scholarly journals UJI KUAT TEKAN DAN KUAT TARIK BELAH PADA BETON DENGAN SERAT KAWAT NYAMUK PADA MUTU FC’ = 19,3 MPA

2019 ◽  
Vol 14 (1) ◽  
pp. 30
Author(s):  
Handika Setya Wijaya ◽  
Adrianus Tandi
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Construction Materials ◽  
High Strength ◽  
Primary Data ◽  
Concrete Compressive Strength ◽  
Irrigation Channels ◽  
Concrete Quality ◽  
Compressive Strength Of Concrete

Concrete is one of the construction materials that is currently widely used by the community to build buildings. This is evidenced by the large number of construction of buildings, roads, irrigation channels and other construction. Until now, Indonesian people still use a little concrete. The problem that we want to know is how the effect of adding mosquito wire fiber to compressive strength, tensile strength and elastic modulus of concrete using concrete quality fc '= 19.3 MPa. The purpose of this study is to add additional mosquito wire fiber can be used as an added component of concrete components that have high strength and good quality but are economically valuable for compressive strength, tensile strength and elastic modulus. The method used is secondary and primary data. The results of this study are compressive strength 0% = 15,839 MPa, 1% = 13,657 MPa, 3% = 10,137 MPa, 5% = 9,173 MPa, tensile strength 0% = 7,392 MPa, 1% = 8,205 MPa, 3% = 8,504 MPa, 5% = 9,038 MPa. and elastic modulus 0% = 29131,385 N / mm2, 1% = 14575.68 N / mm2, 3% = 10303,133 N / mm2, 5% = 7030,893 N / mm2. The results of this study found that the addition of mosquito wire fiber can reduce the compressive strength of concrete and modulus. While the tensile strength and modulus of elasticity increase. So that the mosquito wire is not suitable for concrete compressive strength and elastic modulus.

Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

2018 ◽  
Vol 9 (2) ◽  
pp. 67-73
Author(s):  
M Zainul Arifin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Curing Temperature ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Astm Method ◽  
Additive Type ◽  
Composition Variation ◽  
Compressive Strength Of Concrete

This research was conducted to determine the value of the highest compressive strength from the ratio of normal concrete to normal concrete plus additive types of Sika Cim with a composition variation of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1 , 50% and 1.75% of the weight of cement besides that in this study also aims to find the highest tensile strength from the ratio of normal concrete to normal concrete in the mixture of sika cim composition at the highest compressive strength above and after that added fiber wire with a size diameter of 1 mm in length 100 mm with a ratio of 1% of material weight. The concrete mix plan was calculated using the ASTM method, the matrial composition of the normal concrete mixture as follows, 314 kg / m3 cement, 789 kg / m3 sand, 1125 kg / m3 gravel and 189 liters / m3 of water at 10 cm slump, then normal concrete added variations of the composition of sika cim 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.5%, 1.75% by weight of cement and fiber, the tests carried out were compressive strength of concrete and tensile strength of concrete, normal maintenance is soaked in fresh water for 28 days at 30oC. From the test results it was found that the normal concrete compressive strength at the age of 28 days was fc1 30 Mpa, the variation in the addition of the sika cim additive type mineral was achieved in composition 0.75% of the cement weight of fc1 40.2 Mpa 30C. Besides that the tensile strength test results were 28 days old with the addition of 1% fiber wire mineral to the weight of the material at a curing temperature of 30oC of 7.5%.

scholarly journals Pengaruh Abu Arang Sebagai Campuran Beton Ditinjau Dari Kuat Tekan

Teknika ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. 16
Author(s):  
Hani Purwanti ◽  
Galih Widyarini
Keyword(s):  
Compressive Strength ◽  
Potassium Silicate ◽  
Partial Replacement ◽  
Concrete Compressive Strength ◽  
Main Ingredient ◽  
Concrete Material ◽  
Concrete Mix ◽  
Concrete Quality ◽  
Cement Mixture ◽  
Compressive Strength Of Concrete

