scholarly journals Kelayakan Abu Terbang PLTU Buntoi Sebagai Campuran Beton Geopolimer

2021 ◽  
Vol 9 (2) ◽  
pp. 102-108
Author(s):  
Dadang Suriyana ◽  
Liliana Sahay ◽  
Okta Meilawaty
Keyword(s):  
Compressive Strength ◽  
Strength Test ◽  
Geopolymer Concrete ◽  
Conventional Concrete ◽  
Second Stage ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete ◽  
Maximum Compressive Strength ◽  
Geopolymer Material ◽  
Geopolymer Paste

The main basic ingredients needed for the manufacture of this geopolymer material are materials that contain a lot of silica and aluminia elements. The 1st stage test was carried out to determine the geopolymer paste with the maximum compressive strength at the ratio of NaOH to Na2SiO3 of 1; 1.5; 2; 2.5. The second stage of testing was carried out using a geopolymer paste with the highest compressive strength, namely the ratio of NaOH to Na2SiO3 of 2.5 with a compressive strength of 22.56 MPa. Based on the results of the compressive strength test, the maximum compressive strength at the age of 28 days is 7.64 MPa. The results of the compressive strength of concrete are much lower than the compressive strength of the paste, it shows that the paste does not bind too much with the aggregate. This is evidenced by the results of the compressive strength of conventional concrete which is much higher than that of geopolymer concrete using the same aggregate. With the results of the maximum compressive strength at the age of 28 days is 29.51 MPa.

scholarly journals Properties of Self-curing High Strength Concrete by using Baby Polymer Diapers

2018 ◽  
Vol 203 ◽  
pp. 06022
Author(s):  
Salmia Beddu ◽  
Daud Mohamad ◽  
Fadzli Mohamed Nazri ◽  
Siti Nabihah Sadon ◽  
Mohamed Galal Elshawesh
Keyword(s):  
Compressive Strength ◽  
High Strength Concrete ◽  
Drying Shrinkage ◽  
High Strength ◽  
Strength Test ◽  
Curing Process ◽  
Compressive Strength Test ◽  
Mechanical And Physical Properties ◽  
Compressive Strength Of Concrete ◽  
Strength And Durability

This study investigates the self-curing concrete using baby polymer diapers as substitute method of curing process in order to improve mechanical and physical properties of concrete. Three different proportion of baby polymer diapers which are 1%, 3% and 5% were mix with concrete. Slump, compressive strength and drying shrinkage test were performed in order to study the workability, strength and durability of the concrete. All concrete were tested for 1, 3, 7, 14, and 28 days for drying shrinkage test. Meanwhile, all concrete were test at 3, 7 and 28 days for compressive strength test. Compressive strength of concrete containing 5% baby polymer diapers show the highest strength at 28 days compared to others percentage. Thus, it indicates that application of baby polymer diaper as self-cure agent can improve the concrete performances.

The Effect of Different Curing Conditions on Compressive Strength of Concrete

2017 ◽  
Vol 60 (3) ◽  
pp. 147-153
Author(s):  
Muhammad Arslan ◽  
Muhammad Asif Saleem ◽  
Maria Yaqub ◽  
Muhammad Saleem Khan
Keyword(s):  
Compressive Strength ◽  
Research Work ◽  
Concrete Structures ◽  
Strength Test ◽  
The Other ◽  
Cylindrical Shape ◽  
Curing Conditions ◽  
Compressive Strength Test ◽  
Different Types ◽  
Compressive Strength Of Concrete

The focus of this research work was to analyse the effect of different types of curing oncompressive strength of concrete structures. For this purpose, 54 test specimens of cylindrical shape wereprepared. These specimens were cured with different methods and were tested on different age days toanalyse the effect of curing on compressive strength. Test specimens cured with conventional water curingmethod gives the highest results as compared to the other adopted methods.

