Environmentally-friendly self-compacting concrete for rehabilitation of concrete structures

2008 ◽  
pp. 419-424
Keyword(s):  
Concrete Structures ◽  
Environmentally Friendly ◽  
Self Compacting Concrete

Experience of Using Self-Compacting Concrete Mixes in Transport Construction

2020 ◽  
Vol 992 ◽  
pp. 135-142
Author(s):  
I. Pulyaev ◽  
S. Pulyaev
Keyword(s):  
European Union ◽  
Reinforced Concrete ◽  
Concrete Structures ◽  
Tunnel Construction ◽  
Reinforced Concrete Structures ◽  
Use Of Self ◽  
The European Union ◽  
Self Compacting Concrete ◽  
Concrete Mixtures ◽  
The Creation

The creation of self-compacting concrete (SCC) is associated with the introduction of plasticizing additives based on polycarboxylate esters (PCE). The first patent for a group of substances proposed for use as superplasticizers for concrete, was declared in the early 80-ies of the last century in Japan. In the mid 90-ies superplasticizers based on esters of polycarboxylates began to be used in Europe. In Russia, the use of self-compacting concrete began much later, and in bridge and tunnel construction almost a few years ago. Currently, in the European Union, 70-80% of reinforced concrete structures are made or erected from self-compacting concrete mixtures, and concrete is commonly called self-compacting. In Russia, such concretes are sometimes called self-leveling. The volume of their use is still small.

Application of Self-Compacting Concrete (SCC) in the Execution of Reservoir of Water

2013 ◽  
Vol 756-759 ◽  
pp. 121-123
Author(s):  
Millena Bertolini Galzerano ◽  
Letícia Torres Bressan ◽  
Rosa Cristina Cecche Lintz ◽  
Lubienska Cristina Lucas Jaquiê Ribeiro ◽  
Marta Siviero Guilherme Pires ◽  
...  
Keyword(s):  
Water Treatment ◽  
Concrete Structures ◽  
Structural Elements ◽  
Self Compacting Concrete ◽  
Building Process ◽  
Water Treatment Station

Currently, the SCC is already used in several countries and is considered a breakthrough in the building process of concrete structures, as it increases productivity, reduces the demand for labor, work in time of concreting and improves the quality of the concrete and the environment work. Innumerous investigations on SCC [,[,[,[ have been developing in order to know their behavior, improve their properties and applicability in different structural elements. This paper presents the implementation of the SCC in the execution of the base of the waters reservoir, in water treatment station.

scholarly journals Simulation of Crack Propagation in Some Self-Compacting Concrete Structures and Determination of Their Strength and Ductility Performances

2020 ◽  
Vol 8 (6) ◽  
pp. 763-775
Keyword(s):  
Crack Propagation ◽  
Peak Load ◽  
Concrete Structures ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Base Shear ◽  
Self Compacting Concrete ◽  
Band Theory ◽  
Testing Procedures ◽  
Strength And Ductility

A study on the crack propagation, strength and ductility performances of some self-compacting concrete (SCC) structures with and without steel fibers can be made through experiments. But testing is laborious. For large structure like dam, testing is impossible. Sometimes, there could be insufficient laboratory facilities. Under such circumstances, the non-linear analysis of concrete structures became a novel design tool. It employs the power of computer simulation using finite element method (FEM) based software to support the structural engineers. The ATENA software uses smeared crack approach and is based on the Bazant’s crack band theory. The experimental total fracture energies of both SCC and steel fiber reinforced SCC (Steel fibers of length 25mm@ 0.6% by volume of mix) beams of strength M50 determined by RILEM’s work of fracture method, corresponding material properties and tension softening behavior are used as input data in the software. The simulated load-deflection/CMOD curve could be used to access the strength and ductility performances of the structures. The strength is identified by peak load and ductility by extension of tail end of this curve beyond yield load. Hence, this paper presents an appropriate methodology to determine the performances by simulation. Ductility is the desired property required for structures during earthquake. This can be improved by increasing the main steel reinforcement, incorporate fiber reinforced plastic (FRP) and steel tubes to impart it. But this could be uneconomical. In such cases, it is to be investigated that ductility can be improved by incorporating steel fibers of appropriate aspect ratio and volume in the mix. The ductility ratio (µ) determined from the load-deflection/CMOD curves is further used to evaluate the response reduction factor(R) by an empirical formula as established in earlier investigation. The R used in base shear formula of IS 1893(Part-I)-2002 code considers the ductility property of the structures that are subjected to lateral base shear during earthquake. Thus this study is carried out to identify the usefulness of simulation technique which is a new and robust tool to assess these performances of the structures using ATENA software that avoid the tedious testing procedures. This study investigates the influence of steel fibers in SFRSCC structures to improve their strength and ductility performances compared to SCC structures.

scholarly journals Effect of addition JORPHOS to Self-Compacting Concrete for Chloride Penetration

2016 ◽  
Vol 5 (2) ◽  
pp. 1
Author(s):  
Mahmoud B. Alhasanat ◽  
Arabi N. S. Al Qadi ◽  
Loai A. Al Tarabulsi ◽  
Omar A. Al khashman
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Chloride Penetration ◽  
Harsh Environments ◽  
Reinforced Concrete Structures ◽  
Permeability Test ◽  
Self Compacting Concrete ◽  
Chloride Permeability ◽  
Maintenance And Repair ◽  
Repair Costs

<p class="1Body">Reinforced concrete structures are exposed to harsh environments, yet they are often expected to last with little or no repair or maintenance for long periods of time (often 100 years or more). For this reason, a durable structure needs to be produced. In addition, bridge reinforced concrete suffering from attacks of chloride penetration that cause corrosion of the steel in the reinforcement concrete that leads to reduction in strength and serviceability cracking, which cause further repair and rehabilitation for the structure and greater maintenance and repair costs. This research focuses on self-compacting concrete with Jordanian Phosphate (JORPHOS) as a filler. The permeability for different percentages of JORPHOS were tested by using Rapid Chloride Permeability Test (RCPT). It was concluded that the addition of different percentages of JORPHOS minimizes chloride penetration in concrete.</p>

scholarly journals A Numerical Analysis of the Resistance and Stiffness of the Aluminium and Concrete Composite Beam

2015 ◽  
Vol 15 (4) ◽  
pp. 99-112
Author(s):  
Łukasz Polus ◽  
Maciej Szumigała
Keyword(s):  
Numerical Analysis ◽  
Composite Beam ◽  
Composite Structures ◽  
Concrete Beam ◽  
Concrete Structures ◽  
Environmentally Friendly ◽  
Sustainable Buildings ◽  
Corrosion Resistant

Abstract In this paper a numerical analysis of the resistance and stiffness of the aluminium and concrete composite beam is presented. Composite aluminium and concrete structures are quite new and they have not been thoroughly tested. Composite structures have a lot of advantages. The composite aluminium and concrete beam is more corrosion-resistant, fire-resistant and stiff than the aluminium beam. The contemporary idea of sustainable buildings relies on new solutions which are more environmentally friendly. Aluminium is lighter and more resistant to corrosion than steel, which is often used in composite structures.

Sign in / Sign up

Export Citation Format

Share Document