<p align="center"><strong><em>Abstract</em></strong></p><p><em>Cement which is the main ingredient in making concrete contains non-renewable natural ingredients, potassium silicate. This causes an increase in cement prices every year. In overcoming these problems, there needs to be a modification in concrete mixes that are more environmentally friendly. Mixtures that are able to reduce the need for cement and contain potassium silicate such as charcoal are selected in modified concrete mix material by reviewing compressive strength. The purpose of this study was to determine how much influence the composition of charcoal as a substitute for cement in the preparation of concrete material was observed from compressive strength. The composition of the cement mixture will be replaced with charcoal by 0%, 5% and 10% with concrete compressive strength which is expected to have K200 quality. The research method uses an experimental method for sampling data. There are 3 (three) specimens in each percentage of addition of charcoal. The results of concrete compressive strength with a concrete age of 7 days, 22 days and 28 days under normal conditions without mixture are 31 Mpa, 35 Mpa, and 38 Mpa. The compressive strength of concrete mixed with charcoal as much as 5% is 30 Mpa, 31 Mpa, 36 Mpa. In 10% charcoal mixed concrete is 20 MPa, 27 MPa, and 29 MPa. The results of the compressive strength of the three conditions each showed a decrease in the trend of concrete age 7 days, 21 days and 28 days. Even though the trend has decreased, the compressive strength of the concrete produced still meets K200. This shows that charcoal ash can be used as an alternative to a partial replacement of cement in the concrete mixture for K200 concrete quality.</em></p><p align="center"> </p><p align="center"><strong>Abstrak</strong></p><p>Semen yang merupakan bahan utama pembuatan beton mengandung bahan dasar alam yang tidak dapat diperbarui yaitu kalium silikat. Hal ini menyebabkan adanya peningkatan harga semen setiap tahun. Dalam mengatasi permasalahan tersebut, perlu adanya suatu modifikasi pada campuran beton yang lebih ramah lingkungan. Bahan campuran yang mampu mengurangi kebutuhan semen serta mengandung kalium silikat seperti abu arang dipilih dalam bahan campuran beton modifikasi dengan meninjau kuat tekan.Tujuan penelitian ini adalah untuk mengetahui seberapa besar pengaruh komposisi abu arang sebagai pengganti semen dalam penyusunan material beton ditinjau dari kuat tekan. Adapun komposisi campuran semen yang akan digantikan dengan abu arang sebesar 0%, 5% dan 10% dengan kuat tekan beton yang diharapkan memiliki mutu K200. Adapun metode penelitian ini menggunakan metode eksperimen untuk pengambilan sampel data. Terdapat masing – masing 3 (tiga) benda uji di setiap persentase penambahan abu arang.Hasil kuat tekan beton dengan usia beton 7 hari, 22 hari dan 28 hari dalam kondisi normal tanpa campuran adalah 31 Mpa, 35 Mpa, dan 38 Mpa. Kuat tekan beton yang dicampur abu arang sebanyak 5 % adalah 30 Mpa, 31 Mpa, 36 Mpa. Pada beton campuran abu arang 10% adalah 20 Mpa, 27 Mpa, dan 29 Mpa. Hasil kuat tekan dari ketiga kondisi tersebut masing – masing menunjukkan adanya penurunan trend dari usia beton 7 hari, 21 hari dan 28 hari. Walaupun trend mengalami penurunan, akan tetapi nilai kuat tekan beton yang dihasilkan masih memenuhi K200.Hal tersebut menunjukkan bahwa abu arang dapat digunakan sebagai alternatif pengganti sebagian semen pada campuran beton untuk mutu beton K200.</p><p> </p>

scholarly journals Mechanical Behavior of Recycled Fine Aggregate Concrete with High Slump Property in Normal- and High-Strength

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Minkwan Ju ◽  
Kyoungsoo Park ◽  
Won-Jun Park
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Mechanical Behavior ◽  
High Strength ◽  
Strength Development ◽  
Fine Aggregate ◽  
Structural Concrete ◽  
Aggregate Concrete ◽  
Model Code

