@Giggs11

Assuming the feed is very close to the concrete and the receiver is equally close on the other side I do not think you will have any problem.  However, literally every piece of concrete is different.  The thickness of "one layer" is a variable along with the type and amount of aggregate and probably most important is if it contains reinforcement.  The reinforcement can act like a Faraday cage.

In a pinch, I have used only the feed, without the reflector, to connect to another CPE710.  The observed speeds were understandably slower, but still quite useable for a very temporary time period.  The two CPE710s were only about 450 feet apart, both set on maximum transmit power.  The other CPE710 had it's reflector installed and was pointed in approximately the right direction.

Sorry, I don't have the equipment to measure the beamwidth with any precision, but expect it to be a lot wider.

@MainEnterprises 

Thank you for your response, I have decided to use EAP225-Outdoor instead of CPE710.  Thanks.