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 Comparison of Compressive Strength of Concrete by Partial Replacement of Cement with GGBS and Silica Fume with Sea Water Curing and Addition with Fibers

2021 ◽  
pp. 31-39
Author(s):  
A Aswani and Janardhan G
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Sea Water ◽  
Glass Fibers ◽  
Vital Role ◽  
Strength Test ◽  
Partial Replacement ◽  
Compressive Strength Test ◽  
Water Curing ◽  
Compressive Strength Of Concrete

In construction world concrete plays a vital role, around 60% of structure consists of Concrete. However, the production of Portland cement, an essential constituent of concrete, leads to the release of significant amounts of CO2, depletion of natural resources and environmental degradation. This paper investigates the compressive strength of concrete by replacing cement with GGBS and silica fume effect of glass fibers on performance of concrete is studied. In this present work a humble attempt had been made to evaluate and compare the compressive strengths of GGBS blended concrete cubes with controlled concrete cubes cured under sea water for 28 days. By conducting the tests on the cubes, conclusions were drawn after plotting and analyzing the results. Compressive strength test is conducted on the samples after 28 days. The optimum value is obtained at 15% replacement with GGBS and 5% with Silica fume. In this study again we trailed addition with Glass fibers with the percentage of 0.5%,1.0%,1.5%, compressive strength have been studied. Finally at 1.0% addition we get maximum strength compared to controlled mix.

scholarly journals KANDUNGAN KIMIA DARI LIMBAH LUMPUR INSTALASI PENGOLAHAN AIR MINUM UNTUK BETON GEOPOLIMER DENGAN XRF

2019 ◽  
Vol 7 (2) ◽  
pp. 48
Author(s):  
Nuryanti Nuryanti ◽  
Ridha Arizal ◽  
Dian Arrisujaya
Keyword(s):  
Waste Water ◽  
Compressive Strength ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Fine Sand ◽  
Strength Test ◽  
Geopolymer Concrete ◽  
X Ray ◽  
Compressive Strength Test

Chemical Containt of Waste Water Installation of Drinking Water Treatment for Geopolymer Concrete by XRF Preparation of geopolymer concrete from waste water installation of drinking water treatment (WIDWT) was manufactured in accordance with SNI. Specimen of size 5 x 5 x 5 cm cubes was used for the concretes. The mortar material consisted of binders, activator, aggregate (fine sand) and water (60% of aggregate and 40% of activators and binders). The composition of the activator and binder mixture were 1: 2; 1: 1,5; 1: 1; 1.5: 1; and 2: 1. The results of the comparison of binders A and B were 4.2: 1 and 6.5: 1. The binders were divided into 2 types: A binder (sludge of WIDWT was dried with oven at 105oC for 24 hours) and B Binder (sludge of WIDWT was dried by kiln at 650oC for 6 hours). The highest compressive strength test was 10.00 MPa on binder A with the ratio of activator and binder 1: 1 and Si: Al ratio (4.2: 1). Binder B with a compressive strength of 9.87 MPa with the ratio of activator and binder 1.5: 1 and Si: Al ratio (6.5: 1). Samples of IPAM sludge waste were tested by X-Ray Fluorescence (XRF), compressive strength testing of mortar geopolymer with Toni-Technik compressive strength test. The highest value of compressive strength appropriated to SNI 03-0691-1996 in class D which can be applied for City Park.Keywords: geopolymer, WIDWT, XRF, activator, binder ABSTRAK Pembuatan beton geopolimer dari limbah instalasi pengolahan air minum (IPAM) telah dilakukan. Beton geopolimer dibuat sesuai dengan SNI pembuatan mortar geopolimer dengan ukuran 5 x 5 x 5 cm. Bahan mortar terdiri dari binder, larutan aktivator dan agregat (pasir halus) serta air dengan perbandingan 60% (agregat) dan 40%(aktivator dan binder). Parameter variasi campuran aktivator dan binder yaitu 1:2; 1:1,5; 1:1; 1,5:1; dan 2:1. Binder dibagi menjadi 2 jenis yaitu Binder A (lumpur IPAM yang dikeringkan dengan oven pada suhu 105oC selama 24 jam) dan Binder B (lumpur IPAM yang dikeringkan dengan tanur pada suhu 650oC selama 6 jam). Hasil perbandingan binder A dan B adalah 4,2:1 dan 6,5:1. Hasil uji kuat tekan tertinggi sebesar 10,00 Mpa pada binder A dengan perbandingan aktivator dan binder 1:1 dengan perbandingan Si:Al (4,2:1). Binder B dengan kuat tekan 9,87 Mpa dengan perbandingan aktivator dan binder 1,5:1 dengan perbandingan Si:Al (6,5:1). Sampel limbah lumpur IPAM diuji dengan X-Ray Flourescene (XRF), pengujian kuat tekan mortar geopolimer dengan alat uji kuat tekan merk Toni-Technik. Nilai kuat tekan tertinggi memasuki persyaratan mutu SNI 03-0691-1996 pada kelas D yang bisa diaplikasikan untuk taman kota.Kata Kunci: geopolimer, IPAM, XRF, aktivator, binder

scholarly journals Effect of nanosilica on the mechanical and microstructural properties of a normal strength concrete produced in Nigeria

