scholarly journals Modifikasi Cara Penentuan Kandungan Pasir pada Perancangan Campuran Beton Cara SNI dengan Metode Dreux Gorrise. (Hal. 21-32)

2019 ◽  
Vol 5 (4) ◽  
pp. 21
Author(s):  
Admiral Hazel Rabbani ◽  
Priyanto Saelan
Keyword(s):  
Compressive Strength ◽  
Test Results ◽  
Volume Level ◽  
Modified Test ◽  
Made In ◽  
Fineness Modulus

ABSTRAK Pencampuran beton cara SNI menunjukkan bahwa kuat tekan hanya dipengaruhi oleh faktor air-semen, sedangkan jika dievaluasi dengan metode Dreux Gorisse diduga akan menghasilkan kuat tekan yang berbeda karena kuat tekan juga dipengaruhi oleh volume pasir. Modifikasi sedemikian rupa pada penentuan pasir dalam agregat gabungan pada cara SNI agar tidak mempengaruhi kuat tekan beton yang akan dihasilkan, dilakukan dengan cara Dreux Gorisse. Pengujian yang dilakukan menggunakan agregat maksimum 10 mm dan 20 mm, slump rencana 30-60 mm dan 60-180 mm. Modulus kehalusan pasir yang ditinjau adalah 1,5; 2,0; 2,5; 3,0; dan 3,5. Hasil pengujian modifikasi menggunakan agregat maksimum 10 mm dengan slump 30-60 mm dan slump 60-180 mm pada modulus kehalusan pasir 1,5; 2,0; dan 2,5 membuktikan kuat tekan beton tidak dipengaruhi oleh kadar volume pasir. Pada pengujian modifikasi menggunakan agregat maksimum 20 mm dengan slump 30-60 mm dan slump 60-180 mm pada modulus kehalusan pasir 1,5; 2,0; dan 2,5 membuktikan juga bahwa kuat tekan beton tidak dipengaruhi oleh kadar volume pasir. Kata kunci: modulus kehalusan pasir, volume pasir, SNI, kuat tekan ABSTRACT Concrete mixing with the SNI method shows that compressive strength is only influenced by water-cement factors, whereas if evaluated by the Dreux Gorisse method it is assumed that the compressive strength value will be different because the compressive strength is also influenced by the volume of sand. Modifications are made in such a way as to the determination of sand in the combined aggregate on the SNI method so as not to affect the compressive strength of the concrete to be produced by Dreux Gorisse. Tests carried out using a maximum aggregate of 10 mm and 20 mm, slump plans are used 30-60 mm and 60-180 mm. The modulus of sand smoothness reviewed was 1.5, 2.0, 2.5, 3.0 and 3.5. The modified test results using a maximum aggregate of 10 mm with 30-60 mm slump and 60-180 mm slump on sand fineness modulus 1,5, 2,0, and 2,5 prove that the compressive strength of the concrete is not affected by the sand volume level. In testing the modification using a maximum aggregate of 20 mm with 30-60 mm slump and 60-180 mm slump on sand smoothness modulus of 1.5, 2.0, and 2.5 also prove that the compressive strength of the concrete is not affected by the volume level of the sand. Keywords: sand fineness modulus, sand volume, SNI, compressive strength

Effect of white soil substitution on fly ash based mortar geopolymers with sodium hydroxide activator

2020 ◽  
Vol 26 (1) ◽  
pp. 9-16
Author(s):  
Yulita Arni Priastiwi ◽  
Arif Hidayat ◽  
Dwi Daryanto ◽  
Zidny Salamsyah Badru
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Moisture Content ◽  
Sodium Hydroxide ◽  
Modulus Of Elasticity ◽  
Physical And Mechanical Properties ◽  
Test Results ◽  
Alkaline Activator ◽  
Made In

