scholarly journals Effect of Granite Residue Incorporation on the Behavior of Mortars

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1449 ◽  
Author(s):  
Afonso Rangel Garcez de Azevedo ◽  
Markssuel Teixeira Marvila ◽  
Laimara da Silva Barroso ◽  
Euzébio Bernabé Zanelato ◽  
Jonas Alexandre ◽  
...  
Keyword(s):  
Water Retention ◽  
Building Materials ◽  
Building Construction ◽  
Squeeze Flow ◽  
Technological Properties ◽  
Rheological Characterization ◽  
Ornamental Stone ◽  
Fresh State ◽  
The World ◽  
Residue Incorporation

Civil construction is one of the most resource-consuming sectors in the world. For this reason, the last years have witnessed the study of reusing industrial residues in building materials. The ornamental stone processing industry has a considerable environmental liability related to residue generation during the cutting stages of granite blocks. The objective of this work is to analyze the viability of incorporating granite residues, up to 100%, to substitute sand in coating mortars for building construction. Mortars without residue, as control, and incorporated with 20, 40, 60, 80, and 100% of granite residue were subjected to consistency tests, incorporated air and water retention together with the rheological characterization using the squeeze-flow and the dropping-ball methods. The results show that mortars with 40% granite residues presented greater plastic deformation, helping their applicability by also presenting improved technological properties in the fresh state.

scholarly journals Study of the influential factors on the rheological behavior of adhesive mortar available in the market

2013 ◽  
Vol 6 (3) ◽  
pp. 399-413 ◽  
Author(s):  
M. R. M. M. Costa ◽  
E. Pereira ◽  
R. G. Pileggi ◽  
M. A. Cincotto
Keyword(s):  
Particle Size ◽  
Rheological Behavior ◽  
Compressive Load ◽  
Particle Morphology ◽  
Influential Factors ◽  
Synergistic Action ◽  
Squeeze Flow ◽  
Rheological Characterization ◽  
Fresh State

Rheology studies the deformation and flow of matter and seeks to describe the deformations of material depending on the time they are exposed to mechanical actions. This paper proposes to understand the behavior of fresh mortar adhesives in Squeeze Flow tests based on rheological characterization of different commercial compositions. In the tests, flow of material results from the application of a compressive load on the sample in the fresh state which causes displacement due to stresses generated during radial shear flow. We performed further physical characterizations of mortars and viscosity on material passing the through a sieve with a 0.075 mm sieve opening with the objective of basing the analysis of the results obtained from Squeeze Flow tests. It was observed that the mortars studied showed differences in rheological behavior, probably resulting from synergistic action of some of the composition parameters, especially the particle size distribution and particle morphology.

scholarly journals Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2069
Author(s):  
Markssuel Teixeira Marvila ◽  
Afonso Rangel Garcez de Azevedo ◽  
Paulo Ricardo de Matos ◽  
Sérgio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Water Retention ◽  
Mass Density ◽  
Sodium Content ◽  
Squeeze Flow ◽  
Rheological Characterization ◽  
Hardened State ◽  
Furnace Slag

The fresh and rheological properties of alkali mortars activated by blast furnace slag (BFS) were investigated. Consistency tests, squeeze flow, dropping ball, mass density in the hardened state, incorporated air, and water retention were performed. Mortars were produced with the ratio 1:2:0.45 (binder:sand:water), using not only ordinary Portland cement for control but also BFS, varying the sodium content of the activated alkali mortars from 2.5 to 15%. The results obtained permitted understanding that mortars containing 2.5 to 7.5% sodium present a rheological behavior similar to cementitious mortars by the Bingham model. In turn, the activated alkali mortars containing 10 to 15% sodium showed a very significant change in the properties of dynamic viscosity, which is associated with a change in the type of model, starting to behave similar to the Herschel–Bulkley model. Evaluating the properties of incorporated air and water retention, it appears that mortars containing 12.5% and 15% sodium do not have compatible properties, which is related to the occupation of sodium ions in the interstices of the material. Thus, it is concluded that the techniques used were consistent in the rheological characterization of activated alkali mortars.

RISHTAN SCHOOL OF CERAMICS

2019 ◽  
Vol 16 (2) ◽  
pp. 73-77
Author(s):  
Akmal Marozikov ◽  
Keyword(s):  
Central Asia ◽  
Building Materials ◽  
Works Of Art ◽  
The World ◽  
Ferghana Valley ◽  
History Of ◽  
Made In ◽  
National Style

Ceramics is an area that has a long history of making clay bowls, bowls, plates,pitchers, bowls, bowls, bowls, pots, pans, toys, building materials and much more.Pottery developed in Central Asia in the XII-XIII centuries. Rishtan school, one of the oldest cities in the Ferghana Valley, is one of the largest centers of glazed ceramics inCentral Asia. Rishtan ceramics and miniatures are widely recognized among the peoples of the world and are considered one of the oldest cities in the Ferghana Valley. The article discusses the popularity of Rishtan masters, their products made in the national style,and works of art unique to any region

scholarly journals Role of Biochar in Improving Sandy Soil Water Retention and Resilience to Drought

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 407
Author(s):  
Ling Li ◽  
Yong-Jiang Zhang ◽  
Abigayl Novak ◽  
Yingchao Yang ◽  
Jinwu Wang
Keyword(s):  
Climate Variability ◽  
Sandy Soil ◽  
Water Retention ◽  
Sandy Soils ◽  
Crop Productivity ◽  
Future Research ◽  
Soil Water Retention ◽  
The World ◽  
Water Holding

