Articles, Guides & Reports

Extensive research and testing have shown that several types of ground glass can perform well as a pozzolanic material in concrete. Supported by these results, a new specification ASTM C1866/C1866M, “Standard Specification for Ground-Glass Pozzolan for Use in Concrete,” was published earlier this year. This article provides much of the background information and industry context that accompanied the balloting of this new document.

ACI Concrete Sustainability Forum VI took place in conjunction with the ACI Fall 2013 Convention. The Forum contained presentations on low carbon and negative-carbon concrete, sustainable cement, sustainable concrete structures, standards, Product Category Rules (PCRs) and Environmental Product Declarations (EPDs), and sustainability standardization in Korea. The presentations were followed by a summary of discussion points and concluding remarks.

Limestone calcined clay cement (LC3) is a blend of two materials that, when combined, have a synergetic effect. It allows the reduction of as much as half of the clinker content, resulting in cutting up to 40% of the CO2 emissions from the cement and concrete industry. The potential for the CO2 reduction depends on the conditions of calcination and the proximity of the clay.