scholarly journals PERILAKU DAN ANALISA KEKUATAN PANEL PRACETAK FERROFOAM CONCRETE YANG DIBEBANI LENTUR STUDI KASUS : PANEL PRACETAK BERBENTUK U (LU)

2018 ◽  
Vol 1 (4) ◽  
pp. 895-902
Author(s):  
Zulfan Effendi ◽  
Abdullah Abdullah ◽  
Mochammad Afifuddin
Keyword(s):  
Shear Failure ◽  
Lightweight Concrete ◽  
Precast Concrete ◽  
Normal Weight ◽  
Mix Design ◽  
Foam Concrete ◽  
Construction Methods ◽  
Concrete Mix Design ◽  
Precast Construction ◽  
Lightweight Foam

Abstract: The construction industry still depends on conventional construction methods. The concept of conventional construction must start to look for alternatives. One of them is by using precast panels. Construction precast panels typically use normal concrete, concrete weaknesses of normal weight is too heavy. The use of lightweight concrete in precast construction can solve the problem. One type of lightweight concrete used is lightweight foam concrete. The use of lightweight foam concrete in construction of precast panels facilitate the progress in the field, able to be appointed by the workforce. The aim of research to determine the behavior and capacity analysis ferrofoam precast concrete panels loaded U-shaped bending. This experiment is testing the U-shaped bending (LU) lightweight foam concrete. Dimensions of the test specimen with a length of 2200 mm, width 600 mm and 500 mm, height 120 mm and 80 mm, 30 mm thick. Concrete mix design based on the density is 1600 kg/m3 with FAS 0.4 and 21 MPa quality plan. The results showed that the maximum capacity of panel LU 600-120 1.34 tf at 26.81 mm deflection, LU 600-80 at 0.79 tf at 46.85 mm deflection, LU 500-80 on a deflection of 0.69 tf 39 , 82 mm. Model panel collapse LU LU 600-120 and 600-80 is shear failure, but for LU 500-80 flexural failure. Ductility panel LU 600-80 only 87% of ductility LU 600-120 is a panel with high variation. Ductility panel with wide variations LU panel 500-80 88% biggest than the LU 600-80. Abstrak: Industri konstruksi masih tergantung dengan metode konstruksi konvensional. Konsep konstruksi konvensional harus mulai dicarikan alternatif pengganti. Salah satunya adalah dengan menggunakan metode panel pracetak. Konstruksi panel pracetak biasanya menggunakan beton normal, kelemahan beton normal bobot terlalu berat. Penggunaan beton ringan pada konstruksi pracetak dapat menyelesaikan permasalahan tersebut. Salah satu jenis beton ringan yang digunakan adalah beton ringan busa. Penggunaan beton ringan busa pada konstruksi panel pracetak memudahkan dalam pengerjaan dilapangan, mampu diangkat oleh tenaga kerja. Tujuan penelitian untuk mengetahui perilaku dan analisa kapasitas panel pracetak ferrofoam concrete berbentuk U yang dibebani lentur. Pengujian yang dilakukan adalah pengujian lentur berbentuk U (LU) beton ringan busa. Dimensi benda uji dengan panjang 2200 mm, lebar 600 mm dan 500 mm, tinggi 120 mm dan 80 mm, tebal 30 mm. Mix design beton berdasarkan berat jenis yaitu 1,6 dengan FAS 0,4 dan mutu rencana 21 MPa. Hasil penelitian adalah kapasitas maksimum panel LU 600-120 sesebar 1,34 tf pada lendutan 26,81 mm, LU 600-80 sebesar 0,79 tf pada lendutan 46,85 mm, LU 500-80 sebesar 0,69 tf pada lendutan 39,82 mm. Model keruntuhan panel LU 600-120 dan LU 600-80 adalah keruntuhan geser, namun untuk LU 500-80 keruntuhan lentur. Daktilitas panel LU 600-80 hanya 87% dari daktilitas LU 600-120 merupakan panel dengan variasi tinggi. Daktilitas panel dengan variasi lebar panel LU 500-80 lebih besar 88% dibanding LU 600-80.

scholarly journals LIGHTWEIGHT CONCRETE MAKING ANALYSIS USING MIXED CELLULOSE

2019 ◽  
Vol 2 (2) ◽  
pp. 85-91
Author(s):  
Nanang Budi Setyawan ◽  
Fredy Kurniawan
Keyword(s):  
Compressive Strength ◽  
Experimental Method ◽  
Lightweight Concrete ◽  
Mix Design ◽  
Waste Paper ◽  
Test Results ◽  
Concrete Mix Design ◽  
Concrete Mix ◽  
Recycle Paper ◽  
Compressive Strength Of Concrete

