrete along nano-sized 'channels' on spherical shells of hollow spheres, thus changing the hydration process of cement concrete members
Data Source
AI summary
The present invention discloses a micro-nano composite hollow structured nanometer material-modified high-durability concrete material, and according to mass parts, its raw material formula is as follows: cobaltosic oxide, 1000-1500 parts; cement, 1000-1300 parts; dioctyl sebacate, 1000-1500 parts; water, 800-1200 parts; nanocarbon, 1200-1800 parts; nano calcium carbonate, 35-50 parts; sodium silicate, 10-20 parts; micro-nano structured calcium molybdate, 50-80 parts; dipentaerythritol, 60-90 parts; and dioctyl ester 30-60 parts. The present invention enables existing concrete to be improved effectively and stably in terms of shrinkage, cracking resistance and rapid hardening; the synthetic chemical functional material may lower a chloride ion diffusion coefficient of the concrete by more than 50%, cut down shrinkage by more than 30%, and reduce the cracking risk of concrete products by 50%.