An amende nt should decrease bulk density increase toltal porosity and incr ease water and air content.
改良剂能降低容重，增加总孔隙度，增加水和空气的含量。
To split tensile strength and flexural strength, with the increase of air content, strength increase firstly and then decrease.
对于劈裂抗拉强度和抗折强度而言，随着含气量的增加，强度先增加后减小。
Increase of carrier addition will result in the decreased oxygen transfer efficiency, shortened recycle time, mixing time as well as the decrease of air content.
载体加入量增加，会导致氧传递性能下降，循环时间和混合时间缩短，气含率减小。
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