We are testing concrete for a project that requires 3500 psi lightweight concrete. We are not casting the samples, just picking up, lab curing and breaking. Our Coefficient of Variation for all other concrete on this job ranging from 2500 to 8000 psi is from 1.4 to 2.6 for which <3.0 is the...
I am performing a CU test on Flyash and am having problems achieving B-parameter saturation. Due to the consolidation pressures I can not increase the back pressure and cell pressures further. I am reading only about 80% B value. What are the procedures for CO2 saturation? I have a tank of 25%...
I have worked in a geotechnical laboratory atmosphere for over 17 years. I do have mild asthma but the dust has never really bothered me. I recently purchased a Surface Grinder to grind flat rock core specimens. I have a shop
vac attached to the grinding wheel housing to collect the majority...
