scholarly journals Pemanfaatan Limbah Galvalum Sebagai Substitusi Aggregat Kasar Pada Jobmix Beton

2020 ◽  
Vol 3 (2) ◽  
pp. 332
Author(s):  
Muhammad Bahrudin ◽  
Agata Iwan Candra ◽  
Sigit Winarto
Keyword(s):  
Moisture Content ◽  
Experimental Method ◽  
Construction Materials ◽  
Degree Of Saturation ◽  
Absorption Test ◽  
Test Results ◽  
Percentage Absorption ◽  
Test Result ◽  
Pore Number

Concrete is one of the construction materials that is widely used. Currently, variations in concrete are being studied. Galvalum waste has high tensile properties but is mild. Its lightweight properties are expected to reduce the weight of the concrete itself. The purpose of this study is to find out the value of strong press, absorption, weight type (E), degree of saturation (Sr), moisture content (Wc), and porosity of the addition of galvalume waste. The method used is a experimental method. Variations in galvalum waste substitution used are 50% and 100% of the aggregate weight is roughT the sample used in the form of a cylinder size of 15cm x 30 cm with the initial quality of fc' 18.67 Mpa. The results of the strong press test showed that the galvalum waste subtitution has not been able to exceed the initial quality of the plan. The highest test result was obtained at a percentage of 50% with a strong press score of FC' 17.94 Mpa. In the percentage, absorption test results are 0.010%, the weight of the type is 2325 kg / m3, the pore number is 0.00232%, the water content is 0.108%, and porosity is 0.00108%.Beton merupakan salah satu bahan konstruksi yang banyak dipergunakan. Saat ini, pengguanaan variasi pada beton sedang banyak diteliti. Limbah galvalum memiliki sifat tarik yang tinggi namun ringan. Sifatnya yang ringan diharapkan mampu mengurangi berat beton itu sendiri. Tujuan dari penelitian ini adalah untuk mengetahui nilai kuat tekan, absorpsi, berat jenis (Ɣ), angka pori (e),derajat kejenuhan (Sr), kadar air (Wc), dan porositas dari penambahan limbah galvalum. Metode yang digunakan merupakan metode eksperimen. Variasi pensubtitusi limbah galvalum yang digunakan yaitu 50% dan 100% dari berat agregat kasar. sampel yang digunakan berbentuk silinder ukuran 15cm x 30 cm dengan mutu awal fc’ 18.67 Mpa. Hasil uji kuat tekan menunjukkan bahwa subtitusi limbah galvalum belum mampu melebihi mutu awal rencana. Hasil uji tertinggi didapat pada prosentase 50% dengan nilai kuat tekan fc’ 17,94 Mpa. Pada prosentase tersebut, didapat hasil uji absropsi yaitu 0,010%,  berat jenis yaitu 2325 kg/m3, angka pori yaitu 0,00232%, kadar air yaitu 0,108% serta porositas yaitu 0,00108%. 

scholarly journals Impact of the moisture content in medium sands on CPTU test results

2016 ◽  
Vol 48 (3) ◽  
pp. 221-231 ◽  
Author(s):  
Łukasz Zawadzki ◽  
Marek Bajda
Keyword(s):  
Moisture Content ◽  
Unsaturated Soils ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Degree Of Saturation ◽  
Test Results ◽  
Time Dynamic ◽  
Tip Resistance ◽  
The Impact ◽  
Resistance Value

Abstract Soils occurring in the soil “active zone” are in contact with the surface and are directly influenced by external factors (mainly climatic changes) that cause variation in their parameters over time. Dynamic and uncontrolled changes of soil properties e.g. due to rainfall and evapotranspiration processes may affect field test results leading to the misinterpretation of the obtained data. This paper presents investigations on the influence of moisture content changes in sandy soils on CPTU results. For this purpose, a field ground model has been constructed and five CPTU tests with a different moisture content of soil were carried out. During the investigations, the tip resistance (qc), friction on sleeve (fs), and pore water pressure (u2) were measured. Moreover, a TDR probe was applied to determine the distribution of the moisture content in the studied soil columns. Differences between CPT results obtained in saturated and unsaturated soils have been shown. Furthermore, a simple equation to correct the tip resistance value due to the impact of the degree of saturation has been proposed.

