scholarly journals SIFAT KIMIA DAN FISIK BAHAN UTAMA CONBLOCK RINGAN YANG MENGGUNAKAN AGREGAT SEKAM PADI

PERENNIAL ◽  
2012 ◽  
Vol 8 (2) ◽  
pp. 62
Author(s):  
. Bakri
Keyword(s):  
Portland Cement ◽  
Key Words ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Analysis Procedure ◽  
Reactive Substance ◽  
Composite Cement ◽  
Chemical Content ◽  
Husk Rice

This research aimed to assess the properties of main substances used to produce lightweight composite cement using rice husk as aggregate. Main substances used in this research consisted of Portland cement tipe I, lime, rice husk and rice husk ash. Portland cement tipe I, lime and rice husk obtained from local producers in Makassar, while rice husk ash obtained by burning rice husk conventionally in kiln drum and subsequently followed by burning in furnace of 1400 Barnsted Thermolyne Type at temperature 600 oC for 2 hours. Chemical Content of the substances analyzed by adopted the analysis procedure in SNI 15-2049-2004. Alkalinity of Portland cement tipe I, silica of rice husk ash and Na2O dan K2O was categorized as low, while rice husk was categorized as reactive substance. Key words: Portland cement tipe I, rick husk, rice husk ash, lime, lightweight composite cement

scholarly journals ABSORPSI AIR KOMPOSIT SEMEN SEKAM PADI DENGAN PENAMBAHAN POZZOLAN ABU SEKAM PADI DAN KAPUR PADA MATRIKS SEMEN

PERENNIAL ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 70 ◽  
Author(s):  
. Bakri ◽  
. Baharuddin
Keyword(s):  
Water Absorption ◽  
Key Words ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Cement Composite ◽  
Pozzolanic Material ◽  
Husk Rice ◽  
Reduced Water

This research aimed to determine the role of rice husk ash as pozzolanic material in reducing water absorption of rice husk cement composite. Rice husk ash obtained by burning rice husk conventionally in kiln drum. Preparation of water absorption testing samples was conducted according to ASTM C 140, while ASTM C 90 used to evaluate the desired water absorption. Rice husk ash as of 40 % significantly reduced water absorption of the composite, but only rice husk ash of 20 % dan 30 % fulfilled the ASTM C 90 requirement. Addition of lime in the mixture increased the water absorption. Key words: pozzolamic, water absorption, rick husk, rice husk ash.

scholarly journals PERANAN ABU SEKAM PADI UNTUK MENGURANGI POROSITAS CONBLOCK RINGAN SEKAM PADI

PERENNIAL ◽  
2012 ◽  
Vol 8 (1) ◽  
pp. 6
Author(s):  
. Bakri
Keyword(s):  
Key Words ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Test Preparation ◽  
Pozzolanic Material ◽  
Sample Test ◽  
Lower Porosity ◽  
Husk Rice ◽  
All Treatment

This research aimed to determine the role of rice husk ash as pozzolanic material in reducing porosity of lightweight rice husk-conblock. Rice husk ash was obtained by burning rice husk conventionally in kiln drum and subsequently followed by burning in furnace of 1400 Barnsted Thermolyne Type at temperature 600 oC for 2 hours. Sample test preparation and procedure of porosity was adopted from ASTM C 140. Rice husk ash significantly reduced the porosity at all treatment combinations of rice husk ash percentage, but the lower porosity (31 %) obtained by using rice husk ash of 20 %. Key words: rick husk, rice husk ash, lightweight conblock, porosity

scholarly journals Manurial amendments and source of water for supplemental irrigation of sawah-rice system influenced soil quality and rice yield

Agro-Science ◽  
2021 ◽  
Vol 20 (1) ◽  
pp. 95-102
Author(s):  
A.L. Nnadi ◽  
V.U. Ugwu ◽  
J.C. Nwite ◽  
S.E. Obalum ◽  
C.A. Igwe ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Spring Water ◽  
Mineral Fertilizers ◽  
Small Scale ◽  
Rice Grain ◽  
Southeastern Nigeria ◽  
Supplemental Irrigation ◽  
Husk Rice ◽  
Poultry Droppings

Soil and water management research on adapting the promising sawah ecotechnology for lowland rice farming in West Africa has largely focused on the abundant inland valleys; floodplains which too represent a huge agricultural resource in the region have not been so involved. Sawah refers to a bunded, puddled and leveled basin for rice, with water inlets and outlets for irrigation and drainage, respectively. In conventional sawah, soil fertility is augmented using mineral fertilizers, with an option to harness lowland water resources for use in small-scale irrigation to create the so-called sawah typologies. In this study, we evaluated the effects of three manurial amendments (rice husk, rice-husk ash and poultry droppings, each at 10 t ha–1) and NPK 20:10:10 at 400 kg ha–1 interacting with source of water (spring or pond) used for supplemental irrigation of three sawah typologies in a floodplain in southeastern Nigeria. Plots amended with poultry droppings and supplemented with spring water recorded the overall best performance of the sawah-rice system; the control being the unamended non-supplemented (solely rainfed) plots recorded the worst. Rice-husk ash and rice husk enhanced soil pH and soil organic carbon, respectively. The three sawah typologies showed a consistent trend thus spring-supplemented ≥ pond-supplemented ≥ non-supplemented sawah. Rice grain yield was influenced by soil total nitrogen and the sum of the three plant-nutrient basic cations (K+ , Ca2+ and Mg2+), with the influence of K+ alone being the greatest. To enhance rice performance including grain yields in floodplain sawah, farmers should utilise poultry droppings as soil manure and spring water for supplemental irrigation.

