scholarly journals Perbandingan Kuat Tekan Dan Kuat Lentur Beton Mutu Tinggi Dengan Menggunakan Berbagai Merk Semen Di Kota Pekanbaru

2018 ◽  
Vol 18 (1) ◽  
pp. 49-58
Author(s):  
Roza Mildawati
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Concrete Compressive Strength ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Construction Services ◽  
Cement Factories ◽  
Selection Of ◽  
Cylindrical Test

[ID] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand. [EN] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand.

scholarly journals Kajian Pengaruh Variasi Material Terhadap Kuat Tekan Beton

2018 ◽  
Vol 3 (1) ◽  
pp. 55
Author(s):  
Suhendra Suhendra
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Concrete Aggregate ◽  
Fine Aggregate ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Laboratory Test Results

Aggregate quality is very influential on the strength of the resulting concrete. Both coarse and fine aggregates have various characteristics identified from laboratory test results. This study aims to examine the use of various aggregates for a quality of concrete. The coarse aggregate and the fine aggregate used are obtained from the nearest location to the work to be performed. The quality of the concrete reviewed is K-125, K-175 and K-225. The coarse aggregates used are 1-2 size (in cm), 2-3 size (in cm) crushed aggregate and coral. The fine aggregates used for each of the coarse aggregates are also different. The results showed that the coral aggregate did not meet the gradations of concrete aggregate. While the fine aggregate does not meet the gradation of concrete aggregate for the three types used. The concrete compressive strength test results show the use of coarse aggregates of 2-3 size of crushed and coarse aggregate of corals giving the average compressive strength value required for all planned concrete strength. While concrete using coarse aggregates of rocks of size 1-2 only meet the specified compressive strength, but does not meet the required compressive strength.Key words: Aggregates, concrete, compressive strength

scholarly journals Influence of Glass Fibers on Mechanical Properties of Concrete with Recycled Coarse Aggregates

2019 ◽  
Vol 5 (5) ◽  
pp. 1007-1019 ◽  
Author(s):  
Babar Ali ◽  
Liaqat Ali Qureshi ◽  
Ali Raza ◽  
Muhammad Asad Nawaz ◽  
Safi Ur Rehman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Glass Fibers ◽  
Construction Material ◽  
Concrete Compressive Strength ◽  
Coarse Aggregates ◽  
Highly Sensitive

Despite plain cement concrete presenting inferior performance in tension and adverse environmental impacts, it is the most widely used construction material in the world. Consumption of fibers and recycled coarse aggregates (RCA) can add ductility and sustainability to concrete. In this research, two mix series (100%NCA, and 100%RCA) were prepared using four different dosages of GF (0%GF, 0.25%GF, 0.5%GF, and 0.75%GF by volume fraction).  Mechanical properties namely compressive strength, splitting tensile strength, and flexural strength of each concrete mixture was evaluated at the age of 28 days. The results of testing indicated that the addition of GF was very useful in enhancing the split tensile and flexural strength of both RCA and NCA concrete. Compressive strength was not highly sensitive to the addition of GF. The loss in strength that occurred due to the incorporation of RCA was reduced to a large extent upon the inclusion of GF. GF caused significant improvements in the split tensile and flexural strength of RCA concrete. Optimum dosage of GF was determined to be 0.25% for NCA, and 0.5% for RCA concrete respectively, based on the results of combined mechanical performance (MP).

Research in the Preparation of Paving Bricks with Construction Garbage

2013 ◽  
Vol 712-715 ◽  
pp. 917-920
Author(s):  
Lian Xi Wang ◽  
Guang Hui Pan ◽  
Fu Yong Li ◽  
Hai Ming Wang ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Experimental Results ◽  
Replacement Rate ◽  
Coarse Aggregates ◽  
Waste Concrete ◽  
Fine Aggregates ◽  
Binder Ratio ◽  
Water Binder Ratio

Construction garbage paving bricks were made of recycled coarse and fine aggregates which were prepared by the waste concrete. The influence of replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage on the compressive strength and flexural strength of construction garbage paving bricks were researched. The experimental results show that optimum replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage were 100%, 0.43 and 1.5% respectively. In this proportion, the 7d, 28d compressive strength of the products were 15.6MPa, 37.5MPa respectively, and the 7d, 28d flexural strength were 2.0MPa, 4.3MPa respectively, which fit the requirements of the Cc30 level of compressive strength and the Cf4.0 level of flexural strength involved in JCT 446-2000 "concrete pavers".

scholarly journals The Benefits of Adding Corn Stalk Ash as a Substitution of Some Cement Against of Compressive Strength Concrete