The presence of white soil in a geopolymer mortar affects the physical and mechanical properties of the mortar itself, especially in compressive strength, density and modulus of elasticity produced. Geopolymer mortar composed of fly ash, sand, water, and NaOH which acts as an alkaline activator compared to mortar from the same material, but white soil from Kupang is added as a substitution of fly ash. Specimens are made in six variations. Geopolymer mortar composers using a ratio of 1 binder: 3 sand with w/b of 0.5. Binder composed of fly ash with white soil substitution of 0; 5; 10; 15; 20 and 30% by weight of fly ash. An activator NaOH 8M solution was added to the mixture. Both white soil and fly ash pass of sieve no. 200 with a moisture content of 0%. Mortar made measuring 5x5x5 cm. The mortar was treated by the oven of method at 60 oC for 24 hours until the mortar does not change in weight. The test results show geopolymer mortar with 15% substitution of white soil to fly ash has the highest compressive strength, density and modulus of elasticity among other variations. In all mortar variations, compressive strength at 14 days has reached 75% of strength at 28 days.

scholarly journals Sifat Mekanis Beton Normal dengan Campuran Tepung Marmer

2018 ◽  
Vol 24 (1) ◽  
pp. 71
Author(s):  
Widodo Kushartomo ◽  
Dewi Permata Sari
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Cylindrical Specimen ◽  
Concrete Mixture ◽  
Beam Specimen ◽  
Test Results ◽  
Normal Concrete ◽  
Split Tensile Strength ◽  
Made In

This study is describe about the mechanical properties of normal concrete by adding of marble flour based on the mixed plan made. The compressive strength of the planned test object fc '20.0 and fc' 30.0 MPa was prepared by using the ACI method. The addition of marble flour in a concrete mixture varies from 0%, 5%, 10%, 15%, 20% and 25% to the weight of the cement used. Concrete test specimens were made in the form of cylinders 15.0 cm in diameter, 30.0 cm in height and made in the form of concrete beams measuring 15.0 cm x 15.0 cm x 75.0 cm, the type of mechanical testing performed in the form of compressive strength tests on cylindrical specimen, split tensile strength test on cylindrical specimen and flexure test on beam specimen. Curing is done by immersion technique at 25ºC and the test is done when the concrete is 28 days old. The test results show that the addition of marble flour to the normal concrete mixture can increase its mechanical properties by 26% for compressive strength, 24% for split tensile strength, and 17% for flexural strength. 

scholarly journals Pemanfaatan Limbah Plastik Polyethylene Terephthalate Sebagai Pengganti Agregat Halus Dalam Pembuatan Paving Block

2021 ◽  
Vol 21 (3) ◽  
pp. 526-531
Author(s):  
Andika Surya ◽  
Dedi Arham Al Anzari ◽  
Ana Juniarti ◽  
Arman Setiawan
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Confidence Level ◽  
Construction Material ◽  
Plastic Waste ◽  
Narrative Review ◽  
Test Results ◽  
Additional Material ◽  
Made In

