adding properly sand ratio can prevent gravity segregation and weeping of concrete mixture and keep the water content constant.
适当提高砂率,混凝土用水量基本不变,但能防止新拌混合料离析泌水;
natural gas in wellbore is a mixed gas consisting of various gas. due to molecular weight of all kinds of gas is different, they will occur gravity segregation under the action of gravity field.
squeeze casting can not only improve the gravity segregation and distribution of the chemical constitution of the cast but also the microsegregation of bar-shaped za27 alloy.