Anti-crack cement-based material early-stage micropore structure prediction model and application thereof

Abstract

The invention discloses an anti-crack cement-based material early-stage micropore structure prediction model, in the formula shown in the specification, V (d) represents the total pore volume (m < 3 >) of which the pore diameter is greater than d, and A, B and C are parameters related to the age t and parameters reflecting the swelling agent doping amount () and the zeolite doping amount (), respectively. The prediction model can well characterize the change development law of the cumulative pore volume (V (d)) of the cement-based material along with the age (t), the zeolite mixing amount () and the expanding agent mixing amount (). The anti-crack cement-based material early-stage micropore structure prediction model can be used for cement-based material early-stage performance research ofscientific research institutions and design and construction units.

Description

technical field [0001] The invention relates to a component method of an early microporous structure prediction model of an anti-cracking cement-based material and its application, belonging to the field of concrete construction. Background technique [0002] Concrete is a porous structure with internal pore sizes ranging from a few nanometers to millimeters. The pore structure of cement-based materials has an important effect on its own physical mechanics and volume deformation. The pore structure is an important factor affecting the permeability of concrete, and the strength and durability of concrete are also directly related to the porosity of concrete. The higher the porosity, the better the permeability of concrete, but the poorer the bearing capacity of concrete. Appropriately increasing the amount of mineral admixtures can optimize the pore structure of concrete and improve its durability. Gel pores less than 10nm and transition pores of 10-100nm are relatively be...

AI Technical Summary

Problems solved by technology

[0016] The aforementioned porosity detection method not only has high requirements on the instrument, but also causes damage to the interior of the pore structure, which affects the accuracy of the test results

The test of the pore structure of concrete mixed with zeolite and expansion agent often needs to be sampled separately at specific ages (3 days, 7 days, 14 days, 28 days), and for different amounts of zeolite and expansion agent, the internal pore structure is more complex. Unpredictable

The traditional test method is time-consuming and labor-intensive, the test cost is high, and the error of the measured pore structure results is relatively large

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