self-compacting concrete mixtures which contain air-entraining agents and silica fumes. Two series of self-compacting concrete mixes have been prepared. In the first series, fine and coarse recycled mixtures respectively with 50% and replacement with air entraining agent were used. In the
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Moreover, in the case that a high masonry resistance to external actions is one of the design requirements, these mortars, in particular those containing recycled aggregate could be of benefit in terms of mechanical performance and hence durability. 4 SELF-COMPACTING CONCRETE CONTAINING RUBBLE POWDER 4.1 Feasibility and sustainability A further ...
Self-compacting concrete (SCC) with various percentages of RCA as partial replacement of natural aggregates (NA) (0%, 25%, ... concrete rubble. The utilization of Recycled Concrete Aggregates (RCA) is a good solution to decrease the ... powder itself. The SCC mix containing GGBS exhibiting
7/7/2015· Figure 2Masonry model and maximum values of the mortar-brick bond strength. Self-Compacting Concrete Containing Rubble Powder Finally, a third experimental step was carried out concerning self-compacting concrete by using the dust produced during the rubble processing as a filler for manufacturing selfcompacting concrete.
Concrete floors lying on ground containing pyrite are also at risk. ... Sweden and France developed concretes that are self-compacting, ... concrete recycling is a common method of disposing of the rubble. Concrete debris was once routinely shipped to landfills for disposal, but recycling has a number of benefits that have made it a more ...
In the present study, the effects of recycled concrete aggregates as a partial replacement for fine (by 50%) and coarse aggregates (by ) were examined in the self-compacting concrete mixtures which contain air-entraining agents and silica fumes. Two series of self-compacting concrete …
Results obtained showed that an optimization of self-compacting concrete mixture seems to be achievable by the simultaneous use of rubble powder and …
The invention relates to infrastructure construction materials, particularly to a concrete composition. A vibration-free self-compacting concrete composition is formed by mixing of the following components by weight: 100 parts of cement, 10-30 parts of fly ash, 20-50 parts of limestone powder, 0.8-2 parts of a polycarboxylic acid water reducer, 250-350 parts of machine-made sand obtained by ...
Sustainable Waste Management and Recycling: Construction Demolition Waste; CONCRETE AND MORTAR PERFORMANCE BY USING RECYCLED AGGREGATES ...
Today, the use of recycled aggregates as a substitute for a part of the natural aggregates in concrete production is increasing. This approach is essential because the resources for natural aggregates are decreasing in the world. In the present study, the effects of recycled concrete aggregates as a partial replacement for fine (by 50%) and coarse aggregates (by ) were examined in the self ...
Abstract The aim of the present work is to investigate the flexural behavior of self-compacting concrete reinforced with straight and hooked end steel fibers at levels of 0.5%, 1.0% and 1.5% and compare it to normally vibrated concrete (NVC). The laboratory tests were determined according to RILEM TC 162-TDF recommendation.
Self-compacting concrete (SCC) is defined as sophisticated version of the high performance concrete. It was discovered in Japan, at the University of Tokyo in early of 1980s. The purpose was to produce durable concrete that is used in heavily reinforced and complicated concrete structures.
The invention discloses a self-compacting concrete for prestressed girders with ultra-long span. The self-compacting concrete comprises the following parts of components by weight: 180-210KG of water; 350-400KG of Portland cement; 30-35KG of a concrete admixture; 700-800KG of fine aggregates which are of medium coarse sand; 900-1000KG of coarse aggregates which are of crushed stone with ...
Microsilica Quarry Dust Powder Corrosion. quarry dust replacement in sand in self compacting . microsilica quarry dust powder corrosion. journals for replacement of sand by quarry dust in concrete of self-compacting concrete incorporating quarry dust powder silica fume and fly Get More Get Price And Support Online 94 Densified Silica FumeSilica Fume for Sale .
1/31/2012· c) Combination type self-compacting concrete: This type is proportioned so as to obtain self-compactability mainly by reducing the water powder ratio, as in the powder type, and a viscosity modifying admixture is added to reduce the quality fluctuations of the fresh concrete due to the variation of the surface moisture content of the aggregates ...
1. Introduction. The development of self-compacting concrete is considered as a milestone achievement in concrete technology due to several advantages: high performance of both fresh and hardened concrete (high flowability and segregation resistance, low porosity, high strength and durability, etc.); wider applications (components and structures with complicated shape and highly congested by ...
Self-compacting concrete is a flowing concrete mixture that is able to consolidate under its own weight. The highly fluid nature of SCC makes it suitable for placing in difficult conditions and in sections with congested reinforcement. Use of SCC can also help minimize hearing-related damages on the worksite that are induced by vibration of ...
The utilisation of recycled concrete aggregate (RCA) in Self-Compacting Concrete (SCC) has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. However, to date limited research exists exploring the use of coarse RCA in SCC. The work presented in this paper seeks to build on the existing knowledge in this area by ...
Either limestone powder or fly ash or recycled aggregate powder (that is a powder obtained from the rubble recycling process) were used as mineral addition, in order to assure adequate rheological properties, in terms of cohesiveness, in the self-compacting concretes.
rubble in combination with cementitious additions in concrete ... Self compacting concrete is an innovative concrete that does ... Yazıcı (2016), Rheological and fresh properties of self- compacting concretes containing coarse and fine recycled concrete aggregates, Journal of construction ...
improves workability. The test result showed that an optimization of self-compacting concrete mixture seems to be achievable by the simultaneous use of rubble powder and coarse recycled aggregate with improved fresh concrete performance and unchanged concrete mechanical strength [corinaldesi 2011].
High rise building construction methods pdf. The types of concrete considered are high-resistance concrete up to C80, self- The types of concrete considered are high-resistance concrete up to C80, self- compacting concrete, precast and in situ concrete, reinforced or prestressed concrete, as well as normal weight construction phase of a high-rise building once this has attained a certain
Corinaldesi et al. 5 considered RAs and industrial by-products (rubble powder, fly ash and limestone powder) in self-compacting concrete (SCC) and proved satisfactory compressive strengths, except ...
pozzolana + marble powder), apparently turns to be a suitable strength [Belaidi, A.S.E. (2012)]. Potential combination of SCC is proved through the test result that exhibited an optimization of self-compacting concrete mixture potentially durable by the concurrent deployment of rubble powder and coarse recycled aggregate with improved fresh