Individual unit and guard-zone airtightness tests of apartment buildings

2018 ◽  
Vol 43 (4) ◽  
pp. 301-337
Author(s):  
Andreas Kaschuba-Holtgrave ◽  
Angela Rohr ◽  
Stefanie Rolfsmeier ◽  
Oliver Solcher
Keyword(s):  
Reference Model ◽  
Construction Materials ◽  
Test Results ◽  
Air Leakage ◽  
Apartment Buildings ◽  
Individual Unit ◽  
Materials Used ◽  
Industrial Standards ◽  
Guard Zone

The airtightness of eight apartment buildings containing six to 11 units each on three or four floors was tested with and without guard-zone pressure, that is, with and without consideration of internal leakages. The layouts of these buildings varied: two of them had no central stairwell; in two other buildings, only some of the apartments were connected to the central stairwell; and the third type had all apartments connected to a central stairwell. Airtightness tests were performed with and without guard-zone pressure conditions. During these tests, two to eight BlowerDoor systems were used simultaneously to create guard-zone pressure conditions. In this report, the authors evaluate the test results of three buildings of different layout types. Furthermore, a reference model for the natural air permeability of all construction materials used in the interior and exterior envelopes of each apartment was created for two buildings in accordance with the German Industrial Standards (DIN). We present the results of this assessment and put them in context with the airtightness tests with and without guard-zone pressure. The results indicate that the air leakage contribution of internal partitions is significant, namely 32% and 27%. As this affects sound transmission, fire protection, odor transfer, and the quality of ventilation, it is essential to assess the airtightness of not only the exterior but also the interior envelope of each apartment.

scholarly journals Quality Analysis of Briquettes based on Waterding with Variation of Pressure and Pellet Geometry to Water Content and Value of Calories

2020 ◽  
Vol 8 (2) ◽  
pp. 55
Author(s):  
Lintang Pratama ◽  
Dwi Pangga ◽  
Dwi Sabda Budi Prasetya
Keyword(s):  
Moisture Content ◽  
Water Hyacinth ◽  
Calorific Value ◽  
Quality Analysis ◽  
Test Results ◽  
Heating Value ◽  
Tapioca Starch ◽  
Quality Of Water ◽  
Value Range

This study is a research on water hyacinth-based briquettes which shows the calorific value of each form of briquettes. The purpose of this study was to analyze the quality of water hyacinth briquettes with variations in pressure and pellet geometry. The quality analyzed includes moisture content and calorific value. The method of making briquettes starts from charcoal, pounding, then mixing with tapioca starch adhesive. The composition of the mixture used is 90% water hyacinth charcoal with 10% tapioca starch adhesive. 4 geometric variations are used, namely, solid box, hollow box, solid tube and hollow tube with 3 pressure variations, namely, 10 PSI, 20 PSI and 30 PSI. Test results and analysis,briquettes at a pressure of 20 PSI produces a calorific value range of 91.15 - 150.14 cal / gram. The resulting calorific value is higher than the briquettes at a pressure of 10 PSI and 30 PSI with a heating value range of 93.84 - 148.79 cal / gram and 89.81 - 135.39 cal / gram. Hollow briquettes produce a calorific value range of 107.24 - 150.14 cal / gram higher than solid geometric briquettes which produce a heating value range of 89.81 - 148.79 cal / gram. So that the contribution of the results of this research is that the community makes briquettes with shape and pressure with good results shown in this study.

scholarly journals Synerisis and Cycling Test the Sendok Leaf Extract Gel (Plantago Mayor L.) with Optimization of Variations of Gelling Agent Carbomer 940 Concentration

2021 ◽  
Vol 6 (12) ◽  
pp. 908-910
Author(s):  
A L Yusuf ◽  
D Nugraha
Keyword(s):  
Experimental Method ◽  
Extraction Method ◽  
Leaf Extract ◽  
Storage Temperature ◽  
Gelling Agent ◽  
Plantago Major ◽  
Test Results ◽  
Cycling Test ◽  
Carbomer 940

The purpose of this study was to determine the effect of the concentration of the gelling agent Carbomer 940 on the gel of daun Leaf Extract (Plantago major L.). The method used is the experimental method. The extraction method used is maceration with 96% alcohol. The design in this study is the manufacture of a gel formulation of sendok Leaf extract (Plantago major L.) with the concentration of the gelling agent Carbomer 940 and the syneresis test. Syneresis test results show that all formulas do not occur syneresis. The results of the cycling test showed that the sendok Leaf (Plantago major L.) extract gel was not affected by storage temperature. The conclusion of this study shows the effect of variations in the concentration of the gelling agent Carbomer 940 on the quality of gel.