2019 ◽  
Vol 4 (3) ◽  
pp. 208
Author(s):  
Sri Hartati Dewi ◽  
Roza Mildawati ◽  
Tio Perdana
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Silica Content ◽  
Corn Stalk ◽  
Strength Concrete ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Corn Plants ◽  
Construction Services

Concrete is a very important building material used in the world of construction services, and it is generally known that the good and bad properties of concrete can be seen from its compressive strength. Concrete consists of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates, and water, with or without using additional materials. Cement is one of the main mixtures of concrete constituents composed of natural resources such as lime (CaO), Silica (SiO₃), alumina (Al2O₃), little magnesia (MgO), and alkali. Silica is also found in corn. according to (Roesmarkam and Yuwono, 2002) corn plants have a Silica content of 20.6%. This study aims to determine the effect of utilization of corn stalk ash on compressive strength and modulus of elasticity of concrete. Cornstalk ash is used as a partial substitute for cement, with a mixture composition of 2%, 4%, 6%, 8%, and 10%. This study uses SNI 03-2834-2000 for mix design, with the added ingredient of 0.25% sikament NN. Cylindrical test specimen size (150 mm x 300 mm), the specimen was treated and tested at 28 days. Based on research using corn stalk ash 2%, 4%, 6%, 8%, and 10%. either without or using sikament NN the highest compressive strength at 8% is 20.8 Mpa and 20.4 Mpa, and decrease in usage of 10% corn stalk ash which is 18.2 Mpa and 18, 4 Mpa. The highest elastic modulus without or with sikament NN present in 8% ie 21656.14 Mpa and 21607.52 MPa. Modulus of Elasticity value decreased in the use of corn stalks 10% ash is 20366.28 Mpa and 20569.59 MPa. Based on the research, corn stalk ash can replace the role of part of cement in construction using corn stalk ash 8%.

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.

scholarly journals Limbah Beton Sebagai Material Agregat Halus Terhadap Kuat Tekan Karakteristik

2019 ◽  
Vol 6 (2) ◽  
pp. 145
Author(s):  
Budiman Budiman
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Building Construction ◽  
Fine Aggregate ◽  
Concrete Compressive Strength ◽  
Fine Aggregates ◽  
Fineness Modulus

Concrete waste from building construction can cause problems for the environment [1]. The use of fine aggregates from concrete waste can be a solution. The purpose of this study is to determine the value of aggregate characteristics and the value of concrete compressive strength from the utilization of concrete waste as substitution fine aggregate use the DOE (department of environment) method and referring to standards SNI. This study used 50% and 60% waste mortal substitution on sand. The results showed that the characteristics of fine aggregate and coarse aggregate met the characteristic requirements for fineness modulus sand of 2.65 (Zone 2) while the aggregate was roughly 6.44 (Zone 3). The value of compressive strength with 50% and 60% concrete waste substitution each obtained the value of characteristic compressive strength of 57.24 kg / cm² and 101.03 kg / cm². The value of using mortar waste as fine aggregate substitution gives a positive value to the quality of concrete. This is evidenced increase in the value of 14.89% in concrete waste substitution 60%.

Effect of Stone Ash Mixture and Coconut Fiber on Concreate Compressive Strenght

2020 ◽  
Vol 6 (4) ◽  
pp. 462-471
Keyword(s):  
Compressive Strength ◽  
Laboratory Tests ◽  
Concrete Compressive Strength ◽  
Coconut Fiber ◽  
Normal Concrete ◽  
Strength Concrete ◽  
Coarse Aggregates ◽  
Concrete Mixtures ◽  
Fine Aggregates ◽  
Coconut Fibers

Abstract: The composition of the concrete mixture determines the compressive strength. Concrete mixtures generally consist of cement, water, coarse aggregates, fine aggregates, and concrete drugs. In this study, it will be tried to mix stone ash and coconut fibers. The purpose of this study is to find out the concrete compressive strength with add stone ash and coconut fibers to normal concrete. Data was collected through laboratory tests by carrying out an additional mixture of stone ash and coconut fibers. There were six types of specimens produced which were measured for 7, 14, 21, and 28 days. Variation of specimens 1) normal concrete, 2) normal concrete + stone ash, 3) normal concrete + coconut fiber (1.5%), 4) normal concrete + stone ash and coconut fiber (1.5%), 5) normal concrete + stone ash and 1% coconut fiber, 6) normal concrete + 1% coconut fiber. From the results of testing the concrete compressive strength was obtained 455 kg/cm2 for the age of concrete for 28 days with a mixture of normal concrete + stone ash.

