scholarly journals Mix Proportion Theory of Strength Controlling Concrete Containing Large Quantity of Coal Ash.

2002 ◽  
Vol 51 (10) ◽  
pp. 1111-1116
Author(s):  
Yasunori MATSUFUJI ◽  
Tomoyuki KOYAMA ◽  
Korekiyo ITO
Keyword(s):  
Coal Ash ◽  
Mix Proportion ◽  
Proportion Theory

scholarly journals Mix Proportion Principle of Concrete Containing Large Quantity of Coal Ash with Constant Cement Content

2001 ◽  
Vol 12 (2) ◽  
pp. 51-60 ◽  
Author(s):  
Yasunori Matsufuji ◽  
Tomoyuki Koyama ◽  
Kenji Funamoto ◽  
Korekiyo Ito
Keyword(s):  
Cement Content ◽  
Coal Ash ◽  
Mix Proportion

Research on the Engineering Properties of Fly Ash as Backfill

2014 ◽  
Vol 852 ◽  
pp. 137-141
Author(s):  
Feng Wei
Keyword(s):  
Fly Ash ◽  
Bearing Capacity ◽  
Laboratory Experiments ◽  
Engineering Application ◽  
Coal Ash ◽  
Engineering Properties ◽  
Dry Density ◽  
Mixture Ratio ◽  
Mix Proportion ◽  
Backfill Materials

The foundation backfill materials with pulverized coal ash and admixture gypsum fly ash were studied. The laboratory experiments were designed to determine its compaction characteristics, compressibility, intensity and bearing capacity of foundation with different mixture ratio. Dry density and strength property of fly ash with different water content were analysed. The result shows that the modulus, strength and foundation bearing capacity all have been greatly improved when gypsum was added into fly ash The proper mix proportion of the gypsum fly ash is very suitable for engineering application and this research provides a scientific reference for the similar projects.

Pengaruh Penggunaan Batu Basalt Lampung dan Batubara dalam Bahan Baku terhadap Karakteristik Klinker

2020 ◽  
Vol 10 (1) ◽  
pp. 49
Author(s):  
Suharto Suharto ◽  
Muhammad Amin ◽  
Muhammad Al Muttaqii ◽  
Syafriadi Syafriadi ◽  
Kiki Nurwanti
Keyword(s):  
Experimental Study ◽  
Raw Materials ◽  
Coal Ash ◽  
Heating Time ◽  
Raw Material ◽  
Silica Sand ◽  
Cement Clinker ◽  
Duration Of Heating

Experimental study on the use of basalt stone originated from Lampung has been conducted to evaluate its potential for a partial substitute of raw material in production of cement clinker. The basalt stone contains minerals of anorthite, augite, and albite phases that are required for clinker formation. In this study, the main raw materials were 80% limestone, 10% silica sand, 9% clay and 1% iron sand. The raw material in these experiments were mixtures 90% or 80% of the main raw material and 10% or 20% of basalt stone. The effect of adding coal to raw materials was also studied to see the possibility of an increase in clinkerization temperature inside the raw material mixture, and at the same time to see the effect of coal ash on clinker composition. Clinker obtained from heating of raw materials at a temperature of 1100oC had LSF of 94.1% and 95.1% (heating time of 1 and 3 hours). If heating is carried out at 1200oC, the clinker had LSF of 97.7% and 98.0% (heating time of 2 and 3 hours, respectively). Depending on the temperature and duration of heating, the clinker mostly had SM in the range of 2.18-2.40% , and AM in the range of 0,78-1.80%. Characterization using XRD showed that the clinker consisted of larnite and gehlenite phases, and dominated by CaO.Batu basalt Lampung telah diuji potensinya sebagai pengganti sebagian bahan baku utama pembuatan klinker semen. Batu basalt tersebut memiliki mineral-mineral dalam fase anorthite, augite, dan albite yang diperlukan pada pembentukan klinker. Pada penelitian ini, bahan baku utama adalah batu kapur 80%, pasir silika 10%, tanah liat 9% dan pasir besi 1%. Campuran bahan baku klinker adalah 90% atau 80% bahan baku utama dan 10% atau 20% batu basalt. Efek penambahan batubara ke dalam bahan baku klinker juga dipelajari untuk melihat kemungkinan kenaikan temperatur klinkerisasi di dalam campuran bahan baku, dan sekaligus untuk melihat efek abu batubara terhadap komposisi klinker. Klinker hasil pemanasan bahan baku pada temperatur 1100oC memiliki LSF 94,1% dan 95,1% (lama pemanasan 1 dan 3 jam). Jika pemanasan dilakukan pada 1200oC, klinker memilik LSF 97,7% dan 98,00% (lama pemanasan 2 dan 3 jam). Tergantung pada temperatur dan lama pemanasan, klinker hasil percobaan ini umumnya memiliki SM 2,18-2,40%, dan AM antara 0,78-1,80%. Karakterisasi dengan XRD menunjukkan bahwa klinker terdiri dari fase larnite dan gehlenite, dan didominasi CaO.

scholarly journals Sustainable Concrete Application in the Manufacture of University Urban Furniture

2019 ◽  
Vol 303 ◽  
pp. 05001
Author(s):  
Mónica Bedoya ◽  
Federico Rivera ◽  
María Rico ◽  
David Vélez ◽  
Andrés Urrego ◽  
...  
Keyword(s):  
Finite Elements ◽  
Mechanical Characteristics ◽  
Coal Ash ◽  
Sustainable Concrete ◽  
Waste Production ◽  
Construction And Demolition Wastes ◽  
The World ◽  
Sustainable Materials ◽  
The University ◽  
Community Diagnosis

It is clear that construction and demolition wastes (CDW) are constantly increasing throughout the world and these wastes can be used effectively to minimize the consumption of natural resources in the manufacture of more sustainable concrete. The CDW occupy an important segment of world waste production and its generation reached approximately 3 billion tons in 2012 in 40 countries [1]. Although this topic has been studied in the world, it is still valid for the reuse of waste that is constantly increasing, and although in many countries there are already examples of its use this type of concrete in Colombia and in the Medellìn city lacks applications. This project proposes the application of a sustainable concrete made with CDW and coal ash in the Medellín city for its implementation in the construction of urban furniture. A university community diagnosis of the needs in terms of furnishing was made. With the design reached, a modular chair was proposed to enable spaces within the university. The mechanical characteristics of the concrete and the design of the chair are evaluated and a simulation is done through finite elements to evaluate the viability of the proposed concrete, finding that with these properties is possible to manufacture durable and sustainable furniture that serves as an example for the application of sustainable materials

scholarly journals Coal ash and limestone interactions in quicklime production

Fuel ◽  
2021 ◽  
Vol 300 ◽  
pp. 120989
Author(s):  
Karin Sandström ◽  
Markus Broström ◽  
Matias Eriksson
Keyword(s):  
Coal Ash
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