Based on the chord-length density functions from the field of statistical physics, this contribution introduces a quantitative approach to estimate the distribution of cement paste thickness between neighboring aggregate grains in cementitious composites.

Finite element analysis of direct-reverse superplastic bulging process for thickness distribution controlling;

Certain sample's thickness distribution on both sides of facture is unsymmetrical.

The effects of strain-rate sensitivity (value m),the height of the die (value H) and the inclination of the die (value α) on the uniformity in the thickness distribution of superplastic specimen have been studied.

The slump of fresh concrete depends on three parameters——nominal water-cement ratio of concrete,average paste thickness of aggregates and fly ash-binder ratio.

Based on the calculation methods of nominal water-cement ratio of mortar and average paste thickness of standard sand provided by authors, the nonlinear relation between fluidity of mortar and nominal water-cement ratio of mortar, average paste thickness of standard sand, fly ash-binder ratio was established by using artificial neural network(ANN).

Taking concrete cost as an optimization aim,ensuring the concrete slump,28d compressive strength and chloride ion diffusion coeffi-cient to meet the design requirements,a less paste and lower-cost concrete mix proportion can be obtained by reasonably adjusting the average paste thickness,small coarse aggregate to coarse aggregate ratio and sand fraction.