scholarly journals Pemanfaatan Limbah Karbit Sebagai Bahan Tambah Pada Mortar Ditinjau Dari Kuat Tekan

Jurnal PenSil ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 146-151
Author(s):  
Wisnu Adhi Saputra ◽  
Anisah Anisah ◽  
Rosmawita Saleh
Keyword(s):  
Compressive Strength ◽  
Waste Utilization ◽  
Infrastructure Development ◽  
Cement Production ◽  
Water Factor ◽  
Strength Based ◽  
Alternative Material ◽  
Maximum Compressive Strength ◽  
Average Compressive Strength

Infrastructure development that occurs causes cement demand to increase each year To reduce cement production, other alternative substitutes are needed, one alternative material that can be utilized is carbide waste. Utilization of carbide waste if added as material needs to be handled first before use. The addition of carbide waste as an ingredient in mixing mortar is expected to give a pozolanic reaction so that it will increase the compressive strength of the mortar. The aim of this research is to prove whether carbide waste as an added material can reach the M type mortar compressive strength based on SNI 6882-2014. This study used an experimental method with a total of 36 cube specimens measuring 50 mm each side, a cement water factor of 0.4, the compressive strength of an M-type plan (17.2 MPa). The specimens consisted of mortars with added carbide waste materials with variations of 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% ​​by weight of cement. The results showed that all variations with the addition of carbide waste can increase the compressive strength to exceed the quality of type M quality (17.2 MPa). Average compressive strength of mortar with the addition of carbide waste variations of 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% ​​of the weight of cement at 28 days respectively as follows are 20, 67 MPa, 23.33 MPa, 22 MPa, 26.67 MPa, 24.33 MPa, 19 MPa. Maximum compressive strength occurs at a variation of 7.5% carbide waste

Quality Improvement of Recycled Aggregate Concrete

2006 ◽  
Vol 302-303 ◽  
pp. 308-313 ◽  
Author(s):  
Vivian W.Y. Tam ◽  
X.F. Gao ◽  
C.M. Tam
Keyword(s):  
Compressive Strength ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Two Stage ◽  
New Approach ◽  
Aggregate Concrete ◽  
Strength Based ◽  
Mixing Method ◽  
Strength Variability

The developments of recycled aggregate concrete pressing hard in construction activities; however, the limitations on their applications had never being ended. The focus of this paper is: i) investigating the waste management strategy in construction; ii) proposing the two-stage mixing approach (TSMA) to improve the quality of RAC; and iii) experimenting the TSMA and assessing the benefits possibly gained. It proposes a new approach in mixing concrete, namely, the two-stage mixing method, to improve compressive strength of RAC and lower its strength variability. The replacement ratio from zero to thirty is under experiment on their compressive strength. Based upon the experimental results, improvements of 31 % in strength at 28 days with 30 % RA substitute was achieved. The effect can be attributably to the porous nature of the RA and the pre-mix process which can make some pores filled up resulting in a denser concrete and thus leading to higher strength when compared with the traditional mixing approach. Therefore, two-stage mixing approach can open up a wider application of recycled aggregate concrete.

scholarly journals THE EFFECT OF ADDING CEMENT WASTE ON THE QUALITY OF CONCRETE COMPRESSIVE

Jurnal CIVILA ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 213
Author(s):  
Asrul Majid ◽  
Hammam Rofiqi Agustapraja
Keyword(s):  
Compressive Strength ◽  
Strength Test ◽  
Fine Aggregate ◽  
Infrastructure Development ◽  
Test Results ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete ◽  
Concrete Materials ◽  
Test Objects

