The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2015
Filed:
Dec. 15, 2011
Xueqing Qiu, Guangzhou, CN;
Hongming Lou, Guangzhou, CN;
Yuxia Pang, Guangzhou, CN;
Dongjie Yang, Guangzhou, CN;
Xinping Ouyang, Guangzhou, CN;
Conghua Yi, Guangzhou, CN;
Xueqing Qiu, Guangzhou, CN;
Hongming Lou, Guangzhou, CN;
Yuxia Pang, Guangzhou, CN;
Dongjie Yang, Guangzhou, CN;
Xinping Ouyang, Guangzhou, CN;
Conghua Yi, Guangzhou, CN;
South China University of Technology, Guangzhou, CN;
Abstract
This invention discloses a high-performance lignin-based water reducer with high degree of sulfonation and high molecular weight and its preparation method. This water reducer exhibits an excellent water-reducing performance, its water-reducing rate of this lignin-based water reducer reaches 25% at a dosage of 0.70 wt %, which is higher than that of the naphthalene-based water reducer and the sulfonated lignin water reducer prepared by oxidation and sulfonation of alkali lignin, and 28-days compressive strength ratio of the concrete with this water reducer to the concrete without this water reducer is up to 150:100. Furthermore, the water reducer of present invention will not be crystallized in winter, and the concrete iron won't be corroded. The water reducer of the present invention makes the concretes having a low bleeding rate, excellent properties of workability, anti-freeze and anti-carbonization.