scholarly journals The Effect of Temperature and Composition to the Rheological Properties of Asphalt Pavements

2008 ◽  
Vol 589 ◽  
pp. 85-91 ◽  
Author(s):  
László A. Gömze ◽  
Róbert Géber ◽  
Judit Csányi Tamásné
Keyword(s):  
Rheological Properties ◽  
Mechanical Model ◽  
Building Materials ◽  
Raw Materials ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Effect Of Temperature ◽  
Mineral Raw Materials ◽  
Low Viscosity ◽  
The Government

Ceramics, concretes and asphalt-mixtures are the most popular building materials in Hungary, because of the highway programme of the government. In spite of their large popularity, some of the mechanical properties of ceramics, concretes and asphalts are not investigated enough till today. Particularly, there is no mechanical model usable to understand and explain the rheological behaviours of these materials with different compositions of mineral raw materials. It is well known, that the viscosity of viscous materials, viscoelastic materials, and viscoplastic materials dynamically decreases, as the temperature increases. The decrease of viscosity by leaps and bounds could be extremely dangerous in case of asphalt pavements in the range of 55 – 75 °C, due to the crossing of cars on the low viscosity pavements which suffer inelastic deformation, as a result. Using a Rheo-tribometer instrument developed by L. A. Gömze and others, the authors have investigated and tested asphalt mixtures with different composition of mineral raw materials, and would like to reveal and review the dependence of the rheological properties of these pavements against the temperature, and the intensity of the dependence.

scholarly journals Rheological and Microbiological Characteristics of Hops and Hot Trub Particles Formed during Beer Production

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 681
Author(s):  
Monika Sterczyńska ◽  
Marek Zdaniewicz ◽  
Katarzyna Wolny-Koładka
Keyword(s):  
Rheological Properties ◽  
Raw Materials ◽  
Raw Material ◽  
Microbiological Analysis ◽  
Waste Products ◽  
Low Viscosity ◽  
Post Process ◽  
High Shear Rates ◽  
Different Temperatures ◽  
Beer Production

During the production of beer, and especially beer wort, the main wastes are spent grain and hot trub, i.e., the so-called “hot break.” Combined with yeast after fermentation, they represent the most valuable wastes. Hot trub is also one of the most valuable by-products. Studies on the chemical composition of these sediments and their rheological properties as waste products will contribute to their effective disposal and even further use as valuable pharmaceutical and cosmetic raw materials. So far, hot trub has been studied for morphology and particle distribution depending on the raw material composition and beer wort extract. However, there are no preliminary studies on the rheological properties of hot trub and hops. In particular, no attention has yet been paid to the dependence of these properties on the hop variety or different protein sources used. The aim of this study was to examine the effect of different hopping methods on hot trub viscosity and beer wort physicochemical parameters. Additionally, the hop solutions were measured at different temperatures. A microbiological analysis of hop sediments was also performed to determine the post-process survival of selected microorganisms in these wastes. For manufacturers of pumps used in the brewing industry, the most convenient material is that of the lowest viscosity. Low viscosity hot trub can be removed at lower velocities, which reduces costs and simplifies washing and transport. The sediments also had similar equilibrium viscosity values at high shear rates.

GEOENVIRONMENTAL PROBLEMS IN QUARRYING OF MINERAL RAW MATERIALS FOR BUILDING MATERIALS PRODUCTION

2014 ◽  
Vol 4 (1) ◽  
pp. 80-85 ◽  
Author(s):  
Margarita Nikolaevna Baranova ◽  
Natal'ya Genrikhovna Chumachenko ◽  
Vladimir Viktorovich Tyurnikov
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Primary Treatment ◽  
Mineral Raw Materials ◽  
Ecological Problems

Geoenvironmental problems in quarrying, transportation and primary treatment of mineral raw stuff for building materials production are viewed. Main types of impurities are described. Ways to resolve ecological problems are determined. To reduce geoenvironmental tensions it is recommended to intensify efforts for entrainment of manmade products in building materials production.

scholarly journals Studying the Rheological Properties of Non-Newtonian Fluids under the Effect of temperature Using Different Chemical Additives

2020 ◽  
Vol 21 (2) ◽  
pp. 47-56
Author(s):  
Douaa Hussein Ali ◽  
Muhannad A.R. Mohammed
Keyword(s):  
Rheological Properties ◽  
Yield Point ◽  
Apparent Viscosity ◽  
Methyl Cellulose ◽  
Plastic Viscosity ◽  
Newtonian Fluids ◽  
Effect Of Temperature ◽  
Chemical Additives ◽  
Bingham Plastic ◽  
Low Viscosity

