According to previous ACI [7] and AASHTO codes [8],crack widths should be kept below330lm 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 a

According to previous ACI [7] and AASHTO codes [8],crack widths should be kept below330lm 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 a
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.

According to previous ACI [7] and AASHTO codes [8],crack widths should be kept below330lm 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 a
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.

根据以往的ACI [ 7 ]和AASHTO代码[ 8 ]，裂缝宽度应保持在330lm作为耐久性的户外暴露极限。基于水渗透试验数据（例如，[ 9 ]），混凝土裂缝渗透率低于100lm有相同的系数作为声混凝土。这种严格的要求是可取的但很困难，如果不是不可能达到正常的混凝土。吉拉尼和詹森[ 10 ]报道八混凝土连接板在密歇根建造的2001和2003之间的一般表现良好时，精心设计和建造。在进行连接板的钢筋...

全部展开

根据以往的ACI [ 7 ]和AASHTO代码[ 8 ]，裂缝宽度应保持在330lm作为耐久性的户外暴露极限。基于水渗透试验数据（例如，[ 9 ]），混凝土裂缝渗透率低于100lm有相同的系数作为声混凝土。这种严格的要求是可取的但很困难，如果不是不可能达到正常的混凝土。吉拉尼和詹森[ 10 ]报道八混凝土连接板在密歇根建造的2001和2003之间的一般表现良好时，精心设计和建造。在进行连接板的钢筋数量不足，250–500lm裂缝宽度被发现。

收起