Summary The compressive strengths from the concrete cylinders are the main focus of this report although air and proctor tests were also conducted. The tests conducted in the LAOP conform with the standards approved by the American Society of Testing Materials (ASTM) which are briefly described in Appendix A of the report. This report will focus on five admixtures tested on four different Lafarge cements. One of the admixtures was targeted for possible future commercial use. A brief profile of all of the admixtures and the cement used is given within the report. It was concluded that the admixture called 325-N would yie