Yes, the research came out a few years ago: https://pubs.geoscienceworld.org/msa/ammin/article/102/7/1435/353606/Phillipsite-and-Al-tobermorite-mineral-cements

Yes, the research came out a few years ago: https://pubs.geoscienceworld.org/msa/ammin/article/102/7/1435/353606/Phillipsite-and-Al-tobermorite-mineral-cements https://pubs.geoscienceworld.org/msa/ammin/article/102/7/143... tl;dr: we took a long time to realize that the Romans didn't use potable water, they used saltwater; the volcanic ash they had access to was also very important