Penelitian ini mempunyai kelebihan diantaranya mampu menjadi salah satu alternatif untuk mengurangi jumlah sampah plastik jenis PET sebagai salah satu bahan kontruksi yaitu paving block yang ramah lingkungan dan dapat digunakan sebagai pengerasan jalan, taman maupun pelataran parkir. Paving block adalah suatu komposisi bahan bangunan yang terbuat dari campuran semen portland atau bahan perekat hidrolis lainnya, air dan agregat dengan atau tanpa bahan tambahan lainnya yang tidak mengurangi mutu beton tersebut (SNI 03-0691-1996). Komposisi paving block yang akan dibuat pada karya ini terdiri dari semen portland,pasir,limbah plastik dan air sebagai campuran yang akan direncanakan pada perancangan pembuatan paving block. Masyarakat belum banyak mengetahui bahwasanya plastik juga bisa dijadikan salah satu bahan kontruksi dengan menjadi bahan tambahan. Paving block dengan plastik ini tidak bisa diragukan kekuatannya seperti paving block pada umumnya. Karena dari penelitian sebelumnya menunjukkan bahwa paving block dengan menggunakan serat yang terdapat pada plastik dapat meningkatkan kuat tekan pada paving. Hasil uji menunjukkan bahwa hasil paving block campuran 1: 3 dengan kuat tekan paving normal 18.07 Mpa dan paving block campuran 1:6 dengan kuat tekan paving normal 11.32 MPa maka dapat diperkirakan hasil narrative review yang sesuai penelitian kami adalah sebagai berikut, pada paving block komposisi 1: 4, kuat tekan target yang terjadi direncanakan sebesar 15 Mpa dan paving block kompisisi 1:5 kuat tekan target rencana direncanakan sebesar 13 Mpa dengan tingkat kepercayaan data R = 0.9798 dari penggambungan data sebelumnya,Dengan penggunaan subtitusi plastic terhadap pasir, maka ditargetkan akan terjadi peningkatan kuat tekan sebesar 30% dari paving block tanpa penggunaan plastic di komposisi subtitusi plastic sebesar 40%.Berdasarkan SNI 03-0691-1996 tentang klarifikasi mutu paving block, komposisi paving dengan subtitusi plastic 1 : 4 dan 1 : 5 cocok untuk digunakan pada taman kota dan pedestrian untuk pejalan kaki. Then, what if the plastic waste can be used. This research has advantages such as being able to be an alternative to reduce the amount of PET plastic waste as a construction material, namely paving blocks that are environmentally friendly and can be used as paving roads, parks and parking lots. Paving block is a building material composition made of a mixture of portland cement or other hydraulic adhesives, water and aggregates with or without other additives that do not reduce the quality of the concrete (SNI 03-0691-1996). The composition of the paving blocks that will be made in this work consists of portland cement, sand, plastic waste and water as a mixture that will be planned in the design of making paving blocks. People don't know much that plastic can also be used as a construction material by becoming an additional material. Paving blocks with plastic cannot be doubted as strong as paving blocks in general. This is because previous research shows that paving blocks using fibers found in plastic can increase the compressive strength of paving. The test results show that the results of a 1:3 mixed paving block with a normal compressive strength of 18.07 MPa and a mixed paving block of 1:6 with a normal compressive strength of 11.32 MPa can then be estimated that the results of a narrative review according to our research are as follows, on the paving block composition. 1: 4, the planned target compressive strength is 15 MPa and the paving block composition 1:5 is the planned target compressive strength is 13 MPa with a data confidence level of R = 0.9798 from combining the previous data. With the use of plastic substitution for sand, it is targeted to there is an increase in compressive strength of 30% from paving blocks without the use of plastic in the composition of plastic substitution by 40%. city parks and pedestrians for pedestrians.

scholarly journals KAJIAN HUBUNGAN KUAT LENTUR DENGAN KUAT TEKAN BETON

2017 ◽  
Vol 2 (1) ◽  
pp. 38
Author(s):  
Suhendra Suhendra
Keyword(s):  
Compressive Strength ◽  
Bending Test ◽  
Test Results ◽  
Rigid Pavement ◽  
Flexure Strength ◽  
Almost All ◽  
The Relationship ◽  
General Specification ◽  
Made In

Currently, rigid pavement in almost all national, provincial and district roads is used instead of flexible pavement. One of the rigid concrete pavement quality controls is the flexural strength (fr = 45 kg / cm2 at 28 days) as stated in the General Specification of Binamarga year 2010 revision 3. This specification no longer regulates the value of compressive strength of the rigid pavement. This is a challenge for the construction’s practicians in implementation of the specification, because during this time the procurement of cement concrete is based on the compressive strength. The formula is in SNI 2847: 2013 on concrete that fr = 0,62Öfc’. While the construction practitioners generally still use the binamarga specifications of previous revisions that contain the quality of concrete (K-350), so that the quality of bending in general is not achieved. This research covers the value of bending test results conducted in the Engineering Laboratory on beams provided by third parties using lab services, as well as test specimens made in the laboratory. The test results show that there is a correlation between the flexure strength to the compressive strength of the concrete. The relationship is more or less the same as the formula contained in SNI concrete.Keywords: Concrete, Flexure strength, compressive strength, Binamarga Specs 2010 rev. 3

