USE OF HYDROPHOBIC AGENTS AS CONCRETE ADMIXTURES

Environmental-induced degradation of reinforced concrete structures can be reduced by preventing water penetration into concrete pores using hydrophobic agents as concrete admixtures. In order to point out problems related to their practical use, the effectiveness of hydrophobic admixture on cement pastes with different w/c, and in the presence of other commonly used chemical admixtures, was studied. Capillary water absorption and the contact angle between water drops and the cement paste surface were evaluated. Changes in the cement paste porosity due to the hydrophobic admixture were studied by porosimetric analysis. Results obtained show that the hydrophobic admixture is able to reduce the prolonged capillary water absorption in all cement pastes by about 70%, regardless of how it is added. The hydrophobic agent appears even more effective during the initial phase of water absorption, especially with increasing w/c.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870311131
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Moriconi, G
  • Tittarelli, F
• Conference:
  • Sixth CANMET/ACI International Conference on Durability of Concrete
  • Location: Thessaloniki, Greece
  • Date: 2003-6-1 to 2003-6-7
• Publication Date: 2003

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 279-288

Subject/Index Terms

• TRT Terms: Admixtures; Capillary water; Concrete structures; Durability; Hydrophobic properties; Pore water; Porous pavements; Reinforced concrete; Structural deterioration and defects; Water cement ratio
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00964474
• Record Type: Publication
• ISBN: 0870311131
• Report/Paper Numbers: SP-212-18
• Files: TRIS
• Created Date: Oct 1 2003 12:00AM