   This research studies the rheological properties ( plastic viscosity, yield point and apparent viscosity) of Non-Newtonian fluids under the effect of temperature using different chemical additives, such as (xanthan gum (xc-polymer), carboxyl methyl cellulose ( High and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch, Quebracho and Chrome Lignosulfonate). The samples were prepared by mixing 22.5g of bentonite with 350 ml of water and adding the additives in four different concentrations (3, 6, 9, 13) g by using Hamilton Beach mixer. The rheological properties of prepared samples were measured by using Fan viscometer model 8-speeds. All the samples were subjected to Bingham plastic model. The temperature range studied is from 50 to 200 °F. The results shows that the rheological properties (plastic viscosity, apparent viscosity and yield point) decreased as temperature increased for all prepared samples of non-Newtonian fluids.

Effect of Temperature on Phase Angle and Dynamic Modulus of Asphalt Mixtures Using SPT

2020 ◽  
Vol 1007 ◽  
pp. 99-104
Author(s):  
Juraidah Ahmad ◽  
Mohd Rosli Hainin ◽  
Ekarizan Shaffie ◽  
Khairil Azman Masri ◽  
Mohd Amin Shaffi
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Performance Test ◽  
Complex Modulus ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Load Resistance ◽  
Asphalt Mixtures ◽  
Effect Of Temperature ◽  
Low Viscosity

The Simple Performance Test (SPT) can be used to characterize the strength and load resistance of asphalt mixtures. The objectives of this study are to determine the effect of temperature on the phase angle and dynamic complex modulus of the asphalt mixtures tested at 30°C, 35°C, 40°C, 45°C and 50°C at 25Hz, 20Hz, 10Hz, 5Hz, 1Hz and 0.5Hz frequencies. The asphalt mixtures of NMAS 12.5mm are prepared using asphalt binder PEN 80/100 and PEN 60/70. The asphalt mixtures are designed using the Superpave system and compacted using the Superpave Gyratory Compactor (SGC). The dynamic modulus test results showed that at a higher temperature, the stiffness of the asphalt mixtures is affected. The dynamic modulus of the mixtures is highest at 30°C and gradually decrease at 35°C, 40°C, 45°C and 50°C respectively. The dynamic modulus values for asphalt mixtures with bitumen grade PEN 60/70 are also higher compared to the asphalt mixtures with bitumen grade PEN 80/100. Results also showed that the low phase angle values indicate low viscosity of the asphalt binder due to increase in temperature. The present study is meaningful in understanding the asphalt mixture behaviour at different temperature and loading frequencies.

Regulation of Rheological Properties of Three-Phase Dispersed Systems Used for the Production of Building Materials

2021 ◽  
Vol 1037 ◽  
pp. 699-704
Author(s):  
Vladimir V. Belov ◽  
Pavel V. Kuliaev
Keyword(s):  
Rheological Properties ◽  
Building Materials ◽  
Solid Phase ◽  
Raw Materials ◽  
Intermolecular Forces ◽  
Two Phase ◽  
Dispersed Systems ◽  
Three Phase ◽  
Capillary Coupling ◽  
Relationship Of

The paper considers the relationship of the rheological properties of three-phase dispersed systems with capillary coupling and, on this basis, substantiates the possibility of directional regulation of the rheological properties of raw materials for the production of building materials. It is shown that the rheological properties of two-phase dispersed systems are determined mainly by the action of intermolecular forces in the liquid-filled contact zones of solid phase particles, and in three-phase systems – by the action of capillary coupling forces.

scholarly journals Mechanical Analysis of Asphalt Pavements with Alternative Materials in Manaus - Amazonas

2019 ◽  
Vol 7 (10) ◽  
pp. 646-662
Author(s):  
Marcilio Silva Almeida ◽  
Livia Da Silva Oliveira ◽  
David Barbosa de Alencar ◽  
Francisco Carlos Tavares Amorim
Keyword(s):  
Mechanical Analysis ◽  
Asphalt Mixtures ◽  
Construction And Demolition Waste ◽  
Asphalt Pavements ◽  
Demolition Waste ◽  
Petroleum Asphalt ◽  
Asphalt Cement ◽  
Alternative Materials ◽  
Stone Material ◽  
The Government

