addition n. 1.附加,追加;附加物。 2.【数学】加法,加算。 3.【法律】(加在姓名后的)头衔,官衔;称号。 4.(建筑物的)附加部分。 have an addition (to one's family) 生孩子,添人口。 in addition 加之,又,另外。 in addition to 加之,除…外又。
Two - addition technique of flying ash and silica fume can meliorate durability of concrete ; air - entraining admixture possesses anti - freezing , descending ice point , and improving workability , and thereof it should be used in concrete . but controlling its dosage is very important to avoid strength loss 发现粉煤灰和硅灰的双掺技术能够显著改善混凝土的耐久性能,引气剂具备防冻抗冻、抗渗及提高负温混凝土工作性的优点,在负温混凝土中应该加大使用范围,但必须控制其掺量,确保强度损失较小。