Industrial Waste Interface Joint Material for Concrete Bonding
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Solution Overview
Problem
Existing interface joint materials for concrete structures in marine environments face challenges with bonding to smooth formwork surfaces and differing material compositions, leading to poor bonding and limited durability due to high drying shrinkage and brittleness.
Innovation Solution
A novel interface joint material composed of portland slag cement, metakaolin, industrial solid waste, sodium silicate, alkali, acrylate, trivinyl ether compound, inorganic sulfite, persulfate, and a water reducing agent, which forms geopolymers and cross-linked structures for enhanced bonding and strength, utilizing a specific ratio of slag, bira nest, and fly ash industrial waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cement-based joint materials are used, then the preparation process is simple and material sources are wide, but the materials suffer from drying shrinkage and cracking in the later period, cannot play the purpose of long-term filling and reinforcement
Solution Approach 1:
The patent uses a composite material system combining inorganic components (portland slag cement, metakaolin, industrial solid waste) with organic components (acrylate, trivinyl ether compound). This composite structure allows the material to exhibit both the ease of manufacture of cement-based materials and the long-term strength, anti-shrinkage, and anti-cracking performance of polymer-modified materials.
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of industrial solid waste (slag, bira nest, fly ash), alkali activators, and polymer additives. These parameter changes transform the material properties to achieve micro-expansion instead of shrinkage, early strength development, and improved durability while maintaining manufacturing simplicity.
2Reliability
If acrylate joint materials are used, then the materials are safer and more environmentally friendly without large drying shrinkage, but the materials have lower strength and are easily oxidized and brittle
Solution Approach 1:
The patent creates a composite system where inorganic components (portland slag cement, metakaolin, industrial solid waste) provide structural strength and durability, while organic acrylate components provide environmental safety, flexibility, and anti-shrinkage performance. The synergistic combination resolves the contradiction between strength and environmental safety.
Solution Approach 2:
The patent assigns different functional roles to different components: the inorganic geopolymer matrix provides strength and structural integrity, while the organic acrylate phase provides flexibility, environmental safety, and shrinkage compensation. This local functional differentiation allows the material to simultaneously achieve high strength and environmental reliability.
3Adaptability or versatility
If traditional joint materials are used for marine environment concrete structures, then the materials can be applied generally, but the materials cannot bond well to smooth formwork surfaces and cannot bond two materials with different components simultaneously
Solution Approach 1:
The patent modifies the chemical composition by incorporating alkali activators (sodium silicate, alkali) that enhance adhesion to smooth surfaces, and polymer components (acrylate, trivinyl ether compound) that provide flexibility and bonding capability to dissimilar materials. These parameter changes enable the material to bond effectively to formwork surfaces and between concrete and formwork materials.
Solution Approach 2:
The patent uses the composite material itself as an intermediary between the concrete structure and the formwork. The material's dual inorganic-organic composition allows it to adhere to both the smooth formwork surface and the concrete interface, acting as a bonding mediator that bridges two dissimilar materials with different compositional characteristics.
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 material exhibits high bonding strength, early strength, micro-expansion, and ductility, effectively integrating with different concrete interfaces while being environmentally friendly and safe, with improved utilization of industrial waste in construction.
Implementation Method 1
the alkali acts not only to stimulate the formation of geopolymers from the inorganic materials such as the metakaolin and the industrial solid waste
Implementation Method 2
which forms geopolymers and cross-linked structures for enhanced bonding and strength
Implementation Method 3
The alkali acts not only to stimulate the formation of geopolymers from the inorganic materials such as the metakaolin and the industrial solid waste
Data Source
AI summary
An interface joint material based on industrial solid waste includes raw materials in parts by weight: portland slag cement, 80˜130 parts; metakaolin, 80˜130 parts; the industrial solid waste, 80˜130 parts; sodium silicate, 25˜35 parts; alkali, 8˜12 parts; acrylate, 30˜36 parts; a trivinyl ether compound, 1˜3 parts; inorganic sulfite, 1˜3 parts; persulfate, 1˜3 parts; a water reducing agent, 3˜6 parts, and water, 60˜80 parts. The interface joint material is suitable for a concrete interface of different components, with good bonding, high strength, and the advantages of pumping, fast hard, early strength, micro expansion and high ductility; In addition, the industrial solid waste is added into the interface joint material, which improves a utilization rate of the industrial solid waste in construction joint materials, and has significant for recycling of the industrial solid waste.