Concept

Dental cement

Publications associées (119)

The Atomic-Level Structure of Cementitious Calcium Silicate Hydrate

David Lyndon Emsley, Karen Scrivener, Paul Bowen, Aaron James Rossini, Albert Hofstetter, Brennan James Walder, Aslam Kunhi Mohamed, Abhishek Kumar, Bhuvanesh Srinivasan

Efforts to tune the bulk physical properties of concrete are hindered by a lack of knowledge related to the atomic-level structure and growth of calcium silicate hydrate phases, which form about 50-60% by volume of cement paste. Here we describe the first ...

2017

The Search for Affordable Cement and Concrete in the 18th and 19th Century

Salvatore Aprea

At the turn of the 19th century, the production and use of concrete were limited by the unavailability of raw materials to produce good cement in several places. From that time onwards, the progress of chemistry and a number of empirical discoveries opened ...

Springer2017

Outcomes of the RILEM round robin on degree of reaction of slag and fly ash in blended cements

Karen Scrivener, Barbara Lothenbach, Mohsen Ben Haha, Pawel Tadeusz Durdzinski

Working group 2 of the RILEM TC 238-SCM undertook a comparison of laboratories and techniques for the quantification of the degree of reaction of supplementary cementitious materials in blended cements. A common set of binary pastes of Portland cement with ...

Springer Verlag2017

Multi-Scale Modeling of the Alkali-Silica Reaction in Concrete

Aurelia Isabel Cuba Ramos

The alkali-silica reaction (ASR) is one of the most common causes of internal concrete degradation. This chemical reaction occurs between the amorphous silica contained inside the aggregates, and the alkalis of the cement pore solution. During the reaction ...

EPFL2017

Utilisation of alkali activated glass powder in binary mixtures with Portland cement, slag, fly ash and hydrated lime

Hamed Maraghechi

This paper evaluates feasibility of alkali activation to boost the reactivity and cementitious properties of recycled glass powder ( GP), when it is used in four different binary mixtures with ordinary Portland cement ( OPC), alkali activated slag or fly a ...

Springer2017

Monitoring Fresh State Behavior of Fiber Reinforced Cementitious Composites (FRCCs) : A Non-Destructive, Non-Intrusive and Full Field Image Based Technique

Ardalan Hosseini

The results obtained from many previous studies highlight the need for further investigation of the strong connection existing between fresh state and hardened state performance of fiber reinforced concrete. A comprehensive experimental study was conducted ...

2016

Hydration of multi-component cements containing cement clinker, slag, calcareous fly ash and limestone

Pawel Tadeusz Durdzinski

Calcareous fly ashes are high-potential reactive supplementary cementitious materials, which present an interesting alternative to slowly reacting siliceous fly ashes and to slags, which availability is more and more limited. Themain factor against an accu ...

EPFL2016

Microstructural Modeling of Early-Age Creep in Hydrating Cement Paste

Karen Scrivener, Shashank Bishnoi

This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dime ...

Asce-Amer Soc Civil Engineers2016

An Alternative to Conventional Measurement Techniques for Evaluating Crack Propagations and Crack Width Openings

Ardalan Hosseini

In the scope of this study, the capability of particle image velocimetry (PIV) method to monitor cracking behavior of cement-based materials was investigated. Load-crack opening width curves for beam specimens were obtained both from conventional measureme ...

2016

Influence of silica fume on the microstructure of cement pastes: New insights from H-1 NMR relaxometry

Karen Scrivener, Arnaud Charles Albert Muller

H-1 NMR has been used to characterise white Portland cement paste incorporating 10 wt.% of silica fume. Samples were measured sealed throughout the hydration without sample drying. Paste compositions and C-S-H characteristics are calculated based on H-1 NM ...

Pergamon-Elsevier Science Ltd2015

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