Infrastructure development is one of the important aspects of the progress of a country where most of the constituents of infrastructure are concrete. The most important constituent of concrete is cement because its function is to bind other concrete materials so that it can form a hard mass. The large number of developments using cement as a building material will leave quite a lot of cement bags.In this study, the authors conducted research on the effect of adding cement waste to the compressive strength of concrete. This study used an experimental method with a total of 24 test objects. The test object is in the form of a concrete cylinder with a diameter of 15 cm and a height of 30 cm and uses variations in the composition of the addition of cement waste cement as a substitute for fine aggregate, namely 0%, 2%, 4% and 6%. K200). The compressive strength test was carried out at the age of 7 days and 28 days.The test results show that the use of waste as a partial substitute for fine aggregate results in a decrease in the compressive strength of each mixture. at the age of 7 days the variation of 2% is 16.84 MPa, 4% is 11.32 MPa and for a mixture of 6% is 6.68 MPa. Meanwhile, the compressive strength test value of 28 days old concrete in each mixture decreased by ± 6 MPa. So the conclusion is cement cement waste cannot be used as a substitute for fine aggregate in fc 16.6 (K200) quality concrete because the value is lower than the specified minimum of 16.6 MPa.

scholarly journals PEMANFAATAN LIMBAH GYPSUM BOARD DAN BATU BATA MERAH UNTUK SUBSTITUSI SEMEN PADA PEMBUATAN BETON

2019 ◽  
Vol 2 (2) ◽  
pp. 333
Author(s):  
Didik Hadi Prayogo ◽  
Ahmad Ridwan ◽  
Sigit Winarto
Keyword(s):  
Compressive Strength ◽  
Building Blocks ◽  
New Materials ◽  
Concrete Compressive Strength ◽  
Gypsum Board ◽  
Normal Concrete ◽  
Compressive Strength Test ◽  
Average Compressive Strength ◽  
Main Material

Concrete is one of the most vital building blocks, from columns, bricks, paving to roads made of concrete, so the use of concrete tends to be high. Concrete is often used as the main buffer in a building, so good quality is needed, but this is not accompanied by a declining quality of the material, so it requires innovation in the addition of new materials that can at least reduce the needs of the main material for making concrete, one of which is the utilization of Gypsum Board waste and red brick waste. The results of testing the concrete compressive strength test with the addition of Gypsum Board waste and red brick waste to cement obtained pretty good results. Concrete, which has the highest average compressive strength than normal concrete, has concrete with a mixture of red brick and gypsum waste of 10% each with a compressive strength of 250.56 kg / cm², and which has the lowest compressive strength have concrete with a mixture of red bricks and gypsum waste 15% each with a compressive strength of 195.56 kg / cm².Beton merupakan salah satu unsur penyusun bangunan paling vital mulai dari kolom,bata, paving hingga jalan terbuat dari beton sehingga penggunaan beton cenderung tinggi. Beton sering digunakan sebagai bahan penyangga utama pada suatu bangunan maka diperlukan kualitas yang baik, namun hal tersebut tidak di sertai dengan kualitas bahan yang kian menurun,makadiperlukan inovasi penambahan bahan baru yang setidaknya dapat mengurangi kebutuhan bahan utama pembuat beton, salah satunya pemanfaatan limbah Gypsum Board dan limbah batu bata merah Hasil dari pengetesan uji kuat tekan beton dengan penambahan limbah Gypsum Board dan limbah batu bata merah terhadap semen didapatkanhasil yang cukup bagus Beton yang memiliki nilai kuat tekan rata-rata paling tinggi selain beton normal di miliki beton dengan campuran batu bata merah dan limbah gypsum masing-masing 10% dengan nilai kuat tekan sebesar 250,56 Kg/cm²,dan yang memiliki nilai kuat tekan paling rendah di miliki beton dengan campuran batu bata merah dan limbah gypsum masing-masing 15% dengan nilai kuat tekan 195,56 Kg/cm².

VARIASI CAMPURAN ALKALI AKTIVATOR PADA KUAT TEKAN BETON GEOPOLIMER DENGAN MENGGUNAKAN ABU CANGKANG TELUR BEBEK PADA PROSES PENGOVENAN

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Kevin Erin Hasner ◽  
Sittati Musalamah ◽  
Prihantono Prihantono
Keyword(s):  
Compressive Strength ◽  
Room Temperature ◽  
Test Machine ◽  
Concrete Compressive Strength ◽  
Oven Test ◽  
Egg Shells ◽  
Duck Egg ◽  
Average Compressive Strength ◽  
Cylindrical Test

