Blended Cement Composition Reducing Cost While Maintaining Strength
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Solution Overview
Problem
Existing concrete compositions for block paving applications often lack sufficient strength and durability to withstand heavy traffic and weathering, and there is a need for high-strength mixes with a low cost factor.
Innovation Solution
A cement composition comprising a blend of Portland Cement and a cement alternative, such as limestone powder, in a ratio of 48:52 to 50:50 by weight, which provides excellent strength and density characteristics while reducing the cost of concrete production by partially replacing expensive cement with a cheaper alternative.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cement content is increased to improve strength, then concrete strength improves, but production cost increases
Solution Approach 1:
The patent applies composite materials by combining cement with limestone powder in a specific ratio (48:52 to 50:50 by weight). This composite cement composition leverages the complementary properties of both materials - cement provides binding strength while limestone powder contributes to density and cost-effectiveness, achieving high-strength concrete at reduced cost.
Solution Approach 2:
The patent changes the compositional parameters of the cement by incorporating limestone powder at 48-52% by weight. This parameter change transforms the traditional cement composition into a blended cement system that maintains or enhances strength properties while reducing dependency on expensive pure cement.
2Quantity of substance
If cement is replaced with cheaper alternatives, then production cost decreases, but concrete strength and durability deteriorate
Solution Approach 1:
The patent optimizes the replacement parameter by limiting limestone powder content to 48-52% by weight, ensuring that enough cement remains to provide adequate binding strength. This controlled parameter change allows cost reduction while preventing strength deterioration.
Solution Approach 2:
The patent creates a synergistic composite where limestone powder (48-52% by weight) complements cement rather than merely replacing it. The specific composition ratio ensures that the composite material achieves both cost-effectiveness and required mechanical properties.
3Strength
If high cement content is used to achieve high strength, then concrete withstands heavy loads better, but cost factor increases
Solution Approach 1:
The patent develops a composite cement system where limestone powder (48-52% by weight) enhances the load-bearing capacity contribution per unit cost. The composite structure allows the concrete to withstand heavy loads effectively while the blended composition reduces the cost factor compared to 100% cement formulations.
Data Source
AI summary
A cement composition for use in a concrete composition, the cement composition comprising: cement; at least one cement alternative; wherein the or each cement alternative is a powder, and wherein the cement and the cement alternative are present relative to each other in an amount of between about 40:60 (in % by weight) and 60:40 (in % by weight).