Synthesis and Characterization of Calcium Silicate From Rice Husk Ash and Snail Shell

Husain, Sadang; Haryanti, Ninis Hadi; Suryajaya, Suryajaya; Permitaria, Antung

doi:10.18860/neu.v11i2.6608

Cited by 9 publications

(4 citation statements)

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“…The band of 1000 cm –1 seemed to increase the intensity of the Si–O–Si band that was observed at 1100 cm –1 . 26 The absorption bands at around 1600 and 3500 cm –1 were related to −OH groups; they occurred due to the hydrophilic nature of the calcium silica aerogels, which means that the samples tend to capture the humidity from the air. 27 , 28 Results show that calcium was successfully attached to the silica aerogel structure.…”

Section: Resultsmentioning

confidence: 99%

Production and Characterization of Calcium Silica Aerogel Powder as a Food Additive

et al. 2023

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In this study, mesoporous calcium silica aerogels were produced for use as an anticaking food additive in powdered foods. A low-cost precursor (sodium silicate) was used, and calcium silica aerogels with superior properties were obtained with different pH values (pH 7.0 and pH 9.0) by modeling and optimizing the production process. The Si/Ca molar ratio, reaction time, and aging temperature were determined as independent variables, and their effects and interactions to maximize the surface area and water vapor adsorption capacity (WVAC) were evaluated by response surface methodology and analysis of variance. Responses were fitted with a quadratic regression model to find optimal production conditions. Model results showed that the maximum surface area and WVAC of the calcium silica aerogel that was produced with pH 7.0 were achieved at a Si/Ca molar ratio of 2.42, a reaction time of 5 min, and an aging temperature of 25 °C. The surface area and WVAC of calcium silica aerogel powder produced with these parameters were found to be 198 m 2 /g and 17.56%, respectively. According to the results of surface area and elemental analysis, calcium silica aerogel powder produced at pH 7.0 (CSA7) had the best results compared to that produced at pH 9.0 (CSA9). Therefore, detailed characterization methods were examined for this aerogel. The morphological review of the particles was performed with scanning electron microscopy. Elemental analysis was performed via inductively coupled plasma atomic emission spectroscopy. True density was measured in a helium pycnometer, and tapped density was calculated by the tapped method. Porosity was calculated using an equation using these two density values. The rock salt was powdered with a grinder and used as a model food for this study, and CSA7 was added at a rate of 1% by weight. The results showed that adding CSA7 powder to the rock salt powder at a rate of 1% (w/w) improved the flow behavior from the cohesive region to the easy-flow region. Consequently, calcium silica aerogel powder with a high surface area and high WVAC might be considered as an anticaking agent to use in powdered foods.

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Section: Resultsmentioning

confidence: 99%

Production and Characterization of Calcium Silica Aerogel Powder as a Food Additive

et al. 2023

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“…In addition, carbonyl stretching peaks (COO-) from the chemical structure of Ca-stearate were detected at 1600 cm -1 . The peak for the Si-O-Ca vibration can be seen at 750 cm -1 (114). sity, and thermal conductivity including fly ash-metakaolin ratio, alkalinity, curing temperature, calcium stearate, H 2 O 2 , and expanded perlite.…”

Section: Ftir Analysismentioning

confidence: 96%

A mini guideline study for fly ash-based alkali activated foam masonry units

Kurtuluş

Başpınar

2022

materconstrucc

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This study examined the preparation of fly ash-based foam geopolymer recipes with the experimental design method and data analysis with the SPSS program. A total of 54 prescriptions were used in the studies, which investigated six different variables. Strength, density, and thermal conductivity analyses were performed. Values were in the range of 0.57-2.75 MPa for strength, 344-592 kg/m3 for density, and 0.089-0.132 for thermal conductivity. Three variables were identified with each having the most significant effect on strength and density values. H2O2, curing temperature, and expanded perlite had the most effect on strength, while H2O2, curing temperature, and alkali concentration had the most significant effect on density. Most influential parameters are plotted on ternary graphs to ensure that the foam concrete (CLC) masonry units used in all types of masonry walls, whether load-bearing or not, can operate under the specified performance conditions.

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“…The shells were then furnaced for 2 hours at 8000C. The purpose of this process is to obtain CaO compounds from the shells of seashells (Husain et al, 2019). Furthermore, the clam shells that have been in the furnace are aerated at room temperature.…”

Section: Calcium Oxide Preparationmentioning

confidence: 99%

The effect of calcium oxide addition from feather clam shells on porosity and water adsorption geopolymer composite bricks

Nurfajriani,

Wahyudi

2023

J. Pendidik. Kim

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The purpose of this study was to study the effect of adding CaO (calcium oxide) from clam shell ash on physical properties such as density, porosity and water absorption on geopolymer composite bricks. Geopolymer composite bricks are made by mixing sand, geopolymers synthesized from fly ash with NaOH and Na2SiO3 and calcium oxide calcined from feather clam shell which is printed in cylinder form. The bricks are then cured for 28 days and physical tests are carried out in the form of density, water absorption and porosity tests. The results showed that the most optimal addition of CaO is 7.5% for the physical properties of geopolymer composite bricks with a density value of 1.80 gr/cm3, a porosity value of 10.30% and a water absorption capacity of 4.68%. The value has filled the quality standard 1st for bricks set by Indonesian National Standard (SNI).

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Synthesis and Characterization of Calcium Silicate From Rice Husk Ash and Snail Shell

Cited by 9 publications

References 0 publications

Production and Characterization of Calcium Silica Aerogel Powder as a Food Additive

Production and Characterization of Calcium Silica Aerogel Powder as a Food Additive

A mini guideline study for fly ash-based alkali activated foam masonry units

The effect of calcium oxide addition from feather clam shells on porosity and water adsorption geopolymer composite bricks

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