Biomass Ash Mortar for Sustainable Construction
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Solution Overview
Problem
Current construction materials face challenges such as overexploitation of sand resources and environmental issues like CO2 emissions from cement production, along with inefficient management of agricultural and forestry residues, which are often burned, causing pollution.
Innovation Solution
A mortar composition that completely replaces sand and cement with biomass ashes from agricultural and forestry residues like rice straw ash and almond shells, combined with a binder and resins, and optionally includes synthetic or natural fibers and additives, to create a sustainable and efficient construction material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sand and cement are used in traditional mortar composition, then the mortar achieves adequate structural properties, but sand resources are overexploited and CO2 emissions from cement production increase
Solution Approach 1:
The invention changes the chemical composition parameters of the binder by using alternative materials (biomass ashes, industrial by-products) instead of traditional cement, and modifies the aggregate composition by using recycled materials with controlled particle size distributions, achieving both environmental benefits and structural performance
Solution Approach 2:
The invention creates a composite binder system combining multiple materials (biomass ashes, industrial by-products, mineral additives) that work synergistically to provide both environmental sustainability and mechanical strength, replacing the simple cement-based binder
2Loss of substance
If agricultural residues are burned to eliminate them, then the residues are removed, but air pollution and particulate emissions increase
Solution Approach 1:
The invention converts the harmful act of burning agricultural residues into a beneficial process by controlling the combustion to produce ash that serves as a valuable pozzolanic material in mortar, transforming a pollutant source into a construction resource
Solution Approach 2:
Instead of completely discarding burned residues as pollution, the invention recovers the ash product and utilizes it as a functional ingredient in mortar composition, adding value to what would otherwise be waste
3Temperature
If almond shells are used to partially replace sand (10-30%), then thermal conductivity improves, but water absorption capacity increases due to porosity
Solution Approach 1:
The invention changes the physical parameters of the aggregate by using ground almond shells with controlled particle size and morphology, and modifies the surface properties through coating or treatment to reduce porosity and water absorption while maintaining thermal benefits
4Object-affected harmful factors
If rice straw ash is used to partially replace cement (10-30%), then some environmental problems are solved, but CO2 emissions from cement manufacture remain unresolved
Solution Approach 1:
The invention applies partial replacement of cement with pozzolanic materials, using rice straw ash and other by-products in optimized proportions that provide sufficient chemical reaction to reduce CO2 emissions while maintaining the necessary cement content for structural performance
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
This solution addresses the overexploitation of sand and CO2 emissions by utilizing waste biomass, reduces pollution from residue burning, and offers improved efficiency and lower costs in construction, with the mortar demonstrating suitable physical and chemical properties for use in various applications.
Implementation Method 1
The investigations carried out [9] have focused on analyzing rice straw ash as a possible pozzolanic material for use as an addition in Portland cement mixtures
Implementation Method 2
a binder selected from calcium oxide or calcium carbonate and water
Data Source
AI summary
Mortar composition and its use in construction, mortar composition for construction having biomass ashes from agricultural and forestry residues, agro-industrial residues selected from almond shell or cork, resins, a binder selected from calcium oxide or calcium carbonate and water. Such a composition presents environmental advantages by employing residues of different origins in complete substitution of cement and sand, typically used in mortars. The mortar composition of the present invention can be used both in traditional construction and with 3D printers, particularly for masonry and coating.