粗骨料表面分维的研究

Research for coarse aggregate surface area fractal

混凝土浆体用量越少,其体积稳定性越好。混凝土浆体用量与粗骨料的表面分维有关.采用所提出的试验方法,可得到粗骨料的比表面积、粗骨科表面积形状因子与体积形状因子的比值,代入理论公式可求出粗骨料表面分维.采用所提出的试验和理论相结合的方法,可以较准确得到粗骨料表面分维.研究成果可用于混凝土配合比的设计和优化.

The less paste content of concrete results in the better volume stability of concrete. The paste content of concrete has relationship with the surface area fractal of coarse aggregates. Using the proposed test methods, the specific surface area of coarse aggregates and the ratio of surface area shape factor to volume shape factor of coarse aggregates can be obtained, and the surface area fractal of coarse aggregates can be calculated by theoretical equations. Applying the method combined with test and theory, the surface area fractal of coarse aggregates can be obtained correctly, and can be used in the design and optimization of mix proportion of concrete.