scholarly journals THE EFFECT OF ADDITIVE WITH FOAM AGENT AND COCONUT SHELL ON LIGHTWEIGHT CONCRETE

Neutron ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 72-79
Author(s):  
Fikki Efendi ◽  
Fredy Kurniawan ◽  
Diah Ayu Restuti Wulandari
Keyword(s):  
Compressive Strength ◽  
Building Materials ◽  
Lightweight Concrete ◽  
Economic Status ◽  
Coconut Shell ◽  
Coarse Aggregates ◽  
Shell Waste ◽  
Coconut Shells ◽  
Selection Of

Concrete houses have a higher social and economic status. This study provides another consideration for the selection of building materials (Wonorahardjo, 2008). There are several ways that can be used to make concrete lighter, including using lightweight aggregates, substituting coarse aggregates with foam agents, adding coconut shells and additives where coconut shell waste has not been used optimally. In this research, a lightweight concrete mixture made from additives 5M additive, foam agent and coconut shell using 3 kg cement composition. While the 5M additives variation of 3%, 5%, 10%, 15% of cement, 15 milliliters of foam agent and coconut shell of 1%, with consideration of the specimens for 28 days not soaked non-curing. The test specimen is made with a size of 15x30 cm. This study is to determine the weight, compressive strength of the lightweight concrete produced. The results of research on the use of additional 5M additives, foam agents and coconut shells cause concrete to be lighter and compressive strength decreases. The weight of light concrete at 28 days not soaked is 775 kg / cm3, while the quality of concrete is 22 kg / cm2.

scholarly journals Korelasi Kuat Lentur Beton Dengan Kuat Tekan Beton

2018 ◽  
Vol 18 (2) ◽  
pp. 43-54
Author(s):  
Anggi Suryani ◽  
Sri Hartati Dewi ◽  
Harmiyati Harmiyati
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Day Treatment ◽  
Mix Design ◽  
Concrete Compressive Strength ◽  
Concrete Construction ◽  
K Value ◽  
Concrete Mix Design ◽  
Compressive Strength Of Concrete

