In October 2000, the American Concrete Institute's Technical Activities Committee approved publication of a commemorative compilation honoring Bryant Mather for his significant contributions to concrete technology. This publication, Investigating Concrete - Selected Works of Bryant and Katharine Mather, is the result of a cooperative effort by Mather, Celik Ozyildirim, and ACI Chief Engineer Shuaib Ahmad.It is divided into seven parts: potential of concrete, cementitious materials, aggregates, durability of concrete, petrographic examination of aggregates and concrete, specifications for use of concrete in transportation structures, and research and emerging technologies. This publication also includes an appendix with a bibliography of selected works of Bryant and Katharine Mather