Study of the material properties of fly ash added to oyster cement mortar

Wang, Her-Yung; Kuo, Wen-Ten; Lin, Chun-Yang; Po-Yo, Chen

doi:10.1016/j.conbuildmat.2012.11.021

Cited by 87 publications

(48 citation statements)

References 14 publications

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“…et al (8) have shown that there is no significant reduction of the compressive strength when they replace up to 40% of sand by OS powder. Moreover, it is observed that the addition of moderate amounts of fly ash and OS powder as sand substituent in mortars improve workability, porosity, compressive strength and durability and reduce the absorption rate of mortars (9). The partial replacement of sand by OS powders in concrete has a positive effect on the resistance to freeze-thaw, drying shrinkage and water permeability.…”

Section: Introductionmentioning

confidence: 99%

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Composite cement mortars based on marine sediments and oyster shell powder

Ez-zaki¹,

Diouri²,

Kamali-Bernard³

et al. 2016

Mater. construcc.

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Additions of dredged marine sediments and oyster shell powder (OS) as cement substitute materials in mortars are examined by several techniques. The sediments have high water and chloride contents and calcite, quartz, illite and kaolinite as principal minerals. The OS powders are entirely composed of calcium carbonate and traces of other impurities. Four mixtures of treated sediments and OS powders at 650 °C and 850 °C are added to Portland cement at 8%, 16% and 33% by weight. The hydration of composite pastes is followed by calorimetric tests, the porosity accessible to water, the bulk density, the permeability to gas, the compressive strength and the accelerated carbonation resistance are measured. In general, the increase of addition amounts reduced the performance of mortars. However, a reduction of gas permeability was observed when the addition was up to 33%. Around 16% of addition, the compressive strength and carbonation resistance were improved. RESUMEN: Morteros de cemento basado en sedimentos marinos y polvo de concha de ostra.En este trabajo se ha valorado la sustitución de cemento en morteros por sedimentos marinos dragados y polvo de concha de ostra (OS). Los sedimentos tienen altos contenidos de agua, cloruros, calcita, cuarzo, illita y caolinita como minerales principales. Los polvos OS están compuestos de carbonato cálcico y trazas de otras impurezas. Se añadieron a un cemento Portland, cuatro mezclas de los sedimentos y polvos de OS tratados a 650 °C y 850 °C en proporciones del 8%, 16% y 33% en peso. La hidratación de pastas se estudió a través de calorimetría. Se estudió además la porosidad accesible al agua, densidad aparente, permeabilidad al gas, resistencia a compresión y carbonatación acelerada. En general, un aumento en la adición produjo una reducción del rendimiento de los morteros. Se observó, sin embargo, una reducción de la permeabilidad a los gases con porcentajes de adición de hasta el 33%. Con valores del 16% de sustitución, mejoraron las resistencias mecánicas y la resistencia frente a la carbonatación.

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Section: Introductionmentioning

confidence: 99%

“…It is noted that the oyster shell powders (OS) consist entirely of calcium carbonate with few impurities (8,9). When these powders are introduced in the concrete, workability decreases with the degree of substitution.…”

Section: Introductionmentioning

confidence: 99%

Composite cement mortars based on marine sediments and oyster shell powder

Ez-zaki¹,

Diouri²,

Kamali-Bernard³

et al. 2016

Mater. construcc.

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“…Oyster shell material without additive substance will not have a good acoustic performance, due to the low absorption coefficient between 0.03 -0.04 [7]. Even, the fly ash mixed with oyster shell will reduce pores and reduce the ability of sound absorber [9].…”

Section: Acoustical Performance Of Shell Materialsmentioning

confidence: 99%

The Acoustical Properties of the Polyurethane Concrete Made of Oyster Shell Waste Comparing Other Concretes as Architectural Design Components

Setyowati

Hardiman

Purwanto³

2018

E3S Web Conf.

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Abstract. This research aims to determine the acoustical properties of concrete material made of polyurethane and oyster shell waste as both fine aggregate and coarse aggregate comparing to other concrete mortar. Architecture needs aesthetics materials, so the innovation in architectural material should be driven through the efforts of research on materials for building designs. The DOE methods was used by mixing cement, oyster shell, sands, and polyurethane by composition of 160 ml:40 ml:100 ml: 120 ml respectively. Refer to the results of previous research, then cement consumption is reduced up to 20% to keep the concept of green material. This study compared three different compositions of mortars, namely portland cement concrete with gravel (PCG), polyurethane concrete of oyster shell (PCO) and concrete with plastics aggregate (PCP). The methods of acoustical tests were conducted refer to the ASTM E413-04 standard. The research results showed that polyurethane concrete with oyster shell waste aggregate has absorption coefficient 0.52 and STL 63 dB and has a more beautiful appearance when it was pressed into moulding. It can be concluded that polyurethane concrete with oyster shell aggregate (PCO) is well implemented in architectural acoustics-components.

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“…The best solution to overcome the environmental impact of these wastes is to reuse them. Many researchers prove the benefit derived from reusing various waste materials, such as, fly ash [1], paper sludge ash [2], clay aggregate [3], tire crumb [4], siliceous and aluminous materials, as well as some natural pozzolanic materials [5] in the production of cement clinkers, and it has been proposed that these wastes have high potential for being alternative raw materials [6]. The use of by-products or residues generated from other activities seems to be a good approach to solve both economic and environmental problems related to cement production [7].…”

Section: Introductionmentioning

confidence: 99%

“…Shells are used to improve mechanical proprieties of mortar [1], monetite [8] and engineering properties of controlled low-strength materials [9]. Shells also used to synthesis bioactive Hydroxyapatite [10].…”

Section: Introductionmentioning

confidence: 99%

Valorization of glass and shell powders in the synthesis of Belitic clinker

et al. 2018

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Abstract. In recent years, waste recycling has become a key issue in construction materials science for achieve the goal of sources of raw materials. The aim of this study is to use waste glass as source of SiO 2 oxide and mussel shells consisting essentially of calcium carbonate as starting materials to synthesize belite rich cement. The elaborated clinker is chemically and structurally related to β-Ca 2 SiO 4, by heat solid state activation. After grinding, the raw materials are mixed and heated up to 1050°C. The samples are characterized by X-ray diffraction (XRD) and Fourier Transformed Infrared spectroscopy (FT-IR). The mechanical strength of some sample was measured for 28 and 72 days. The results show the different mineralogical stapes of formation of clinker, the state reaction method allows the elaboration of a cementitious material by a simple heat treatment at relatively low temperature and low release of CO 2. The hydration products are also identified by XR diffraction at 2, 7, 28 and 72 days.

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Study of the material properties of fly ash added to oyster cement mortar

Cited by 87 publications

References 14 publications

Composite cement mortars based on marine sediments and oyster shell powder

Composite cement mortars based on marine sediments and oyster shell powder

The Acoustical Properties of the Polyurethane Concrete Made of Oyster Shell Waste Comparing Other Concretes as Architectural Design Components

Valorization of glass and shell powders in the synthesis of Belitic clinker

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