scholarly journals Analisa Struktural Batuan Andesit di Desa Laksanamekar Bandung Jawa barat

2019 ◽  
Vol 16 (2) ◽  
pp. 112
Author(s):  
Handoyo Saputro ◽  
Puji Hariati Winingsih
Keyword(s):  
Structural Analysis ◽  
Aluminum Oxide ◽  
Sample Size ◽  
Surface Texture ◽  
Iron Content ◽  
Aluminum Silicate ◽  
Sodium Aluminum Silicate ◽  
Sodium Magnesium ◽  
Iron Manganese

This article discusses structural analysis in Laksanamekar Village, Bandung. The sample is in the form of andesite D and A *. Sample size (1 x 1) cm, with thickness (x) 0.4 cm. Sample D comes from the mountains of Laksanamekar Village Bandung at depths (15-20) m and samples (A *) from the Code River Yogyakarta. The results showed that the sample was a type of dry andesite rock and had layers in the grain. Andesite D has a denser composition, higher iron content and smoother surface texture than A*. The XRD results are known to be phase-identified andesite A * Sodium aluminum Silicate with a composition of 46.5% and andesite D phase of Titanium Calcium Sodium Magnesium Iron Manganese Silicon Aluminum Oxide of 10% so that andesite rocks have higher quality than A * samples.

scholarly journals Characterization of Reclaimed Asphalt Pavement (RAP) as a road pavement material (National Road Waru, Sidoarjo)

2018 ◽  
Vol 181 ◽  
pp. 05001
Author(s):  
Ari Widayanti ◽  
A. A. Soemitro Ria ◽  
Januarti Jaya Ekaputri ◽  
Hitapria Suprayitno
Keyword(s):  
Asphalt Pavement ◽  
Microstructural Analysis ◽  
Aluminum Silicate ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Road Pavement ◽  
Sodium Aluminum Silicate ◽  
Object Of Study ◽  
National Road ◽  
Pavement Material

Reclaimed Asphalt Pavement (RAP) is a dredging pavement material using Cold Milling Machine. The application of Reclaimed Asphalt Pavement is increased year by year. Due to the increasing application of RAP year by year which implicates environment condition, especially in damaging natural resources, the research on material used in RAP needs to be conducted, so RAP can be optimally utilized. To achieve optimal performance, data of RAP characteristics reviewed from microstructural analysis is necessary. The objective of this research is to obtain the characteristics of Reclaimed Asphalt Pavement. The method used was literary study based on previous research. Material tests used were XRF, SEM and FTIR. The object of study was RAP material taken from national road Waru Sidoarjo. The major compositions of Reclaimed Asphalt Pavement obtained were Kaolin, Lithium, Tetraborate, Dextrin. SEM graphics showed the morphological and surface texture of RAP. FTIR graphic presented the functional group of Reclaimed Asphalt Pavement showing O-H C-O acid in the peak of graphic. From XRD result, the major compounds of Reclaimed Asphalt Pavement obtained were Calcium, Sodium, Aluminum, Silicate.

scholarly journals Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO4Solution

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Tao Long ◽  
Qingyuan Wang ◽  
Zhongwei Guan ◽  
Yu Chen ◽  
Xiaoshuang Shi
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Magnesium Sulfate ◽  
Strength Loss ◽  
Sulfate Attack ◽  
Aluminum Silicate ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Sodium Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Fly ash geopolymer concrete (FAGC) and ordinary Portland cement concrete (OPCC) specimens were immersed in 5% MgSO4solution undergoing 32 wetting-drying and heating-cooling cycles. Their compressive behavior was investigated after every 8 cycles. Several microstructure analysis techniques were applied on the samples to identify the materials formed due to magnesium sulfate attack, including XRD, FTIR, SEM, and EDS. Experimental results elucidated that the compressive strength loss ratio in the heating group of FAGC was 12.7%, while that of OPCC was 17.8%, which means that FAGC had better magnesium sulfate resistance than OPCC. The compressive strength loss of OPCC was due to the formation of gypsum under the magnesium sulfate attack exposed to wetting-drying and heating-cooling cycles. The deterioration mechanisms of FAGC against MgSO4solution were discovered to be that sodium aluminum silicate hydrate (N-A-S-H) gels reacted with MgSO4, leading to the creation of low strength magnesium aluminum silicate hydrate (M-A-S-H) gels.

