【名词&注释】
外加剂(admixture)、引气减水剂(air-leading water-reducing agent)、早强减水剂(early strength water-reduced agent)、缓凝减水剂(water-reducing retarder)
[填空题]在配制混凝土拌和物时,水、水泥、掺和料、外加剂的称量应准确到(),粗、细骨料的称量应准确到()(均以质量计)