In recent years, plants in sandy soils have been impacted by increased climate variability due to weak water holding and temperature buffering capacities of the parent material. The projected impact spreads all over the world, including New England, USA. Many regions of the world may experience an increase in frequency and severity of drought, which can be attributed to an increased variability in precipitation and enhanced water loss due to warming. The overall benefits of biochar in environmental management have been extensively investigated. This review aims to discuss the water holding capacity of biochar from the points of view of fluid mechanics and propose several prioritized future research topics. To understand the impacts of biochar on sandy soils in-depth, sandy soil properties (surface area, pore size, water properties, and characteristics) and how biochar could improve the soil quality as well as plant growth, development, and yield are reviewed. Incorporating biochar into sandy soils could result in a net increase in the surface area, a stronger hydrophobicity at a lower temperature, and an increase in the micropores to maximize gap spaces. The capability of biochar in reducing fertilizer drainage through increasing water retention can improve crop productivity and reduce the nutrient leaching rate in agricultural practices. To advance research in biochar products and address the impacts of increasing climate variability, future research may focus on the role of biochar in enhancing soil water retention, plant water use efficiency, crop resistance to drought, and crop productivity.

Wood in Architecture: Rediscover the Material of Our Time

2011 ◽  
Vol 224 ◽  
pp. 94-98
Author(s):  
Chang An Liu
Keyword(s):  
Building Materials ◽  
The World ◽  
Material Imagination ◽  
Single Material

Wood has been one of the most popular building materials of the world and wooden buildings served as the predecessors and prototypes of architecture in history. This paper focuses on a single material, wood, as a tool to discuss the potential continuity of meaning in the material language of architecture and addresses the topic of the material imagination in architecture.

Investigation of Thermal Insulation Materials Based on Easy Renewable Row Materials from Agriculture

2011 ◽  
Vol 335-336 ◽  
pp. 1412-1417 ◽  
Author(s):  
Jiri Zach ◽  
Jitka Peterková ◽  
Vít Petranek ◽  
Jana Kosíková ◽  
Azra Korjenic
Keyword(s):  
Thermal Insulation ◽  
Building Materials ◽  
Raw Materials ◽  
Building Construction ◽  
Materials Development ◽  
Insulation Materials ◽  
Thermal Insulating ◽  
Plastic Materials ◽  
Energy Consuming ◽  
Rock Wool

Production of building materials is mostly energy consuming. In the sphere of insulation materials we mostly see rock wool based materials or foam-plastic materials whose production process is demanding from material aspect and raw materials aspect as well. At present the demand for thermal insulation materials has been growing globally. The thermal insulation materials form integral part of all constructions in civil engineering. The materials mainly fulfill the thermal insulating functions and also the sound-insulating one. The majority of thermal insulation materials are able to fulfill both of the functions simultaneously. The paper describes questions of thermal insulation materials development with good sound properties based on natural fibres that represent a quickly renewable source of raw materials coming from agriculture. The main advantage of the materials are mainly the local availability and simple renewability of the raw materials. In addition an easy recycling of the materials after their service life end in the building construction and last but not least also the connection of human friendly properties of organic materials with advanced product manufacture qualities of modern insulation materials.

scholarly journals Whey powder in the preparation of pastry creams

2018 ◽  
Vol 1 (1) ◽  
pp. 158-167
Author(s):  
Dilmi Bouras Abdelkader ◽  
Delmi Bouras Amina ◽  
Megatli Ismail
Keyword(s):  
Water Retention ◽  
Whey Powder ◽  
The World

Algeria imports more than half of her milk requirements. The annual bill exceeds $ 1 billion. Faced with this situation, she must now think about finding a way to reduce this dependence by replacing cow's milk, in part, with another commodity abundant in the world and cheaper. In this work we used whey powder in the preparation of pastry creams. The results showed that 80% of tasters find the CA cream (100% whey) is extremely pleasant and gave it a 9/9 rating. The comparison between different pastry creams revealed that the cream prepared with 100% whey (CA) presents the best appreciations. Similarly, it presents texture improvements, smooth and homogeneous with a clear appearance and a very pleasant smell. Among the positive points we noted that the addition of whey improves water retention and reduces syneresis. Whey creams have kept a good quality after 7 days of storage at 6ºC.

scholarly journals Architecture in the Islamic Vision

2020 ◽  
Vol 6 (1) ◽  
pp. 1-6
Author(s):  
Yehia Hassan Wazeri
Keyword(s):  
Content Analysis ◽  
Building Materials ◽  
Town Planning ◽  
Analysis Method ◽  
The Earth ◽  
Content Analysis Method ◽  
The World ◽  
Holy Quran ◽  
The Holy Quran ◽  
Shed Light

The Qur’an contains about eighteen verses that refer to the architecture of the earth. Nearly two hundred elements (terminologies) of architecture and town planning have been mentioned in the Quran. This paper aims to present examples from the Quran to shed light on the Islamic vision of architecture and art. It uses content analysis method to achieve the objective of the research. The analysis is done by studying and discussing verses of the Holy Quran, which is related to architecture and urbanism. One of the most important results of this research is to give distinct architectural and urban examples, include the following: building materials, environmental architecture, houses of insects, visual illusions in architecture, and the centrality of Mecca to the world. All of them is explained in the Qur’an verses, such as Al-Baqarah, An-Naml, An-Nahl, Al-Kahf, and Al-Fajr. 

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