Effect of sorghum husk ash and calcium chloride on compressive strength of grade 20 concrete

Fisika adalah suatu ilmu yang mempelajari tentang alam semesta, baik mempelajari partikel yang berukuran kecil sampai dengan planet yang berukuran makro. Bidang kajiannyapun beragam dari mempelajari struktur bumi sampai dengan sistem tata surya. Salah satu penerapan ilmu fisika adalah di bidang industri perminyakan. Perkembangan teknologi perminyakan dewasa ini sangat pesat sekali, salah satunya adalah dalam pengeboran atau drilling. Operasi pemboran tidak pernah lepas atau mengabaikan penggunaan fluida pemboran. Fluida pemboran terdiri dari dua pekerjaan yakni rekayasa lumpur pemboran dan penyemenan.Penyemenan diperlukan supaya dapat mengurangi permasalahan sewaktu melakukan pemboran pada trayek selanjutnya. Tingkat keberhasilan penyemenan ditentukan oleh 2 hal yakni kualitas bahan penyemenan yang terdiri dari bahan dasar semen serta aditif dan teknik pelaksanaan penyemenan. Pada penambahan Sodium Lignosulfonate terjadi penurunan nilai compressive strength dan menaikan nilai thickening time pada konsentrasi 1% adalah 255 menit dengan temperatur 80°F karena pada dasarnya additive ini bersifat retarder. Pengujian additive Calcium Chloride untuk nilai compressive strength sangat efektif pada konsentrasi 7% dengan hasil test 4483 psi pada temperatur 150°F, sedangkan pada temperatur 80°F dan 100°F hasil test yang didapat sebesar 2393 psi dan 2888 psi, sedangkan nilai thickening time menurun dikarenakan sifat additive ini sebagai accelerator.

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

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.40.22 ◽

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.

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THE EFFECT OF USING CALCIUM CHLORIDE IN G CLASS CEMENT ON STARTING TIME AND CEMENT PRESSURE

PETRO ◽

10.25105/petro.v8i3.5509 ◽

2019 ◽

Vol 8 (3) ◽

Author(s):

Cahaya Rosyidan

Keyword(s):

Compressive Strength ◽

Calcium Chloride ◽

Drilling Fluid ◽

Surface Zone ◽

Cement Sample ◽

Drilling Operations ◽

The Right ◽

Different Characteristics ◽

Production Zone ◽

Test Result

Drilling operations always require fluid in their activities. Because to penetrate the soil and rocks will be very easy with the use of fluid. The fluid will help soften the soil and rocks making it easier for the drill bit to penetrate it. Drilling fluid is also needed to attach the casing to the drill wall. So that the wall does not collapse, as media logging and so on. Of course, each drilling zone (surface zone, intermediate zone, and production zone) has different characteristics and different additive substances are needed. This study wants to find out the function of the use of calcium chloride additives on the nature of cement hardness and choking time. This research is important because it will be known this addictive nature as a retarder or accelerator. By knowing the nature of this additive so that it can be used in the right zone. Testing on Calcium Chloride additive for the value of compressive strength is very effective at a concentration of 8%, 24-hour immersion time and a temperature of 150 ° F with a test result of 4483 psi. Whereas, at temperatures of 80 ° F and 100 ° F, the maximum value of compressive strength for Calcium Chloride additive occurs at a concentration of 10% with a test result of 2393 psi and 2888 psi. Based on the data presented, temperature plays an important role in testing the thickening time of a cement sample. The addition of calcium chloride additive functions as an accelerator.

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Reducing the Waiting-On-Cement Time of Geopolymer Well Cement using Calcium Chloride (CaCl2) as the Accelerator: Analysis of the Compressive Strength and Acoustic Impedance for Well Logging

Sustainability ◽

10.3390/su13116128 ◽

2021 ◽

Vol 13 (11) ◽

pp. 6128

Author(s):

Nurul Nazmin Zulkarnain ◽

Syed Ahmad Farhan ◽

Yon Azwa Sazali ◽

Nasir Shafiq ◽

Siti Humairah Abd Rahman ◽

...

