Effect of two different sources and washing treatment on the properties of UFS by-products for mortar and concrete production

Monosi, Saveria; Tittarelli, Francesca; Giosuè, Chiara; Ruello, Maria Letizia

doi:10.1016/j.conbuildmat.2013.02.029

Cited by 44 publications

(20 citation statements)

References 24 publications

(38 reference statements)

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“…It can be observed that the NS mixes developed the highest flowability for a same type of binder, which was followed by the GS and FS mixes, respectively. The lower flow of GS and FS mixes compared with NS mixes agrees with past research on cement‐based mortars 18,25,29,30 and concretes 9,10,31,32 . The lower flow of the GS mixes compared with that of the NS mixes is due to the somewhat smaller size and higher angularity of GS particles than those of NS particles, which leads to forming thicker water layers and lower interparticle friction in NS mixes, as pointed to in Section 3.4.1.…”

Section: Test Results and Observationssupporting

confidence: 87%

Development of a waste‐based eco‐friendly structural mortar without Portland cement and natural sand

Gholampour

Ozbakkaloglu

Ngo

2020

Structural Concrete

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The aim of this study is to develop a new eco‐friendly structural mortar for reducing the CO2 emissions inherent in the use of cement in concrete together with the extraction of the nonrenewable natural sand (NS). This clean production is achieved by fully replacing cement with glass powder (GP), ground granulated blast furnace slag (GGBS) and fly ash (FA) as industrial by‐products, and NS with glass sand (GS) and foundry sand (FS) as waste‐based sands. To this end, 26 mortar batches were prepared, and their compressive and direct tensile strength and flowability were studied. Scanning electron microscopy and energy dispersive x‐ray spectroscopy were employed to link the microstructure of the mortars with the obtained properties. The results show that waste‐based mortars (WBMs) with NS have a higher flowability compared with those with GS (up to 44%) and FS (up to 47%). The results also reveal that the strengths of WBMs with GS are identical to those with NS, whereas these properties of mortars containing FS are slightly lower (up to 6%). In addition, the results show that when 80% of cement is replaced with GGBS and 100% of NS is replaced with GS or FS, the strength marginally reduces (up to 7%) compared with the conventional mortar, which is attributed to their similar hydration products amounts at the interfacial transition zones of binder‐sand. At cement replacement levels of 90–100%, the strength of the WBMs degrades; however, the loss in strength is limited to ~20–30%. These promising results indicate the possibility of developing new eco‐friendly mortars for structural applications by completely replacing cement and NS with waste materials.

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Section: Test Results and Observationssupporting

confidence: 87%

Development of a waste‐based eco‐friendly structural mortar without Portland cement and natural sand

Gholampour

Ozbakkaloglu

Ngo

2020

Structural Concrete

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“…The composition further influences WFS performance. Moreover, the chemical and physical properties of WFS from various stages of foundry processing differ [35]. However, foundry sands produced from a single foundry or foundries consortia should not show significant variation over time and are often characterized by a consistently equivalent chemical composition.…”

Section: Natural Aggregates and Waste Foundry Sandmentioning

confidence: 99%

Mechanical Properties of Ultra-High Performance Concrete with Partial Utilization of Waste Foundry Sand

Smarzewski

2020

Buildings

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Waste foundry sand (WFS) is a ferrous and non-ferrous foundry industry by-product, produced in the amount of approximately 700 thousand tons annually in Poland and it is estimated that only a small percentage of this waste is recycled. The study used WFS to produce ultra-high performance concrete (UHPC) as a partial substitute for quartz sand. It was replaced with WFS levels of 0%, 5%, 10%, and 15% by weight of quartz sand content. The UHPC mixtures were produced and tested to determine the compressive strength, flexural strength, splitting tensile strength as well as the modulus of elasticity at 28, 56, and 112 days. Scanning electron microscope (SEM) analysis was done to identify the presence of various compounds and micro-cracks in UHPC with WFS. The results revealed an increase as well as an insignificant decrease in the mechanical properties up to 5% and 10% WFS replacement, respectively. These studies also prove improvement in the microstructure of UHPC up to a 5% WFS level. In all the tested properties in this work, 5% WFS was found to be an apt substitute for quartz sand.

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“…Very few research observations are available on the leachate analysis of the concrete/mortars made with used foundry sand. Monosi et al [64] conducted dynamic leaching tests on mortar samples as per Italian standards. They reported that the mortars made from used foundry sand do not release leachate higher than the values specified by Italian standards, and the pH of the leachate was found to be alkaline during the entire testing period.…”

Section: Leaching In Concrete and Mortars Made With Used Foundry Sandmentioning

confidence: 99%

A Review on the Usage of Recycled Sand in the Construction Industry

M¹,

Prasad²

2020

Sandy Materials in Civil Engineering - Usage and Management

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The construction industry requires natural sand for many applications. The recycled sand obtained from industrial operations can also be utilized in construc tion activities. Many industries generate waste sand as a byproduct. The material generated from this discarded molds and cores is usually known as "used foundry sand," "waste foundry sand," or "spent foundry sand." A vast quantity of used foundry sand is generating and heaping globally in a day-by-day manner. In this review article, an attempt is made to explore the characteristics and various utilizations of this recycled sand from the foundry industry as a valuable resource material in construction activities. From the analysis of the multiple types of research done so far on the reuse of waste foundry sand, it is found that the waste foundry sand is reusable in different civil engineering applications with added advantages. The advantageous applications of used foundry sand are ranging from the road base material to the substitute to fine aggregate in high-performance self-compacting concrete. More generally used foundry sand in the range of 10-30% is best suitable as a partial substitute to regular sand in mortar and concrete making. The use of recycled sand such as waste foundry sand in the construction industry can not only eliminate the problems of waste management and environmental impacts but also substantially boost up the sustainable developmental activities by way of reducing the consump tion of natural resources.

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Effect of two different sources and washing treatment on the properties of UFS by-products for mortar and concrete production

Cited by 44 publications

References 24 publications

Development of a waste‐based eco‐friendly structural mortar without Portland cement and natural sand

Development of a waste‐based eco‐friendly structural mortar without Portland cement and natural sand

Mechanical Properties of Ultra-High Performance Concrete with Partial Utilization of Waste Foundry Sand

A Review on the Usage of Recycled Sand in the Construction Industry

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