Development era of globalization has resulted in increasing number of second-hand goods / waste that its existence can be a problem for life in the future. Many things are done in order to recycle paper cement in order to overcome this problem the existence of waste. One way is to use waste paper to be a part of the building. The purpose of this study, to determine the compressive strength and optimum density. Laboratory experimental method uses a variation of 10%, 20%, 30% and testing conducted in the form of compressive strength and density. From the test results obtained by the result of decrease in the compressive strength and density. In addition cellulose concrete mix design with variations determined that 10%, 20%, 30% resulted in a decrease in the compressive strength of concrete,

scholarly journals PERILAKU BALOK PROFIL KANAL (C) KONSFIGURASI (I) FERROFOAM CONCRETE DENGAN VARIASI TINGGI PROFIL AKIBAT BEBAN LENTUR

2018 ◽  
Vol 1 (4) ◽  
pp. 823-830
Author(s):  
Farid Saputra ◽  
Mochammad Afifuddin ◽  
Abdullah Abdullah
Keyword(s):  
Test Object ◽  
Test Specimen ◽  
Lightweight Concrete ◽  
High Strength ◽  
Mix Design ◽  
Foam Concrete ◽  
Concrete Technology ◽  
The People ◽  
Bending Load ◽  
Technological Developments

Abstract: Many areas have inadequate transportation infrastructure. The current technological developments, demanding the construction of easy to move. To accomplish this, a concrete technology is required that can provide lightweight concrete with high strength. Lightweight concrete technology is also urgently needed, to make innovations in the technical work of the new world of construction. For that combination of ferrocement and foam concrete can be a technology solution needed by the people of Indonesia today. The purpose of this study was to obtain information about the behavior of the confined ferrofoam concrete channel block beam I due to the bending load. The observed behavior in this research is the capacity of the beam in accepting the load, the deflection that occurs as well as the resulting crack pattern and the type of collapse. The test specimen to be made is a C-shaped profile with a height variation of 1500 mm, 200 mm, and 300 mm, a width of 100 mm, and a thickness of 30 mm. Test object repeats using D8 (Threaded Steel), and wiremesh layer of 3 layers. Mix design based on specific gravity of 1600 kg/m3 with FAS 0,4 and addition of pozolan equal to 10%. Results obtained 200-3L test object increased capacity by 38% compared to 150-3L test object, 300-3L increased by 97% compared to 150-3L. 200-3L test object decreased deflection by 12% compared to 150-3L, 300-3L test object decreased 61% compared to 150-3L. 200-3L test specimen increased 7% ductility compared to 150-3L test object, 300-3L increased by 76% compared to 150-3L. The overall profile failure is a sliding bending failure. Abstrak: Banyak daerah yang infrastruktur transportasinya belum memadai. Perkembangan teknologi saat ini, menuntut adanya konstruksi yang mudah untuk dipindahkan. Untuk mewujudkan hal ini, dibutuhkan suatu teknologi beton yang bisa menyediakan beton ringan dengan kekuatan yang tinggi. Teknologi beton yang ringan juga sangat dibutuhkan, untuk membuat inovasi dalam teknis pekerjaan baru didunia konstruksi. Untuk itu kombinasi wiremesh dan foam concrete bisa menjadi solusi teknologi yang dibutuhkan oleh masyarakat Indonesia saat ini. Tujuan dari penelitian ini adalah mendapatkan informasi tentang perilaku dari balok profil kanal ferrofoam concrete yang dikonfigurasi I akibat beban lentur. Perilaku yang ditinjau pada penelitian ini berupa kapasitas balok dalam menerima beban, lendutan yang terjadi serta pola retak yang dihasilkan dan jenis keruntuhannya. Benda uji yang akan dibuat adalah profil berbentuk kanal C dengan variasi tinggi masing-masing 1500 mm, 200 mm, dan 300 mm, lebar 100 mm, dan ketebalan 30 mm. Penulangan benda uji menggunakan D8 (Baja Ulir), dan lapisan wiremesh sebanyak 3 lapisan. Mix design berdasarkan berat jenis yaitu 1600 kg/m3 dengan FAS 0,4 dan penambahan pozolan sebesar 10%. Hasil yang didapatkan benda uji 200-3L terjadi peningkatan kapasitas sebesar 38% dibandingkan benda uji 150-3L, 300-3L meningkat sebesar 97% dibanding 150-3L. Benda uji 200-3L terjadi penurunan lendutan sebesar 12% dibandingkan benda uji 150-3L, 300-3L menurun sebesar 61% dibanding 150-3L. Benda uji 200-3L terjadi peningkatan daktilitas sebesar 7% dibandingkan benda uji 150-3L, 300-3L meningkat sebesar 76% dibanding 150-3L. Kegagalan profil yang terjadi secara keseluruhan yaitu kegagalan lentur geser.

