Yeah , it ' s awesome . I love doing long exploration runs for some reason . It ' s probably the thrill of being first ! to see a system thousands of light years from any kind of civilization , all while running the risk of losing all of my exploration data . And I ' ve always been jealous of the CMDRs who play it in VR . <| sep |> Impact isn ' t the only form of stress that concrete has to endure . Though mostly the stress comes from extreme temperature variations such as outdoor structures in a northern climate . However , relevant to this post , putting large pieces of glass in concrete weakens it by increasing the potential for ASR due to excess alkalinity in the concrete mix reacting with the silica of the glass . It creates a gellike material around the glass pieces which is significantly weaker than the surrounding concrete . The best way to avoid this is to add more fine particle silica to the concrete mix to react with any potential excess alkalinity . This has an added bonus of significantly increasing the strength of the concrete mix overall .