scholarly journals Cimento com prazo de validade vencido: efeito no slump test e na resistência do concreto / Cement with expired date: effect in the slump and in the compressive strength of the concrete

2021 ◽  
Vol 7 (12) ◽  
pp. 117568-117582
Author(s):  
Stéphanie Oliveira Nina Rocha ◽  
Cássio Alvarenga Gonçalves ◽  
Lino Manuel Serra Maia
Keyword(s):  
Compressive Strength ◽  
Slump Test

scholarly journals Effect of basalt aggregates and plasticizer on the compressive strength of concrete

2015 ◽  
Vol 4 (4) ◽  
pp. 520 ◽  
Author(s):  
Mohammad Al-Rawashdeh ◽  
Ashraf Shaqadan
Keyword(s):  
Compressive Strength ◽  
Laboratory Investigation ◽  
Concrete Strength ◽  
Experimental Program ◽  
Sieve Analysis ◽  
Curing Time ◽  
Compressive Test ◽  
Slump Test ◽  
Compressive Strength Of Concrete

The purpose of this research is to investigate the feasibility of using basalt aggregates and plasticizers in concrete mixes. An elaborate experimental program that included a variation of plasticizer and basalt in concrete mixes. The laboratory investigation included measurements of sieve analysis, compressive strength, and slump test. The compressive test was evaluated at 7, 14, 28 days of curing time. The results show significant improvement in concrete strength up to 2% of additive plasticizer after that concrete strength was reduced.

scholarly journals PENGARUH PENAMBAHAN LIMBAH SERBUK CANGKANG KERANG DAN SERBUK KACA SEBAGAI BAHAN PENGGANTI SEMEN TERHADAP KUAT TEKAN BETON NORMAL

2020 ◽  
Vol 14 (1) ◽  
pp. 22
Author(s):  
Nurjanah Nurjanah ◽  
M. Dani Juli Rohman ◽  
Riski Krisdiantoro
Keyword(s):  
Compressive Strength ◽  
Experimental Method ◽  
Glass Powder ◽  
High Yield ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Slump Test ◽  
Waste Concrete ◽  
Compressive Strength Of Concrete ◽  
Shell Powder

Abstrac This research was conducted to determine the effect of the addition of waste shells and shell powder glass powder on the compressive strength of concrete. The method used is to use the experimental method by making test specimens with a mixture of waste shells powder shells and glass powder by 4%; 8%; 12% then compared with normal concrete without added ingredients. Concrete specimens that have been soaked then tested their compressive strength with the age of 7 days, 14 days, 21 days, and 28 days. The results of the test showed that normal concrete which was not added with the waste of shell powder and glass powder had compressive strength under mixed concrete variations of 4%, 8%, and 12 % when the concrete was 28 days old. Concrete which is added with waste of shell powder and glass powder has  a high yield at 4% variation that is equal to 20,66 MPa. For concrete Variasi of 8% has a compressive streng value of 20,17 MPa, For variations of 12% has a compressive strength value of 20,46 MPa and for normal concrete has a compressive strength of 20,16 MPa at the age 28 days. The compressive strength value generated by the research that occurs due to the slump test value factor that is done is not the same.                       Keywords: Concrete, scallop waste powder, Glass powder waste, concrete compressive strength.

scholarly journals ANÁLISE DAS PROPRIEDADES DE BLOCOS DE CONCRETO PARA PAVIMENTO INTERTRAVADO PRODUZIDO COM CINZA DO BAGAÇO DA CANA-DE-AÇÚCAR

2018 ◽  
Vol 10 (4) ◽  
pp. 28-35
Author(s):  
Yann Carvalho Bonilha ◽  
Guilherme Souza Rodrigues ◽  
Isabela A. Mendes Martins ◽  
Beatriz de Mello Massimino ◽  
Daniele Araujo Altran ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Standardized Tests ◽  
Sugarcane Bagasse ◽  
Partial Substitution ◽  
Specific Mass ◽  
Natural Sand ◽  
Slump Test

