2022-1-1 The use of recycled concrete aggregate adversely affects the durability properties of concrete. Recycled concrete is characterized by increased water absorption and permeability
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2021-1-1 OPC of 53 grade conforming to IS12269 is used with 30% replaced by GGBS in order to increase the setting time of concrete and noting the delay on final setting time. Crushed
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2022-3-7 concrete containing fly ash, slag and recycled concrete aggregate. Concrete mixes containing 50% replacement of cementIJERT slag gave the best results. [2] A.H.L.Swaroop et
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2012-10-1 Construction debris from construction and demolition (C&D) work constitutes a large proportion of solid waste, as shown in Table 1.Among various types of construction materials,
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2013-9-1 The calculated activation energy was 42 kJ/mol. Dissolution of recycled concrete aggregate into an NH 4 HSO 4 solution, as for steel slag, produced precipitated CaSO 4, while
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2022-4-22 Steel Slag and Recycled Concrete Aggregates: Replacing Quarries to Supply Sustainable Materials for the Asphalt Paving Industry April 2022 Sustainability 14(9):5022
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2022-4-22 Six different asphalt mixtures containing three types of aggregate (dacite, recycled concrete, and steel slag) were produced to obtain Marshall specimens and determine the
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In addition, 7.4 Mta of steelworks slag was produced. Fig. 9 shows the amounts recovered. It can be seen that only granulated blast furnace slag (GBFS) can be used as a cement additive. For
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Recycled concrete and masonry (RCM) aggregate can be described as graded aggregate produced from sorted and clean waste concrete and masonry. The RCM material may contain
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2019-10-16 Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete.
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2019-4-1 This paper examines the properties of pervious concrete made with recycled concrete aggregates (RCA) and slag. RCA replaced natural aggregates at varying percentages of 0, 50, and 100%, while slag
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In addition, 7.4 Mta of steelworks slag was produced. Fig. 9 shows the amounts recovered. It can be seen that only granulated blast furnace slag (GBFS) can be used as a cement additive. For ready-mixed concrete and other types of concrete, both normal blast furnace slag and steelworks slag are used with respective totals of 38.7 % and 20.3 %.
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2020-5-1 That is, concretes made with 100% RA, 30% fly ash and 10% silica fume showed even better electrochemical properties than the control concrete, especially at higher ages due to the pozzolanic effect.
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2021-10-28 Concrete-batching, transport, and placement activities were all found to contribute very small amounts of CO2 to total concrete emissions.The CO2 emissions generated by typical normal strength
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2017-5-22 In this study recycled coarse aggregates obtained by crushed concrete were used for concrete production. Four different recycled aggregate concretes were produced; made with 0%, 25%, 50% and 100%
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2019-10-16 Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are dumped in landfill. These
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2019-12-31 Using recycled coarse aggregate (RCA) to replace natural pebbles and using lithium slag (LS) from industrial waste to replace cement in order to improve the mechanical properties of concrete and solve environmental problems. In this study, the effects of different substitution rates of RCA (0, 30%, 50%, and 70%) and different LS contents (0, 10%, 15%,
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2019-7-1 The new complex designed by architect David Chipperfield is made almost entirely of concrete with recycled aggregates and CEM III/B cement (where conventional clinker is replaced by slag sand), including the indoor
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2021-10-28 As can be seen, the inclusion of recycled concrete powder has only increased the compressive strength for~37% and 15% for 7 and 28 day cured specimens, respectively.
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2019-9-5 The mix proportions are listed in Table 2.A cement type CEM 42.5 II/A-L 42.5R was used. The apparent specific weight of the cement is 3142 kg/m 3, while the specific surface, evaluated with the Blaine test method, is 4809 cm 2 /g. In order to increase the workability while limiting the water/cement ratio, some water-reducing admixture (WRA) and air-entraining
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In addition, 7.4 Mta of steelworks slag was produced. Fig. 9 shows the amounts recovered. It can be seen that only granulated blast furnace slag (GBFS) can be used as a cement additive. For ready-mixed concrete and other types of concrete, both normal blast furnace slag and steelworks slag are used with respective totals of 38.7 % and 20.3 %.
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2019-11-18 This paper presents the results of experimental research on the durability and performance of various mixes of recycled aggregate concrete (RAC) incorporating 25% ground-granulated blast-furnace slag (GGBS) as a cement replacement. The compressive strength, drying shrinkage, water penetration, water absorption, alkali–aggregate reactivity
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2019-10-16 Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are dumped in landfill. These
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2015-10-1 Electric arc furnace (EAF) slag is a by-product of steel production in electric arc furnaces. Several studies have tried to demonstrate its suitability in civil engineering application, such as in bituminous mixtures and cement-based materials, due to its good physical, chemical and mineralogical properties. Particularly the re-use as coarse aggregate for concrete
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2020-9-27 Recycled concrete aggregate is the term used to describe the material produced from crushed construction and demolition waste, primarily consisting of concrete but also including aggregate materials such as sand, gravel, slag, and crushed stones. Recycled aggregates are only classified as recycled concrete aggregates (RCA) when the primary
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2020-8-13 What is Recycled Concrete Aggregate. Recycled concrete as aggregate is nothing but aggregates produced from the previously used construction material such as masonry or concrete. Recycled aggregates consist of hard, graduated fragments of inert materials, which include sand, crushed stone, rock dust, gravel, slag or powder.
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Recycled Aggregate Characteristics. The crushing characteristics of hardened concrete are similar to those of natural rock and are not significantly affected by the grade or quality of the original concrete. Recycled concrete aggregates
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2013-1-30 Mirza and Saif3 have studied the effect of silica fume on recycled aggregate concrete characteristics. The percentages of recycled aggregate replacements of natural aggregate used by weight were 0, 50, and 100%, whereas the percentages of silica fume replacements of cement used by weight were 5, 10, and 15%. The results.
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2019-9-4 The substitution of the cement by slag provides two clear advantages; the first one is the use of a waste that must be managed in a landfill, and the second one, Thivya J. Effect of copper slag, iron slag and recycled concrete aggregate on the mechanical properties of concrete. Resour. Policy. 2017; 53:219–225. doi:
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2016-2-8 Their results could be used by engineers to design concrete structures that incorporate varying amounts of recycled concrete aggregates that have less environmental impact than concrete structures made with natural aggregates. Contact: Yahya “Gino” Kurama, 574-631-8377, [email protected]. Posted In: Research.
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