Mechanical Properties of Build-Up Layers on Failed Ceramic Roller

2018 ◽  
Vol 784 ◽  
pp. 103-107
Author(s):  
Alica Mašlejová ◽  
Atila Drotár ◽  
Martin Černík ◽  
Pavol Zubko
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Residual Stresses ◽  
Amorphous Silica ◽  
Compression Strength ◽  
Thermal Load ◽  
Steel Strip ◽  
Degradation Process ◽  
Hardness Measurement ◽  
Ceramic Roller

The paper describes degradation process of ceramic rollers. Rollers behavior under mechanical and thermal load was evaluated using available methods like XRD, instrumented hardness measurement and compressive strength. The influence of residual stresses was also discussed. The first phase during the degradation crystalize from amorphous silica tridymite, cristobalite and quartz, then due to the contact and pressure of the steel strip to the surface roller iron diffuses and forms fayalite. Measured values of compression strength of roller of 55-61 MPa agree with producer documentation declared minimal values. Hardness and Young´s modulus of buildup phases identified from surface into depth were determined. Wüstite was present up to 100 mm, with hardness 6±1 GPa, Young´s modulus 75±6 GPa, fayalite, cristobalite, up to 500 mm, with hardness 5.4±0.6 GPa, Young´s modulus 51±2 GPa, tridymite over 500 mm, with the hardness 7±4 GPa and Young´s modulus 58±25 GPa.

Low Strength Self Compacting Concrete Compressive Strength Test

2013 ◽  
Vol 275-277 ◽  
pp. 2041-2044
Author(s):  
Feng Yan ◽  
Nan Pang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Compression Strength ◽  
Strength Test ◽  
The Self ◽  
Concrete Compressive Strength ◽  
Self Compacting Concrete ◽  
Intensity Index ◽  
Compressive Strength Test ◽  
Low Strength

In this paper,the mechanical properties were studied,the self compacting concrete cubic compression strength,prismatic compressive strength test,discussed two kinds of relationship between intensity index.

Research on Alkali-Activator and its Effects on Mechanical Properties of Slag-Based Geopolymer at early Age

2014 ◽  
Vol 556-562 ◽  
pp. 399-403 ◽  
Author(s):  
Li Shun Chen ◽  
Xiao Chen ◽  
Jian Tong Xu ◽  
Zhong Yang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Compression Strength ◽  
Downward Trend ◽  
Early Age ◽  
Strength Increase ◽  
Apparent Increase ◽  
Alkali Activator

This report studied the influence of effects such as type, modulus, dosage of the alkali-activator on mechanical properties of slag-based geopolymer. The analyzing results indicate that compare to the Na2SiO3, K2SiO3has significant activate effects on slag-based geopolymer. The modulus and dosage have obvious significance on early compression strength of slag-based geopolymer. With the increase of modulus, its early compression strength has apparent increase. With the increase of dosage, its early compression strength increase firstly and then decrease. When the dosage is 12%, the compression strength of the material is highest. The change of modulus and dosage of the alkali-activator has little influence on flexural strength of slag-based geopolymer. With the increase of dosage, its ratio of flexural to compressive strength has a downward trend. And the material brittleness addition.

scholarly journals Some Mechanical Properties of Cement Treated Base (CTB) Incorporating Waste Portland Cement Concrete Under Different Corresponding Conditions

2018 ◽  
Vol 7 (4.37) ◽  
pp. 138
Author(s):  
Asst. Prof. Dr. Khawla H. H. Shubber ◽  
Eng. Sajjad Hashim Mohamed
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Portland Cement ◽  
Granular Materials ◽  
Compression Strength ◽  
Cement Content ◽  
Strength Increase ◽  
Test Results ◽  
Portland Cement Concrete ◽  
Cement Concrete

This research represents a trial of understanding and improving mechanical properties of base or subbase granular materials, used in pavement construction, stabilized with Portland cement known as cement treated base (CTB) in terms of density, optimum water content (O.W.C), and compression Strength of three curing ages (3, 7, 28) days under different situations. Different Portland cement percent of (0, 5, 7, 10, 12, and 15) % by weight were added to selected base course granular materials (type B according to local standard specification in Iraq). Results showed that the density of mixture increase with increasing added cement percent, while O.W.C takes its maximum value around 7% cement content, and compression strength increase with increasing cement content and curing age. Then effect of replacing 50% of natural granular materials by waste Portland cement concrete (WPCC) was investigated on the results of (0, 7& 15)% cement content on density, O.W.C and compression strength in the three curing ages. Results reveled although density of mixture cooperating WPCC for 0% cement content was higher, CTB of natural granular material were denser. On the other hand compressive strength decrease in case of using WPCC for all percent cement added and curing ages. Finally, effect of soaking in water on CTB with (7 &15)% cement compressive strength of three curing ages was studied, under three period of soaking (1 week, 2 weeks, &one month). Test results exposed that, CTB Compressive strength increase with increasing soaking period but still less than that of un-soaked and for all curing ages. For each test stage mathematics relationships with acceptable correlation were presented proofing test results tendency.  

