Hydraulic Composition Using Ground Burned Product for Heat Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of industrial and non-industrial wastes as cement raw materials increases the hydration heat of cement, leading to decreased mortar and concrete flowability and strength development.
Innovation Solution
A hydraulic composition is developed using a ground product with specific hydraulic, silica, and iron moduli, combined with gypsum, to reduce heat of hydration and enhance flowability and strength, incorporating burned products from waste materials and inorganic powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If industrial wastes and non-industrial wastes are used as cement raw materials, then waste treatment effectiveness is improved, but hydration heat increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the chemical composition parameters of the burned product, specifically setting the CaO content at 45-60 mass%, SiO2 at 15-30 mass%, Al2O3 at 8-15 mass%, and Fe2O3 at 2-5 mass%. This parameter optimization resolves the contradiction by achieving waste utilization while controlling hydration heat through balanced chemical composition.
Solution Approach 2:
The patent uses composite materials by combining the ground burned product with gypsum (5-20 mass%) and optionally blast furnace slag (10-50 mass%). This composite approach allows the utilization of waste materials while the gypsum and slag components help regulate the hydration process and reduce excessive heat generation.
2Object-generated harmful factors
If waste materials are used as cement raw materials, then waste utilization is improved, but mortar and concrete flowability decreases
Solution Approach 1:
The patent improves flowability through parameter changes by optimizing the chemical composition of the burned product and controlling the Blaine specific surface area between 2500-4500 cm2/g. The balanced chemical parameters (CaO 45-60 mass%, SiO2 15-30 mass%, Al2O3 8-15 mass%, Fe2O3 2-5 mass%) ensure proper hydration characteristics that maintain flowability.
Solution Approach 2:
The patent introduces gypsum as an intermediary material (5-20 mass%) that mediates between the waste-derived burned product and the final mortar/concrete mixture. The gypsum regulates the hydration process and improves flowability, acting as a beneficial intermediary that enhances workability while allowing waste material utilization.
3Object-generated harmful factors
If waste materials are used as cement raw materials, then waste treatment is improved, but strength development decreases
Solution Approach 1:
The patent achieves improved strength development through parameter changes by optimizing the chemical composition (CaO 45-60 mass%, SiO2 15-30 mass%, Al2O3 8-15 mass%, Fe2O3 2-5 mass%) and physical parameters (Blaine specific surface area 2500-4500 cm2/g) of the burned product. These parameter optimizations ensure adequate strength development while maintaining waste treatment effectiveness.
Solution Approach 2:
The patent employs composite materials by combining the ground burned product with gypsum and optionally blast furnace slag. This composite structure ensures strength development through the synergistic effects of different components, where the burned product provides the base structure and the additives enhance bonding and strength properties.
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 composition effectively reduces heat of hydration, improves flowability, and promotes strength development in mortars and concretes, while effectively utilizing industrial and non-industrial wastes as raw materials.
Implementation Method 1
the amount of 3CaO.Al2O3 increases and thereby heightens the hydration heat of cement
Data Source
AI summary
A hydraulic composition including: a ground burned product A having a hydraulic modulus (H.M.) of 1.8 to 2.3, a silica modulus (S.M.) of 1.3 to 2.3 and an iron modulus (I.M.) of 1.3 to 2.8; and a gypsum. The hydraulic composition is capable of reducing heat of hydration and producing a mortar or a concrete excellent in flowability and strength development.