摘要
在砼中，当超塑化剂掺量超过１．１％（相应砼坍落度大于２００ｍｍ）时，砼１ｄ、２８ｄ和９１ｄ的抗压强度和抗弯强度降低１５％～５０％，且空气渗透性提高。但含硅粉的砼的性能，不受超塑化剂掺量的影响。１．１％可能是水泥——超塑化剂掺量的饱和浓度。
When the dosage of superplasticizer in concrete exceeds 11% of cementitious by mass(concrete slump 200mm),the compressive strength(1d,28d and 91d)and flexural strength(28d) of concrete can be reduced by 15% to 50%,and the air permeability is increased. But the properties of concrete contained silica fume aren't effected by the dosage of superplasticizer.May be the dosage 11% of cementitious is the saturation concentration of the cement-superplasticizer mixture dosage.
出处
《低温建筑技术》
北大核心
1997年第4期2-5,共4页
Low Temperature Architecture Technology
关键词
超塑化剂
掺量
耐久性
力学性能
硅粉
混凝土
Superplasticizer,dosage,permeability,mechanical properties,silica fume.