AbstractThis study investigated the mechanical behavior of normal strength (NS) and high strength (HS) concrete containing recycled fine aggregates (RFAs). A high slump mixing design was employed, which may be potentially used as filled structural concrete. The compressive strength, tensile strength, and elastic modulus were measured according to the RFA replacement ratio and curing time. In addition, the shrinkage strain was measured in a temperature and humidity chamber over 260 days. The compressive strength and elastic modulus of RFA concrete were approximately 70–90% of those of virgin concrete. The decreases in the compressive strength and elastic modulus for NS concrete were larger than those for HS concrete. This could be explained by the difference in failure mechanism between NS and HS concrete. The average ratio of the compressive strength at 190 days to that at 28 days was 1.15–1.3, and the ratio of the tensile strength at 190 days to that at 28 days was 1.15–1.25. These demonstrate good strength development. The ratios between the elastic modulus and compressive strength for RFA concrete were dissimilar to those for virgin concrete but similar to those for recycled coarse aggregate concrete. ACI 318-14 (Building code requirements for structural concrete and commentary, 2014) and Model Code (Fib model code for concrete structures, 2010) overestimated the elastic modulus of RFA concrete. Therefore, this study suggested an empirical expression to approximate the elastic modulus of RFA concrete. The increase in shrinkage owing to the use of RFA was at most 5–6% of the ultimate compressive strain of concrete.

scholarly journals Effects of Single and Hybrid Steel Fiber Lengths and Fiber Contents on the Mechanical Properties of High-Strength Fiber-Reinforced Concrete

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Kyoung-Chul Kim ◽  
In-Hwan Yang ◽  
Changbin Joh
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Steel Fiber ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Experimental Parameters ◽  
High Strength Fiber

This paper describes an experimental study on the mechanical properties of high-strength fiber-reinforced concrete (HSFRC). The experimental parameters included the content and length of the steel fiber as well as the use of either a single-type fiber or hybrid steel fibers. The steel fiber contents were 1.0, 1.5, and 2.0% based on the volume of HSFRC, and the steel fiber lengths were 13, 16.5, and 19.5 mm. In addition, hybrid steel fibers incorporating steel fibers of different lengths were used. Compression tests and crack mouth opening displacement tests were performed for each HSFRC mixture with different experimental parameters. The mechanical properties of the HSFRC, such as compressive strength, elastic modulus, and tensile strength, increased with the steel fiber content. The mechanical property results of the HSFRC mixture using a single fiber length of 13 mm were greater than the results of the other mixtures. The compressive strength, elastic modulus, and tensile strength of the HSFRC mixture with hybrid steel fibers were similar to those of the mixtures with a single length of steel fiber. Additionally, based on the test results of the material properties, equations for predicting the elastic modulus and tensile strength of the HSFRC were suggested; the predictions using the proposed formula closely agreed with the experimental results.

Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

2018 ◽  
Vol 9 (2) ◽  
pp. 67-73
Author(s):  
M Zainul Arifin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Curing Temperature ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Astm Method ◽  
Additive Type ◽  
Composition Variation ◽  
Compressive Strength Of Concrete

This research was conducted to determine the value of the highest compressive strength from the ratio of normal concrete to normal concrete plus additive types of Sika Cim with a composition variation of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1 , 50% and 1.75% of the weight of cement besides that in this study also aims to find the highest tensile strength from the ratio of normal concrete to normal concrete in the mixture of sika cim composition at the highest compressive strength above and after that added fiber wire with a size diameter of 1 mm in length 100 mm with a ratio of 1% of material weight. The concrete mix plan was calculated using the ASTM method, the matrial composition of the normal concrete mixture as follows, 314 kg / m3 cement, 789 kg / m3 sand, 1125 kg / m3 gravel and 189 liters / m3 of water at 10 cm slump, then normal concrete added variations of the composition of sika cim 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.5%, 1.75% by weight of cement and fiber, the tests carried out were compressive strength of concrete and tensile strength of concrete, normal maintenance is soaked in fresh water for 28 days at 30oC. From the test results it was found that the normal concrete compressive strength at the age of 28 days was fc1 30 Mpa, the variation in the addition of the sika cim additive type mineral was achieved in composition 0.75% of the cement weight of fc1 40.2 Mpa 30C. Besides that the tensile strength test results were 28 days old with the addition of 1% fiber wire mineral to the weight of the material at a curing temperature of 30oC of 7.5%.

