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材料的硬度和强度不是同一个概念。同一种匀质材料的硬度和强度之间有一定的相关性,而不同材料的硬度和强度之间不能建立相关的关系;同样水胶比的砂浆和混凝土是不同的材料,砂浆的硬度最多只可能与砂浆强度有一定的联系,而相同水胶比的砂浆强度和混凝土强度的关系却依照浆骨比和砂率的不同而不同;混凝土碳化层和该混凝土更是不同的材料,混凝土碳化层的硬度和内部混凝土的强度没有关系,再基于碳化层的硬度引进“折减系数”来推算混凝土的强度,在概念上是错误的。
Material hardness and strength are not the same concept. The same homogeneous material hardness and strength of a certain correlation between different materials and hardness and strength can not be established between the relationship; the same water-cement ratio mortar and concrete are different materials, the hardness of the mortar the most May have a certain relationship with the mortar strength, and the same water cement ratio mortar strength and concrete strength in accordance with the ratio of mortar and sand rate varies; concrete carbonization and the concrete is even more different materials, concrete carbonization Of the hardness of the internal concrete has nothing to do with the strength of the concrete, based on the hardness of the carbide layer introduced “reduction factor ” to calculate the strength of the concrete, the concept is wrong.