Study of Physico-chemical parameters of drinking and waste waters in Central Mountains in WadiMaytum, Ieb District , Yemen.

2021 ◽  
pp. 25-32
Author(s):  
Mustafa Siddig Mohammed ELKheir ◽  
Hatil Hashim EL-Kamali ◽  
Mutiaa Ahmed Nashir ◽  
Abdel Gawi EL-Fageeh
Keyword(s):  
Waste Water ◽  
Nickel Chloride ◽  
Permissible Limit ◽  
Total Hardness ◽  
Physico Chemical ◽  
Copper Manganese ◽  
Sodium Magnesium ◽  
Microbiological Parameters ◽  
Nitrite Nitrate ◽  
Iron Manganese

In the present study an attempt has been made to know the concentration of different physico-chemical and microbiological parameters in drinking/waste water samples collected from various wells of WadiMaytum, Ieb District, Yemen. Temperature, pH , EC, TDS, Total hardness, Turbidity, alkalinity, BOD,COD,Total coliforms, Faecal streptococci, sodium, magnesium, iron, calcium, lead, chromium, cadmium, copper, manganese, nickel, chloride, sulphate,nitrite, nitrate, ammonia and bicarbonate were assessed . The concentration levels of different parameters in the study samples are summarized , discussed and compared with drinking/waste water quality standards given by the WHO (1994;2006) APHA (2005)and SLS(1983) Standards. In our study, it was found that EC, TDS, TH, Alkalinity, COD, sodium, magnesium (except in closed well) , calcium and lead values were above permissible limit for drinking water whereas pH, turbidity, chlorine, sulphate, nitrates , nitrites, ammonia , iron, manganese, nickel (except in B and C wells), chromium, cadmium and copper values were within the permissible limit.

scholarly journals Mechanical properties and biocompatibility of polymer infiltrated sodium aluminum silicate restorative composites

2017 ◽  
Vol 6 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Huining Wang ◽  
Bencang Cui ◽  
Jing Li ◽  
Shu Li ◽  
Yuanhua Lin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Silicate ◽  
Sodium Aluminum Silicate ◽  
Restorative Composites

Structural and Chemical Analysis of Micro-sized Particles Found in Aluminous Electrical Porcelains

1999 ◽  
Vol 5 (4) ◽  
pp. 247-253 ◽  
Author(s):  
S. Bribiesca-Vázquez ◽  
R. Quintana-Puchol ◽  
J. Reyes-Gasga
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Glassy Phase ◽  
Unit Cell ◽  
Aluminum Silicate ◽  
High Concentration ◽  
Slow Cooling ◽  
X Ray ◽  
Silicate Structure ◽  
Sodium Aluminum Silicate ◽  
Eds Microanalysis

Abstract: Uncommon, micro-sized particles with different morphologies were found in sintered aluminous electrical porcelains. The presence of these particles seems to be relatively insensitive to changes in composition of the porcelain system as well as in firing temperatures. X-ray energy-dispersive spectrometry (EDS) microanalysis showed that some particles, those with very well–defined geometries, were composed of K, Si, Al, and O with empirical formula KAlSi2O6—that is, leucite particles. Other particles showed less well–defined geometries, including some composed of Na, Si, Al, and O, corresponding to a sodium aluminum silicate structure, and others of K, Si, Na, Al, and O, corresponding to the leucite composition, where some K has been substituted for Na. The well–defined geometry particles were detected most often, and diffraction analysis with backscattering electrons showed that their unit cell was cubic, with unit cell parameter a = 1.343 nm. The formation of these particles may be the result of the relatively high concentration of K2O and/or Na2O in some very localized zones of the glassy phase due to weak coupling (e.g., alkali-enriched or -depleted melts) during diffusion at a slow cooling rate in the presence of catalytic agents such as TiO2.

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