scholarly journals THE EFFECT OF MODIFIED ADDITIVES ON STRENGTH AND FROST RESISTANCE IN FIBROUS CONCRETE OF RIGID ROAD PAVEMENTS

2020 ◽  
pp. 68-74
Author(s):  
A.V. Mishutin ◽  
◽  
L. Chintea ◽  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Portland Cement ◽  
Frost Resistance ◽  
Polypropylene Fiber ◽  
High Strength ◽  
Fibrous Concrete ◽  
Fiber Concrete ◽  
Mineral Additive ◽  
Compressive Strength Of Concrete

Abstract. The research is devoted to the development of compositions of modified fiber concrete of rigid road pavements with high strength and frost resistance through the use of metakaolin and a polycarboxylate type superplasticizer. The compressive strength, tensile strength under bending and frost resistance of concrete and fiber concrete of rigid road pavements were investigated according to the 4-factor optimal plan. In the experiment the amount of concrete components varied: Portland cement, polypropylene fibers, metakaolin, the polycarboxylate type additives Coral ExpertSuid-5. All mixtures had equal mobility P2 and their W/C depended on the composition of concrete. The use of polypropylene fiber and metakaolin necessitates an increase of W/C to maintain the mobility of the mixture. Increasing the amount of Coral ExpertSuid-5 additive in concrete to 0.9-1% allows to reduce significantly W/C of the mixture. Metakaolin as an active mineral additive increases the compressive strength and tensile strength of concrete. Rational in terms of increasing strength is the amount of metakaolin at the level of 20..22 kg/m3. With an increase in the amount of Coral ExpertSuid-5 additive to 0.9..1% due to a decrease of W/C, the compressive strength of concrete increases by 5..7 MPa, and the tensile strength increases by about 0.5 MPa. Due to the introduction of polypropylene fiber, the tensile strength of concrete in bending increases by 0.6..0.9 MPa. But dispersed reinforcement does not affect the compressive strength of concrete. The developed fiber concrete using a rational amount of modifiers, depending on the amount of Portland cement in the composition, has a compressive strength from 55 MPa to 70 MPa and tensile strength from 8 MPa to 9.5 MPa. The high strength of fiber-reinforced concretes allows their use in road pavements with the highest load. Frost resistance of concrete increases by 50 cycles or more when using fiber in an amount of 1.5-2 kg/m3. Due to the use of a rational amount of modifiers (0.8-1% Coral ExpertSuid-5 additive and 15-20 kg/m3 metakaolin), frost resistance of concrete and fiber concrete increases by 50-100 cycles. The developed modified fiber concretes of rigid road pavements depending on the amount of Portland cement in the composition have frost resistance from F350 to F450, which ensures their sufficient durability.

Investigation of Physical and Mechanical Properties of Construction Materials of Forced Carbonate Hardening

2018 ◽  
Vol 931 ◽  
pp. 475-480 ◽  
Author(s):  
Nikolay V. Lyubomirskiy ◽  
Stanisław Fic ◽  
Sergey I. Fedorkin
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Building Materials ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Building Products ◽  
Technological Factors ◽  
Dry Pressing

A technique for determining the modulus of elasticity of сonstruction materials on samples of small dimensions has been developed. Physical and mechanical properties of building materials based on calcareous-lime compositions of semi-dry pressing, hardening according to the principle of forced carbonization, depending on the prescription and technological factors of their production have been studied. It has been demonstrated that on the basis of these materials it is possible to obtain building products with compressive strength up to 30 MPa, tensile strength at bending up to 5 MPa and higher, and an elastic modulus up to 18 GPa.