scholarly journals "Base Genep" Instant Spices Quality For Sale In East Denpasar

2020 ◽  
Vol 4 (2) ◽  
pp. 142-150
Author(s):  
Sofia nggoweng ◽  
Ni Made Ayu Suardani singapurwa ◽  
I Nyoman Rudianta
Keyword(s):  
Escherichia Coli ◽  
Moisture Content ◽  
Water Content ◽  
Ph Value ◽  
Descriptive Study ◽  
Experimental Methods ◽  
Plate Count ◽  
Test Results ◽  
Total Plate Count

Instant spices is a mixture of several spices that are young to be found in the market at an affordable price, and are usually used immediately as a cooking spice for certain foods. This study aims to determine the quality of the "Base Genep" instant spices sold in the East Denpasar Market. This research is a descriptive study using survey and experimental methods in the laboratory. The number of samples to be studied was 44 samples from 81 populations. The variables in the study were moisture content, pH, Escherichia coli, Total Plate Count (TPC) and mold. The results showed that from 44 samples of "Basa Genep" instant seasoning water content test results obtained were 21.62% - 23.707%, while the pH value of 44 samples of "Basa Genep" instant spice was obtained between 2.2-2.5 so that it meets the requirements.

scholarly journals Pemanfaatan Kunyit (Curcuma domestica Val) Untuk Memurnikan Minyak Jelantah

2018 ◽  
Vol 7 (1) ◽  
pp. 41
Author(s):  
Muhammad Silmi Hi Abubakar ◽  
Siti Nuryanti ◽  
Suherman Suherman
Keyword(s):  
Fatty Acids ◽  
Moisture Content ◽  
Free Fatty Acids ◽  
Quality Parameters ◽  
Test Results ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Before And After

Study on the purification and quality test of used cooking oil with turmeric has been done. This study aims to determine the quality of cooking oil after purified turmeric. The quality parameters of oil studied were the moisture content, free fatty acids (FFA), and peroxide. The methods used for determination of these parameters were gravimetry for moisture content, acid-base titration for free fatty acids, and iodometric for peroxide. The test results for water from 0.6% to 0.4% free fatty acid from 1.2% to 0.2%, and peroxide levels before and after purification were successively from and 6 meq/g to 4 meq/g, respectively. Only free fatty acids of all three parameters met the requirement of SNI.

scholarly journals KARAKTERISTIK PAPAN PARTIKEL KULIT BUAH KAKAO (Theobroma cacao L.) PADA VARIASI KONSENTRASI PEREKAT POLYVINYL ACETATE

2018 ◽  
Vol 6 (1) ◽  
pp. 82
Author(s):  
I Gusti Made Teddy Pradana ◽  
Bambang Admadi Harsojuwono ◽  
Amna Hartiati
Keyword(s):  
Moisture Content ◽  
Water Absorption ◽  
Polyvinyl Acetate ◽  
Mechanical Test ◽  
Test Results ◽  
Particle Board ◽  
Thickness Swelling ◽  
Cocoa Pod Husk ◽  
Theobroma Cacao L ◽  
Test Result

The aims of this study were to know the characteristic of particle board cocoa-pod husk on variation of polyvinyl acetate (PVAc) adhesive concentration, and to have the best concentration polyvinyl acetate adhesive in particle board from cocoa-pod husk. The experiments in this study used a single factor with regression analysis. The factors are the concentration of polyvinyl acetate adhesive, that is 35%, 37.5%, 40%, 42.5%, 45% dan 47.5%. The fisis test results showed that concentration of polyvinyl acetate adhesive had upward trend on density and downward trend on moisture content, water absorption, and thickness swelling. The mechanical test result showed that concentration of polyvinyl acetate adhesive on concentration 47.5% had the best treatment. The best treatmest of particle board from cocoa-pod husk is made by used 47.5% polyvinyl acetate adhesive with density 0.48 g/cm3, moisture content 8,64%, water absorption 155.85%, thickness swelling 13.34% in fisis test and with MOE 44.07 kg/cm2, MOR 1.38 kg/cm2 and compressive strength parallel 2.36 kg/cm2 in mechanical test. Key words: particle board, cocoa-pod husk, polyvinyl acetate

scholarly journals ANALISA MIKROBIOLOGI DAN ORGANOLEPTIK PRODUK TENGGIRI BEKU(Scomberomorus commersonii)

2018 ◽  
Vol 6 (2) ◽  
pp. 54
Author(s):  
Mulyana Mulyana ◽  
Dwi Indah Widya Yanti
Keyword(s):  
Plate Count ◽  
Test Results ◽  
Microbiological Test ◽  
E Coli ◽  
Total Plate Count ◽  
Physical Chemical ◽  
The People ◽  
Standard Value ◽  
Test Result