The objective of this work was to study the partial substitution of the natural (sand) aggregate by ash from sugarcane bagasse (CBC), by mass, in the proportions of 10% and 20% for the preparation of pieces of concrete for interlocking pavement. Firstly, the pilot trait was developed, this one still withoutthe addition of CBC, which served as parameter for comparisons. The properties of the aggregates and the concrete were analyzed through standardized tests of granulometry, specific mass, slump test, compressive strength and water absorption. As for the values of compressive strength, the 10% substitution trait presented the best result of compressive strength, being 15% superior to the pilot trace. As for absorption, an increase in permeability was observed as the addition of CBC increased. Finally, it wasconcluded that the satisfactory trait in relation to the properties analyzed was the 10% substitution trait.

scholarly journals Tinjauan Ulang Mengenai Kadar Maksimum Pipih dan Memanjang Agregat Kasar dalam Campuran Beton Cara SNI. (Hal. 107-115)

2019 ◽  
Vol 5 (2) ◽  
pp. 107
Author(s):  
Decka Chaniago Sukanli ◽  
Priyanto Saelan
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Cylindrical Specimen ◽  
Maximum Level ◽  
Strength Test ◽  
Concrete Mixture ◽  
Concrete Compressive Strength ◽  
Slump Test ◽  
Coarse Aggregates ◽  
Compressive Strength Test

ABSTRAKDalam campuran beton, agregat kasar memiliki 70% sampai 80% pengaruh terhadap kuat tekan beton. Agregat kasar memiliki bentuk yang berbeda seperti membulat, pipih, dan memanjang tergantung pada sumbernya. Dalam penelitian ini, dilakukan penyelidikan pada kadar maksimum bentuk pipih dan memanjang agregat kasar dalam campuran beton. Pada penelitian kadar bentuk pipih dan memanjang agregat kasar ini menggunakan benda uji silinder dengan ukuran diameter 10 cm dan tinggi 20 cm. Pengujian dilakukan dengan uji slump dan uji kuat tekan beton yang mengacu pada SNI. Slump rencana yang digunakan yaitu (30-60) mm dan (60-180) mm dengan kuat tekan beton rencana yaitu 30 MPa usia 28 hari. Hasil pengujian ini dapat diketahui bahwa kadar pipih dan memanjang agregat kasar melebihi 20% tidak berpengaruh terhadap kuat tekan beton selama kadar pipih dan memanjang agregat kasar tidak melebihi 45% dari total agregat batu pecah.Kata kunci: bentuk pipih dan memanjang, agregat kasar, kuat tekan beton, uji slump ABSTRACTIn concrete mixture, coarse aggregate has 70% to 80% influence on concrete compressive strength. The coarse aggregate have different shape like rounded, angular, flaky and elongated depending on the source. In this study, we investigated the maximum level of flat and elongated coarse aggregate in concrete mixture. In the study of the level of flat and elongated forms coarse aggregates using cylindrical specimen with a diameter of 10 cm and a height of 20 cm. Testing was conducted with slump and concrete compressive strength test which refers to SNI. The slump plan used is (30-60) mm and (60-180) mm with a 30 MPa concrete compressive strength of 28 days. The results of this test can be seen that the flat and elongated of coarse aggregates exceeding 20% does not effect compressive strength of the concrete as long as the flat and elongated of coarse aggregates not exceed at 45% of the total aggregates.Keywords: flat and elongated shape, coarse aggregates, compressive strength, slump test

Effect of Curing Methods on the Compressive Strength of Palm Kernel Shell Aggregate Concrete

2020 ◽  
Vol 5 (1) ◽  
pp. 11-17
Author(s):  
E. A Oluwasola ◽  
A Afolayan ◽  
I. O. Ameen ◽  
E. O. Adeoye
Keyword(s):  
Compressive Strength ◽  
Building Materials ◽  
Salt Water ◽  
Research Work ◽  
Palm Kernel ◽  
Aggregate Concrete ◽  
Slump Test ◽  
Palm Kernel Shell ◽  
Mixing Ratios ◽  
Curing Methods

