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E-book Active Rheology Control of Cementitious Materials

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Penilaian

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Traditional concrete has a limited fluidity and needs to be actively compacted. Its performance has now been scientifically surpassed by highly technological mixtures based on multiple blends of powders combined with specially designed admixtures, showing rheological properties that make the fresh material self-compacting [1]. In spite of its many advantages (reduced energy consumption, less noise, less vibration, etc.), more than three decades after its introduction, self-compacting concrete (SCC) still only gained a very low market share. While in many countries the share of SCC in precast industry has been rising to levels of 20 to 30%, the market share in ready-mix industry remains at below 3 to 5% in most European countries. The excellent rheological properties of SCC have not been sufficiently translated into new production opportunities, as the traditional production processes do not fully match the potential of the new material. Problems occur with high pumping pressures, leaking of formworks and excessive formwork pressures. As local traditions often prevail over new scientific concepts and technologies, current production processes do not take full profit of the rheological potential of fresh cementitious materials, and are still very largely labour-driven and very sensitive to the human factor.Within the European Research Council (ERC) Advanced Grant project ‘SmartCast’, awarded to Prof. Geert De Schutter, and running between 2016 and 2022, a new concrete casting concept was developed, which could lift the concrete industry (both precast and on-site) to a higher quality level and transform it into a modern and highly technological industry. This new concept, called Active Rheology Control (ARC) and also including Active Stiffening Control (ASC), enables an adjustment of the flowability of the fresh cementitious material while processing, and thus post-mixing. The SmartCast concept is based on two different routes. A first route is based on newly developed switchable superplasticizers, applying the concept of responsive polymers. A second route is based on available mineral particles that show a response to an external trigger signal, for example, magnetic fields. Combining the new admixture technology and/or the triggerable mineral particles with an external trigger signal enables active control of the desired rheological behaviour of the fresh cementitious material. While the principal goal of the project was to fundamentally upgrade classical formwork-based production methods, including pumping, the obtained control concepts can also be applied to other production methods, for example, three-dimensional (3D) concrete printing. This book reports the new ARC and ASC concepts as developed within the ERC Advanced Grant Project SmartCast.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

620.1 DES a

Penerbit

London : Taylor & Francis., 2023

Deskripsi Fisik

299 hlm

Bahasa

English

ISBN/ISSN

9781003289463

Klasifikasi

620.1

Tipe Isi

text

Tipe Media

computer

Tipe Pembawa

online resource

Edisi

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Subjek

Engineering Mechanics

Info Detail Spesifik

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Pernyataan Tanggungjawab

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Versi lain/terkait

Lampiran Berkas

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