Study of Mechanical Properties and Development of Concrete Using Sludge from Textile Industry

2014 ◽  
Vol 798-799 ◽  
pp. 554-557
Author(s):  
M.E.D. Altidis ◽  
Crislene Rodrigues da Silva Morais ◽  
P.A. Rodrigues ◽  
L.M.S. Pereira ◽  
B.F.R. Guedes
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Water Absorption ◽  
Compression Strength ◽  
Textile Industry ◽  
Industrial Waste ◽  
Environmental Liability ◽  
Cure Time ◽  
Textile Sludge

The interest in the use of industrial waste, such as sludge, has grown as an alternative both to reduce the volume of this environmental liability as in getting a product to be used in construction. This work aims to study the incorporation of waste textile sludge in concrete. The textile sludge was dried, in an oven lab, at 110oC for twenty-four hours and milled in a grinder to acquire adequate granulometry. Samples were prepared for compression strength and water absorption, the ratios 1:2, 1:3, 1:4 and 1:5 with sludge levels of substitution of 3%, 5% and 7% with 7, 28 days of curing. The results showed a tendency to increase the water absorption with increasing amount of textile sludge and decrease one with increasing cure time. Thus for compressive strength decreased with increasing content of aggregates and content of this sludge, according to the following increasing order 1:5 <1:4 <1:3 <1:2.

scholarly journals Long Term Compression Strength of Mortars Produced Using Coarse Steel Slag as Aggregate

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Erika Furlani ◽  
Stefano Maschio
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Compression Strength ◽  
Steel Slag ◽  
Alkali Silica Reaction ◽  
Steelmaking Slag ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Long Time

The paper reports on some experimental results obtained from the production of mortars prepared using a commercial cement, coarse steelmaking slag, superplasticizer, and water. The behaviour of this reference composition was compared to that of some others containing further additives in order to investigate materials compressive strength after long time ageing. It has been demonstrated that an optimized water/cement ratio coupled with slag particles of size lower than 2.5 mm and proper protocol of preparation leads to the production of materials with good mechanical properties after 28, 90, and 180 days of ageing. The resulting materials therefore appeared as good candidates for civil engineering applications. However, the present research also demonstrates that the mortar samples of all of the compositions prepared suffer from decay and compressive strength decrease after long time ageing in water. In the present paper the results are explained taking account of materials residual porosity and alkali silica reaction which occurs in the samples.

Application of Pozzolan as Materials of Geopolymer Paste

2016 ◽  
Vol 841 ◽  
pp. 111-117 ◽  
Author(s):  
Desak Nyoman Deasi Triani ◽  
Januarti Jaya Ekaputri ◽  
Triwulan ◽  
Setyo Hardono ◽  
Tri Eddy Susanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fire Resistance ◽  
Amorphous Silica ◽  
Mix Design ◽  
Research Use ◽  
Strength Increase ◽  
Alkali Activator ◽  
Geopolymer Paste

This research use metakaolin and clay containing amorphous silica and alumina after calcination at 700°C. Mechanical properties and fire resistance of geopolymer paste increase as the ratio of silica to alumina. Mix design composition on this research based on the ratio of silica to alumina. The ratio of silica to alumina for metakaolin paste are 1.4 and 1.8. While for clay paste the ratio that used are 2.8 and 3.2. Na2SiO3 and NaOH with 10 M and 8 M were used as alkali activator at this research. Based on analysis the effect of increasing the ratio of silica to alumina increase fire resistance ability for both metakaolin and clay. However initial compressive strength is effected not only by ratio of silica to alumina but also the ratio of water to solid and SiO2/Na2O. The compressive strength decrease as the ratio of water to solid increases. Meanwhile compressive strength increase as the ratio of SiO2/Na2O increase.

scholarly journals PENENTUAN MORFOLOGI PERMUKAAN, SIFAT FISIS DAN MEKANIK BERDASARKAN PRESENTASE KOMPOSISI BAHAN CAMPURAN BATAKO

2018 ◽  
Vol 3 (1) ◽  
pp. 59-68
Author(s):  
Selfiana Missa ◽  
Minsyahril Bukit ◽  
Andreas Christian Louk
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Data Analysis ◽  
Surface Morphology ◽  
Water Absorption ◽  
Compression Strength ◽  
Test Specimen ◽  
Physical And Mechanical Properties ◽  
Drying Process