2020 ◽  
Vol 39 (3) ◽  
pp. 710-720
Author(s):  
I.M. Adamu ◽  
J.M. Kaura ◽  
A. Lawan ◽  
A. Ocholi
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Strength Test ◽  
Supplementary Cementitious Materials ◽  
Hydration Reaction ◽  
Optimal Dosage ◽  
Microstructural Properties ◽  
Conventional Concrete ◽  
Compressive Strength Test ◽  
Normal Strength

The failure of conventional concrete to have classical mechanical properties, reduced permeability and lead to sustainability in concrete production called for the use of supplementary Cementitious Materials (SCM) in concrete to improve its performance. This study investigates the effect of adding optimal dosage of an SCM called nanosilica (nS) on the tensile and compressive strengths, microstructural properties and cement hydration reaction for grade 30 concrete. The optimal dosage of the nS was determined to be 1.5% by weight of cement using compressive strength test. The influence of optimal nS dosage on the concrete properties was investigated using compressive strength test, splitting tensile strength test, Scanning Electron Microscopy (SEM) and Energy Dispersion Spectroscopy (EDS). Results revealed that optimal nS addition led to 30% and 23.3% respective increase in compressive and tensile strengths of conventional concrete at 7days of curing. SEM micrographs show better packing density in the nano-concrete at 90days of curing. EDS shows that addition of optimal nS dosage in concrete led to formation of more C-S-H gels at 90days curing period, and a corresponding reduction in Ca/Si ratio of the nano-concrete to 0.89; a ratio that is very close to that of 14Ǻ tobermorite reported in literature. The optimal nano-concrete can be used where strength improvement, especially at early age and reduction in concrete permeability are requirements. Keywords: Compressive strength, Tensile strength, Normal strength nano-concrete, SEM, EDS.

scholarly journals An In-Situ Study on The Specimen Size Effects on Compressive Strength for Different Strength Concretes

2021 ◽  
Vol 1 (3) ◽  
pp. 7-10
Author(s):  
İlker TEKİN
Keyword(s):  
Compressive Strength ◽  
Size Effects ◽  
Strength Test ◽  
Specimen Size ◽  
Compression Tests ◽  
Fresh Properties ◽  
In Situ Study ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete

The compressive strength of concrete is the most basic and considerable material property while reinforced concrete structures are designed. It has become a problem to use this value, however, because the control specimen sizes and shapes from country to country may be dissimilar. The study presents the results of an experiment that examined the effect of specimen size on the different classes of compressive strengths of concrete. The study included casting specimens, cubes, and six different classes of the concrete mixture. Compression tests were conducted at the age of 3, 7, and 28 days on 150 mm & 100 mm cube samples. The fresh properties of concrete were measured by slump and unit weights tests. Moreover, the specimen size of concrete has an important role both on the compressive strength and capacity of a curing cabinet. Correlations between compressive strengths and sizes of specimens are compatible for classes of structural concretes. Therefore, it can be used in curing cabinet varying sizes of concretes like 150 mm & 100 mm cube samples. Although almost 220 concrete specimens sized of 150 mm cube can be poured in curing tank, roughly 585 concrete specimens can be poured with using 100 mm cube concrete specimens. The most convenient size resulted from this study is suggested as 100 mm sized cubic specimen that it promote to change the law for concrete both curing and compressive strength test.