High cost of building construction in the country has remained a major source of concern to successive government in the nation. Building materials constitute approximately 60-70% of the building cost. In view of this, the need for alternate building materials is imminent. This research work focuses on assessment of effect of different curing methods on the compressive strength of palm kernel shell aggregate concrete. All materials were collected at Ede, Osun state. The stages involved in this research are material collection, batching and mixing, casting of concrete cubes, slump test, curing, and compressive strength test. The tests carried out were x-ray fluorescence, slump test and compressive strength. Four different curing methods were used; water, air, salt water, and detergent to cure concrete with two mixing ratios of 1:2:4 and 1:1½:3. It can be observed that the Palm Kernel Shell (PKS) contains mainly Iron (Fe), Potassium (K), Calcium (Ca), Manganese (Mn) elements and other impurities. From the slump test results, it can be deduced that 1:1½:3 gave a better slump as expected. The compressive strength of cube ranges from 2.244 to 3.852N/mm2 Based on the results, the curing methods has a significant effect on the compressive strength of the PKS aggregate concrete.

scholarly journals Investigation of the Effect of using Salak Seeds as Coarse Aggregate in Concrete

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Andi Sulfanita ◽  
Gufran Darma Dirawan ◽  
Muhammad Ichsan Ali
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Quantitative Study ◽  
Design Of Experiment ◽  
Coarse Aggregate ◽  
Concrete Mixture ◽  
Green Concrete ◽  
Slump Test ◽  
Compressive Strength Of Concrete

This study described the effect of using salak seed waste as a substitute for coarse aggregate. The percentage of salak seed in concrete mixture became experimental variable to discover the best compressive strength of concrete. Quantitative study with experimental study was carried out at the Laboratory of Materials and Concrete, Faculty of Engineering, University. The design of experiment used a designed compressive strength of concrete of 20 Mpa. The experiment consisted of five variations in the percentage of salak seeds, namely 0%, 5%, 10%, 15%, and 20%. The slump test is carried out immediately after mixing the concrete in each proportion. Furthermore, 20 pieces of cylindrical concrete samples in each treatment were tested for 7,14,21 and 28 days. This method aims to compare the strength of each of the resulting concrete compositions. The results obtained showed that the use of salak seeds with a percentage of 5% and 10% gave a compressive strength value of 28 days which met the standard compressive strength of the design female. Meanwhile, the percentage of salak seeds 15% and 20% did not produce the planned compressive strength value. Therefore, salak seeds are suitable to be used as a substitute for coarse aggregate with a percentage of less than 10%. The higher the substitution of the mixture in the salak seed concrete, the lower the compressive strength of the concrete. The results of this study can be developed in green concrete studies that use waste.

scholarly journals Modifikasi Beton Fc 9,8 Mpa Menggunakan Abu Ampas Kopi

2020 ◽  
Vol 3 (2) ◽  
pp. 234
Author(s):  
Shirfi Wimaya ◽  
Ahmad Ridwan ◽  
Sigit Winarto
Keyword(s):  
Compressive Strength ◽  
Construction Material ◽  
Absorption Capacity ◽  
Strength Test ◽  
Building Structures ◽  
Test Results ◽  
Slump Test ◽  
Average Value ◽  
Coffee Grounds ◽  
Compressive Strength Test