ABSTRAK Telah dilakukan penelitian tentang kajian Morfologi Permukaan, Sifat Fisik dan Mekanik Batako dengan presentase komposisi bahan campuran batako. Penelitian ini dilakukan dengan menggunakan material tanah putih dan pasir. Selanjutnya bahan material dicampur dengan semen dengan variasi material 1:5, 1:6, 1:7, 1:8 dan 1:9. Kemudian dicetak dengan cara, pemadatan dan pengeringan. Setelah proses pengeringan dilakukan pengujian karakteristik sifat fisik dan mekanik benda uji berupa: uji kuat tekan (compression strength), densitas (density), porositas dan karakterisasi SEM. Berdasarkan analisis data, batako yang memiliki nilai densitas untuk variasi campuran tanah putih 665 mesh 2,05 gr/cm3, 2,04 gr/cm3dan 1,99 gr/cm3. Pada variasi campuran tanah putih 114 mesh 2,16 gr/cm3, 2,14 gr/cm3dan 2,05 gr/cm3. Untuk variasi campuran pasir 665 mesh 2,04 gr/cm3, 1,89 gr/cm3dan 2,11 gr/cm3. Untuk variasi campuran pasir 114 mesh 2,05 gr/cm3, 2,11 gr/cm3dan 2,02 gr/cm3.kuat tekan batako pada variasi campuran tanah putih 114 meshsebesar 20 kg/cm² memenuhi standar kuat tekan minimum mutu  IV. Sedangkan untuk porositas pada variasi campuran 1:6 dan 1:8 memenuhi standar penyerapan air pada mutu I dan mutu II. Kata kunci: Tanah putih, pasir, densitas, penyerapan air, kuat tekan dan SEM. ABSTRACT A research of determination of surface morphology, physical properties and mechanical properties of brick based on the composition of the mixture has been done. This research was done by using material of white soil and sand. Then Materials are mixted with cement with materials variation 1:5, 1:6, 1:7, 1:8 dan 1:9. Than each one was molded by means of compaction and drying.  After drying process the physical and mechanical properties of the test specimen is done in the form of compression test, density, porosity, and SEM characterization. Based on data analysis, brick with mixed variation of white soil of 665 mesh has the density value of 2,05 gr/cm3, 2,04 gr/cm3 dan 1,99 gr/cm3. For brick with mixed variation of white soilof 114 mesh has the density value are 2,16 gr/cm3, 2,14 gr/cm3dan 2,05 gr/cm3. For brick with mixed variation of sand of 665 mesh has the density value are 2,04 gr/cm3, 1,89 gr/cm3 dan 2,11 gr/cm3. For brick with mixed variation of sand of 114 mesh has the density value are 2,05 gr/cm3, 2,11 gr/cm3dan 2,02 gr/cm3. Compressive strength of brick with mixed variation of white soil of 114 mesh is 20 kg/cm² meet the minimum compressive strength standard of quality IV. While for the porosity of brick with mixed variation of 1:6 and 1:8 meet the standards of water absorption standard of quality I and quality II. Key Words : White  Soil,  sand,  density,  water  absorption,  Compressive  strength,  and  SEM

Effect of combined drink cans and steel fibers on the impact resistance and mechanical properties of concrete

2020 ◽  
Vol 14 (2) ◽  
pp. 6734-6742
Author(s):  
A. Syamsir ◽  
S. M. Mubin ◽  
N. M. Nor ◽  
V. Anggraini ◽  
S. Nagappan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Impact Resistance ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Indirect Tensile ◽  
The Impact

This study investigated the combine effect of 0.2 % drink cans and steel fibers with volume fractions of 0%, 0.5%, 1%, 1.5%, 2%, 2.5% and 3% to the mechanical properties and impact resistance of concrete. Hooked-end steel fiber with 30 mm and 0.75 mm length and diameter, respectively was selected for this study.  The drinks cans fiber were twisted manually in order to increase friction between fiber and concrete. The results of the experiment showed that the combination of steel fibers and drink cans fibers improved the strength performance of concrete, especially the compressive strength, flexural strength and indirect tensile strength. The results of the experiment showed that the combination of steel fibers and drink cans fibers improved the compressive strength, flexural strength and indirect tensile strength by 2.3, 7, and 2 times as compare to batch 1, respectively. Moreover, the impact resistance of fiber reinforced concrete has increase by 7 times as compared to non-fiber concretes. Moreover, the impact resistance of fiber reinforced concrete consistently gave better results as compared to non-fiber concretes. The fiber reinforced concrete turned more ductile as the dosage of fibers was increased and ductility started to decrease slightly after optimum fiber dosage was reached. It was found that concrete with combination of 2% steel and 0.2% drink cans fibers showed the highest compressive, split tensile, flexural as well as impact strength.    

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

Incorporation of Iraqi Rocks in the Production of Eco-Friendly Cement Mortar

2020 ◽  
Vol 38 (10A) ◽  
pp. 1522-1530
Author(s):  
Rawnaq S. Mahdi ◽  
Aseel B. AL-Zubidi ◽  
Hassan N. Hashim
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Structural Properties ◽  
Mechanical Milling ◽  
Cement Mortar ◽  
Cement Mortars

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable for construction applications. Kaolin is found to have a greater effect on the mechanical properties, water absorption, and thermal conductivity of the mortars than Flint. This behavior is discussed and analyzed based on the compositional and structural properties of the rocks powders.

Sign in / Sign up

Export Citation Format

Share Document