作业帮According to previous ACI [7] and AASHTO codes [8],crack wid
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/23 18:53:14
According to previous ACI [7] and AASHTO codes [8],crack widths should be kept below
330lm as outdoor exposure limit for durability.Based on water permeability test data (e.g.[9]),
concrete cracks below 100lm have the same coefficient of permeability as sound concrete.
This stringent requirement is desirable but difficult,if not impossible to achieve with normal
concrete.Gilani and Jansson [10] reported that the eight concrete link-slabs built in Michigan
between 2001 and 2003 generally perform well when carefully designed and constructed.In
under-performing link slabs with inadequate amounts of reinforcement,crack widths of 250–
500lm were found.
330lm as outdoor exposure limit for durability.Based on water permeability test data (e.g.[9]),
concrete cracks below 100lm have the same coefficient of permeability as sound concrete.
This stringent requirement is desirable but difficult,if not impossible to achieve with normal
concrete.Gilani and Jansson [10] reported that the eight concrete link-slabs built in Michigan
between 2001 and 2003 generally perform well when carefully designed and constructed.In
under-performing link slabs with inadequate amounts of reinforcement,crack widths of 250–
500lm were found.
根据此前的ACI [7]和AASHTO规范[8],作为耐久性的户外暴露限值,裂缝宽度应保持在低于330lm.基于水渗透性测试数据（例如[9]）,低于100lm的混凝土裂缝具有与声混凝土相同的渗透系数.这种严格的要求是可取的,但普通混凝土要达到这个要求,即使不是不可能的,却也是困难的.Gilani和Jansson[10]报道,2001年和2003年之间建于密歇根的八个混凝土链接桥板,经过精心设计和建造,普遍表现良好.在性能较差的,钢筋量不足的链接桥板中,发现了250-500lm的裂缝宽度.
According to previous ACI [7] and AASHTO codes [8],crack wid
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