Rheological requirements for printable concretes

Steady and transient flow behaviour of fresh cement pastes

Estimating rheological properties of cement pastes using various rheological models for different test geometry, gap and surface friction

https://hal.archives-ouvertes.fr/hal-00542980/document

Cellulose ethers influence on water retention and consistency in cement-based mortars

The hard, strong and durable cement−based product required by the user is only achieved following a period of plasticity but the attention paid to its fresh properties is small, despite the far−reaching effects of inadequate fresh performance. Pumping, spreading, moulding and compaction all depend on rheology and thanks to an increasingly scientific approach it is becoming possible to predict fresh properties, design and select materials and model processes to achieve the required performance. Rheology is now seriously considered by users, rather than being seen as an inconvenient and rather specialised branch of cement science.

/pdf/the-rheology-of-fresh-cement-and-concrete-a-review-3in0vxdd7j.pdf

The rheology of fresh cement and concrete - a review

Analytical models for estimating yield stress of high-performance pseudoplastic grout

The knowledge of yield stress and plastic viscosity of cement-based materials is of special interest in various applications, including consolidation grouting, post-tensioning systems, and for numerical simulations. These rheological parameters are generally estimated from the shear stress-shear rate data using an empirical model. Highly pseudoplastic systems may not be adequately modeled using flow models typically used for conventional grouts. This paper summarizes the results of a study undertaken to evaluate the applicability of a number of analytical models to fit experimental data obtained on cement grout. In total, 44 grouts containing silica fume replacements of 1.5%, 3%, and 5% by mass of cementitious materials, blast furnace slag substitutions of 20% and 40%, and various combinations of high-range water-reducer and viscosity-enhancing admixture were evaluated. All mixtures were prepared with 0.40 water-cementitious material ratio.

https://link.springer.com/content/pdf/10.1007/BF02481066.pdf

A Yahia

Papers

Analytical models for estimating yield stress of high-performance pseudoplastic grout

Applicability of rheological models to high-performance grouts containing supplementary cementitious materials and viscosity enhancing admixture

Experiment design to evaluate interaction of high-range water-reducer and antiwashout admixture in high-performance cement grout