摘要
Oneofthechiefmaterialsusedintheconstructionofbuildingsandroadsiseement(水泥),apowdermademainlyfromlimestone(石灰石)andclay(粘土).EventheancientEgyptiansandRomans(罗马人)usedakindofcement,butitwasnotuntil1824thatanEnglishbricklayer(泥瓦匠)developedacementstrongenoughformodemroadsandbuilding.
出版日期
2000年07月17日(中国期刊网平台首次上网日期,不代表论文的发表时间)