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Measurement of Water Absorption of Recycled Aggregate
2022.7.25 Owing to the high absorption capacity of recycled aggregate (RA), it is crucial to accurately measure its saturated-surface-dried water absorption (W SSD),
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Analysis of the Infiltration and Water Storage
2023.1.16 Bhashya et al. used recycled fine aggregates with water–cement ratios of 0.45, 0.50, and 0.55 to replace sand to prepare concrete and evaluated its durability performance; the outcomes
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Water absorption of fine recycled aggregates: effective determination ...
2018.9.21 The high absorption of fine recycled aggregates is indicated as the main difference with respect to fine natural aggregates. This property determines the extra
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(PDF) Water absorption of recycled aggregates
2020.9.7 Recycled Concrete Aggregates are highly porous and may therefore absorb more water than natural aggregates. Several methods allow for the measurement of water absorption requiring drying at...
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Investigation of Water Absorption Behavior of Recycled
2023.4.7 At a certain moment, the relative humidity inside and outside the recycled aggregate reaches equilibrium, which is the maximum limit of water absorption of
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New approach in measuring water absorption of recycled
2008.3.1 This characterizes concrete made with higher water absorption recycled aggregate reduced compressive strength and resistance to freezing and thawing than
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New approach in measuring water absorption of recycled
2008.3.1 In adopting recycled aggregate to produce recycled aggregate concrete, the properties and behaviours of recycled aggregate should be determined accurately. The
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Recycled aggregates from construction and demolition
2022.7.15 Because of the higher water absorption, recycled coarse aggregates typically need more water than conventional concrete to obtain the same workability; it
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Influence of silica fume on mechanical and physical
2015.8.1 The absorption values of concrete containing the recycled coarse aggregates are higher than those of the normal concrete and results show an increasing trend toward higher recycled concrete aggregate content [35], [36]. However, the volumetric water absorption values of concrete containing the recycled aggregate with SF were
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Materials Free Full-Text Impact of Recycled
2022.2.28 This work presents an overview on the influence of recycled aggregate quality on the physical, mechanical and environmental properties of concrete. ... due to higher water absorption, porosity, and
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Quality improvement techniques for recycled aggregates
2023.4.3 The quality of the recycled aggregate was improved due to microbial precipitation, which reduced the water absorption of the recycled aggregate [22], [23]. ... Nevertheless, concrete made with treated RA has 34.9% and 25.4% higher water absorption at 0.35 and 0.5 w/c ratios respectively. Density and water absorption are inversely
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Shrinkage prediction of recycled aggregate structural
2022.5.1 The particle gradation of all aggregate fractions was continuous and suitable for concrete manufacturing (Fig. 1).On the other hand, the density and water absorption levels of all the aggregates exhibited usual values (Table 1) [54], the density of NA being higher than that of RA, and the water absorption of RA higher.All the aggregates were
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Investigating the Effects of Recycled Aggregate and Mineral
2023.7.21 This is because recycled aggregate is more porous and has a higher water absorption value than dolomite aggregate, as shown in Table 4. The results also show that, in comparison to the control mix produced with the recycled aggregate, slump = 9 cm, the slump value of the concrete mixes created with recycled aggregate increased with the
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Effect of the Moisture Content of Recycled Aggregate on the
2022.9.10 The results also explained well why the water absorption of RA was much higher than NA. 3.3. Properties of Recycled Concrete ... However, when using saturated dry recycled aggregate, the water stored in the aggregate was released into the slurry under the action of centrifugal force, and the effective water–cement ratio of the interfacial ...
