This paper presents the development of composite silicate mass compositions based on man-made waste for production autoclave hardening products, as well results physico-chemical studies hydration products materials. The possibility, expediency and efficiency using multi-tonnage technogenic Kazakhstan in industry building materials is shown. Based conducted research, composition a burnt carbonat...

The nucleation of the C-S-H gel is a complex process, key to controlling hydration kinetics and microstructure development cement. In this paper, mechanism for crystallization step during non-classical proposed explored by atomistic simulation methods. portlandite precursor monolayers undergo chemically induced transformation condensation silicate dimmers, forming monolayers. We studied DFT nud...

A force field suite, ERICA FF has been developed for the simulation of cementitious systems. It validated structural, energetic and mechanical properties. covers species Ca, OH, sulfate, water, Si, Al, Na, K Cl. We have simulated structural properties 19 Results show that all errors are acceptable with less than 6% on length parameters 5 degrees angles. Furthermore, we suite 16 reaction enthalp...

Portland-composite cements (PCC) were prepared with partial substitution of 5 to 25% class C fly ash, obtained from East Java steam power plant. Properties the composite was evaluated, through setting time (initial and final) compressive strength (3, 7, 28 days) compared control PCC. Setting is retarded in higher ash content. The retardation highest PCC ash. Lower after 3 7 days curing for 5-25...

At the microscale, C-S-H gels from alite, or neat Portland cements, has a Ca/Si ratio close to 1.80. nanoscale, is described by defective tobermorite structure which allows maximum 1.40. There no agreement in location of extra 0.40 mol Ca(OH)2 at nanoscale. Atomistic modelling studies reported species within interlayer space. Other works point toward fine intermixing and nanoportlandite. Here, ...