Berechnung der Feuchte im geneigten Dach - Ansatz des 'wahren' sd-Wertes von Unterspannbahnen / Determination of Moisture Content in Pitched Roofs - Application of the 'Real' sd-value of Understating Sheets

1998 ◽  
Vol 4 (1) ◽  
pp. 21-32
Author(s):  
H.-P. Leimer
Keyword(s):  
Test Methods ◽  
Laboratory Method ◽  
Diffusion Resistance ◽  
Test Results ◽  
Roof System ◽  
The Real ◽  
Water Vapour Diffusion ◽  
Experimental Laboratory ◽  
Made In

Abstract Lately, diffusion open underslating sheets (USS) have been inserted to pitched roofs increasingly. These sheets allow moisture to escape from the construction while they remain waterproof The conventional procedures to determine the water vapour diffusion resistance of the USS result in high deviations of the test results depending on the test methods and the boundary conditions. For this reason, an ordinary, non-ventilated roof-system with insulated rafters was tested in consideration of the different sd-values. The characteristic sd-values of underslating sheets based on experiments according to DIN 52165 were assumed to be constant and dependent on the humidity. The calculations prove that a serious danger to the roof-systems (almost by a factor of 10) is possible considering the chosen sd- value of an USS. Thereupon recommendations for an experimental laboratory method of the 'real' sd-value were made in order to be able to judge the roof-system in a realistic way.

The Determination of Foundation Force Modulus Coefficient in the Pile and Soil Interaction

2012 ◽  
Vol 446-449 ◽  
pp. 1596-1601
Author(s):  
Qing Juan Meng
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Model Test ◽  
Displacement Curve ◽  
Beam Model ◽  
Test Results ◽  
Pile Diameter ◽  
Calculation Results ◽  
The Relationship

In this paper, by using the nonlinear winkle foundation beam model the theory pile load displacement curve that corresponding to the model test were calculated, which were compared to the model test results, When this approach, the k used in winkle foundation beam model is the same in model test. According to this method the relationship between the soil force modulus coefficient k and the weakening compressive strength of pile diameter of 0.042 m and 0.02 m were determined, which combined with the value calculation results of other different pile diameter by 3 d finite element ,then the equation of k of different pile diameter and soil strength were determined.

scholarly journals RESISTANCE OF MORTAR WITH PPC CEMENT AND GEOPOLYMER MORTAR WITH WHITE SOIL SUBSTITUTION IN H2SO4 IMMERSION

ASTONJADRO ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 213
Author(s):  
Yulita Arni Priastiwi ◽  
Arif Hidayat ◽  
Rinaldo Tamrin ◽  
Difa Bagus Sendrika
Keyword(s):  
Compressive Strength ◽  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Fine Aggregate ◽  
Test Results ◽  
Binder Ratio ◽  
Density Values ◽  
Materials Used ◽  
Made In