The objective of this research is to know the increase in the value of geopolymer concrete compressive strength using duck eggshell ash with a mixture of sodium silicate and sodium hydroxidein variations of 65%: 35%, 70%: 30%, and 75%: 25% at 7 days and 28 days with oven test specimensand control concrete which are only allowed to stand at room temperature. Ass Duck egg shells used are wastes which are burned with temperatures reaching 800 ° Cfor ± 4 hours using a ceramic burning oven. This study uses cylindrical test object with a diameter of10 cm and a height of 20 cm with the quality of the plan is fc '20 MPa. Testing of geopolymerconcrete compressive strength using a Crushing Test Machine tool. The geopolymer concretecompressive strength produced by heating concrete specimens at activator variations of 65%: 35%,70%: 30%, and 75%: 25% at 7 days ie 6,157 MPa, 12,314 MPa, and 3,736 MPa, and for 28 days ie2.547 MPa, 2.760 MPa, and 1.698 MPa. While the concrete specimens which were not heated thevalue of concrete compressive strength on activator variations were 65%: 35%, 70%: 30%, and 75%:25% at 7 days, ie 2.972 MPa, 3.991 MPa, and 1.486 MPa, and for 28 days, ie 1.401 MPa, 2.123MPa, and 1,273 MPa. It can be seen that the value of the maximum average compressive strength isin the variation of activator 70%: 30% with test specimens vented at a temperature of 79 ° C first.

PENINGKATAN KUAT TEKAN BETON GEOPOLIMER DENGAN MENGGUNAKAN VARIASI ABU CANGKANG TELUR BEBEK MELALUI PROSES PENGOVENAN

2020 ◽  
Vol 15 (1) ◽  
pp. 23-29
Author(s):  
Kinanti Anastasia ◽  
Prihantono Prihantono ◽  
Anisah Anisah
Keyword(s):  
Compressive Strength ◽  
Test Object ◽  
Test Machine ◽  
Geopolymer Concrete ◽  
Duck Egg ◽  
Egg Shell ◽  
And Control ◽  
Average Compressive Strength ◽  
Cylindrical Test

The objective of this research is to know the increase of compressive strength value of geopolymer concrete using duck egg duck ash with mixture of sodium silicate and sodium hydroxide at variation 0%, 80%, 90% and 100% at 7 days with heating specimen and control concrete room temperature. Ash duck egg shell used is burnt waste with temperatures reaching 800 ° C for ± 6 hours using ceramic burning oven. This study uses cylindrical test object with diameter 10 cm and height 20 cm with the quality of plan is fc '20 MPa. Testing of compressive strength of geopolymer concrete using Crushing Test Machine tool. In this purpose, the compressive strength of the geopolymer concrete produced by the concrete test object on variations 0%; 80%; 90%; and 100% ie 0 MPa; 6,32 MPa; 8,57 MPa; and 14,01MPa, while the concrete test object No concrete compressive strength was applied on variations of 0%; 80%; 90%; and 100% ie 7,64 MPa; 4,84MPa; 5,77MPa; and 6.19MPa. It can be seen that the maximum average compressive strength value is present in the 100% variation with the tested object being tested at 83°C first.

PENGARUH CAMPURAN SERAT KULIT PINANG DAN SERBUK GERGAJI TERHADAP KUAT TEKAN BATAKO

2021 ◽  
Vol 7 (2) ◽  
pp. 69-76
Author(s):  
Winda Gustika Hami ◽  
Akbar Alfa ◽  
Rezky Kinanda
Keyword(s):  
Compressive Strength ◽  
Multiple Correlation Coefficient ◽  
Areca Nut ◽  
Betel Nut ◽  
Compressive Strength Test ◽  
Multiple Determination ◽  
Positive Effect ◽  
Average Compressive Strength ◽  
Test Objects

