Winner: Pena Boulevard, Denver
A high level of collaboration and expertise was critical for the Pena Boulevard...
But now might be the time for producers to reconsider ACI committee membership....
Durable Concrete Chemistry
Admixtures are available today that can significantly increase durability. Here is...
TCP SURVEY: A New Wind Blows
Producers see business improving, but not fast enough. Pricing on the rebound.
Is Your Aggregate Alkali-Silica Reactive?
Q: We received a request to submit proof that our aggregates are not alkali-silica...
Invention disrupts a harmful environment using an electrical current.
Cracking an ASR Barrier
Waste glass has low-cost and aesthetic potential as aggregate.
Is ASR Expansion Linearly Related to Amount of Expansive Material?
We want to buy a jig to float out some of the opaline shale in our sand source. The shale is reactive and we need to reduce the expansion when the sand is tested by either ASTM C 1260, "Standard Test Method for Potential Alkali Reactivity of Aggregate," or C 1293, "Standard Test Method for Concrete Aggregates by Determination of Length Change of Concrete Due to Alkali-Silica Reaction." Is there any data to show how much you would reduce expansion if you reduced the percentage of reactive material in the sand from say 3% to 1.5%?