英语翻译A new type of ductile concrete material is needed to opt

英语翻译
A new type of ductile concrete material is needed to optimally meet the specified structural
performance target.Ideally this ductile concrete should have the following characteristics:
• A tensile strain capacity exceeding 1.6%,
needed to meet all three structural performance targets with a minimum amount of steel reinforcement;
• Within this straining range,the material must not crack,or if it does crack,must have crack
width self-controlled to below 100lm;
• For the hinge action performance target,a low Young’s modulus is preferred;
• The material should resist fatigue loading so that the crack widths,if any,should remain
below 100lm during its service life; and
• To support traffic load acting on the linkslab,all other properties of normal concrete,including compressive strength (minimum of 35 MPa at 28 days),should be maintained.