保证强度 meaning in English

guaranteed strength
proof strength

Method for the derivation of minimum values of proof strength of steel at elevated temperatures
高温下钢保证强度最小值的导出法
Method for the derivation of minimum values of proof strength of steel at elevated temperatures
高温下钢保证强度最小值的运算方法
The study on hpec mortar shows that restricted expansive ratio ( e2 ) increases in the curve of parabola with the increase of the dosage of calcium sulphoaluminate ( csa ) expansive agent . so there is a suitable range of csa dosage ( generally 6 % - 12 % ) . in this range , e2 of hpec mortar can reach as high as ( 5 - 10 ) 10 ~ 4 , and the strength is not decreased
对hpec砂浆的研究表明，限制膨胀率随膨胀剂csa掺量的增加呈抛物线形式递增，存在一个合适的csa掺量范围(一般为6 - 12 ) ，在该范围内hpec砂浆限制膨胀率可高达5万- 10万，且保证强度不下降，这就为设计不同膨胀能级膨胀混凝土而又保证混凝土强度等级提供了空间。