Diversifying two-stage mixing approach (TSMA) for recycled aggregate concrete: TSMAs and TSMAsc

Tam, Vivian Wing Yan; Tam, C. M.

doi:10.1016/j.conbuildmat.2007.07.024

Cited by 260 publications

(81 citation statements)

References 34 publications

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“…However, since cement particles are not small enough to penetrate and fill all microcracks, Tam and Tam [18] and Li et al [19] tried to use the same technique, but with utilising reactive micro-fillers (pozzolans) such as SF, fly ash (FA) and ground granulated blast furnace slag (GGBS). Kong et al [20] used a triple mixing method to coat RCA (derived from crushing laboratory concrete samples with strength of 40 MPa) with first a layer of either FA or GGBS and then with a layer of cement paste.…”

Section: Introductionmentioning

confidence: 99%

Strength prediction model and methods for improving recycled aggregate concrete

Younis

Pilakoutas

2013

Construction and Building Materials

180

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Section: Introductionmentioning

confidence: 99%

Strength prediction model and methods for improving recycled aggregate concrete

Younis

Pilakoutas

2013

Construction and Building Materials

180

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“…Recycled coarse aggregates can be used as a drainage material between DCE and DCI (Molineux et al, 2015;Tam and Tam, 2008). To determine the production of biogas of the landfill, some previous factors allowing the calculation of biogas valorization cost-effectiveness must be analyzed.…”

Section: Resultsmentioning

confidence: 99%

Application of inert wastes in the construction, operation and closure of landfills: Calculation tool

2017

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Waste from construction and demolition activities represents one of the highest volumes of waste in Europe. 500 million tonnes are produced throughout the whole EU every year. In some EU members like Spain, approximately 83 per cent of such waste is disposed in landfills. The remaining part is classified and processed in treatment facilities so that it can later be used as recycled aggregates in the construction sector (sand, gravel, aggregates, etc.) but without much commercial success. The aim of this study is to use recycled aggregates from inert wastes (IW) in the different phases of a landfill (construction, operation and closure) with the aid of a new computer tool called LABWASTE.14. This tool incorporates the mathematical relationship among the activities of the landfill and provides as a result the economic viability of using recycled aggregates compared to aggregates from quarries.Therefore, knowing the needs of aggregates in landfills (dams, drainage layers, covering layers, collection wells, etc.) may determine the amount of IW that could be recovered. These 2 calculations can be obtained from some of the data that is introduced (population, land physiography, etc.). Furthermore, the use of LABWASTE.14 makes it possible to reduce the demand for aggregates from quarries. IntroductionConstruction and demolition wastes (CDW) are a growing problem in many countries. They account for large part of the waste generated in cities and they are usually placed in landfills (Ekanayake and Ofori, 2004). CDW represents around 31% of all waste produced in the European Union (EU) (Fisher and Werge, 2009). It is nowadays acknowledged that the consumption of raw materials in the construction industry is a non-sustainable activity. It is thus necessary to reduce this consumption, and the volume of CDW dumped, by using this waste as a source of raw materials for the production of recycled aggregates (Rodrigues et al., 2013). In fact, in many EU countries a very limited amount of CDW is recycled, the greatest portion being deposited or used as fill material (Masood et al., 2002). However, recycling concrete waste will lead to a reduction in valuable landfill space and savings in natural resources (Tabsh and Abdeltatah, 2009). Because of this, in the EU, the strategic plans about waste include CDW. The European Action Plan on the Circular Economy includes a number of actions that will target market barriers in specific sectors or material streams, such as construction and demolition wastes as well as horizontal measures in areas such as innovation and investment (EU, 2015). All these regulations establish the minimum requirements for their production and management, in order to promote prevention, reuse, recycling and recovery. The EU Waste Framework Directive (Directive 2008/98/EC) introduces recycling and recovery targets to be achieved by 2020 for household waste (50%) and construction and 3 demolition waste (70%). Furthermore, recycling CDW makes it possible to achieve considerable savings on energy and...

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“…CO 2 curing was proposed in recent years to pre-treat recycled aggregates, which leaded to a denser structure of the recycled aggregates and, as a result, a higher strength of RC [8]. Tam proposed a special treatment method, two stage mixing approach, to improve the mechanical properties of RC [9].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on recycled concrete containing recycled fibers and organic fibers

Zhang¹,

Liu²

2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. Recycled concrete is an environmental green material for recycling construction and demolished wastes. Numerous studies performed on recycled concrete indicated that it had poor characteristics of workability, strength and durability attribute to the inferior mechanical properties of recycled aggregates. A wide range of investigations had been carried out to improve the mechanical properties of recycled concrete. For better manifesting green concepts, waste glass-fiber composite tablets, recycled PET fibers and organic sisal fibers were used in this study to enhance the mechanical properties of recycled concrete. The experimental results show that the smooth surface of composite tablets may be weak points to degrade its compressive strength. PET fibers and sisal fibers can improve the ductility of recycled concrete obviously.

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Diversifying two-stage mixing approach (TSMA) for recycled aggregate concrete: TSMAs and TSMAsc

Cited by 260 publications

References 34 publications

Strength prediction model and methods for improving recycled aggregate concrete

Strength prediction model and methods for improving recycled aggregate concrete

Application of inert wastes in the construction, operation and closure of landfills: Calculation tool

Experimental study on recycled concrete containing recycled fibers and organic fibers

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