Wyniki wyszukiwania - BazTech

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Shrinkage and Absorption of Sand Concrete Containing Marble Waste Powder

Djebien Rachid, Abbas Yassine, Bouabaz Amel, Ziada Yasser Nacereddine

Civil and Environmental Engineering Reports

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2022

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Vol. 32, no. 1

240--254

EN

In the context of growing scarcity of natural resources, the high demand of aggregates and the difficulties to open new quarries, several studies were carried out to study the possibility of reuse of waste and industrial by-products to replace traditional materials which would run out, replace materials when transport distances increase to reduce construction costs and protect the environment. This experimental study aims to investigate the effect of marble waste used as powder on the shrinkage and absorption of sand concrete in order to reuse it in the production of sand concrete. To achieve this goal, several sand concrete mixtures containing different substitutions rates of marble powder (4, 8 and 12%), and different Water / Cement ratio (0.71, 0.74, 0.77) were produced. Then, the evolution of the shrinkage and absorption values of sand concrete mixtures was studied. The obtained results showed that marble waste powder plays a positive role in reducing of shrinkage and absorption values of sand concrete and lead to the production of eco-friendly sand concrete.

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The study of the characteristics of sand concrete based on marble waste sand

Bebhalilou Mohamed Ichem, Belachia Mouloud, Houari Hacene, Abdelouahed Assia

Civil and Environmental Engineering Reports

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2020

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Vol. 30, no. 1

130--144

EN

The present study aims to valorize the waste and in particular the waste from the Fil-fila quarry. The main reason for choosing the waste from this quarry was the need to reduce the impact on the environment (by reducing stockpiling) and the raw material cost (economic reason). This study therefore consists in recovering this type of waste (discarded powder subject to weather changes) as sand in partial replacement of dune sand in the formulation of sand concrete with percentages of 5, 10, 15 and 20 %, by studying the behavior of these concretes in the fresh state (workability, density and occluded air) and the properties in the hardened state (compressive and tensile strength by bending, absorption by immersion, shrinkage and weight loss, chemical effect of HCl and H2SO4 solutions), and subsequently comparing the results obtained with reference samples (0%) based on ordinary sand. Based on the obtained results, it can be concluded that the substitution of ordinary (dune) sand with marble waste sand provides acceptable results from the point of view of workability, strength and durability. These observations are likely to widen the field of applications of these sand concretes based on marble waste.

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Valorization of waste in sand concrete based on plant fibres

Rihla Chaher, Hebhoub Houria, Djebien Rachid, Abdelouahed Assia

Civil and Environmental Engineering Reports

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2019

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Vol. 29, no. 4

41--61

EN

The introduction of treated plant fibres into sand concretes leads to a reduction in density, improved ductility and thermal conductivity, and makes sand concrete an environmentally friendly and ecological material. The recovery of waste in this type of material allows the production of new ecological and sustainable materials used either in the new construction or in the rehabilitation of old buildings. In this context, a comparative study was based on the valorisation of marble and ceramic waste as sand in sand concrete made from straw fibres. To carry out this study, we introduced these wastes at substitution rates of 10% and 20%, separated and mixed, and studied the development of the properties of these concretes (density, workability, air content, compressive strength and bending tensile strength) and their behaviour with respect to durability (capillary and immersion absorption and chloride penetration). The study shows that the recovery of this waste as sand in sand concrete based on straw fibres gives satisfactory results. The chemical resistance, thermal conductivity and microstructure are under study, the results of which will be the subject of another publication.

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Porównanie właściwości fibrokompozytu na bazie piasków odpadowych do wymagań normowych dotyczących betonu zwykłego

Głodkowska W., Kobaka J.

Przegląd Budowlany

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2017

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R. 88, nr 9

98--104

PL

W artykule przedstawiono wyniki badań wpływu zawartości stalowego zbrojenia rozproszonego na szereg właściwości fibrokompozytów zbrojonych włóknami stalowymi wytworzonych na bazie piasków odpadowych. Autorzy podjęli także próbę wyselekcjonowania takiego fibrokompozytu, którego właściwości spełniłyby wymagania stawiane materiałom konstrukcyjnym i były lepsze niż dla betonu zwykłego. Przedstawiono szereg zalet i wad zastosowania takich materiałów. Poruszono także aspekt ekologiczny zagospodarowania hałd piasku będących wynikiem procesu hydroklasyfikacji w trakcie pozyskiwania kruszyw grubych.

EN

The article presents the results of studies on the influence of steel fibre reinforcement on a series of properties exhibited by fine aggregate composite based on waste sand. The authors also made an attempt to select such a composite which properties would meet the requirements laid out for construction materials, and exceed those of ordinary concrete. A list of advantages and disadvantages of applying such materials has been presented. The aspect of the ecological management of sand heaps which occurs as a result of the hydroclassification process when obtaining coarse aggregates has also been touched upon.