Experimental chemo-mechanics of early-age fracture properties of cement paste

Fundamentals of soil stabilization

“…The chemical reactions during the hydration procedure include, but are not limited to, some or all of the reactions listed below [65].…”

A phase-field approach to fracture coupled with diffusion

“…(2.19) and the chosen length parameter ℓ, the tensile strength is calculated as 1.08 N/mm 2 , which has a reasonable order of magnitude for cement paste (see e.g. the tensile strength of 3.91 N/mm 2 measured by Hoover and Ulm [66]). Fig.…”

“…(2.19), from the knowledge of the tensile strength σ c and the fracture energy G c of the given material, it is possible to calculate the length parameter ℓ, which in turn needs to be resolved through an appropriately fine mesh. Here, we employ the experimental tensile strength of the cement paste in [66] (σ c = 3.91 N/mm 2 ) along with the other mechanical properties listed in Table 4, and by using Eq. (2.19) we compute the length parameter ℓ as 0.763 mm.…”

Early-Age Stress and Pressure Developments in a Wellbore Cement Liner: Application to Eccentric Geometries

“…Wang et al [26], for instance, analyzed crack tunneling by loading the inner surface of the steel casing, and Petersen and Ulm [27] analyzed the early-age radial fracture in a cement sheath. A fracture design of setting cement requires the energy release rate G to be compared to the fracture energy G cr , for which the rate of evolution depends on the hydration degree as dG cr =dn $ 1=n [28] and we expect the interfacial fracture energy along SC and RC to show a similar trend.…”

“…8 shows the distribution of work done along SC and RC to reverse a microannulus, i.e., the integrands written in Eq. (28), which have been normalized with respect to the uniform distribution of the concentric geometry. 2 While the $10% increase in work done along the thicker portion of the annulus along RC (Fig.…”