Patent · US Active

Secondary synthetic method for calcium sulphoaluminate mineral in Portland cement clinker

US8404039B2 · kind B2 · utility

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8References

9Claims

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Assignee

NANJING UNIVERSITY OF TECHNOLOGY · CN

Inventors

Xiaodong Shen · Beijing, CN
Suhua Ma · Nanjing, CN
Xuerun Li · 安丰镇, CN
Lin Chen · Huainan City, CN
Weiqiang Zhou · Beijing, CN
Song Deng · 安丰镇, CN

Key dates

Filing date	Jul 15, 2010
Grant date	Mar 26, 2013
Priority date	—
Expiry date	Jul 15, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B7/04
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for secondarily synthesizing calcium sulphoaluminate mineral in Portland cement clinker is provided. The method includes adding gypsum into raw Portland cement, calcination, then heating twice to re-form calcium sulphoaluminate mineral that has decomposed at high temperature in the clinker. This method can increase the content of calcium sulphoaluminate mineral in the clinker. As a result, the advantages of the calcium sulphoaluminate mineral in the clinker may be obtained, such as improvement of the early stage performance and long-term performance of the cement clinker and increase in the quantity of mixture in the cement.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.