Discrete lattice fracture modelling of hydrated cement paste under uniaxial compression at micro-scale

Abstract

h i g h l i g h t sCompressive failure of hydrated cement paste at the micro-scale was simulated. Failure behaviour of various specimens were investigated. Boundary restraint effect is more significant for specimens with a low slenderness. The boundary condition has negligible effect on the Young's modulus.

Size Effect on Compressive Strength of Foamed Concrete: Experimental and Numerical Studies

“…When the slenderness ratio was 2, the measured compressive strength decreased. This phenomenon was also observed in HCP [67] and concrete [68]. It was attributed to the effect of the end restraint due to the friction between the rigid steel plates and specimen.…”

“…Because the boundary conditions for loading remain the same, the difference in the main crack can be attributed to the variation in the air void structure. In contrast to cement paste [67] and concrete [71] in which main cracks are usually identified, the crack pattern in foamed concrete exhibits widespread microcracks in addition to several main cracks. This observation is due to the complex internal air void structure of foamed concrete.…”

Review and Outlook on Fracturing Technology and Mechanism of Hydrate-Bearing Sediments

“…The researchers investigated the physical, acoustic, and thermodynamic behaviors of hydrates by conducting experiments on hydrate formation, phase transformation, and cementation damage, ,− which provided important experimental data for macroscopic mechanical characterization. − On this basis, the researchers innovated the traditional triaxial apparatus and designed a new type of hydraulic fracturing triaxial device to conduct experiments on fluid injection (Figure ). …”