Ordinary clean cement paste early-age temperature conductivity coefficient prediction method based on multi-scale model

Abstract

The invention discloses an ordinary clean cement paste of early age temperature conductivity coefficient prediction method based on a multi-scale model. The ordinary clean cement paste early-age temperature conductivity coefficient prediction method based on the multi-scale model includes that heterogeneous and multi-scale division is conducted according to a micro-structure and composition of ordinary clean cement paste in an early age, a typical phase is contained at each scale, volume percentages of different ages and phases are calculated, and temperature conductivity coefficients of the clean cement paste in the early age are calculated and obtained through a generalized self-consistent method according to parameters of volume percentage of each phase, temperature conductivity coefficients and the like at each scale. Influences of clean cement paste early-age micro-structure formation and evolution, and performance of component materials on clean cement paste macroscopic temperature conductivity coefficients are considered, influence factors considered are comprehensive and reasonable, and the ordinary clean cement paste early-age temperature conductivity coefficient prediction method based on the multi-scale model is simple in form and convenient to use. The temperature conductivity coefficients of the clean cement paste in the early age with different water-cement ratios, different kinds of cement, and different curing temperatures can be predicted more correctly according to a prediction model built with the ordinary clean cement paste early-age temperature conductivity coefficient prediction method based on the multi-scale model.

Description

technical field [0001] The invention relates to a multi-scale model-based method for predicting the early-age thermal conductivity of ordinary cement paste, which belongs to the technical field of cement-based materials. Background technique [0002] The problems involved in the early cracking of cement-based material structures are comprehensive and complex, covering all aspects of early thermal, mechanical and deformation properties of cement-based materials. Researchers at home and abroad have conducted a large number of experimental studies on the early macroscopic properties of cement-based materials, trying to clarify the early cracking mechanism of cement-based materials, the law of early performance changes and the selection of technical parameters. Among them, the development and change process of the thermal conductivity of cement-based materials in the early age with age is one of the hot issues concerned by researchers, and it is also an important parameter neces...

AI Technical Summary

Problems solved by technology

The thermal conductivity of cement-based materials changes with the change of its mix ratio, etc., and changes with the development of age, and the test measurement is difficult. The existing research results are mainly in the measurement of the thermal conductivity of cement-based materials in the hardening stage. , there is a lack of systematic research on the thermal conductivity of cement-based materials. At the same time, due to reasons such as raw materials, mix ratios, environmental conditions, test equipment and test methods, and test personnel's operating techniques, the thermal parameters given are relatively discrete.

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