scholarly journals The Influence of Rice Husk on the Physical Properties of Portland Pozzoland Cement at the Cement Industry Scale

2019 ◽  
Vol 258 ◽  
pp. 01005
Author(s):  
Agus Maryoto ◽  
Gathot Heri Sudibyo
Keyword(s):  
Physical Properties ◽  
Rice Husk ◽  
Setting Time ◽  
Cement Industry ◽  
Good Effect ◽  
Type I ◽  
Test Results ◽  
Rice Husks ◽  
False Set ◽  
Cement Setting

This study aims to determine the effect of rice husk as a source of substitute fuel on the manufacture of cement at the industry scale. The parameters tested include the physical properties of the cement consisting of the Blain fineness test, false set, cement setting time, and mortar compressive strength at 3, 7, and 28 days. The average values for the results of these tests on cement produced using rice husks as a substitute fuel were 380 m2/kg, 81%, 132 minutes, 253 minutes, and 225, 298, and 379 kg/cm2, respectively. Based on the test results, we have shown that rice husk ash has a good effect on the characteristics of cement type I which still meet the standards of SNI-2049-2015.

scholarly journals Mechanical and Durability Properties of Aerated Concrete Incorporating Rice Husk Ash (RHA) as Partial Replacement of Cement

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 604
Author(s):  
Tariq Ali ◽  
Abdullah Saand ◽  
Daddan Khan Bangwar ◽  
Abdul Salam Buller ◽  
Zaheer Ahmed
Keyword(s):  
Aluminum Powder ◽  
Rice Husk ◽  
Industrial Ecology ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Type I ◽  
Fine Aggregate ◽  
Test Results ◽  
Durability Properties ◽  
Aerated Concrete

In today’s world, the implementation of industrial ecology for sustainable industrial development is a common practice in the field of engineering. This practice promotes the recycling of by-product wastes. One of those by-product wastes is rice husk ash. This paper describes an investigation into the effect of rice husk ash (RHA) as a partial replacement for cement, to produce lightweight, aerated concrete. Type I Portland cement, fine aggregate, and aluminum powder as an aerating agent were used in this study. The RHA was used in different replacement levels, i.e., RHA was used to replace cement at 0%, 2.5%, 5%, 7.5%, 10%, 12.5% and 15% by weight. Aluminum powder was added during mixing at 0.5% by weight of binder to obtain lightweight, aerated concrete. Test results are presented in terms of physical, mechanical, and durability aspects that include density, compressive strength, split tensile strength, and flexural strength of concrete cured at different curing regimes, i.e., 3, 7, 28, and 90 days along with corrosion analysis, and sulphate attack at 28 days of curing. The test results show that using 10% RHA as a partial replacement of cement in aerated concrete is beneficial in triggering the strength and durability properties of concrete.

scholarly journals Evaluation of Physical Properties of Mycelium-Based Bio Composites for Use As Facade Insulation Material

2021 ◽  
Author(s):  
Frank Dehn ◽  
Engin Kotan
Keyword(s):  
Physical Properties ◽  
Thermal Insulation ◽  
Beech Wood ◽  
Fungal Mycelium ◽  
Insulation Material ◽  
Test Results ◽  
Construction Sector ◽  
Rice Husks ◽  
Insulation Materials ◽  
Base Substrate

Abstract Background: To evaluate the usability of mycelium-based materials for construction, first tests were carried out to determine their suitability for thermal insulation. Different substrate compositions were tested for various physical properties. The compositions and experimental setups used are described in the “Methods” section. Results: Materials based on fungal mycelium were found to have promising properties for use in the construction sector. Their thermal conductivities are comparable to those of commercially available ecological insulation materials. As material properties turned out to be dependent on the substrate used for the production of mycelium materials, further optimisation is required. Conclusion: For first preliminary tests [1] to study the performance of mycelium-based materials, different additives (beech wood, rice husks, coffee silver skin, perlite rock) were added to a base substrate to determine their influence on physical properties. Compared to the characteristics of conventional thermal insulation materials, the test results obtained are rather promising and confirm suitability of mycelium-based materials for building. However, further systematic studies are needed to investigate options to improve major properties and to ensure reproducibility of mycelium materials with largely homogeneous properties.