scholarly journals Review Kuat Tekan Beton Polos dari Perspektif Mekanika Fraktur

2018 ◽  
Vol 3 (2) ◽  
pp. 122
Author(s):  
Danang Murdiyanto ◽  
Benedictus Sonny Yoedono ◽  
Agnes Hanna Patty
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
High Strength ◽  
Concrete Compressive Strength ◽  
Interface Zone ◽  
The Matrix ◽  
The Difference ◽  
Zone Characteristic ◽  
The Moment ◽  
Energy Principles

Concrete is a discreet material that consist of aggregate as filler and cement paste (matrix) as binder. Both of them work together as a composite or monolithic mechanism, depends on the interface zone characteristic that developed by aggregate. Monolithic mechanism leading to failure catastrophically (brittle and instantly), while composite mechanism prevails failure occurs gradually. Monolithic mechanism maybe found in high strength concrete where hardness and stiffness of aggregate are compatible with their matrix. At the moment when the matrix tensile strength (ft) is reached. The cracks will propagate quickly cutting both aggregates and matrix, as well at once. Contrary to the composite condition, when the matrix tensile strength is reached, the aggregate will take over the load and the crack will propagate through the interface zone. The perspective of fracture mechanics and the failure parameters explain the mechanism of crack propagation based on the energy principles. This investigation reviews the phenomenon of concrete compressive strength with angular aggregates compared to rounded aggregates on cylindrical specimens with diameter (d) 15 cm and height (h) 30 cm of the same compressive strength.  The difference between them, shows the tendency of the influence of the interface zone as traction, which significantly contributes to the performance capacity before  collapse

MEEHANITE GB300

Alloy Digest ◽  
2020 ◽  
Vol 69 (11) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Gray Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Test Pieces ◽  
Temperature Performance

Abstract Meehanite GB300 is a pearlitic gray cast iron that has a minimum tensile strength of 300 MPa (44 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. This grade exhibits high strength while still maintaining good thermal conductivity and good machinability. It is generally used for applications where the thermal conductivity requirements preclude the use of other higher-strength materials, such as spheroidal graphite cast irons, which have inferior thermal properties. This datasheet provides information on physical properties, hardness, tensile properties, and compressive strength as well as fatigue. It also includes information on low and high temperature performance as well as heat treating, machining, and joining. Filing Code: CI-75. Producer or source: Meehanite Metal Corporation.

scholarly journals Clay-Based Products Sustainable Development: Some Applications

2021 ◽  
Vol 13 (3) ◽  
pp. 1364
Author(s):  
Michele La Noce ◽  
Alessandro Lo Faro ◽  
Gaetano Sciuto
Keyword(s):  
Sustainable Development ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Basalt Fibers ◽  
Future Studies ◽  
Clay Bricks ◽  
Brick Powder ◽  
Alkaline Resistance ◽  
Raw Earth

Clay has a low environmental impact and can develop into many different products. The research presents two different case studies. In the first, the clay is the binder of raw earth doughs in order to produce clay-bricks. We investigate the effects of natural fibrous reinforcements (rice straws and basalt fibers) in four different mixtures. From the comparison with a mix without reinforcements, it is possible to affirm that the 0.40% of basalt fibers reduce the shrinkage by about 25% and increase the compressive strength by about 30%. Future studies will focus on identifying the fibrous effects on tensile strength and elastic modulus, as well as the optimal percentage of fibers. In the second study, the clay, in form of brick powder (“cocciopesto”), gives high alkaline resistance and breathability performance, as well as rendering and color to the plaster. The latter does not have artificial additives. The plaster respects the cultural instance of the original building. The research underlines how the use of a local (and traditional) material such as clay can be a promoter of sustainability in the contemporary building sector. Future studies must investigate further possible uses of clay as well as a proper regulatory framework.

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