scholarly journals La segunda vida de los residuos de construcción. Propuesta para reutilizar como agregado árido reciclado y residuos de material aislante = The second life of construction waste. Proposal to reuse recycled fine aggregate and residues of insulating materials

2019 ◽  
Vol 5 (2) ◽  
pp. 1 ◽  
Author(s):  
Katarzyna Kalinowska-Wichrowska ◽  
Carolina Piña Ramírez ◽  
Alejandra Vidales Barriguete
Keyword(s):  
Second Life ◽  
Fine Aggregate ◽  
Insulating Materials ◽  
Construction Waste ◽  
Recycled Fine Aggregate

Reutilization of RFA of Construction Waste in Cement Mortar

2013 ◽  
Vol 468 ◽  
pp. 57-60
Author(s):  
Fu Xing Wang ◽  
Guo Zhong Li ◽  
Juan Chen
Keyword(s):  
Grain Size ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Cement Mortar ◽  
Mineral Admixture ◽  
Fine Aggregate ◽  
Hydration Products ◽  
Construction Waste ◽  
Recycled Fine Aggregate ◽  
Micro Morphology

The effect of some factors(dosage and grain size of recycled fine aggregate of construction waste, content of mineral admixture) on the properties of cement mortar was studied. The results indicated that when recycled fine aggregate particles gradation was areaⅡ, replacement percentage (sand) was 60%,dosage of mineral admixture was 36%, compared with blank sample, the 28d flexural strength and the compressive strength of cement mortar samples were increased by 30.7% and 37.2%, respectively. Micro-morphology of section on cement mortar was observed by SEM. Identifying the hydration products through XRD was carried out.

scholarly journals Performance of Green Concrete and Inorganic Coating Materials

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 832
Author(s):  
Sung-Ching Chen ◽  
Wei-Ting Lin ◽  
Ran Huang ◽  
Hui-Mi Hsu
Keyword(s):  
Chloride Ions ◽  
Fine Aggregate ◽  
High Porosity ◽  
Coating Materials ◽  
Conventional Concrete ◽  
Construction Waste ◽  
Green Concrete ◽  
Recycled Fine Aggregate ◽  
Inorganic Coating ◽  
Sand And Gravel

Green concrete (GC) was developed for realizing sustainable development, recycling waste materials, and reducing environmental pollution. For the practical use of GC, various harmful materials must blocked from entering its cracks and pores; and its strength and durability must be improved. The use of an inorganic coating material (ICM) for GC effectively prevents the intrusion of harmful materials and repairs the concrete. ICMs can reduce the permeability and increase the durability of concrete. This study investigated GC, construction waste, and ICMs and used recycled sand and gravel as well as construction waste as substitutes for cement. The results indicate that the coarse aggregate substitution, water-binder ratio, and recycled fine aggregate substitution must be controlled suitably in GC. Furthermore, the coating layer, fine aggregate substitution, and aging of the ICM mut be controlled suitably. GC with an ICM showed poorer performance than conventional concrete, mainly because of the high porosity. Nonetheless, the ICM somewhate reduces the porosity and resists the penetration of chloride ions, thereby promoting concrete quality.

scholarly journals Engineering and Manufacturing Technology of Green Epoxy Resin Coatings Modified with Recycled Fine Aggregates

2021 ◽  
Author(s):  
Kamil Krzywiński ◽  
Łukasz Sadowski ◽  
Damian Stefaniuk ◽  
Aleksei Obrosov ◽  
Sabine Weiß
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Construction And Demolition Waste ◽  
Fine Aggregate ◽  
Micro Computed Tomography ◽  
Demolition Waste ◽  
Replacement Ratio ◽  
Recycled Fine Aggregate ◽  
Fine Aggregates ◽  
Computed Tomography Scanning

AbstractNowadays, the recycled fine aggregate sourced from construction and demolition waste is not frequently used in manufacturing of epoxy resin coatings. Therefore, the main novelty of the article is to prepare green epoxy resin coatings modified with recycled fine aggregate in a replacement ratio of natural fine aggregate ranged from 20 to 100%. The microstructural properties of the aggregates and epoxy resin were analyzed using micro-computed tomography, scanning electron microscopy and nanoindentation. The macroscopic mechanical properties were examined using pull-off strength tests. The highest improvement of the mechanical properties was observed for epoxy resin coatings modified with 20% of natural fine aggregate and 80% of recycled fine aggregate. It has been found that even 100% of natural fine aggregate can be successfully replaced using the recycled fine aggregate with consequent improvement of the pull-off strength of analyzed epoxy resin coatings. In order to confirm the assumptions resulting from the conducted research, an original analytical and numerical failure model proved the superior behavior of modified coating was developed.

Influence of recycled fine aggregate on microstructure and hardened properties of concrete

2017 ◽  
Vol 69 (24) ◽  
pp. 1288-1295 ◽  
Author(s):  
Ravi Kumar ◽  
Subash Chandra Bose Gurram ◽  
Ashwani Kumar Minocha
Keyword(s):  
Fine Aggregate ◽  
Recycled Fine Aggregate ◽  
Hardened Properties

The Study on the Impact of Recycled Fine Aggregate and Powder on the Mechanics and Thermal Performance of Recycled Concrete Hollow Blocks

2012 ◽  
Vol 509 ◽  
pp. 119-122
Author(s):  
Wei Zhou ◽  
Ling Huan Lu ◽  
Zhen Li
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Thermal Performance ◽  
High Strength ◽  
Recycled Concrete ◽  
Fine Aggregate ◽  
Ordinary Concrete ◽  
Recycled Fine Aggregate ◽  
The Impact ◽  
The Heat Transfer Coefficient

The impact of recycled fine aggregate and powder on the mechanics and thermal performance of recycled concrete hollow blocks was discussed in this paper. The results showed that 30% recycled fine aggregate and powder have slight affect on the strength of recycled concrete hollow blocks. But the strength reduced significantly when the replacement is above 50%. The impact of recycled fine aggregate and powder on the performance of concrete hollow blocks with high strength grade is notable . The heat transfer coefficient of recycled concrete hollow blocks with 30% recycled fine aggregate and powder was equivalently to ordinary concrete hollow blocks.

scholarly journals Analysis of the Impact on Axial Compression and Diametric tensile strength of concrete using recycled fine aggregate

2021 ◽  
Vol 8 (7) ◽  
pp. 155-163
Author(s):  
Eduardo Dalla Costa Silva ◽  
Dykenlove Marcelin ◽  
Douglas Guedes Batista Torres ◽  
Thiago Guerra
Keyword(s):  
Tensile Strength ◽  
Axial Compression ◽  
Fine Aggregate ◽  
Recycled Fine Aggregate ◽  
The Impact
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