Pathologies in urban roads are common and recurring problems in the municipality of Manaus - AM, where defects have appeared early and successfully, especially the climatic condition of the differentiated region and the non-participation of the coarse aggregate in the asphaltic coating and sublayers. predominantly made of clay. Nevertheless, the Government often performs simple "hole-covering" operations to recover and restore such a structure, corroborating all the problems that trigger poor paving in the State Capital of Amazonas. Another challenge of the municipal administration is the disposal of construction waste, making it necessary to recycle it, highlighting the serious environmental problem caused by the extraction of the pebble. Aiming to contribute with alternatives the scarcity of stone material and the natural aggregate (pebble), substitute of gravel in the regional civil construction, it is proposed the use of construction and demolition waste (RCD). Asphalt concrete (AS) mixtures were made with recycled material, residual sand, portland cement, petroleum asphalt cement (CAP 50/70) and this binder modified with the addition of SBS (styrene and butadiene copolymer). Characterization tests were performed with aggregates, filler and petroleum asphalt cement (original and polymer), dosed by the Marshall method, and the asphalt mixtures were subjected to the Beam Fatigue Test at three different stress levels. The studies indicated satisfactory results of asphalt mixtures with the participation of RCD and SBS binder, compared to regional composites.

scholarly journals Implementation Of Permen Esdm No. 17/2012 As A Solution Between Mineral Businessesand Conservation Karst Zone In Indonesia

2019 ◽  
Vol 1 (1) ◽  
pp. 1-11
Author(s):  
Aris Dwi Nugroho ◽  
Tantan Hidayat ◽  
Muhammad Wachyudi Memed
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Water System ◽  
Mineral Resources ◽  
Silica Sand ◽  
Infrastructure Development ◽  
Karst Landscape ◽  
The Government ◽  
Materials Used ◽  
Scientific Value

Cement is powder made from lime and other materials used to make concrete, glue bricks or make walls (KBBI, 2008). Cement is a material that is hydraulic in nature, that is, a material which will undergo a hardening process in its mixing with water or acid solution. The raw materials for making cement include: clinker / slag of cement as much as 70% - 95% (the results of the combustion of limestone, silica sand, iron sand and clay), 5% gypsum and other additional materials (limestone, pozzolan, fly ash and etc). Along with the increase in infrastructure development which is the focus of the Government at this time, the need for building materials, especially cement, has increased. This increase in demand has made cement companies increase production, which in turn will also reduce the limestone reserves that exist in nature. Geological resources consist of mineral resources, energy resources, water resources, and landscapes.  Limestone  as  one  of  the  dominant  raw  materials  for  making  cement  is  a  mineral  and landscape resource that must be protected. The Ministry of Energy and Natural Resources since 2012 has issued regulations relating to the use and protection of Karst Landscape Areas (Permen ESDM No. 17 of2012). Protection of the Karst Landscape Area aims to protect its function as a natural regulator of the water system and its unique / scientific value in the development of science. Meanwhile, the delineation of utilization efforts as minerals and industrial raw materials is regulated so that it does not disturb the conservation zone. Expected with the regulations (Permen  ESDM No. 17 of 2012) can be a solution for the use and protection of the Karst Landscape in Indonesia.

scholarly journals Effective building materials using technogenic waste and mineral raw materials

2021 ◽  
Vol 340 ◽  
pp. 01003
Author(s):  
Liliya Berdnikova ◽  
Fedor Gorbunov ◽  
Andrey Lapin
Keyword(s):  
Compressive Strength ◽  
Building Materials ◽  
Bending Strength ◽  
Raw Materials ◽  
Slip Casting ◽  
Construction Materials ◽  
Mineral Raw Materials ◽  
Technogenic Waste ◽  
Wide Range ◽  
Dry Pressing

The results of research on the development of compositions of construction materials for structural purposes based on technogenic waste and mineral raw materials are presented. The possibility of obtaining materials with a wide range of operational properties by the methods of slip casting (compressive strength of the samples based on chamotte and sand is 53.0–95.9 and 50.0-69.5 MPa, bending strength is 8.1–16.5 and 8.5–15.3 MPa, abrasion is 0.2–0.36 and 0.15–0.39 g/cm2, respectively) and semi-dry pressing (compressive strength of the samples based on chamotte and sand are 19.1–43.5 and 18.3–32.6 MParespectively) isdemonstrated.

