Quick-setting sea sand UHPC admixture prepared based on seawater and preparation method of quick-setting sea sand UHPC admixture

By using fast-condensing admixtures based on seawater preparation in seawater UHPC, the shortage of freshwater resources in seawater UHPC production was solved, and the rapid solidification and high-strength establishment of seawater UHPC was achieved, while avoiding environmental pollution caused by seawater desalination.

CN119822680APending Publication Date: 2025-04-15SHENZHEN SUMPRETEC TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411873778.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

When producing sea sand UHPC in a near marine environment, we face the problem of shortage of freshwater resources, and seawater desalination will cause environmental pollution and waste of resources.

Method used

The fast-condensing sea sand UHPC admixture prepared based on seawater, including polycarboxylic acid powder, defoaming agent, concentrated pretreated seawater, MH type carboxyethyl methyl cellulose, calcium formate and sodium fluoride, is used to pretreat the seawater and compound components to generate an admixture with fast-condensing characteristics.

Benefits of technology

The rapid solidification and high-strength establishment of sea sand UHPC has been achieved, reducing dependence on freshwater, avoiding environmental problems caused by sea water desalination, and improving the performance and resource utilization of sea sand UHPC.

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Abstract

The invention discloses a quick-setting sea sand UHPC admixture prepared based on seawater and a preparation method thereof.The admixture comprises polycarboxylic acid powder, a defoaming agent, concentrated pretreated seawater, anhydrous sodium sulfate, triethanolamine and calcium lignosulphonate, and by adding the admixture into sea sand UHPC, solidification of the sea sand UHPC can be accelerated, and the early strength can be improved. In the preparation process, the seawater is pretreated, and the concentrated and pretreated seawater is further processed and each component is added during compounding, so that a material B with a quick-setting characteristic is generated; the material A is added on the basis of the material B, that is, the UHPC special material is adjusted in real time in use in a two-mixing mode so as to meet the working performance requirement. By adopting the preparation method disclosed by the invention, the effects of improving the traditional technology and simultaneously realizing the resource utilization of the seawater sand can be achieved, and meanwhile, the effect of no subsequent environmental protection problem is achieved.
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