[ID] Penggunaan konstruksi beton diminati karena beton memiliki sifat-sifat yang menguntungkan seperti ketahanannya terhadap api, awet, kuat tekan yang tinggi dan dalam pelaksanaannya mudah untuk dibentuk sesuai dengan bentuk yang dikehendaki. Tetapi konstruksi beton juga mempunyai kelemahan-kelemahan antara lain kemampuan menahan kuat lentur yang rendah sehingga konstruksinya mudah retak jika mendapatkan regangan lentur. Hal ini menjadikan pengujian kuat lentur beton sebagai persyaratan dalam penerimaan hasil pekerjaan. Namun disisi lain dalam hal pembuatan campuran beton yang selama ini mengacu pada kuat tekan, menjadi tantangan bagi pelaksana yang harus melakukan perencanaan beton (mix design) dan trial mix terlebih dahulu, sehingga perlu dilakukan pengkoreksian. Sehingga penelitian ini bermaksud untuk memperoleh hasil kuat lentur dan kuat tekan beton dengan menghasilkan nilai korelasi kuat lentur beton terhadap kuat tekan beton sesuai kuat lentur dan kuat tekan yang direncanakan maupun disyaratkan. Penelitian ini menggunakan metode Departemen of Environment (DoE) dalam SNI 03-2834-2000 untuk mix design beton. Perencanaan mutu beton K-500 dan kuat lentur rencana fs = 45 kg/ (4,4 MPa) dengan penggunaan bahan tambah superplaticizer 0,5% merk TanCem 20 RA dengan benda uji balok, silinder, dan kubus, dengan slump rencana 30-60 mm. hasil penelitian bahwa pada perawatan 14 dan 28 hari diperoleh hasil pengaruh terhadap beton tanpa superplaticizer 0,5% dengan beton penggunaan bahan tambahan superplaticizer 0,5% terjadi peningkatan pada perawatan 14 hari dengan benda uji balok sebesar 3,26% dan kubus sebesar 22,25%. Peningkatan pada perawatan 28 hari benda uji balok sebesar 3,36%, silinder sebesar 8,09% dan kubus sebesar 7,56%. Terjadi penurunan pada perawatan 14 hari dengan benda uji silinder sebesar 3,21%. Hasil korelasi kuat lentur dengan kuat tekan beton benda uji balok dan silinder, dari hasil mendapatkan nilai korelasi pada perawatan 14 hari tanpa dan dengan tambahan zat addiktif superplaticizer 0,5% didapat persamaan bahwa fs = K√f'c : nilai K sebesar 0,96 dan 0,87, sedangkan pada perawatan 28 hari tanpa dan dengan tambahan zat addiktif superplaticizer 0,5% didapat persamaan bahwa fs = K√f'c : nilai K sebesar 0,86 dan 0,99, maka dapat disimpulkan dari hasil penelitian ini nilai korelasi kuat lentur beton dengan kuat tekan beton bahwa berhubungan sangat kuat yang mana nilai koefisien korelasi di antara 0,80 sampai 1,00. [EN] The use of concrete construction is desirable because concrete has beneficial properties such as resistance to fire, durability, high compressive strength and in its implementation it is easy to be formed in accordance with the desired shape. But concrete construction also has weaknesses such as the ability to hold low flexural strength so that the construction is easily cracked if it gets a flexible strain. This makes testing the flexural strength of concrete as a requirement in receiving work results. But on the other hand in terms of making concrete mixes which have been referring to compressive strength, it is a challenge for implementers who have to do concrete planning (mix design) and trial mix first, so correction is necessary. So that this study intends to obtain the results of flexural strength and compressive strength of concrete by producing a correlation value of the flexural strength of the concrete to the compressive strength of the concrete according to the flexural strength and compressive strength planned or required. This study uses the Department of Environment (DoE) method in SNI 03-2834-2000 for concrete mix design. Planning the quality of K-500 concrete and planned flexural strength fs = 45 kg / cm ^ 2 (4.4 MPa) with the use of added ingredients 0.5% superplaticizer TanCem 20 RA brands with beam specimens, cylinders and cubes, with slump plans 30-60 mm. The results of the study showed that the treatment of 14 and 28 days obtained the effect of concrete without a 0.5% superplaticizer with concrete using 0.5% superplaticizer was increased in 14 days treatment with beam specimens of 3.26% and cube of 22, 25%. The increase in the 28-day treatment of beam specimens was 3.36%, cylinders were 8.09% and cubes were 7.56%. There was a decrease in 14-day treatment with cylindrical specimens of 3.21%. The results of the correlation of flexural strength with concrete compressive strength of beam and cylinder specimens, from the results of obtaining a correlation value on treatment 14 days without and with additional additives 0.5% superplaticizer obtained the equation that fs = K√f'c: K value of 0 96 and 0.87, while the 28-day treatment without and with additional additives of 0.5% superplaticizer obtained the equation that fs = K√f'c: K value of 0.86 and 0.99, it can be concluded from the results of the study This correlation value of concrete flexural strength with concrete compressive strength is very strongly related where the correlation coefficient value is between 0.80 to 1.00.

scholarly journals Evaluation of Self-Compacting Concrete Strength with Non-Destructive Tests for Concrete Structures

2019 ◽  
Vol 9 (23) ◽  
pp. 5109 ◽  
Author(s):  
Miguel C. S. Nepomuceno ◽  
Luís F. A. Bernardo
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Surface Hardness ◽  
Pulse Velocity ◽  
Concrete Compressive Strength ◽  
Self Compacting Concrete ◽  
Coarse Aggregates ◽  
Pull Out ◽  
Concrete Maturity ◽  
Non Destructive

Self-compacting concrete (SCC) shows to have some specificities when compared to normal vibrated concrete (NVC), namely higher cement paste dosage and smaller volume of coarse aggregates. In addition, the maximum size of coarse aggregates is also reduced in SCC to prevent blocking effect. Such specificities are likely to affect the results of non-destructive tests when compared to those obtained in NVC with similar compressive strength and materials. This study evaluates the applicability of some non-destructive tests to estimate the compressive strength of SCC. Selected tests included the ultrasonic pulse velocity test (PUNDIT), the surface hardness test (Schmidt rebound hammer type N), the pull-out test (Lok-test), and the concrete maturity test (COMA-meter). Seven sets of SCC specimens were produced in the laboratory from a single mixture and subjected to standard curing. The tests were applied at different ages, namely: 1, 2, 3, 7, 14, 28, and 94 days. The concrete compressive strength ranged from 45 MPa (at 24 h) to 97 MPa (at 94 days). Correlations were established between the non-destructive test results and the concrete compressive strength. A test variability analysis was performed and the 95% confidence limits for the obtained correlations were computed. The obtained results for SCC showed good correlations between the concrete compressive strength and the non-destructive tests results, although some differences exist when compared to the correlations obtained for NVC.

Sign in / Sign up

Export Citation Format

Share Document