Karakteristik Kimia - Fisika Tanah Bekas Tambang Semen Yang Ditambah Sekam Padi atau Serbuk Gergaji dan Pertumbuhan Wodyetia bifurcata A.K. Irvine

2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Slamet Santosa ◽  
Muhamad Ruslan Umar ◽  
Meirini R. Bakri
Keyword(s):  
Bulk Density ◽  
Growth Medium ◽  
Rice Husk ◽  
Seed Quality ◽  
Cement Industry ◽  
Available P ◽  
Rice Husks ◽  
Total N ◽  
Organic C ◽  
Number Of Leaves

The cement industry only takes the top clay and the next layer of soil is left unused. This study was aimed to analyze some of the chemical and physical properties of the ex-mining land of cement which added with rice husks or sawdust and the growth of Wodyetia bifurcata seedlings. A growth medium is made from ex-mining land of cement by the addition of rice husk or sawdust with a different amount of material percentage. All the growth medium contains organic C ranges of 0.56-3.09%, total N ranges of 0.09-0.33%, available P ranges of 8.42-31.16mg/100g, available K ranges of 6.54-16.32mg/100g, and bulk density ranging of 0.24-1.09gcm-3. The seedling height growth of Wodyetia bifurcate about 13.5 - 15.2 cm, the range of stem diameter is 0,71-0,86 cm, the root length about20.2-29.8 cm, the number of leaves is 2.2-2.8, as well as seed quality index ranging of 0.09-0.13. The addition of 50% rice husk (B2) produced organic C, total N, available P and K and bulk density of the ex-mining land of cement and provides the highest growth of Wodyetia bifurcata A.K. Irvine seedlings.

scholarly journals PENGARUH PENAMBAHAN SEKAM PADI DAN POLIMER EMULSI POLY VINYL ACECATE CO ACRYLIC PADA TANAH LEMPUNG DENGAN OBJEK PENGUJIAN KEKUATAN BATU BATA MENGGUNAKAN METODE UNIAXIAL

2019 ◽  
Vol 9 (1) ◽  
pp. 39-46
Author(s):  
Halauddin Halauddin
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Strength Test ◽  
Polymer Mixture ◽  
Test Results ◽  
Rice Husks ◽  
Polymer Emulsion ◽  
Emulsion Polymer ◽  
Compressive Strength Test ◽  
Uniaxial Compressive Strength Test

Research on the effect of the addition of rice husk and poly vinyl acetate emulsion polymer co acrylic (PVA) on clay have been conducted to see the strength of brick. Calculation of strength compared to brick by rice husks and polymer emulsion and given rice husk without any emulsion polymer. Provision of rice husk to batter was fixed at 9:1, while the provision of PVA polymer mixture for each batter with varying percentage are 1%-7%. Based on the results of the research, showed that: uniaxial compressive strength test resultsbricks to mix rice husk without PVA emulsion polymer was 28,7kg/cm2(L0), compressive strength test results bricks to mix rice husk with PVA emulsion polymer to a mixture of 1%-7%, respectively: (PVA 1% of 28,7 kg/cm2 (L1);(PVA 2% of 28,7 kg/cm2 (L2); (PVA 3% of 28,7 kg/cm2 (L3); (PVA 4% of 28,7 kg/cm2 (L4); (PVA 5% of 28,7 kg/cm2  (L5); (PVA 6% of 28,7 kg/cm2 (L6); and (PVA 7% of 28,7 kg/cm2 (L7). From the above results show that the compressive strength test results bricks to mix rice husk with PVA emulsion polymer mix increased from 1% to 3% mix, while starting from a mixture of 4% to 7% of the compressive strength of bricks dropped dramatically. The addition of PVA 3% of additions that the most effective way to improve the compressive strength of the bricks with compressive strength reached 53,5 kg/cm2, or increase of 46,4% from a brick with a mixture ofrice husk.

