Irradiated Polymer Cement Paste Strength
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Solution Overview
Problem
The use of plastic as an aggregate in partial replacement of cement in cement paste can adversely impact compressive strength, making it unsuitable for various applications, and existing recycling methods, such as mechanical recycling, may degrade plastic quality and increase pollution.
Innovation Solution
Incorporating irradiated polymer particles with increased crystallinity and crosslinking, along with silicon dioxide and calcium oxide, into the cement paste to enhance its compressive strength and reduce porosity, allowing for partial replacement of cement while maintaining or improving mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If plastic is used as an aggregate in partial replacement of cement in cement paste, then greenhouse gas emissions are reduced, but compressive strength deteriorates
Solution Approach 1:
The patent applies gamma irradiation to change the physical and chemical parameters of plastic particles, increasing their crystallinity and creating crosslinked structures. This transforms the plastic from a material that weakens cement paste into one that can maintain or improve compressive strength while still enabling cement substitution and reducing greenhouse gas emissions
Solution Approach 2:
The patent creates a composite system by combining irradiated plastic particles with cement and specific additives (silicon dioxide, alumina). This composite approach allows the plastic-cement mixture to achieve compressive strength comparable to pure cement paste, resolving the contradiction between using plastic for environmental benefits and maintaining structural strength
2Ease of repair
If standard mechanical recycling is used for plastic waste, then plastic can be recovered and reused, but plastic quality degrades and additional pollution is generated
Solution Approach 1:
The patent converts the typically harmful effect of plastic waste into a beneficial building material. By using gamma irradiation to treat waste plastic particles and incorporate them into cement paste, the invention transforms plastic waste from an environmental pollutant into a functional construction material that reduces greenhouse gas emissions while managing plastic waste effectively
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 resulting cement paste exhibits comparable compressive strength to traditional cement paste, reducing greenhouse gas emissions and offering an environmentally friendly alternative for construction applications.
Implementation Method 1
irradiating the particles of the polymer with a dose of gamma radiation increasing crystallinity and crosslinking of the polymer
Implementation Method 2
irradiating the particles of the polymer with a dose of gamma radiation increasing crystallinity and crosslinking of the polymer
Implementation Method 3
a combination of the silicon dioxide and the calcium oxide may form high-density phases in the cement paste
Implementation Method 4
irradiating the particles of the polymer with a dose of gamma radiation increasing crystallinity and crosslinking of the polymer
Data Source
AI summary
Devices, systems, and methods of the present disclosure are generally directed to building material including particles of a polymer in an irradiated form, a cement including calcium oxide, and at least one additive including silicon dioxide. In cement paste formed from a mixture of these components, the polymer in the irradiated form may decrease porosity as compared to porosity of cement paste formed without the polymer, and a combination of the silicon dioxide and the calcium oxide may form high-density phases in the cement paste. With these characteristics, such cement paste may exhibit at least the same compressive strength as cement paste formed from the cement by itself. Thus, in certain instances, the particles of the polymer may displace a portion of the cement in a manner that maintains compressive strength while facilitating reduction of greenhouse gas emissions associated with cement paste formation.