01150979

Component

Concrete containing slag cement (i.e., interground with clinker or replacing ordinary portland cement) has been widely used for many years and has provided proven long-term performance. On the other hand, there are concerns about the deicer salt scaling resistance of concrete containing high amounts of slag (e.g., 50% and up). These concerns are generally based on laboratory results obtained from ASTM C672 procedure. However, laboratory results are not generally consistent with field observations. A literature survey has been conducted to compile laboratory data from reported ASTM C672 tests along with field performance data. The objective was to seek evidence that would support the selection of an upper limit for slag dosage in concrete that will be exposed to deicer salts. The findings were that when using up to 50% slag it is possible to produce concrete that is resistant to salt scaling. However, slag content is not the sole factor controlling scaling resistance but construction related issues such as finishing and curing are also significant. In addition, the current ASTM C672 procedure reportedly does not reliably predict field performance of concrete containing slag.

01147878

10-1042

English

11p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (3) ; References; Tables (1)

Concrete; Corrosion resistance; Data collection; Deicing chemicals; Reactions in concrete; Scaling (Concrete); Slag cement

Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2010 Paper #10-1042

PRP, TRIS, TRB

Jan 25 2010 10:28AM