00300nam a2200109Ia 4500008004100000082001300041082000800054245010300062245000800165260000800173300000900181231017s9999    xx            000 0 und d  a624.1834  bCAM 3aAn investigation on the cause and effect of air void coalescence in air-entertained concrete mixes 0cPCA  bPCA  c30cm