Papers by Keyword: Marble Powder

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Authors: Mehmet Serkan Kirgiz
Abstract: The paper was incisive about marble and brick wastes problem. In Turkey, annual approximately 2 592 000 t marble waste and 3 800 000 t brick waste are turn out while marble and brick manufactures. These wastes are stored agrarian land so they are contaminated environment and terrain. Chemical, physical, and pozzolanic properties of the marble and brick powders described characteristic properties were helped whether to use them as mineralogical substitute or blend in cement or not. The aim of this study is to establish characteristic properties of marble and brick powders. Tekmar Marble Factory's marble powder and Kaman Brick Factory's brick powder were used as materials. Characteristic properties of the marble and brick powders were lie down via standard experiment methods known literature. Results show that the powders are compatible to add cement clinker or to substitute for cement to improve their properties.
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Authors: Mehmet Serkan Kirgiz
Abstract: The aim of the experimental study is to determine chemical properties of substituted and blended cement contained marble and brick powders to provide efficacy for the economical and the environmental aspect. Marble and brick powders, CEM I 42.5N cement and clinker were used as materials in the study. Substituted cements were prepared with the addition of cement for marble or brick powder at the ratios of % 6, 20, 21, 35. Blended cements were mixed the addition of cement clinker for marble or brick powder at the ratios of % 6, 20, 21, 35. And CEM I 42.5N cements were also chosen as Reference cement. Results show that marble and brick powders can prevalently add as substitute or blend materials to cement to prevent it detrimental chemicals like alkali-silica reaction.
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Authors: Zdeněk Prošek, Jaroslav Topič, Karel Šeps, Pavel Tesárek
Abstract: For production of the samples were used several types of aggregate: the standard sand from Zalezlice, the standard sand from Gaza, waste crushed limestone, waste marble sludge and waste micronized marble powder. The Portland cement CEM I 42.5 R produced in Radotín was used as binder. Testing was carried at prismatic samples of dimension 40 × 40 × 160 mm. Another approach than previously used solutions consists primarily in micronization marble sludge with a high-speed mill, this modified micronized filler may also an impact on the final properties of composite materials based on cement. The micronized powder may have binding properties that are activated in this way. Dynamic modulus of elasticity, dynamic shear modulus, flexural strength and compressive strength were determined for the 28 days old samples.
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Authors: Metin Gürü, Süleyman Tekeli, Emin Akin
Abstract: The amount of marble dust occurred during machining and cutting of marble pieces and fly ash emitted from coal power plant is rather high and these wastes create significant environmental pollution. In fact, these wastes can be utilized in various industrial applications. In this study, various amount of fly ash, marble dust and polyester as base material, methyl ethyl keton peroxid as hardener and cobalt naphtanats as accelerator were used to produce polyester matrix composite material. Mechanical properties of composite materials were investigated and the optimum values were determined. In the first step of the manufacturing of composite material, the amounts of hardener, accelerator and polyester were kept constant and only fly ash/marble dust ratio was changed. The experimental results showed that while fly ash/marble dust ratio up to 1/3 was increased, the strength and hardness of the composite materials increased. Thus, the composite materials with high strength and hardness were produced. The optimum three point bending strength and hardness values were 30.42 N/mm2 and 98 Shore A, respectively. In the second step, the amounts of hardener, accelerator and fly ash/marble dust ratio were kept constant and the effects of the change in the amount of polyester were investigated. It was seen that the highest tree point bending strength and hardness were obtained at polyester/filler (marble dust +fly ash) ratio of 0,38. The optimum three point bending strength and hardness values were 32.78 N/mm2 and 99 Shore A, respectively.
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Authors: Jian Guo Wang, Lin Wu, Jin Xia Zhou, Xiao Yan Qi, De Lian Yi
Abstract: A grey-white marble/UP composite material was prepared by using marble powder as the filler and Unsaturated polyester (UP) resin as the polymer matrix. Optimum amount of marble powder added into 100 g UP resin was 200g. The gel time and the curing time were 10.5min and 34min respectively, the peak temperature reaches 71.44°C, and heat-resistance temperature was enhanced by 81°C. Marble/UP composite material is smooth, equally distributed, and no aggregation of particles of marble powder.
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Authors: Lukáš Hlubocký, Zdeněk Prošek
Abstract: The article deals with the shrinkage of a cement composite with various contents of waste micronized limestone powder with a fraction size of 0-63 μm and crushed limestone with a fraction size of 0-2 mm. Waste micronized powder is produced by high-speed grinding of marble sludge. The difference in shrinkage of various mixtures has been described by means of structural analysis. Electron microscopy has been used for this analysis. Mixtures with 10 wt. % of cement and various ratios of micronized marble powder to crushed limestone (1: 1; 1: 2; 2: 1; 1: 0) were investigated. The increasing amount of waste micronized powder adversely affects the shrinkage of the cement composite. This effect is caused by the increasing water–cement ratio for the purpose of achieving the same workability of the mixture.
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Authors: Zdeněk Prošek, Karel Šeps, Jaroslav Topič
Abstract: This article was focused on the influence of the micronized waste marble powder on mechanical properties of cement pastes. Resulting blended cement was composed of Portland cement CEM I 42.5 R and micronized marble powder with different percentage amounts (0 wt. %, 5 wt. %, 10 wt. % and 15 wt. %). Testing was carried at prismatic samples of dimension 40 × 40 × 160 mm. The investigated mechanical properties were dynamic modulus of elasticity, dynamic shear modulus, flexural strength and compressive strength for the 28 days old samples. The results obtained from these materials were compared with reference material.
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