Concrete is a construction material that is widely used in building structures. Cement is the main constituent of concrete whose needs are increasing. The expansion of coffee shops in Kediri City resulted in an increase in the volume of coffee grounds waste, which can be used as an alternative to cement. The purpose of this study was to determine the value of the slump test, compressive strength test, and test the absorption capacity of the addition of coffee grounds ash to the concrete sample specimen using a cylinder is measuring 15cm x 30cm with 5 pieces of concrete quality K-125 or equivalent to fc '9.8 Mpa. Slump test results with a percentage of 4%, 8%, 12%, namely 2.5 cm, 0.5 cm and 2.5 cm. The results of the concrete compressive strength test with a percentage of 4% obtained the results of the compressive strength fc '10.51 Mpa or equivalent to K125, a percentage of 8% produces a compressive strength of fc' 8.39 and a percentage of 12% produces a compressive strength fc '7.56 Mpa equivalent to K100. The water absorption test results for 28 days resulted in an average value of 0.32 kg, 0.25 kg, 0.15 kg, and 33 kg.Beton merupakan salah satu bahan konstruksi yang banyak digunakan pada struktur bangunan. Semen merupakan penyusun utama beton yang kebutuhannya semakin meningkat. Perluasan kedai kopi di Kota Kediri mengakibatkan peningkatan volume limbah ampas kopi yang dapat digunakan sebagai alternatif pengganti semen. Tujuan penelitian ini adalah untuk mengetahui nilai uji slump, uji kuat tekan, dan uji daya serap penambahan abu ampas kopi pada benda uji beton dengan menggunakan silinder berukuran 15cm x 30cm dengan kualitas beton sebanyak 5 buah. K-125 atau setara dengan fc '9.8 Mpa. Hasil uji slump dengan persentase 4%, 8%, 12% yaitu 2.5 cm, 0.5 cm dan 2.5 cm. Hasil uji kuat tekan beton dengan persentase 4% didapatkan hasil kuat tekan fc '10 .51 Mpa atau setara dengan K125 persentase 8% menghasilkan kuat tekan fc '8,39 dan persentase 12% menghasilkan kekuatan tekan fc '7,56 Mpa setara dengan K100. Hasil pengujian daya serap air selama 28 hari menghasilkan nilai rata-rata 0,32 kg, 0,25 kg, 0,15 kg, dan 33 kg.

scholarly journals The Effect of the Mixture of Plastic Waste as a Lightweight Concrete Material

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Nurmaidah Nurmaidah ◽  
Yudhis Tira Pradana
Keyword(s):  
Compressive Strength ◽  
Lightweight Concrete ◽  
Negative Impact ◽  
Minimum Weight ◽  
Concrete Specimen ◽  
Fine Aggregate ◽  
Slump Test ◽  
Average Maximum ◽  
Significant Difference ◽  
The Difference

Concrete has many functions, and is also an important role in maintaining building stability and strength. By using plastic fiber as a lightweight concrete mixture material, it is expected to increase the compressive strength of the lightweight concrete, and also to reduce the negative impact of waste plastic bottles. In this study also added differences in FAS for each specimen 0.5 and 0.6. With the difference in variation in each lightweight concrete specimen, it is expected to be able to know the performance of concrete from the different variations of PET and FAS. The use of PET and FAS mixtures in lightweight concrete produces the lightest Concrete at 9% PET mixture of fine aggregate weight. In full there are two results, FAS 0.5 = 11045 gr, and FAS 0.6 = 10981  gr. But for the maximum weight of test specimens it cannot be said to be structural lightweight concrete because it does not meet the minimum weight requirement of 1850 Kg / m3. The Slump test on the specimen shows that the highest Slump test is in FAS 0.6 with 9% PET mixture, with slump height reaching 135 mm or 13 cm, and 125 mm or 12.5 cm in FAS 0.5 9% PET mixture. Cylinder absorbance showed that the average maximum absorption of FAS specimens was 0.5 = 1,268% and FAS 0.6 = 1,212%. The value of the lightest concrete compressive strength is the most optimum in the variation of 3% PET specimens in FAS 0.5 and variation of 6% PET specimens in FAS 0.6. that is 25 Mpa and 19 Mpa. And for the SPSS test states that there is a significant difference in the differences in the variation of PET and FAS test objects.

The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

2020 ◽  
Vol 108 (2) ◽  
pp. 203
Author(s):  
Samia Djadouf ◽  
Nasser Chelouah ◽  
Abdelkader Tahakourt
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Mechanical Behavior ◽  
Agricultural Waste ◽  
Hydraulic Press ◽  
Dry Density ◽  
Olive Stone ◽  
Compressed Earth Blocks ◽  
Clay Matrix ◽  
Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

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%.

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