scholarly journals IMPLEMENTASI PERMEN ESDM NO. l7 TAHUN 20l2 SEBAGAI SOLUSI ANTARA PENGUSAHAAN MINERAL DAN PERLINDUNGAN KAWASAN KARST DI INDONESIA

2020 ◽  
Vol 1 (1) ◽  
pp. 847-862
Author(s):  
Aris Dwi Nugroho ◽  
Tantan Hidayat ◽  
Muhammad Wachyudi Memed
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Water System ◽  
Mineral Resources ◽  
Silica Sand ◽  
Infrastructure Development ◽  
Karst Landscape ◽  
The Government ◽  
Materials Used ◽  
Scientific Value

ABSTRAKSemen  adalah  serbuk atau tepung yang terbuat  dari kapur  dan material lainnya  yang dipakai  untuk membuat beton, merekatkan batu bata ataupun membuat tembok (Kamus Besar Bahasa Indonesia, 2008). Semen  merupakan  suatu  bahan  yang  bersifat  hidrolis,  yaitu  bahan  yang  akan  mengalami  proses pengerasan pada pencampurannya dengan air ataupun larutan asam. Bahan baku pembuatan semen antara lain : clinker/terak semen sebanyak 70% - 95% (hasil olahan pembakaran batu kapur, pasir silika, pasir besi dan tanah liat), gypsum 5% dan material tambahan lain (batu kapur, pozzolan, abu terbang dan lain- lain). Seiiring dengan peningkatan pembangunan insfrastruktur yang menjadi fokus Pemerintah saat ini, maka kebutuhan bahan baku bangunan khususnya semen mengalami peningkatan. Peningkatan kebutuhan ini membuat perusahaan semen meningkatkan produksi yang pada akhirnya juga akan mengurangi cadangan batugamping yang ada di alam. Sumber daya geologi terdiri atas sumber daya mineral, sumber daya energi, sumber daya air, dan bentang alam. Batugamping sebagai salah satu bahan baku dominan pembuatan semen merupakan sumber daya mineral dan bentang alam yang harus dilindungi. Kementerian Energi dan Sumber Daya Alam sejak tahun 2012 telah menerbitkan aturan terkait pemanfaatan dan perlindungan Kawasan Bentang Alam Karst (Permen ESDM N0. 17 Tahun 2012). Perlindungan terhadap Kawasan Bentang Alam Karst bertujuan untuk melindungi fungsinya sebagai pengatur alami tata air dan keunikan/nilai ilmiah dalam pengembangan ilmu pengetahuan. Sedangkan upaya pemanfaatan sebagai bahan galian maupun bahan baku industri diatur deliniasinya, sehingga tidak menganggu zona konservasi. Diharapkan dengan keluarnya Permen ESDM N0. 17 Tahun 2012 dapat menjadi solusi bagi pemanfaatan dan perlindungan Kawasan Bentang Alam Karst di Indonesia. Kata kunci: Sumber daya geologi, Semen, Kawasan Bentang Alam Karst  ABSTRACTCement is powder made from lime and other materials used to make concrete, glue bricks or make walls (KBBI, 2008). Cement is a material that is hydraulic in nature, that is, a material which will undergo a hardening process in its mixing with water or acid solution. The raw materials for making cement include: clinker I slag of cement as much as 70% - 95% (the results of the combustion of limestone, silica sand, iron sand and clay), 5% gypsum and other additional materials (limestone, pozzolan, fly ash and etc). Along with the increase in infrastructure development which is the focus of the Government at this time, the need for building materials, especially cement, has increased. This increase in demand has made cement companies increase production, which in turn will also reduce the limestone reserves that exist in nature. Geological resources consist of mineral resources, energy resources, water resources, and landscapes.  Limestone  as  one  of  the  dominant  raw  materials  for  making  cement  is  a  mineral  and landscape resource that must be protected.The Ministry of Energy and Natural Resources since 2012 has issued regulations relating to the use and protection of Karst Landscape Areas (Permen ESDM No. 17 of 2012). Protection of the Karst Landscape Area aims to protect its function as a natural regulator of the water system and its unique I scientific value in the development of science. Meanwhile, the delineation of utilization efforts as minerals and industrial raw materials is regulated so that it does not disturb the conservation zone. Expected with the regulations (Permen  ESDM No. 17 of 2012) can be a solution for the use and protection of the Karst Landscape in Indonesia. Keywords: Geological resources, Cement, Karst Landscape Area

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