Evaluation of Silica Fume Effect on Compressive Strength of Structural Lightweight Concrete Containing LECA as Lightweight Aggregate

2012 ◽  
Vol 626 ◽  
pp. 344-349 ◽  
Author(s):  
Maryam Mortazavi ◽  
Mojtaba Majlessi
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Considerable Increase ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Normal Weight ◽  
Mix Design ◽  
Strength Gain ◽  
Experimental Phase ◽  
Normal Weight Concrete

The purpose of this paper is to evaluate the effect of silica fume on compressive strength of structural lightweight concrete, containing saturated LECA (Light Expanded Clay Aggregate) as lightweight aggregate (LWA). In experimental phase of study 120 cubic specimens (10*10*10) were made and cured. For every mix design, different cement percentages were replaced with silica fume, containing same amount of saturated LECA. The mixes incorporate 0%, 5%, 10%, 15%, 20%, 25% silica fume. Constant level of Water/Cement ratio (0.37) was considered. For each mix design 20 specimens were prepared and cured for 7, 14, 28, 42 days in standard 20 C water. Also 20 specimens with the same mix design of 0% silica fume as normal weight concrete were prepared and cured to compare the results. For these specimens LECA were replaced with same volume and size of sand. The testing results showed; increasing silica fume causes considerable increase in compressive strength. The rate of strength gain slows down at high percentage of silica fume. Also silica fume leads concrete to get higher initial compressive strength at certain time compared with normal weight concrete.

PENGARUH PEMANFAATAN ABU SEKAM PADI PADA BATA BETON RINGAN FOAM TERHADAP KUAT TEKAN, BERAT JENIS, DAN DAYA SERAP AIR SEBAGAI SUPLEMEN BAHAN AJAR MATA KULIAH TEKNOLOGI BETON (PADA MAHASISWA SEMESTER III PTB FKIP UNS)

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
Ari Sri Wahyuni ◽  
Chundakus Habsya ◽  
Ernawati Sri Sunarsih
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Lightweight Concrete ◽  
Foam Concrete ◽  
Concrete Technology ◽  
Course Materials ◽  
Dependent Variables ◽  
Course Material ◽  
Lightweight Foam

<p>The purposes of this research were to, (1) determine the influence of rice husk ash as smooth aggregate partial substitute and foam variation towards compressive strength, density, and absorption of lightweight foam concrete brick, (2) determine the percentage of rice husk ash as smooth aggregate partial substitute and foam variation to achieve the compressive strength which fulfilled SNI No. 03 – 0349 – 1989, (3) determine the percentage of rice husk ash as smooth aggregate partial substitute and foam variation to achieve the density lightweight concrete which fulfilled SNI No. 03 – 0349 – 1989, (4) determine the percentage of rice husk ash as smooth aggregate partial substitute and foam variation to achieve the absorption which fulfilled SNI No. 03 – 0349 – 1989, (5) produce course material supplement of concrete technology on the influence of using rice husk ash in lightweight foam concrete brick toward compressive strength, density, and absorption. <br />This research used experimental method and data analysis techniques used regression analysis. Variables in the study were (1) dependent variables: compressive strength, density, and absorption of lightweight foam concrete bricks, (2) independent variables: the substitute of smooth aggregate to rice husk ash with variation 0%, 25%, 35%, and 45% and foam variation 0,2 and 0,3 of concrete volume.<br />Based on the results of the study concluded that, (1) variation of rice husk ash and foam was strongly influence towards the compressive strength, density, and absorption of lightweight foam concrete bricks, (2) There was no percentage of rice husk ash and foam to achieve the compressive strength of lightweight foam concrete brick which fulfilled SNI No. 03 – 0349 – 1989, (3) All percentages of rice husk ash and foam variation produced the density value of lightweight foam concrete brick which fulfilled SNI No. 03 – 0349 – 1989, (4) All percentages of rice husk ash and foam variation produced the absorption value of lightweight foam concrete brick which fulfilled SNI No. 03 – 0349 – 1989, (5) the output course materials was a course materials supplement about the influence of the use rice husk ash as partly smooth agregate substitute of lightweight foam concrete brick to compressive strength, density, and absorption.</p><p>Keywords: rice husk ash, foam, lightweight foam concrete bricks.</p><span><span><br /></span></span>

Morphology of Formulated Used Cooking Oil Foam (FUSCOF) Created for Lightweight Greencrete