Synthesis and Characterization of Biosilica from Rice Husks as a Catalyst for the Production of Biodiesel

2021 ◽  
pp. 38-43
Author(s):  
Herman Hindarso ◽  
Indah Epriliati ◽  
Dede Hoerudin ◽  
Sri Yuliani
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Oxide Content ◽  
Test Results ◽  
Rice Husks ◽  
Calcination Process ◽  
Xrf Scanning ◽  
Naoh Solution ◽  
Material Preparation

The synthesis of silica particles from rice husk is a research based on natural materials and is classified as green material. Preparation of biosilica catalyst from calcined rice husk ash was carried out by the hydrothermal method using rice husk ash mixed with NaOH solution at a ratio of 1:5 (w/v) with the reaction temperature of 110-120°C, the pressure of 0.15-0.2 MPa for 15-30 minutes. Biosilica results are then continued with the calcination process at a temperature of 200-500°C for one hour. Biosilica with calcination is then compared to biosilica without calcination. These two kinds of biosilica are then characterized to determine their performance. The biosilica characteristic test that was carried out included X-Ray Fluorescence (XRF), Scanning Electron Microscopy(SEM), and Brunauer-Emmett-Teller (BET). The XRF test results show that biosilica with calcination process has higher silica and silica oxide content than that without calcination. The surface morphology of biosilica with calcination and without calcination gives an uneven surface and consists of lumps and with uneven distribution on the surface of the biosilica sample. Biosilica with calcination process has a larger surface area, pore volume, and radius than biosilica without calcination process.

Effect of Metakaolin on the Physical Properties and Setting Time of High Performance Concrete

2013 ◽  
Vol 539 ◽  
pp. 195-199
Author(s):  
Bao Min Wang ◽  
Hai Nan Ma ◽  
Ming Li ◽  
Yu Han
Keyword(s):  
Physical Properties ◽  
Constant Temperature ◽  
Cement Paste ◽  
High Performance ◽  
High Performance Concrete ◽  
Setting Time ◽  
Cementitious Material ◽  
Test Results ◽  
Slump Flow ◽  
Static Flow

Abstract. Kaolin native to Jilin Province was calcined at the constant temperature of 750°C for 4 hours to obtain the high pozzolanic metakaolin(Al2Si2O7). The effects of metakaolin (MK) on the static flow expansion of cement paste and the workability and setting time of concrete were studied with the content of 0, 5%, 10% and 15% by weight of cementitious material. The test results show that: when the dosage of superplasticizer is 2% by weight of cementitious material, the setting time of concrete shortens obviously and the slump and expansion decrease with the raising of MK content. When 5% of cement is replaced by MK, the setting time of concrete shortens by 5%; the slump and the slump flow decrease by 5.5% and 4.4% respectively.

scholarly journals Karakterisasi Sifat Fisis dan Mikrostruktur Papan Gipsum dengan Variasi Komposisi Lateks

2021 ◽  
Vol 5 (2) ◽  
pp. 116-120
Author(s):  
Ety Jumiati ◽  
Keyword(s):  
Physical Properties ◽  
Rice Husk ◽  
Coconut Shell ◽  
Waste Materials ◽  
Inhomogeneous Distribution ◽  
Rice Husks ◽  
Sample Analysis ◽  
Particle Agglomeration ◽  
Gypsum Board ◽  
Coconut Shells

Gypsum board is one of the advanced products of gypsum material with a mixture of fiber/fiber or other materials. Gypsum board has a weakness in its physical properties that easily absorb water. Therefore, there is a need for innovation in the manufacture of gypsum boards that will produce even better quality. The manufacture of gypsum board can utilize waste materials such as coconut shells and rice husks and latex as adhesives. The mixture of gypsum board materials including: gypsum, coconut shell, and rice husk used was 70%, 15%, 15% with latex variation 10%, 12%, 14%, 16%, 18% with FAS 0.5 and drying for 28 days. The parameters of the physical properties test include: density and thickness expansion, as well as microstructural testing to determine the morphology of the gypsum board sample. Analysis of the physical properties of gypsum board obtained optimal results, namely in sample A with a variation of 10% latex composition, the density value was 1.35 g/cm3, and the thickness expansion was 5.03% which met the SNI Standard 01-4449-2006. While the microstructure produces morphological images that show inhomogeneous distribution, particle agglomeration forms, and impurities

scholarly journals The Effect of Using Linear Low Density Polyethylene (LLDPE) Powder and Rice Husk Asn on Compressive Strength and Intital Setting Time of Alkaline-Activated Mortar

