Mechanical properties of colloidal calcium-silicate-hydrate gel with different gel-pore ionic solutions: A mesoscale study

Graphene oxide-incorporated cementitious composites: a thorough investigation

“…3) Gel pores, which are embedded within the calcium silicate hydrate (CSH) microstructure of cement. Almost one-third of the pore space is comprised of gel pores [6]. These pores are due to the vacancies in the principal atoms and spaces between the network of layers [7,8].…”

“…Almost one-third of the pore space is comprised of gel pores. 6 These pores are due to the vacancies in the principal atoms and spaces between the network of layers. 7,8 The porosity of concrete is directly related to the strength and durability of concrete.…”

Nanoscale Insights into the Influence of Seawater (NaCl) on the Behavior of Calcium Silicate Hydrate

“…The debonding between C-S-H layers at the atomic level, which corresponds to the debonding between C-S-H globules at the mesoscale, is one of the most noteworthy features that play an important role in the mechanical and fracture properties of C-S-H gel. , Therefore, a series of tensile loading along the z -direction was carried out on the C-S-H layered structures made of different interlayer solutions (NaCl/H 2 O = 0.00, 0.05, and 0.10) in order to investigate the role of seawater in the debonding process. First, the tensile stress ( P z ) was calculated using the following equation during the debonding process P z = ∑ k N m k v k z v k z V + ∑ k N ′ r k z f k z V where N denotes the number of atoms in the system; V denotes the system volume; m k is the mass of the k th atom; v k z is the component in the z -direction of the velocity of the k th atom; N ′ includes the atoms from the neighboring subdomains (so-called “ghost atoms”); and r k z and f k z are the components in the z -direction of the position and force of the k th atom.…”

“…The debonding between C-S-H layers at the atomic level, which corresponds to the debonding between C-S-H globules at the mesoscale, is one of the most noteworthy features that play an important role in the mechanical and fracture properties of C-S-H gel. 24,53 Therefore, a series of tensile loading along the z-direction was carried out on the C-S-H layered structures made of different interlayer solutions (NaCl/H 2 O = 0.00, 0.05, and 0.10) in order to investigate the role of seawater in the debonding process. First, the tensile stress (P z ) was calculated using the following equation during the debonding process 34…”

A century of research on calcium silicate hydrate (C–S–H): Leaping from structural characterization to nanoengineering

“…Using grand canonical Monte Carlo simulations, the nanoscale aggregation of C-S-H nanoplates of 1 nm size was calculated, which demonstrated the role of C-S-H's surface charge density on the growth modes of C-S-H. 155 The packing modes of C-S-H globules 105,156 or nanoplates 157,158 in simulation boxes containing as many as 600 000 particles have been also reported, helping to draw a relationship between C-S-H local packing and pore structure with its nanomechanical and durability properties. 159,160 More robust models also allowed the simulation of the C-S-H formation process. In commended studies, Ioannidou et al 7,161 used grand canonical Monte Carlo and MD simulations to simulate the interaction between C-S-H particles and, thereby, the gelation and densification process of the C-S-H structure (Figure 8A).…”