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2013

Construction Engineering

Self-compacting concrete

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Full-Text Articles in Architecture

Efectul Confinării Asupra Conlucrării Betonului Autocompactant Cu Armătura, Marian Sabau Aug 2013

Efectul Confinării Asupra Conlucrării Betonului Autocompactant Cu Armătura, Marian Sabau

Marian Sabau

Prezenta lucrare aduce contribuții legate de fenomenul de aderenţă dintre betonul autocompactant şi armătură. Principalul obiectiv al programului experimental a fost studierea fenomenului de aderenţă dintre betonul autocompactant şi barele de armătură, mai precis a efectului confinării betonului cu armătură transversală, pentru validarea sau îmbunătăţirea modelelor teoretice existente.

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Experimental Determination On Bond Strength Of Rebar In Self-Compacting Concrete, Marian Sabau, Traian Onet, Ana Ioana Petean Jun 2013

Experimental Determination On Bond Strength Of Rebar In Self-Compacting Concrete, Marian Sabau, Traian Onet, Ana Ioana Petean

Marian Sabau

Experimental results of the local bond stress-slip relationship of deformed reinforcing bars embedded in confined self-compacting concrete are presented. A total of 58 pull-out specimens were tested. Each one of these specimens simulated the confined region of a beam-column joint. The main analyzed parameters were the concrete type, the confining reinforcement, the reinforcement bar diameter, the embedded length of bars. The results showed that in order to ensure that the bond failure is caused by pull-out, a restraining reinforcement must be provided. The paper also presents a comparison between self-compacting concrete (SCC) and normally vibrated concrete (NVC).

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Economia De Energie Realizată Prin Folosirea Betonului Autocompactant, Marian Sabau, Traian Onet, Ana Ioana Petean, Letitia Nadasan May 2013

Economia De Energie Realizată Prin Folosirea Betonului Autocompactant, Marian Sabau, Traian Onet, Ana Ioana Petean, Letitia Nadasan

Marian Sabau

Betonul autocompactant (BAC) este un beton inovativ care nu necesită vibrare în momentul punerii în operă, acesta fiind capabil să curgă sub propia greutate, poate să umple complet cofrajele şi să ajungă la o compactare corespunzătoare fără a fi nevoie de o compactare mecanică. Această lucrare prezintă avantajele acestui nou tip de beton, materialele constituente, metodele de testare, precum şi dezavantajele care le aduce compactarea prin vibrare asupra betonului obişnuit. Eliminarea vibrării are de asemenea efecte benefice asupra condițiilor de muncă în procesul de producere al betonului.

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Effect Of Confinement On Bond Strength Between Self-Compacting Concrete And Reinforcement, Marian Sabau, Traian Onet, Ana Ioana Petean Jan 2013

Effect Of Confinement On Bond Strength Between Self-Compacting Concrete And Reinforcement, Marian Sabau, Traian Onet, Ana Ioana Petean

Marian Sabau

Slippage of the beam reinforcement at beam–column connections is an important cause of damage of reinforced frames under static and dynamic loads. This paper presents the effects of confinement in self-compacting concrete (SCC), on the local bond stress vs. slip characteristics of deformed bars in reinforced concrete joints. Prismatic specimens with deformed steel bars embedded for a fixed length equal to three and five equivalent diameters were tested under monotonic loading. The specimens represented the confined region of a beam–column connection. The obtained results indicated that as far as the bond splitting cracks are restrained by reinforcing bars crossing these …

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