Sulfonated Sugar Additive for Cement Dispersion and Retarding
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Solution Overview
Problem
Current sugar-based additives, such as molasses, face challenges in effectively reducing water content and controlling retarding effects in cementitious materials, leading to suboptimal performance in concrete applications and cement grinding efficiency.
Innovation Solution
A process involving sulfonation and phosphorylation treatments, optionally accompanied by acid or alkali hydrolysis and oxidation, is applied to sugar-based materials to enhance their dispersion ability and retarding effects, making them suitable alternatives to conventional lignosulfonates in cementitious applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If molasses is used as a water reducer in concrete applications, then water reducing ability is achieved, but retarding effect becomes too strong causing very long setting time and slow strength development
Solution Approach 1:
The patent applies sulfonation treatment to molasses, which chemically modifies the sugar molecules by introducing sulfonic acid groups. This parameter change in molecular structure transforms the retarding effect while maintaining water reducing ability, allowing the additive to disperse cement particles effectively without causing excessive delay in setting time.
Solution Approach 2:
The patent creates a composite chemical structure by combining molasses with sulfonic acid groups through sulfonation. This composite material exhibits dual functionality: the molassis component provides water reducing ability through its carbohydrate structure, while the sulfonic acid groups contribute to dispersing cement particles without the strong retarding effect of pure molasses.
2Loss of time
If modified molasses undergoes two-step hydrolysis treatment, then retarding effect is reduced, but dispersibility to cement and water reducing ability remain insufficient
Solution Approach 1:
The patent employs sulfonation treatment instead of or in combination with hydrolysis to modify molasses. This chemical parameter change introduces sulfonic acid groups that enhance dispersibility to cement particles more effectively than hydrolysis alone, while better controlling the retarding effect. The sulfonation process fundamentally alters the molecular properties to achieve superior cement interaction.
3Quantity of substance
If sugar-based materials are chemically modified to improve dispersibility, then water reducing ability enhances, but manufacturing complexity increases
Solution Approach 1:
The patent applies sulfonation treatment to molasses, which is a well-established chemical modification process. This parameter change in treatment method achieves superior water reducing ability and dispersibility compared to hydrolysis or no treatment. The sulfonation process, while chemically sophisticated, uses readily available reagents and follows standard procedural protocols, making it feasible for industrial implementation.
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 treated sugar-based materials demonstrate improved dispersion properties and retarding effects, achieving performance comparable to lignosulfonates in concrete applications and enhanced grinding efficiency in cement production, thus serving as effective additives for both paste, grout, mortar, and concrete, as well as cement grinding aids.
Implementation Method 1
The invention relates to a process for preparing an additive for cementitious materials from a sugar-based material, characterised in that the process comprises the following steps: subjecting the sugar-based material to a sulfonation treatment
Implementation Method 2
subjecting the sugar-based material further to a phosphorylation treatment after the sulfonation treatment
Implementation Method 3
WO 2005/110941A1 entitled 'Molasses treatment for the 'Molassperse' surfactant production for concrete plasticizers (water reducing admixtures) and cement clinker grinding additives applications' discloses a modification method of two-step hydrolysis treatment process in which molasses is subjected to hydrolysis under acidic and alkalic conditions respectively at higher temperature
Implementation Method 4
wherein an oxidation treatment may be carried out before or after the phosphorylation treatment
Data Source
AI summary
A process for preparing an additive for cementitious materials is provided, in an admixture for paste, grout, mortar and concrete applications as well as a cement additive for cement production by grinding, from a sugar-based material. The process comprises a step of the sugar-based material being subjected to a sulfonation treatment.