渗透结晶材料对冻融循环后混凝土内部浆体结构的影响

Influence of permeated crystalline materials on cement pastes internal structure of concrete after freezing and thawing

混凝土的内部结构决定其抗冻性能。通过扫描电镜，表征和分析了渗透结晶材料对冻融前后混凝土内部硬化浆体的结构及其变化规律。结果表明，与基准混凝土比较，表面喷涂渗透结晶材料的混凝土，冻融循环前后，混凝土内部硬化浆体的裂纹宽度和数量均减少；喷涂渗透结晶材料越多，裂纹宽度和数量越少。表面喷涂渗透结晶材料有利于提高混凝土的抗冻性。

The cement internal structure of concrete determined the performance of frost resistance of concrete.By scanmng electron microscopy,cement pastes internal structure of hardeness and varition before and after freezing and thawing was in detail studied.The results show that compared with reference concrete,permeated crystalline materials concrete greatly reduces the number of cracks and its width before and after freezing and thawing. Increscent of permeated crystalline materials will decrease the crack number and width.Crystalline surface coating material can thus improve the frost resistance of concrete.