A reactive masonry cement mortar performance modifier, its preparation method and application

The prepared reactive masonry cement mortar construction performance modifier introduces air bubbles through the liquid film layer formed by sulfonation and esterification reactions, thereby improving construction performance. After cement hydration, the air bubbles are hydrolyzed and eliminated, solving the problem of improved construction performance but reduced strength in the existing technology, and achieving a significant improvement in construction performance and maintenance of strength.

CN118439977BActive Publication Date: 2026-05-26HUAXIN CEMENT CO LTD
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Patent Information

Application Number
CN202410503119.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-04-25
Publication Date
2026-05-26
Estimated Expiration
2044-04-25

AI Technical Summary

Technical Problem

Existing cement mortar additives improve construction performance but also increase porosity and reduce strength after the mortar hardens, making it difficult to significantly improve performance without affecting strength during the construction stage.

Method used

A reactive cement mortar construction performance modifier is used. Through the substitution sulfonation reaction of haloacid and sulfite solution and the esterification reaction of diol and short-chain fatty acid, a structure with hydrophilic sulfonate groups and hydrophobic segments is formed, forming a liquid film layer to introduce air bubbles. As the cement hydrates, it gradually hydrolyzes, avoiding the impact of air bubble rupture on strength.

Benefits of technology

It significantly improves the fluidity, consistency and water retention of masonry cement mortar, provides a good working feel, and reduces porosity by breaking up air bubbles after cement hardening without affecting mortar strength.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a reactive masonry cement mortar performance modifier and its preparation method. The preparation method is as follows: (1) a haloacid and a sulfite solution are mixed and stirred, and heated to 40-60°C for a displacement sulfonation reaction for 1-3 hours. After the reaction, the water is separated by vacuum distillation. (2) a diol and a short-chain fatty acid are added, mixed and stirred, and heated to 60-80°C. Under nitrogen protection, a catalyst and a dehydrating agent are added for an esterification reaction for 4-6 hours. During the reaction, the water generated is separated by vacuum. After the reaction, the pH of the system is adjusted to 6-7 using liquid alkali and purified. Water is added to adjust the concentration to obtain the reactive masonry cement mortar performance modifier. This invention targets the performance characteristics of masonry cement mortar and utilizes the designability of organic molecular structures to prepare a modifier that can significantly improve the fluidity, consistency, water retention, and workability of masonry cement mortar at a low dosage, while not reducing the strength of the mortar after the masonry cement has hardened.
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Citation Information

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