Mackerel fish is sea fishs species which are pelagic marine fish groupwhich has a distinctive taste so favored by the people. frozen mackerel is a fishs that is easily damaged. Thus the fishs need to be handling it well. Fishskeep the temperature will affect the quality of the fishs. during storage in the storage and distribution processing. can affect product quality. To decrease the quality of frozen mackerel fishs products need to note the changes that occur either through physical, chemical and biological. It explains research to analyze the quality of fishs products frozen mackerel observe  aspects of Microbiology testing and Appearance. Based on the results of microbiological and organoleptic frozen mackerel fish, it can be conclude that test for microbiological test total plate count (TPC) is below the standard value in accordance with ISO 4110, 2014. for Uju E, coli is negative, Salmonella Test is Begatif, Vibrio Colera test is also negative and Appearance Test Values above 7 quality fish so the test results of Microbiology and poduct organoleptic frozen mackerel safe for consumption as the above test result.

scholarly journals Exudate coloring test suitability for assessing the viability of coffee seeds ( Coffea arabica L.)

2016 ◽  
Vol 38 (3) ◽  
pp. 212-218 ◽  
Author(s):  
Paulo César Hilst ◽  
Denise Cunha Fernandes dos Santos Dias ◽  
Guilherme Fontes Valory Gama ◽  
Joyce de Oliveira Araújo
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Coffea Arabica ◽  
Test Results ◽  
Germination Test ◽  
Paper Towel ◽  
Coffea Arabica L ◽  
Water Contents

Abstract: The exudate coloring test has been promising in order to quickly evaluate the quality of coffee seeds. The objective of the research was to adjust the coloring exudate test for coffee seeds and to evaluate the influence of the water content of seeds and of the imbibition period on the test results. Seeds from five lots of 'Catuaí 44' were used, with the following water contents: 30%, 20% and 12%. For the exudate coloring test, the parchment and silver skin (spermoderm) from the seeds were removed. Then, the seeds were distributed on a paper towel, moistened with water, and kept in a germinator at 25 °C for 24, 48, 72, 96 and 120 h. Four classes of coloring intensity were established: absence of color (A), light (L), medium (M) and strong (S) intensities, assigning the values 0, 3, 5 and 10 for each class, respectively. The Viability Index (VI) was calculated by the equation VI=100-(0xA)-(3xL)-(5xM)-(10xS). The exudate coloring test may be recommended to estimate the viability of coffee seeds, providing results correlated to the germination test. The best results were obtained for the seeds with 12% moisture content imbibed for 72, 96 and 120 h and seeds with 30% moisture content after 72 and 120 h of imbibition.

scholarly journals PENGUJIAN KUALITAS KAYU LAPIS UNTUK KONTRUKSI BANGUNAN YANG BEREDAR DI PASARAN KOTA BENGKALIS

2016 ◽  
Vol 11 (2) ◽  
pp. 76-87
Author(s):  
Sonia Somadona ◽  
Evi Sribudiani ◽  
Tuti Arlita
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Surface Quality ◽  
Thickness Swell ◽  
Test Results ◽  
Class A ◽  
Composite Product

Plywood is a composite product in form of an artificial board made of veneer sheets that were bonded together with an arrangement of perpendicular intersection. The quality of plywood circulating in Bengkalis City market was examined onits quality of the surface, inside and back space, moisture content and the thickness of its swell . The examination on the quality of plywood for construction of buildings circulating in Bengkalis City Market was using the standard of SNI 01-5008.2-1999. The test results of 4 plywood trademarks circulating in the market of Bengkalis City on its surface quality was showing that the product as known as Arwana and Tunas trademarks were belong to C class, Fortune that has quality B class, and OFR was on A class quality. While the quality inside of plywood of brand mark as Arwana, Tunas and Fortune were including to class A quality (overlap defect), but those 2 natural and technical defects is not including to SNI requirement criterias (slit and length), OFR trademark plywood’s inside quality was included into A classon its natural and technical defect criteria. Further, the quality of plywood’s back space of those 4 trademarks circulating in Bengkalis City were included into the standard SNI 01-5008.2-1999. The examintaion of moisture content in accordance to SNI 01-5008.2-1999 standard showed that Fortune and OFR trademark were fulfilling the requirement standard of 14%, while Arwana and Tunas were having higher water content (≥ 20%). At last, the thickness swell of all trademarks were in conformity with the SNI 01-5008.2-1999, in which reqiuring its thickness of 12%.

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