We have 6 concrete cooling towers (wet/dry cycles are common) that are fast deteriorating by spalling. We suspect that chert was used in the aggregate and that it is causing chunks to pop at the surface. I need information on the behavior and composition of chert. The chert near the surfaces are...
We are doing s feasibility study of a steam utility tunnel of about 2000 ft and about 12'x15' wide at 30 ft depth. The tunnel is to be installed on a congested area with buildings and exiwsting utilities close by that do not permit open excavation without shoring. Other constraints include...
