Impact of Lignin-Based AE Water-Reducing Agent, and BNS- and PCE-Based Superplasticizers on the Properties of Hardened Concrete

This paper describes how lignosulfonate-base air-entraining (AE) water-reducing agents have been used in various concrete structures for over five decades. Polycarboxylate-based superplasticizers, which are the main superplasticizers in use today, have been on the market for 20 years and have recently been applied to various kinds of concrete structures. Therefore, it is important to know the difference that these three dispersants (lignosulfonate-based (LG), B-naphthalenesulfonate-based (BNS), and polycarboxylate-based (PC)) have on concrete durability. The authors, using superplasticizers containing each dispersant, studied the properties of concrete at a water cement ration (w/c) of 0.50 up to the age of 20 years. This paper discusses the experimental results up to the age of 3 years following standard curing and artificial sea water curing, and under normal external exposure and exposure in a splash zone. As a result, no major difference has been observed in the effect on properties of the hardened concrete between PC and BNS, dispersants in superplasticizerss. In addition, the authors consider that concrete incorporating PC base superplasticizer or BNS-based superplasticizer has equal durability to that of concrete incorporating an AE water-reducing agent, most of which is in service over the long term.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780870313370
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Ohno, Masahiko
  • Suglyama, Tomomi
  • Sugamata, Takumi
  • Ohta, Akira
• Conference:
  • Ninth ACI International Conference on Superplasticizers and Other Chemical Admixtures
  • Location: Seville , Spain
  • Date: 2009-10-13 to 2009-10-17
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 371-380
• Monograph Title: Superplasticizers and other Admixtures in Concrete

Subject/Index Terms

• TRT Terms: Air entrained concrete; Concrete; Concrete hardening; Concrete structures; Durability; Lignin; Polycarbonates; Superplasticizers
• Uncontrolled Terms: Polycarboxylates; Polynaphthalene sulfonate
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01159931
• Record Type: Publication
• ISBN: 9780870313370
• Report/Paper Numbers: SP-262-28
• Files: TRIS
• Created Date: Jun 30 2010 6:53AM