Wpływ właściwości popiołu lotnego z termicznego przekształcania osadów ściekowych
na parametry betonu zwykłego

Rutkowska, Gabriela; Filipchuk, Sergij; Fronczyk, Joanna

doi:10.22630/aspa.2020.19.3.26

Cited by 6 publications

(4 citation statements)

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“…It is assumed that the phosphate ions contained in the ash and the loss on ignition affect the compressive strength of concretes produced with the fly ash from the thermal conversion of sewage sludge [48,49]. It was observed that the fly ash from another batch used by the authors in previous studies [16,29,30] was characterized by a poorer chemical composition than the fly ash used in the presented research. The pozzolanic activity of the fly ashes from thermal conversion of sewage sludge, determined as the total content of reactive Al 2 O 3 and SiO 2 based on ASTM C379-65T [47], was 20.31%.…”

Section: Physical and Chemical Properties Of Fly Ashmentioning

confidence: 96%

“…According to PN-88/B-06250, the concrete samples subjected to freezing and thawing cycles should not show any damage or cracks, and their weight loss cannot exceed 5%. Additionally, the decrease in compressive strength should not exceed 20% [16]. An important factor affecting the frost resistance of the concrete is the air content.…”

Section: Frost Resistancementioning

confidence: 99%

“…The research on the fly ash from thermal conversion of sewage sludge (SSA) presented in the literature focuses on determining its potential for application in building materials such as: burnt tiles, bricks [7][8][9], glass ceramics [10][11][12], mortars, cement pastes and concretes [13][14][15][16]. This additive is used as a direct substitute for cement, sand or clay.…”

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confidence: 99%

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Fly Ash from Thermal Conversion of Sludge as a Cement Substitute in Concrete Manufacturing

2021

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Striving for reduction of production costs and constraints on natural resources cause the use of waste materials as substitutes of traditional raw materials to become increasingly important. Dynamic development of sewerage systems and sewage treatment plants observed over the recent years leads to increase of mass of the produced sewage sludge. According to the Waste Law, the municipal sewage sludge can be used if it is properly stabilized, e.g., through thermal processing. This process results in significant quantities of fly ash which must be properly utilized. The paper presents results of investigations of influence of partial replacement of cement by the fly ash from sewage sludge on concrete parameters. It was designed as a C20/25 class concrete mix, based on the Portland cement CEM I 42.5R with various ash content. Physical and chemical properties of the ash as well as frost resistance and the compressive strength of the concrete after 28, 56 and 365 days of curing were investigated. The obtained results of investigations confirm the possibility of application of fly ash wastes as a cement substitute in the concrete manufacturing. If a predefined quantity of cement is replaced by the fly ash, then one can obtain cement composite with good strength parameters.

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Section: Physical and Chemical Properties Of Fly Ashmentioning

confidence: 96%

Section: Frost Resistancementioning

confidence: 99%

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confidence: 99%

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Fly Ash from Thermal Conversion of Sludge as a Cement Substitute in Concrete Manufacturing

2021

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“…4,5 Various methods of curing includes immersion in water, 6 sprinkling, 7 wet coverings, 8 plastic sheet covering, 9 open air curing, 10 and curing with use of chemical admixtures 11 or internal curing with use of natural fibers. 12,13 Many researchers have studied the effect of curing conditions on the strength development and shrinkage of ordinary concrete, 14 high-performance concrete, [15][16][17] lightweight concrete, 18 self-compacting concrete, 19,20 concrete containing supplementary cementitious materials as silica fume, 21,22 fly ash, 23 geopolymers, 24,25 clay, fly ash-clay, or shale ceramsite. 26 The actual concrete curing starts in the moment of compaction -maintaining ambient relative humidity over 90% limits shrinkage deformations to a large extent.…”

Section: Introductionmentioning

confidence: 99%

Influence of compressive strength and maturity conditions on shrinkage of ordinary concrete

Szlachetka

Witkowska-Dobrev

Dohojda

et al. 2021

Advances in Mechanical Engineering

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The paper presents results of investigations of compressive strength and shrinkage of concrete samples made on the basis of the Portland cement CEM I 32.5R, after 2, 7, 14, 28, 90, and 365 days of maturation in four different maturation conditions. It was shown that after 28 days the samples cured according to the standard in the cuvettes with water achieved the highest compressive strength, although the early-age compressive strengths after 7 and 14 days were lower than those for the samples cured in building film and in dry conditions. A determined correlation between the compressive strength and shrinkage of the concrete proves that wet curing also allows a total elimination of the shrinkage in the first 28 days. Along with the growth of the compressive strength, the drying shrinkage reduces. Obtained results confirmed that the best way of concrete curing, among the analyzed methods, from the point of view of both compressive strength and volume changes is the wet curing.

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Concrete Behavior Under Dynamic Loads in Bridge Structures

Filipchuk,

Karavan,

Karavan

et al. 2024

Lecture Notes in Civil Engineering

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Wpływ właściwości popiołu lotnego z termicznego przekształcania osadów ściekowych na parametry betonu zwykłego

Cited by 6 publications

References 0 publications

Fly Ash from Thermal Conversion of Sludge as a Cement Substitute in Concrete Manufacturing

Fly Ash from Thermal Conversion of Sludge as a Cement Substitute in Concrete Manufacturing

Influence of compressive strength and maturity conditions on shrinkage of ordinary concrete

Concrete Behavior Under Dynamic Loads in Bridge Structures

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