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Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete
2019.11.5 The water absorption of fine RCA ranges between 4.3% and 13.1% and the dry density of fine RCA ranges from 1900 to 2360 kg/m 3 . The higher water absorption and lower density of RCA is caused by old mortar attached to the surface of original aggregate; for this reason the mortar is more porous and less dense than the aggregate
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New approach in measuring water absorption of recycled
2008.3.1 The higher water absorption of the coarse aggregate resulted from the higher absorption rate of cement mortar attached to the aggregate particles [22], [23], [24]. This ... To overcome the above problems, a new approach to assess the water absorption of recycled aggregate is needed. The following presents an alternative methodology named
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A review on recycled aggregate concretes (RACs) - IOPscience
2022.5.1 The recycling of waste concrete materials in the civil constructions is a critical issue like recycled aggregate concrete is weakly adhered mortar having higher porosity and water absorption, forming weak interfacial transition zones, causing an adverse impact on the mechanical properties and durability. But the use of pozzolanic materials
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Effect of recycled concrete aggregates on the mechanical
2023.3.7 Concrete made from 100% recycled aggregate requires a large amount of cement to achieve high compressive strength and consequently, it is not an economic proposition (Etxeberria et al. 2007). The elastic modulus of recycled concrete aggregate (RCA) decreases and the water absorption increases with increase in the percentage of
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Measurement of Water Absorption of Recycled Aggregate
2022.7.25 Abstract. Owing to the high absorption capacity of recycled aggregate (RA), it is crucial to accurately measure its saturated-surface-dried water absorption (W SSD ), which largely affects an effective water-to-binder ratio of recycled aggregate concrete. In this study, existing measurement methods for the W SSD of RA are extensively reviewed ...
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Measurement of Water Absorption of Recycled
2022.7.25 Owing to the high absorption capacity of recycled aggregate (RA), it is crucial to accurately measure its saturated-surface-dried water absorption (WSSD), which largely affects an effective water
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Analysis of the Infiltration and Water Storage
2023.1.16 In the volume mixing test, the volume water absorption rate of recycled aggregate can reach 2.5 times of that of natural aggregate, and the volume water retention rate of recycled aggregate is close to 3
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Treatment of recycled concrete aggregate to enhance
2021.11.8 The 20-mm maximum aggregate size resulted in a higher water absorption at 0% and 100% replacement levels whereas the water absorption was higher for the 10-mm maximum aggregate size at 33% and 67% replacement levels. This increase in the water absorption was attributed to the low-quality of RCA and the high volume of porosity in the
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Performance enhancement of recycled concrete aggregate –
2016.1.20 RCA have higher porosity and water absorption, and lower strength compared with NA. The water absorption of RCA ranges 3–12% compared with 1–5% for NA (Gómez-Soberón, 2002, Katz, 2003). The density and absorption of RCA depend upon the W/C ratio of the original concrete (Etxeberria et al., 2007) and the amount of adhered
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Enhancement mechanism of different recycled fine
2022.12.15 2.2. Test methods2.2.1. Property testing of fine aggregates. The physical properties of different fine aggregates (such as particle gradation, apparent density, water absorption and crushing value) were tested according to GB/T 14684 - 2011, 2011.The pH values of the recycled fine aggregates were determined according to NY/T 1377-2007,
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MS highlight: Limbachiya, et al. (2000), Use of recycled aggregate
2022.1.31 The properties of recycled aggregate concrete which are closely related to engineering production were studied in the highlighted paper. Recycled coarse aggregate concrete with different water-cement ratios and different strengths (50 ~ 70 N/mm 2) was studied, and the main mechanical properties and durability of high-performance recycled
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Measurement of Water Absorption of Recycled Aggregate.
2022.7.25 Owing to the high absorption capacity of recycled aggregate (RA), it is crucial to accurately measure its saturated-surface-dried water absorption (W SSD), which largely affects an effective water-to-binder ratio of recycled aggregate concrete.In this study, existing measurement methods for the W SSD of RA are extensively reviewed, including
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An evaluation of the recycled aggregate characteristics and
2020.4.1 Generally, the apparent density of recycled aggregate is lower relative to natural aggregate, whereas recycled aggregate has much higher water absorption as compared with natural aggregate [8].
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Concrete produced with recycled concrete aggregate
2023.7.1 The improved compressive strength of treated RCA concrete is due to the treated aggregates' higher density and lower water absorption because of the efficient removal of adhered mortar [13], [14]. Tam et al. [15] produced concrete with a w/c ratio of 0.45 by replacing a natural coarse aggregate with treated and untreated RCA at 20 %
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