Assessment of Rice Husk Ash (RHA) and Calcium Chloride (CaCl2) on Compressive Strength of Concrete Grade 20

2018 ◽  
Vol 40 ◽  
pp. 22-29
Author(s):  
Joseph A. Ige ◽  
Mukaila A. Anifowose ◽  
Samson O. Odeyemi ◽  
Suleiman A. Adebara ◽  
Mufutau O. Oyeleke
Keyword(s):  
Compressive Strength ◽  
Calcium Chloride ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Conventional Concrete ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete ◽  
Strength Result

This research assessed the effect of Nigerian rice husk ash (RHA) and calcium chloride (CaCl2) as partial replacement of cement in concrete grade 20. Rice husk ash (RHA) is obtained by combustion of rice husk in a controlled temperature. The replacement of OPC with rice husk ash (RHA) were 0%, 5%, 10%, 15% and 20%. 1% of Calcium Chloride was blended with OPC/RHA in all the test specimens except from control mix. Concrete cubes of sizes 150mm x 150mm x 150mm were cast and cured in water for 7, 14 and 28 days respectively. Slump test was conducted on fresh concrete while density test and compressive strength test were conducted on hardened concrete. The slump results revealed that the concrete becomes less workable (stiff) as percentage increases. The compressive strength result at 28 days revealed that 5%RHA/1%CaCl2 have the highest strength of 26.82N/mm2 while 20%RHA/1%CaCl2 have the lowest strength (21.48N/mm2). Integration of 5%RHA/1%CaCl2 and 10%RHA/1%CaCl2 as cement replacement will produce a concrete of higher compressive strength compared to conventional concrete in grade 20 concrete.

A Study on Relationship between Porosity and Compressive Strength for Geopolymer Paste

2013 ◽  
Vol 594-595 ◽  
pp. 1112-1116 ◽  
Author(s):  
Z.F. Farhana ◽  
H. Kamarudin ◽  
Azmi Rahmat ◽  
A.M. Mustafa Al Bakri
Keyword(s):  
Compressive Strength ◽  
Sodium Hydroxide Solution ◽  
Sodium Silicate Solution ◽  
Silicate Solution ◽  
Pulse Velocity ◽  
Strength Test ◽  
Compressive Strength Test ◽  
Alkaline Activator ◽  
The Relationship ◽  
Geopolymer Paste

This paper presents a study on the relationship between porosity and compressive strength for geopolymer paste. In this research, geopolymer paste was made from fly ash class F based geopolymer mixed with alkaline activator; sodium hydroxide solution and sodium silicate solution. Twelve mixes were cast in 50mm x 50mm x 50mm moulds and the samples were cured for 24 hrs at 60 °C in the oven. The samples were examined after 7, 14, 28 and 90 days in terms of porosity test, pulse velocity test and compressive strength test. It was concluded that the sample at day 90 had the highest compressive strength of 56.50 N/mm2had porosity 3.77%. Thus, the sample with lowest porosity had highest pulse velocity 3303 m/s during ultrasonic testing with lowest transmission time 15.17 μs. Keywords: porosity, compression strength, geopolymer, pulse velocity

scholarly journals Pengaruh Penambahan Superplasticizer Dan Abu Batu Sebagai Filler Untuk Meningkatkan Kuat Tekan Beton Normal

2018 ◽  
Vol 13 (1) ◽  
pp. 10-17
Author(s):  
Chairani Sabrina Mecha ◽  
Tri Mulyono ◽  
Prihantono Prihantono
Keyword(s):  
Compressive Strength ◽  
Strength Test ◽  
Total Weight ◽  
Concrete Compressive Strength ◽  
Cement Concrete ◽  
Compressive Strength Test ◽  
Maximum Compressive Strength

The purpose of this research is to determine the Superplasticizer Sikament LN as a added of cement in compressive strength test in an effort to determine the maximum compressive strength of the concrete. This research was partially adding cement with Superplasticizer with a variety of percentages 0%, 0,5%, 1%, 1,5%, and 2% of the total weight of cement. Concrete design f’c 35 MPa, W/C 0.4, 12±2 cm slump, amount of sample was 30 (3 samples for each variation for concrete life of 7 and 28 days). The results showed that 0,5% variation of Superplasticizer reached the average concrete compressive strength is 43,5 MPa; 1% variation of Superplasticizer is 42,56 MPa; 1,5% variation of Superplasticizer is 40,86 MPa and 2% variation of Superplasticizer is 40,2 MPa. The maximum concrete compressive strength contained 0,5% variation of Superplasticizer.

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