2013 ◽  
Vol 701 ◽  
pp. 270-274
Author(s):  
M.M.A. Hafiz ◽  
A.R.M. Ridzuan ◽  
A.M. Faiza ◽  
Mohd Fadzil Arshad ◽  
J. Nurliza
Keyword(s):  
Major Element ◽  
Lightweight Concrete ◽  
Mix Design ◽  
Curing Process ◽  
Foaming Agent ◽  
Morphology Study ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Ambient Curing ◽  
Lightweight Foam

This paper presents the potential of utilizing used cooking oil as a foaming agent in the production of lightweight concrete. This morphology study is to observe the development of Fuscof as foam agent in lightweight greencrete after ambient curing process. Foam formulated was produced derived by utilization the waste of used cooking oil. The mortar phase of FUSCOF lightweight greencrete was formed. Then, the material morphology of the lightweight greencrete was analysis by using FESEM. The morphology of FUSCOF greecrete was then compared with a lightweight foam produced from commercial synthetic foam agent. The water cement ration has been determined for this mix design is 0.6. The density of FUSCOF lightweight greencrete was 1200. The age of the ambient curing process was varied between ±30-day and ±60-day. The maturation of the mortar was observed. As a result, the major element was Calcium, Ca has been detected by EDAX.

scholarly journals EFFECT OF FOAMING AGENT IN SELF CONSOLIDATING LIGHTWEIGHT CONCRETE (SCLC)

2019 ◽  
Vol 81 (4) ◽  
Author(s):  
Mohd Afiq Mohd Fauzi ◽  
Ahmad Ruslan Mohd Ridzuan ◽  
Nurliza Jasmi ◽  
Mohd Fadzil Arshad ◽  
Mohd Shafee Harun
Keyword(s):  
Compressive Strength ◽  
Lightweight Concrete ◽  
Foam Concrete ◽  
Concrete Technology ◽  
Normal Concrete ◽  
Conventional Concrete ◽  
Foaming Agent ◽  
Self Consolidating Concrete ◽  
Strength Performance ◽  
Lightweight Foam

Self-Consolidating Lightweight Concrete (SCLC) is relatively a new concept and can be regarded as a revolutionary development in the field of concrete technology. It is a type of concrete that might not require vibration for placing it and could be produced by reducing the density of concrete. However, the density of normal Self Consolidating Concrete (SCC) is similar to normal concrete approximately 2400kg/m3. By using foaming agent, the density of concrete can be reduced up to 1800kg/m3. Due to the heavy density of concrete, it will give the initial higher supply cost over conventional concrete, has slowed down its application to general construction. It is also hard to handle for construction and transportation. Therefore, it is advantages to produce SCC with lower density to provide benefit and enhancement of its performance by a combination of two types of concrete technology that is SCC technology and Lightweight Foam Concrete technology. This paper was focused to identify the effect of foaming agent on the fresh properties and compressive strength of SCLC. The influence of foaming agent contained in the range from 0 second, 1 second, 2 second, 3 second and 4 second to the strength characteristic identified in the SCLC. The specimens were tested for compressive strength at 3, 7, 14 and 28 days. The result indicated that the compressive strength of SCLC is decreasing when foaming agent content was added. Meanwhile, the flowability of SCLC is increasing when foaming agent content added. Based on the finding, SCLC containing 3 second of foaming agent is achieving the density target, which is 1800kg/m3 and better compressive strength performance.

Optimizing Concrete Mix Design for Application in 3D Printing Technology for the Construction Industry

2017 ◽  
Vol 263 ◽  
pp. 24-29 ◽  
Author(s):  
Refilwe Lediga ◽  
Deon Kruger
Keyword(s):  
3D Printing ◽  
Construction Industry ◽  
Three Dimensions ◽  
Mix Design ◽  
Layer By Layer ◽  
Construction Methods ◽  
Concrete Mix Design ◽  
Concrete Mix ◽  
Traditional Construction ◽  
Concrete Pump

This paper presents an overview of an investigation into the application of additive manufacturing commonly known as 3D printing specifically within the construction industry. 3D concrete printing is a new and innovative way of construction and can be used for the manufacturing of micro to macro high precision construction components. If correctly designed and used, this method has various advantages over traditional construction methods as it creates opportunities to reduce time and cost. A crucial component for success is an optimized concrete or mortar mix to ensure proper feed, placement and hardening during the 3D printing process. A 3D concrete printer uses a chemically altered concrete or mortar mix, which is pumped through a concrete extruder/nozzle that is carefully controlled in three dimensions. This extruder is controlled by a computerised gantry system, and prints components and structures layer by layer. The key components in such a system are therefore a concrete pump, an extruder, an optimized printable concrete mix and a computerised gantry system. The paper will present an investigation into the criteria for an optimum concrete mix design to be used in a 3D concrete printing machine.

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