The Potential of Black Rice Husk Ash (BRHA) in Brick Productions

2020 ◽  
Vol 995 ◽  
pp. 155-160
Author(s):  
Nurol Huda Dahalan ◽  
M.H. Abdul Mutalib ◽  
Hooi Min Yee ◽  
Mohd Haris Ridzuan Ooi ◽  
Haslinda Abdul Hamid
Keyword(s):  
Portland Cement ◽  
Rice Husk ◽  
Ordinary Portland Cement ◽  
Rice Husk Ash ◽  
Construction Materials ◽  
Black Rice ◽  
High Demand ◽  
Earth Construction ◽  
Optimal Replacement ◽  
Depth Study

A lot of researchers have studied the rice husk brick and it is the most widely used material in earth construction. Although study has been carried out on rice husk brick previously, more in-depth study on the aspect of the optimal replacement levels of local black rice husk ash to the Ordinary Portland Cement (OPC) that will meet stated standard requirements for non load-bearing bricks need has not been carried out. Despite all the natural materials have been used in construction materials, black rice husk ash is important to be reviewed based on the rationale of availability and growing rice husk production year by year due to high demand of rice supply.

Experimental study on concrete with rice husk ash under sulphuric ACID solutions

2018 ◽  
Vol 7 (4.5) ◽  
pp. 522
Author(s):  
R. Ramya Swetha ◽  
Dr. G.Venkata Ramana ◽  
K. Anusha Hadassa
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Portland Cement ◽  
Sulphuric Acid ◽  
Rice Husk ◽  
Industrial Waste ◽  
Ordinary Portland Cement ◽  
Rice Husk Ash ◽  
Acid Solutions ◽  
Iron And Calcium

This investigation shows the results on aggressive sulphuric acid on the concrete combined with rice husk ash (RH) when partially replaced for ordinary Portland cement. The husk ash, which mainly contains aluminum ion, silica, iron and calcium oxides, is an industrial waste and poses disposal problems. In this study, the effect of various concentrations (1%, 3%, 5%) of sulphuric acid (H2SO4) on Concrete replaced with various percentages (0%,5%,10%,15% and 20% by weight of cement) of RH is evaluated in-terms of residual compressive strength. The loss of compressive strengths of concrete immersed in various H2SO4 solutions for 7 days 28 days and 60 days indicates that at upto 10% replacement increase in strength was observed after which strengths were decreasing. This increase in strength is attributed to pozzolanic activity of RH.  

Mechanical Strength of Lime-Rice Husk Ash Mortars: A Preliminary Study

2012 ◽  
Vol 517 ◽  
pp. 495-499 ◽  
Author(s):  
R. Méndez ◽  
M.V. Borrachero ◽  
J. Payá ◽  
J.M. Monzó
Keyword(s):  
Portland Cement ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Curing Temperature ◽  
Curing Time ◽  
Short Term ◽  
Similar Tendency ◽  
Pozzolanic Material ◽  
Binder Composition ◽  
Preliminary Study

Rice is produced in many countries in the world, and this product permits to feed a lot of people, most of them in developing countries. Approximately one tone of rice produces 200 Kg of rice husk, and when this rice husk is burnt 20% of rice husk ash (RHA) is obtained. A very important part of rice husk is abandoned in the field producing environmental problems. RHA can be obtained by controlled combustion, when this fact occurs, a good quality RHA is produced. This RHA can be used as a pozzolanic material in mixtures with lime or Portland cement, producing good mechanical properties and durability. In this work a preliminary results about the influence of RHA/lime ratio on workability and mortars strength was studied. The results showed that mortars workability improves when RHA/lime ratio do. Compressive strength (Cs) of mortars with different RHA/lime ratios was studied, in this sense, for 28 days curing time at 20°C an increase of Cs when RHA/lime ratio do is observed. However for 90 and 180 days curing time a maximum or Cs for RHA/lime equal to 2 is obtained. The lowest and highest Cs values obtained were 6 and 18 MPa respectively, when 20°C curing temperature was used. When curing temperature increases until 65°C similar tendency of Cs respecting RHA/lime ratio was observed. A preliminary study of binders for using in mortars tiles reveals that at least low quantities of Portland cement must be included in binder composition in order to obtain short term strengths that make easy tile demoulding process.

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