混凝土脆性评价新方法—断裂石子面积分数法

New concrete brittleness evaluating method-fractured aggregate area ratio method

以混凝土断面面积比和作者提出的一种新方法-断裂石子面积分数法作为评价混凝土脆性的手段,研究了混凝土强度等级和养护龄期对脆性的影响。结果表明:随着混凝土强度等级的提高和养护龄期的延长,混凝土断面面积比呈降低趋势而断裂石子面积分数呈增长趋势,即混凝土的脆性增大;同时,相对于断面面积比方法,断裂石子面积分数法具有更好的适用性。

Using fracture surface area ratio（FSAR）and fractured aggregate area ratio（FAAR）methods,brittleness of concrete with different strength grade and curing age was tested.Research results show that along with the increment of strength grade and curing age,the FSAR value decreases and FAAR value increases,manifesting the increment of brittleness.Meanwhile,comparing with FSAR method,FAAR method has high applicability.