Abstract There are various ways to improve the quality and quality of bricks, seeing the amount of betel husk fiber waste and sawdust in the Indragiri Hilir area, the author is interested in examining the characteristics of bricks with added ingredients of areca nut fiber and sawdust in terms of compressive strength. The bricks made were solid bricks with a size of 39 cm x 9 cm x 10 cm as many as 4 samples, and each sample consisted of 5 test objects. The test used a variety of different additives, namely BSS 0 without the addition of added ingredients, BSS 1 with 5% betel nut fiber added and 2% sawdust, BSS 2 with 3% betel nut fiber added and 1% sawdust, BSS 3 with added ingredients of 1% areca nut fiber and 4% sawdust. The compressive strength test was carried out at the age of 7 days and then converted to the age of 28 days. The average compressive strength of bricks at the age of 7 days with sample codes BSS 1 20.50 kg/cm2, BSS 1 16.85, BSS 2 8.11 kg/cm2, and BSS 3 2.14 kg/cm2 . There is a positive effect of the addition of betel nut and sawdust fiber on the compressive strength of the brick are y = 17.34 + 0.57 X1 + (-3.84 X2), coefficient of multiple determination (r2) is 0.86%, and the multiple correlation coefficient (r) is 0.93.   Abstrak Berbagai macam cara untuk meningkatkan kualitas dan mutu batako, melihat banyaknya limbah serat kulit pinang dan serbuk gergaji didaerah Indragiri Hilir, penulis tertarik untuk meneliti karakteristik batako dengan bahan tambah serat kulit pinang dan serbuk gergaji ditinjau dari kuat tekannya. Batako yang dibuat adalah batako pejal dengan ukuran 39 cm x 9 cm x 10 cm sebanyak 4 sampel, dan tiap sampel terdiri dari 5 buah benda uji. Pengujian menggunakan variasi campuran bahan tambah yang berbeda, yaitu BSS 0 tanpa penambahan bahan tambah, BSS 1 dengan bahan tambah serat kulit pinang 5% dan serbuk gergaji 2%, BSS 2 dengan bahan tambah serat kulit pinang 3% dan serbuk gergaji 1%, BSS 3 dengan bahan tambah serat kulit pinang 1% dan serbuk gergaji 4%. Pengujian kuat tekan dilakukan pada umur 7 hari kemudian dikonversikan ke umur 28 hari. Kuat tekan rata-rata batako pada umur 7 hari dengan kode sampel BSS 1 20,50 kg/cm2, BSS 1 16,85, BSS 2 8,11 kg/cm2, dan BSS 3 2,14 kg/cm2. Ada pengaruh positif penambahan serat kulit pinang dan serbuk gergaji terhadap kuat tekan batako yaitu y = 17,34 + 0,57 X1 + (-3,84 X2), koefisien determinasi ganda (r2) sebesar 0,86%, dan koefisien korelasi ganda (r) sebesar 0,93.

Research on Quick Freezing Technology of Sword Bean (Canavalia gladiate)

2011 ◽  
Vol 140 ◽  
pp. 421-425
Author(s):  
Juan Xu ◽  
Qing Qing Li ◽  
Chen Wei Zhou ◽  
Rui Zhi Wang ◽  
Shan Shan Du ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Vitamin C ◽  
Important Impact ◽  
Quick Freezing ◽  
Freezing Procedure ◽  
Maximum Compressive Strength

Freezing technology has an important impact on the quality of quick frozen vegetables. In this study, followed blanching at 96.5 °C for 1.03 min, the effects of quick freezing of sword bean (Canavalia gladiate) on its quality were studied to optimize the quick freezing procedure. Electron microscope scanning was used to observe the microstructure, and maximum compressive strength and contents of vitamin C and chlorophyll were detected as well after quick freezing. The results showed that it was the optimized procedure to quick freeze sword bean was at-40 °C for 6.3 min, by which sword bean kept the best quality close to its fresh counterpart.

scholarly journals A Laboratory Scale Synthesis of Geopolymer from Locally Available Coal Fly Ash from Brick Industry

2013 ◽  
Vol 29 ◽  
pp. 18-23
Author(s):  
Rishi Babu Bhandari ◽  
Arvind Pathak ◽  
Vinay Kumar Jha
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Time Variation ◽  
Coal Fly Ash ◽  
Curing Temperature ◽  
Alkali Concentration ◽  
Curing Time ◽  
Mass Ratio ◽  
Maximum Compressive Strength