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Calcium Chloride ◽

Acoustic Impedance ◽

Calcium Content ◽

Cost Effective ◽

Acid Attack ◽

Curing Conditions ◽

Class F Fly Ash ◽

Well Cement

Geopolymer cement (GPC) is an aluminosilicate-based binder that is cost-effective and eco-friendly, with high compressive strength and resistance to acid attack. It can prevent degradation when exposed to carbon dioxide by virtue of the low calcium content of the aluminosilicate source. The effect of the concentration of calcium chloride (CaCl2) as the accelerator on the compressive strength and acoustic impedance of GPC for well cement, while exposed to high pressure and high temperatures, is presented. Fly ash from the Tanjung Bin power plant, which is categorized as Class F fly ash according to ASTM C618-19, was selected as the aluminosilicate source for the GPC samples. Sodium hydroxide and sodium silicate were employed to activate the geopolymerization reaction of the aluminosilicate. Five samples with a density of 15 ppg were prepared with concentrations of CaCl2 that varied from 1% to 4% by weight of cement. Findings revealed that the addition of 1% CaCl2 is the optimum concentration for the curing conditions of 100 °C and 3000 psi for 48 h, which resulted in the highest compressive strength of the product. Results also indicate that GPC samples that contain CaCl2 have a smaller range of acoustic impedance compared to that of ordinary Portland cement.

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Strength Characteristics of Glass Fiber Reinforced Concrete (GFRC) using Calcium Chloride Integral Curing Method

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b1392.0982s1119 ◽

2019 ◽

Vol 8 (2S11) ◽

pp. 3040-3044

Keyword(s):

Compressive Strength ◽

Glass Fiber ◽

Calcium Chloride ◽

Glass Fibers ◽

Concrete Surface ◽

Fiber Reinforced Concrete ◽

Cold Weather ◽

Test Results ◽

Glass Fiber Reinforced ◽

Curing Method

Concrete is weak in tension and strong in compression. The inclusions of fibers in concrete significantly improves its compressive as well as tensile strength. The use of different types of fibers have shown positive responses among the researchers. It has long been known that curing concrete during cold weather can result in an inferior product with substandard properties. Curing also takes much longer, adding to job costs and extending the time before the concrete surface can be used. There are many accelerators available in the market, but Calcium Chloride continues to be one of the most preferred one. In this study, Alkali resistant glass fibers (0%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5% and 4%) were used in the concrete M30 mix. The optimum glass fiber percentage that can be added to the concrete is found by comparing both tensile and compressive strength of the GFRC. Trial mixes of normal M30 concrete by adding different percentages of Calcium Chloride (0%, 0.5%, 1%, 1.5%, 2%, and 2.5%) as curing agent is also prepared. The optimum percentage of calcium chloride that can be added to the concrete is found by comparing the compressive strength of the con- crete. The compressive strength of the GFRC using calcium chloride integral cur- ing is found after 7, 14 and 28 days. The test results are then compared with GFRC using normal curing.

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Experimental Study on a GGBFS Activator Using a By-Product Salt

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.1873 ◽

2013 ◽

Vol 671-674 ◽

pp. 1873-1876

Author(s):

Ru Mu ◽

Zhe Bing Liang ◽

Xiang Shang Chen ◽

Xiao Wei Wang

Keyword(s):

Experimental Study ◽

Compressive Strength ◽

Calcium Chloride ◽

Magnesium Chloride ◽

Volume Fraction ◽

High Volume ◽

High Volume Fraction ◽

Test Results ◽

Similar Performance

The activator is very important for the use of high volume fraction slag in cement so that the compressive strength of cement complying with the requirements of codes. A new slag activator, which is from the by-product of magnesium chloride industry, is investigated experimentally. The test results show that the addition of the new activator increases the compressive strength of cement containing 69% slag effectively. Compared to the compressive strength of the reference cement (no activator added), the compressive strength of the cement with the new activator increases about 40%. The new activator has the similar performance as calcium chloride, which is a conventional slag activator. With the new activator, the compressive strength of cement containing 69% slag meets the requirements of standard GB1344-1999.

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

Matériaux & Techniques ◽

10.1051/mattech/2020023 ◽

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.

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Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

Jurnal Intake : Jurnal Penelitian Ilmu Teknik dan Terapan ◽

10.32492/jintake.v9i2.776 ◽

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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A method for measuring the in-plane compressive strength and the compression behavior of coating layers

TAPPI Journal ◽

10.32964/tj10.7.29 ◽

2011 ◽

Vol 10 (7) ◽

pp. 29-34

Author(s):

TEEMU PUHAKKA ◽

ISKO KAJANTO ◽

NINA PYKÄLÄINEN

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Calcium Carbonate ◽

Coating Layer ◽

Test Methods ◽

Coating Films ◽

Precipitated Calcium Carbonate ◽

Coating Color ◽

Mineral Coatings ◽

Styrene Butadiene

Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.

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