Excavated Clay Soil Binder Composition Selection
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Solution Overview
Problem
The construction industry faces challenges in reducing greenhouse gas emissions and achieving mechanical properties comparable to conventional cements, particularly due to the high energy consumption and carbon footprint of traditional cement production and the insufficient mechanical strength of raw earth cements.
Innovation Solution
A method for selecting the composition of a construction material using excavated clay soil, which involves measuring physicochemical properties of the soil and using a calculation algorithm to determine optimal quantities of deflocculating and activating agents, thereby forming a construction binder or site concrete with improved mechanical properties and a reduced carbon footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional Portland cement is used, then mechanical strength is achieved, but greenhouse gas emissions and energy consumption increase significantly
Solution Approach 1:
The invention changes the chemical parameters of the binder by using excavated clay soil with specific physicochemical properties (pH, clay content, particle size distribution) instead of traditional Portland cement. The calculation algorithm determines optimal quantities of deflocculating and activating agents based on measured soil parameters, transforming the soil into a binder that achieves mechanical strength equivalent to Portland cement while avoiding clinker production and associated CO2 emissions.
Solution Approach 2:
The invention replaces the thermal-mechanical system of Portland cement production (heating limestone to 1200°C to produce clinker) with a chemical system based on pozzolanic reactions. The calculation algorithm substitutes empirical trial-and-error mixing with a deterministic chemical model that predicts binder composition based on soil analysis, achieving strength through controlled chemical reactions rather than high-temperature processing.
2Object-generated harmful factors
If raw earth cement is used, then greenhouse gas emissions are reduced, but mechanical strength becomes insufficient
Solution Approach 1:
The invention creates a composite binder system combining excavated clay soil with deflocculating agents and activating agents. The calculation algorithm determines the optimal composition ratios to achieve synergistic effects where the soil provides the base matrix, deflocculating agents improve workability and density, and activating agents enhance strength development through pozzolanic reactions, resulting in mechanical properties comparable to Portland cement.
Solution Approach 2:
The invention introduces deflocculating agents and activating agents as intermediary substances that mediate between the excavated soil and the final binder properties. These intermediaries modify the soil's physicochemical characteristics to achieve desired mechanical strength, with the calculation algorithm optimizing their quantities based on measured soil parameters to ensure effective mediation.
3Reliability
If metakaolin-based cement is used, then binding properties are improved, but carbon footprint increases due to thermal treatment requirements
Solution Approach 1:
The invention performs preliminary analysis of the excavated soil's physicochemical properties (pH, clay content, particle size) before binder formulation. The calculation algorithm uses these pre-measured parameters to determine the optimal quantities of deflocculating and activating agents, eliminating the need for subsequent thermal treatment to activate the binder. This preliminary characterization enables direct use of the soil in its natural state, avoiding the carbon-intensive heating required for metakaolin production.
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 proposed method enables the production of construction materials with mechanical properties equivalent to those of conventional cement, while significantly reducing greenhouse gas emissions and energy consumption, thus addressing the environmental and performance challenges of traditional cement production.
Implementation Method 1
A method for selecting the composition of a construction material including an excavated clay soil, said construction material composition to include deflocculating agent and activating agent quantities adapted to the excavated clay soil
Implementation Method 2
the mixture of lime or sodium hydroxide and metakaolin during the hydration of the cement will induce a pozzolanic reaction. This reaction improves the binding properties of metakaolin cements
Implementation Method 3
A method for selecting the composition of a construction material using excavated clay soil, which involves measuring physicochemical properties of the soil and using a calculation algorithm to determine optimal quantities of deflocculating and activating agents
Data Source
AI summary
The invention relates to a method (100) for selecting the composition of a construction material including an excavated clay soil, said construction material composition to include deflocculating agent and activating agent quantities adapted to the excavated clay soil, said method including a step of receiving (130) a measured value of at least one physicochemical property of an excavated clay soil, and a step of selecting (170) a deflocculating agent quantity and an activating agent quantity adapted to the excavated clay soil. In addition, the invention also relates to a method (200) for calibrating a calculation algorithm for determining the composition of a site construction material, to a construction material formed from an excavated clay soil, and to a system (400) for preparing a construction material including an excavated clay soil.