In this work, geopolymers have been synthesized from coal fly ash (CFA) using KOH and Na2SiO3 as activators. Some parameters such as alkali concentration, amount of Na2SiO3 and curing time have been varied in order to improve the quality of geopolymeric product. The geopolymerization process was carried out using 3-8 M KOH solutions, Na2SiO3 to CFA mass ratio of 0.25-2.00 and curing time variation from 6-28 days. The curing temperature was fixed at 40°C in all the cases. During the variation of KOH concentration, the maximum compressive strength of 6.62 MPa was obtained with CFA treated with 7 M KOH solution. Similarly, with the variation of the mass ratio of Na2SiO3 to CFA, the maximum compressive strength of 28.1 MPa was obtained with Na2SiO3 to CFA mass ratio of 1.75. Furthermore, the compressive strength was found to be increased with increasing curing time and 41.9 MPa was achieved with 28 days of curing time. DOI: http://dx.doi.org/10.3126/jncs.v29i0.9232Journal of Nepal Chemical SocietyVol. 29, 2012Page: 18-23Uploaded date : 12/3/2013 

scholarly journals KUAT TEKAN SELF COMPACTING CONCRETE MENGGUNAKAN GROUND GRANULATED BLAST FURNACE SLAG

2020 ◽  
Vol 13 (2) ◽  
pp. 111
Author(s):  
Anni Susilowati ◽  
Pratikto Pratikto ◽  
Dennis Yudha Praditya ◽  
Kusno Wijayanto
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Building Construction ◽  
Self Compacting Concrete ◽  
Granulated Blast Furnace Slag ◽  
Strength Based ◽  
Good Workability ◽  
Furnace Slag

Self Compacting Concrete (SCC) as one type of concrete that is mostly used in building construction has good workability and can be obtained by adding filler instead of cement. Ground Granulated Blast Furnace Slag (GGBFS) has a chemical composition similar to the content in cement. Therefore, the study of the use of GGBFS was used as a partial substitute for cement in the SCC to examine the influences and quality of GGBFS on fresh concrete and to obtain SCC with the best compressive strength. This research method uses an experimental method by making SCC concrete specimens with an initial fas of 0.4 according to ACI 211.4R-93. The specimens were worked using GGBFS levels of 0%, until 80%, and using 1,4% superplasticizer, and 2% accelerator by weight of cement. The use of GGBFS at SCC can increase the value of compressive strength of about 4,27%-25,64 compared to SCC without using GGBFS. The resulted are known that GGBFS can influence compression strength. Based on the testing of fresh and hard concrete, it concluded that the best quality of SCC used 20% of GGBFS.

scholarly journals PENELITIAN KUAT UJI TEKAN BETON DENGAN MEMANFAATKAN LIMBAH BETON YANG TIDAK TERPAKAI

UKaRsT ◽  
2017 ◽  
Vol 1 (2) ◽  
pp. 21
Author(s):  
Herlan Pratikno
Keyword(s):  
Compressive Strength ◽  
Civil Engineering ◽  
Strength Test ◽  
High Quality ◽  
Engineering Department ◽  
Compressive Strength Of Concrete ◽  
Maximum Compressive Strength ◽  
Department Faculty ◽  
Average Compressive Strength ◽  
Test Objects

ABSTRACT PrasetyoUtomo 2019. Civil Engineering Department, Faculty of Engineering, University of Kadiri in Kediri. Research on Concrete Press Strength Test by Utilizing Unused Concrete Waste. Supervised by Supervisor 1. Mr. Dr. Ahmad Ridwan, SE. ST. MT. and Supervisor 2. Mr. Yosef Cahyo SP. ST. MT. M.Eng. Concrete has many classifications and characteristics, from low-quality, medium to high-quality concrete. Along with the development of technology today many types of materials and mixtures are used. Additional materials include concrete that is not used. Tests of test objects in this study used a mixture of 10%, 15%, 20% and 25%. The variation is carried out at the age of 7, 21, and 28 days with the parameters used are only compressive strength.The results showed that the average compressive strength of concrete in each variation was 10% (22,155Mpa), 15% (17,514 Mpa), 20% (15,271 Mpa) and 25% (12,714 Mpa). With the target of K300 compressive strength, the result is mixed substitution with a maximum compressive strength percentage of 10% (22,155Mpa).

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