<p class="IsiAbstrak">This study analyzes the effect of immersion of H<sub>2</sub>SO<sub>4</sub> (sulfuric acid) solution with a concentration of 10% on porosity, density and compressive strength of mortar with PPC cement and geopolymer with white soil substitution mortar. The purpose of this study was to determine the resistance of mortar with PPC cement and geopolymer with white soil substitution mortar when immersed in 10% H<sub>2</sub>SO<sub>4</sub> solution. The test object was 5x5x5 cm mortar with materials used including fly ash from PLTU Tanjung Jati B Jepara, white soil from Kupang, fine aggregate, water and alkaline activator in the form of a mixture of 8M NaOH and Na<sub>2</sub>SiO<sub>3</sub> and also PPC cement. The composition of the geopolymer mortar mixture is 1binder: 3Fine Aggregate: 0,5Water-Binder Ratio, while the mortar with PPC cement is made with a composition of 1PPC: 3Fine Aggregate: 0,5Water-Cement Ratio. The geopolymer mortar was made in 6 variations with a white soil substitution percentage of 0-25% with an increase of 5% for each variation. Compressive strength testing using a compression test apparatus. The test results show that the variation in the percentage of white soil substitution has less effect on the size of the porosity value. As for the value of compressive strength and density, white soil substitution has an effect, the higher the white soil substitution, the higher the compressive strength and mortar density values. Geopolymer mortar was better to withstand 10% sulfuric acid solution, while mortar with PPC cement had no resistance to 10% sulfuric acid solution because it continued to deteriorate over the course of the day. The greatest compressive strength is in variation IV (15% white soil substitution) of 15,31 MPa at 28 days of age, while the smallest porosity and greatest density are in variation VI (25% white soil substitution) of 0,17% and 2,205 grams/cm<sup>3</sup>.</p>

scholarly journals Determination of Unconfined Compressive Strength and Atterberg Limit of Soft Clay by Stabilizing with Sodium Silicate and Biomass Silica in Batu Pahat

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Amirul Najmi Shukri ◽  
◽  
Saiful Azhar Ahmad Tajudin ◽  
Ahmad Hakimi Mat Nor ◽  
◽  
...  
Keyword(s):  
Compressive Strength ◽  
Sodium Silicate ◽  
Clay Soil ◽  
Ground Improvement ◽  
Soft Clay ◽  
Clay Soils ◽  
Test Results ◽  
Determine Effect ◽  
Problematic Soil

Soft clay soils can be considered as problematic soil with the characteristic of high compressibility, low permeability and low shear strength. Construction on soft clay deposit may causes problem such as insufficient bearing capacity, settlement problem and instability on excavation and embankment. Ground improvement methods were used as the aimed of this study is to determine the effect of non-traditional stabilizer on the compressive strength of soft clay soils. Therefore, the objective of this study is to determine effect of compressive strength of untreated and treated soft clay soil with addition of non-traditional stabilizer at different curing periods. The soil properties of soft clay soil such as compaction, Atterberg limits, and unconfined compression strength (UCS) testing methods were used to observe the performance of treated and untreated samples. The test results from the UCS indicated that once Biomass Silica and Sodium Silicate in the form of SH-85 and TX-85 have been added to the clay soil, the strength of the sample will increase with increasing percent of sodium silicate and curing periods.

The quantitative comparison of experimental and simulated diffraction contrast images

1995 ◽  
Vol 53 ◽  
pp. 102-103
Author(s):  
Stuart McKernan
Keyword(s):  
Image Processing ◽  
Personal Computer ◽  
Close Agreement ◽  
Quantitative Comparison ◽  
Image Simulation ◽  
Computing Power ◽  
Diffraction Contrast ◽  
Simulated Images ◽  
Made In

For many years the concept of quantitative diffraction contrast experiments might have consisted of the determination of dislocation Burgers vectors using a g.b = 0 criterion from several different 2-beam images. Since the advent of the personal computer revolution, the available computing power for performing image-processing and image-simulation calculations is enormous and ubiquitous. Several programs now exist to perform simulations of diffraction contrast images using various approximations. The most common approximations are the use of only 2-beams or a single systematic row to calculate the image contrast, or calculating the image using a column approximation. The increasing amount of literature showing comparisons of experimental and simulated images shows that it is possible to obtain very close agreement between the two images; although the choice of parameters used, and the assumptions made, in performing the calculation must be properly dealt with. The simulation of the images of defects in materials has, in many cases, therefore become a tractable problem.

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%.

Sign in / Sign up

Export Citation Format

Share Document