silence7@slrpnk.net to World News@lemmy.worldEnglish · 10 months agoA Century of Human Detritus, Visualized | “Technostuff” built in the last 100 years outweighs all the living matter on Earth.www.nytimes.comexternal-linkmessage-square13fedilinkarrow-up165arrow-down15
arrow-up160arrow-down1external-linkA Century of Human Detritus, Visualized | “Technostuff” built in the last 100 years outweighs all the living matter on Earth.www.nytimes.comsilence7@slrpnk.net to World News@lemmy.worldEnglish · 10 months agomessage-square13fedilink
minus-squareFlying Squid@lemmy.worldlinkfedilinkEnglisharrow-up2arrow-down4·10 months agoConcrete literally involves chemical changes. How exactly do you think they get the lime?
minus-squareA_A@lemmy.worldlinkfedilinkEnglisharrow-up1·10 months agoYes, of course I know for cement … but you know : my comment was about gravel (agregates in the picture) and in concrete you have aprox. 10% cement. (i have also wrote another comment about cement and carbon dioxide elsewhere in this post)
Concrete literally involves chemical changes. How exactly do you think they get the lime?
Yes, of course I know for cement … but you know : my comment was about gravel (agregates in the picture) and in concrete you have aprox. 10% cement.
(i have also wrote another comment about cement and carbon dioxide elsewhere in this post)