2021 ◽  
Vol 921 (1) ◽  
pp. 012070
Author(s):  
M Sofyan ◽  
A O Irlan ◽  
A Rokhman ◽  
D D Purnama ◽  
R R R Utami
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Setting Time ◽  
Strength Test ◽  
Curing Temperature ◽  
Test Results ◽  
The Core ◽  
Compressive Strength Test

Abstract Fly Ash, Rice Husk Ash and Linear Low Density Polyethylene (LLDPE) Plastic Waste also contribute to environmental problems. Starting from the problem of CO2 emissions to ecosystem damage due to the accumulation of waste on the earth’s surface. Therefore, this study focuses on the use of Fly Ash, Rice husk ash and LLDPE Powder as a mixture of Alkaline-Activated Mortar. In this study, Fly Ash as a Pozzolanic Material mixed with Alkaline Activator Solution serves as a binder for Mortar. Rice husk ash is used as a substitute material for Fly ash while LLDPE powder functions as a substitute material for sand. The percentage of LLDPE powder used in the mortar mixture is from 0 to 15% of the total weight of the mixture. While the percentage of rice husk ash used in the mixture is 7%, Alkali Activator Solution 27% and Sand ranging from 24.5 to 39.5%. There are six variations of the mortar specimen (AAMP1, AAMP2, AAMP3, AAMP4, AAMP5, AAMP6). Initial setting time testing is done on binder mortar. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes.

scholarly journals Physico-Chemical Investigation of Endodontic Sealers Exposed to Simulated Intracanal Heat Application: Hydraulic Calcium Silicate-Based Sealers

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 728
Author(s):  
David Donnermeyer ◽  
Magdalena Ibing ◽  
Sebastian Bürklein ◽  
Iris Weber ◽  
Maximilian P. Reitze ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Thermal Treatment ◽  
Film Thickness ◽  
Physical Properties ◽  
Calcium Silicate ◽  
Setting Time ◽  
Chemical Properties ◽  
Chemical Changes ◽  
Time Flow ◽  
Heat Application

The aim of this study was to gain information about the effect of thermal treatment of calcium silicate-based sealers. BioRoot RCS (BR), Total Fill BC Sealer (TFBC), and Total Fill BC Sealer HiFlow (TFHF) were exposed to thermal treatment at 37 °C, 47 °C, 57 °C, 67 °C, 77 °C, 87 °C and 97 °C for 30 s. Heat treatment at 97 °C was performed for 60 and 180 s to simulate inappropriate application of warm obturation techniques. Thereafter, specimens were cooled to 37 °C and physical properties (setting time/flow/film thickness according to ISO 6876) were evaluated. Chemical properties (Fourier-transform infrared spectroscopy) were assessed after incubation of the specimens in an incubator at 37 °C and 100% humidity for 8 weeks. Statistical analysis of physical properties was performed using the Kruskal-Wallis-Test (P = 0.05). The setting time, flow, and film thickness of TFBC and TFHF were not relevantly influenced by thermal treatment. Setting time of BR decreased slightly when temperature of heat application increased from 37 °C to 77 °C (P < 0.05). Further heat treatment of BR above 77 °C led to an immediate setting. FT-IR spectroscopy did not reveal any chemical changes for either sealers. Thermal treatment did not lead to any substantial chemical changes at all temperature levels, while physical properties of BR were compromised by heating. TFBC and TFHF can be considered suitable for warm obturation techniques.

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